Viper with a few more bhp than standard
Discussion
Following my two Subaru threads and my BAC Mono thread, in which I hinted about a Viper, here it is.
As it is in the US and mods happen to it without me knowing or with little detail, I am not so up to speed with it as i am with the Subarus and now the Mono.
So it will not be in the detail of the other cars.
So back in 2017 I started to get an itch for a V8. When I talk about V8 I dont mean M3, M5, E63 rather an Aussie or US muscle car V8. Looked at old modified Monaros, Toranas, Commodores and Falcons and there were many that I liked. But then i though of looking at US and seeing the Hellcat got me thinking. After a few failed attempts in sourcing one, I turned my attention to Vipers. Made some good contacts through some workshops and they looked at the cars for me depending where they were located.
So a deal was struck on a Viper ACR. 8.4lV10 645 bhp. Very understressed engine. Carbon brakes and lots of aero as it was designed to beat the Europeans on track. The idea was to get a nice head and cam package and leave as is and bring to Cyprus. First mods were a 9L stroker package:
Head/Cam
- Custom Spec Cam
- CNC Ported And Polished Cylinder Heads
- Upgraded Valves
- Conical Spring
- Titanium Retainers
- Bronze Valve Guides
- Vario-Cam Delete Kit
- Upgraded Johnson Lifters
Engine:
- Custom 9L Crank
- Custom 9L Piston/Rod Combo
- Rod Bearing Service
- Reworking of the the oiling system
- Headers And Custom Exhaust With Billet V-Bands
Nice 785whp.....
However a visit over to Texas where the work was being done put paid to that idea. This is the land of 1000bhp 911 turbos as a starter, 1500hp GTRs, and twin turbo Lambos with over 2000 hp and of course twin turbo Vipers.
So a decision was made to twin turbo it and being a stroker package power outputs woudl be higher than doing the work to a stock 8.4l as per below whp packages
Packages started at a nice 1100whp on pump gas with twin 67mm turbos (1300 on C16). This could be done on a stock motor but obviously with a lot of anciliairy work such as machined crank, bearings and upgrades to fuelling. A lot of work required from the point of view of going turbo on a NA engine.
1600whp with 72mm turbos. This requires a built moror and although power on pump fuel is only 1150 it jumps to 1600 on C16
1800whp with same 72mm turbos but with some extra engine work.
2000 whp with 76mm turbos. This was the highest power package available. 1350whp on pump and you guessed it 2000 on C16. With the stroker package 2100whp was on the cards. So this was installed.
Custom Twin Billet 76mm 42R Turbo Chargers
- Turbosmart Billet Wastegates
- Turbosmart Billet Blow Off Valves
- Custom Fabricated Stainless Steel SCH10 Exhaust Manifolds With 5-1 Billet Collectors
- Custom Fabricated Stainless Steel SCH10 Midpipes
- Custom Fabricated Stainless Steel 4" Exhaust Using Aircraft Quality Metal
- High Temp Ceramic Coating On Exhaust Manifolds
- Custom Made Manifold/Midpipe Mittens
- Custom Fabricated Aluminum Induction System
- Custom Fabricated Air To Water Intercooler System
FUEL SYSTEM:
- Billet Fuel Pump Hanger
- Triple High Flow Fuel Pumps
- Custom Machined Billet Fuel Rails With Billet Holding Straps
- Fore Innovations Billet Fuel Pressure Regulator
- ID2600 Injectors
-Fuel Lab Fuel Filters
CLUTCH:
- RPS Quad Carbon Carbon
DRIVETRAIN:
- PPG Sequential
- Custom Strange IRS 9" With Custom Brackets
- Billet Axles
- Upgraded Driveshaft
SUSPENSION:
- DCS Electronic Suspension And Brain
TUNING:
- M1 Motec With Dev Lic And Ninjaneering Firmware
- Custom Wire Harness
- Boost By Gear
- WOT Sequential Shifting And Auto Blip Downshifts
ENGINE:
- Stage 4 Engine Build
- Upgraded Head Studs And Main Studs
- Upgraded Push Rods
- CNC Ported Race Heads
- Titanium Intakes Valves, Inconel Exhaust Valves
- Copper Seats
- Jesel Rocker Arms With Steel Exhaust Rockers
You may notice standard block. It is rated for 3000bhp before issues may start.
As it is in the US and mods happen to it without me knowing or with little detail, I am not so up to speed with it as i am with the Subarus and now the Mono.
So it will not be in the detail of the other cars.
So back in 2017 I started to get an itch for a V8. When I talk about V8 I dont mean M3, M5, E63 rather an Aussie or US muscle car V8. Looked at old modified Monaros, Toranas, Commodores and Falcons and there were many that I liked. But then i though of looking at US and seeing the Hellcat got me thinking. After a few failed attempts in sourcing one, I turned my attention to Vipers. Made some good contacts through some workshops and they looked at the cars for me depending where they were located.
So a deal was struck on a Viper ACR. 8.4lV10 645 bhp. Very understressed engine. Carbon brakes and lots of aero as it was designed to beat the Europeans on track. The idea was to get a nice head and cam package and leave as is and bring to Cyprus. First mods were a 9L stroker package:
Head/Cam
- Custom Spec Cam
- CNC Ported And Polished Cylinder Heads
- Upgraded Valves
- Conical Spring
- Titanium Retainers
- Bronze Valve Guides
- Vario-Cam Delete Kit
- Upgraded Johnson Lifters
Engine:
- Custom 9L Crank
- Custom 9L Piston/Rod Combo
- Rod Bearing Service
- Reworking of the the oiling system
- Headers And Custom Exhaust With Billet V-Bands
Nice 785whp.....
However a visit over to Texas where the work was being done put paid to that idea. This is the land of 1000bhp 911 turbos as a starter, 1500hp GTRs, and twin turbo Lambos with over 2000 hp and of course twin turbo Vipers.
So a decision was made to twin turbo it and being a stroker package power outputs woudl be higher than doing the work to a stock 8.4l as per below whp packages
Packages started at a nice 1100whp on pump gas with twin 67mm turbos (1300 on C16). This could be done on a stock motor but obviously with a lot of anciliairy work such as machined crank, bearings and upgrades to fuelling. A lot of work required from the point of view of going turbo on a NA engine.
1600whp with 72mm turbos. This requires a built moror and although power on pump fuel is only 1150 it jumps to 1600 on C16
1800whp with same 72mm turbos but with some extra engine work.
2000 whp with 76mm turbos. This was the highest power package available. 1350whp on pump and you guessed it 2000 on C16. With the stroker package 2100whp was on the cards. So this was installed.
Custom Twin Billet 76mm 42R Turbo Chargers
- Turbosmart Billet Wastegates
- Turbosmart Billet Blow Off Valves
- Custom Fabricated Stainless Steel SCH10 Exhaust Manifolds With 5-1 Billet Collectors
- Custom Fabricated Stainless Steel SCH10 Midpipes
- Custom Fabricated Stainless Steel 4" Exhaust Using Aircraft Quality Metal
- High Temp Ceramic Coating On Exhaust Manifolds
- Custom Made Manifold/Midpipe Mittens
- Custom Fabricated Aluminum Induction System
- Custom Fabricated Air To Water Intercooler System
FUEL SYSTEM:
- Billet Fuel Pump Hanger
- Triple High Flow Fuel Pumps
- Custom Machined Billet Fuel Rails With Billet Holding Straps
- Fore Innovations Billet Fuel Pressure Regulator
- ID2600 Injectors
-Fuel Lab Fuel Filters
CLUTCH:
- RPS Quad Carbon Carbon
DRIVETRAIN:
- PPG Sequential
- Custom Strange IRS 9" With Custom Brackets
- Billet Axles
- Upgraded Driveshaft
SUSPENSION:
- DCS Electronic Suspension And Brain
TUNING:
- M1 Motec With Dev Lic And Ninjaneering Firmware
- Custom Wire Harness
- Boost By Gear
- WOT Sequential Shifting And Auto Blip Downshifts
ENGINE:
- Stage 4 Engine Build
- Upgraded Head Studs And Main Studs
- Upgraded Push Rods
- CNC Ported Race Heads
- Titanium Intakes Valves, Inconel Exhaust Valves
- Copper Seats
- Jesel Rocker Arms With Steel Exhaust Rockers
You may notice standard block. It is rated for 3000bhp before issues may start.
So this was a very nice spec and dynoed at 2100whp on C16. This is beyond comprehension. The engine is so tractable and the Motec is an amazing thing in controlling traction and feeding in just enough power to keep it from spinning up too much. Tyres were also changed to R888s as they found that they were the best for traction.
Videos
The street videos (in Mexico) are at 1400whp on pump gas.
I have to find some more dyno videos for tomorrow.
Videos
The street videos (in Mexico) are at 1400whp on pump gas.
I have to find some more dyno videos for tomorrow.
Edited by Falcon500 on Thursday 28th May 10:12
CHARLESBERG said:
Wow! Where is the car now? Surely with 2100bhp on Cyprus, one jab of the throttle and you’d be the other side of the island!
Still in US. Will bring it over in a few years. Have the slow 600bhp odd Subarus and the Mono to keep me busy. Yes it will be interesting as not the wide open spaces of Texas and Mexico..
Obi Wan said:
That’s mental! I can’t imagine what WOT feels like but I’ve always wondered with these massive horsepower tunner cars though what the drivability is like.
The beauty of the Viper is being 8.4l and now stroked it has massive torque as well. If I recall with 1300whp it also has 1100ft lbs torque and over 1600 on C16. So even though turbos are quite large the engine is not struggling to spin them up. A great starting point.Also the Motec is the magic here. It controls the power delivery based on several sensors. Wheelspin is kept to a minimum and it digs and goes. I believe also the chassis design is a contributing factor.
samoht said:
Monaro - not a bad idea
Viper - pretty cool
Viper ACR - really quite interesting with the suspension and aero
Head/cam - sounds great to make it more revvy / characterful
9.0L stroker kit - surely getting a bit excessive now ?
Twin turbos putting out 2,000 hp - this is for a fighter plane, right??
Actually on that last point, it's interesting that a third of the power is unlocked by running on the high-octane fuel - I've heard it said that our ability to refine high-octane fuels was one of the key factors in winning the air war in WW2, and this fits with that.
Yes there is a heap of power tucked away waiting for the high octane fuel. We are now seeing some good results on e85. Closer to the C16. Probably right about the fuel and WW2 though. Viper - pretty cool
Viper ACR - really quite interesting with the suspension and aero
Head/cam - sounds great to make it more revvy / characterful
9.0L stroker kit - surely getting a bit excessive now ?
Twin turbos putting out 2,000 hp - this is for a fighter plane, right??
Actually on that last point, it's interesting that a third of the power is unlocked by running on the high-octane fuel - I've heard it said that our ability to refine high-octane fuels was one of the key factors in winning the air war in WW2, and this fits with that.
Thanks for the compliments. It really is initimidating but also you realise that all under control at the same time. A 720S feels slooooow.
RE UGR Lambos. I only became aware of them after racing half mile and roll racing at tx2k. They are our major competition and we have some way to go to catch the fastest ones but we are close. They are so nice though but a lot more expensive as well. I am aware of the best being 3000bhp, but also have been told that they require frequent rebuilds and not street friendly. I do not know that for sure though and could be just pub talk from everyone who cannot beat them . But definitely the fastest are at least 2700 and up.
RE UGR Lambos. I only became aware of them after racing half mile and roll racing at tx2k. They are our major competition and we have some way to go to catch the fastest ones but we are close. They are so nice though but a lot more expensive as well. I am aware of the best being 3000bhp, but also have been told that they require frequent rebuilds and not street friendly. I do not know that for sure though and could be just pub talk from everyone who cannot beat them . But definitely the fastest are at least 2700 and up.
Regarding perfromance and dragy times. They dont even bother measuring 0-60, 0-124 etc. You race, you win or lose.
But i did make them put a Dragy in. From from what i recall at 1980whp-
qtr mile is 8.7 at 175mph. Slowish qtr as not launched hard off the line but with good trap speed. Any decently fast car would have it off the line and for first 100meters and then it's good night. I am sure with a qtr mile setup it would run high 7s easily.
Half mile is where it's at. I think this was 13 point something secs at 218mph the day after it was built. Again not launching it, just drive off fast.
Roll racing is also another good indicator That is come through the staging area at around 60mph get green light and hold on. I think track is around 1400 feet or 487 metres once through the light. In 2019 did multiple runs at 198mph in around 9seconds. Had more in it but a rod decided it was not strong enough.
In March 2020 we managed 204mph in around 8.7secs as 2100whp due to some new stronger rods, bigger turbos and billet block. of course 5th gear broke. The Vipers are fastest RWD cars but the best UGR Lambo did 230
Gearing is set for max 235mph.
I recall 0 to 62mph is 2.5 but that is not launching hard as the Motec decides how much power based on grip. So just as fast on the pump fuel as C16 at these speeds as full power woudl rexult in wheelpsin all day. 0-124 is around 4.5 and then onto 175 in 8.5. I think we saw 0-186 in 9.5. The massive rear wing both helps and hinders at those speeds. good for stability and putting power down but also creates drag.
The Motec shows that all 2000whp is deployed in 3rd gear. Less in 1st and 2nd but I do recall 1500 ft lbs torque in 2nd. It really allows the car to work with this power. In a split second the Motec works out grip levels and goes from there.
Another photo for your viewing pleasure.
But i did make them put a Dragy in. From from what i recall at 1980whp-
qtr mile is 8.7 at 175mph. Slowish qtr as not launched hard off the line but with good trap speed. Any decently fast car would have it off the line and for first 100meters and then it's good night. I am sure with a qtr mile setup it would run high 7s easily.
Half mile is where it's at. I think this was 13 point something secs at 218mph the day after it was built. Again not launching it, just drive off fast.
Roll racing is also another good indicator That is come through the staging area at around 60mph get green light and hold on. I think track is around 1400 feet or 487 metres once through the light. In 2019 did multiple runs at 198mph in around 9seconds. Had more in it but a rod decided it was not strong enough.
In March 2020 we managed 204mph in around 8.7secs as 2100whp due to some new stronger rods, bigger turbos and billet block. of course 5th gear broke. The Vipers are fastest RWD cars but the best UGR Lambo did 230
Gearing is set for max 235mph.
I recall 0 to 62mph is 2.5 but that is not launching hard as the Motec decides how much power based on grip. So just as fast on the pump fuel as C16 at these speeds as full power woudl rexult in wheelpsin all day. 0-124 is around 4.5 and then onto 175 in 8.5. I think we saw 0-186 in 9.5. The massive rear wing both helps and hinders at those speeds. good for stability and putting power down but also creates drag.
The Motec shows that all 2000whp is deployed in 3rd gear. Less in 1st and 2nd but I do recall 1500 ft lbs torque in 2nd. It really allows the car to work with this power. In a split second the Motec works out grip levels and goes from there.
Another photo for your viewing pleasure.
motomk said:
When you get up close to them you realise they are not that big!
Fellow at work owns one, not as mad as your one, although it is converted to right hand drive.
NIce. They are small actually. Look big in pictures but not in reality. I thought about RHD conversion. Maybe a later job when I bring it over to Europe.Fellow at work owns one, not as mad as your one, although it is converted to right hand drive.
As i mentioned in an earlier post the car is in US and I am mainly in Cyprus.
The agreement is that the engine builder uses it and can also use it as a development mule. The breakage of a rod for example was unexpected as it was the first car with a stroker kit on the 2000whp package.
Latest news is that due to the breakage of 5th gear, we will go billet transmission. Also a bit more hp as clearly not enough.
Remember the numbers mentioned are whp not engine power.
So next stage is 2600whp on C16 and 2100 on E85 for street use. I wont say daily use as that is ridiculous.
That will be a combo of custom stonger rods, pistons and of course bigger turbos. PT 8685 rated at 1500bhp each or 8891.
The agreement is that the engine builder uses it and can also use it as a development mule. The breakage of a rod for example was unexpected as it was the first car with a stroker kit on the 2000whp package.
Latest news is that due to the breakage of 5th gear, we will go billet transmission. Also a bit more hp as clearly not enough.
Remember the numbers mentioned are whp not engine power.
So next stage is 2600whp on C16 and 2100 on E85 for street use. I wont say daily use as that is ridiculous.
That will be a combo of custom stonger rods, pistons and of course bigger turbos. PT 8685 rated at 1500bhp each or 8891.
Obi Wan said:
When will you take delivery of the car? I be bouncing off the walls with excitement if I was in your shoes!
I don't think i will bring it to Cyprus for at least another 2 years. See how it goes at circa 3000bhp and if we can crack over 230mph in the half mile. Don't believe I am writing that, given that my Subaru at 520 was so fast and should be really fast @ circa 700. I will see if we can organise a trip to US this year but I doubt that given the situation in US.Leicester Loyal said:
Ridiculous car! Please keep us updated! Any chance of videos of you using the full bhp?
I will. Let me have a look. Some in car footage of half mile runs somewhere. Not on phone so either laptop or with engine builder. I am not allowed to drive it at events such as half mile or tx2k in the US as don't have US licence and need a motorsport licence of some sort. Been a passenger at full power on race fuel.Think warp factor 9. Internals get left behind. I am a fan of rollercoasters and will continually hop off and go around and line up again for a thrill. The Viper is way more intense.Penelope Stopit said:
Yes
Sometime in the future when you get her shipped to Europe
Shipped to Athens, do the run, set a record that will possibly never be bettered and then onwards to Cyprus or wherever
Joking apart, she's stunning
Enjoy, thanks for sharing a little of her here
Yes. Good idea. Why not. Also VMax 220. Just to annoy the hypercarsSometime in the future when you get her shipped to Europe
Shipped to Athens, do the run, set a record that will possibly never be bettered and then onwards to Cyprus or wherever
Joking apart, she's stunning
Enjoy, thanks for sharing a little of her here
205pat said:
0-186 in 9.5 seconds. I firmly believe you don’t need a fast car to have fun - but that must be insane!
No you dont. But it looks like my garage is going toward a standard of 500bhp/tonne with both Subaru's heading that way and the Mono already there. Although Viper will skew that dramatically.Latest news is that we will be looking for 2700whp. So about 3000 at engine.
Some more performance statistics which I unearthed for some 2020 runs, which I thought was 2100whp but was 2230whp. Give or take a little bit on each run.
0-60mph 2.5s
60-130mph 2.7s
100-150mph 2s.
150 -186mph 2.3s
Billet transmission
Billet wheels just made as well.
Some more performance statistics which I unearthed for some 2020 runs, which I thought was 2100whp but was 2230whp. Give or take a little bit on each run.
0-60mph 2.5s
60-130mph 2.7s
100-150mph 2s.
150 -186mph 2.3s
Billet transmission
Billet wheels just made as well.
Thanks for the comments. Yes, its fast. You think a 600bhp Impreza is fast and a 720s is faster again and then there is this.
Yes, it is a Calvo car. Billet is expensive but it does need it, as the PPG was past its limits.
We shall see where it ends up but should be 2800 to 3000bhp. Hope it's still streetable
Yes, it is a Calvo car. Billet is expensive but it does need it, as the PPG was past its limits.
We shall see where it ends up but should be 2800 to 3000bhp. Hope it's still streetable
Due to the Covid issues and looking like no travel to USA this year, I was having thoughts of selling it and getting a 1200hp Ultima RS.
Speaking with engine builder about ut, he said work mainly done and "don't be stupid"
"Fresh motor with new updates, better rods, 86mm turbos and the billet sequential"
"7 sec qtr mile pass and 240mph in half mile"
He wants the title of fastest Viper in the world.
Who am I to argue with such information. I guess it stays.
Speaking with engine builder about ut, he said work mainly done and "don't be stupid"
"Fresh motor with new updates, better rods, 86mm turbos and the billet sequential"
"7 sec qtr mile pass and 240mph in half mile"
He wants the title of fastest Viper in the world.
Who am I to argue with such information. I guess it stays.
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