My Honda Accord Type R Big Turbo
Discussion
britsportscars said:
Holy s
t!
That thing's going to be a monster! I'm liking the standard look of it too, should surprise quite a few other cars!!
Might be a noobish question but when you add a Turbo to a VTEC motor, do you need to alter the VTEC system in any way or does it just continue working as normal? I suppose when the VTEC does kick in at 6000 (or whatever) it would be a much bigger kick because of the Turbo?
I remember reading a while back about problems with turbo's and vtec (may be totally wrong here), but some builders even disabled and changed components..t!That thing's going to be a monster! I'm liking the standard look of it too, should surprise quite a few other cars!!
Might be a noobish question but when you add a Turbo to a VTEC motor, do you need to alter the VTEC system in any way or does it just continue working as normal? I suppose when the VTEC does kick in at 6000 (or whatever) it would be a much bigger kick because of the Turbo?
Let me dig a bit...
I found this
"In a low pressure turbo system, the VTEC cam profiles are used to maintain the same torque curve shape as a N/A VTEC engine, only difference is the torque curve is higher. In a high pressure turbo system, the VTEC system is disabled because the high lift cam at high rpms do not work well with high boost. What happens is the valves are still open during compression stroke, so the boosted mixture escapes before the valves close, therefore robbing you of power at high rpms. Since the low rpm cam profile doesn't exhibit this behavior, VTEC is disabled to use the low rpm profile across the entire powerband. Of course, the proper scenario would be a custom ground cam for low rpm and high rpm turbo operation, with the VTEC system intact, to maximize power across the entire power band."
"On the Porsche 968 engine (a project I was doing research on recently), the high lift cam profile on the Variocam system (same as VTEC, 2 stage) has to be disabled, otherwise the torque curve drops harsh at higher rpm's. This effect starts happening after around 12psi of pressure."
This may all be complete crap, but I think there is some basis here, and I read about it a long time ago.
omg omg omg just took the ATR for a rip.........omg hahaha foooking insane scary crazy.......!!! hahaha!!
thats how i feel at the mo.
The old NGK Iridium's had died, after may cold starts, mapping etc i came to the conlusion they are faked! So i put some cheap halford / champion plugs in and it started first time!! Today i put some NGK R Plat 7's of a scooby in so i could boost it.
I sorted some wiring inside and just moved parts out of the boot and me and my cousin went out........
The car is a totally different animal now to drive. Under boost she potters around like a normal ATR. The clutch is now a 100% better, and she no longer cuts out on rolling idle, starts first time etc. All niggles seem sorted.
The heat wrap and turbo blanket has worked really well and made a big difference. I will be getting the bonnet vent on and grille cut out asap. Also where the turbo is i need the bonnet rolled alittle.
Errm rear arms / ur arb on this week.
Going to a place to get a intake pipe made so i can mount the HKS mushroom on.
Anyway, what a machine i dont usually get scared but 4th gear is so strong and the constant pull just makes you lift off, you feel like any minute now your going into warp speed.
Crazy crazy crazy car.
And the noise's you just cant explain!!
Im still jumping around!!
thats how i feel at the mo.
The old NGK Iridium's had died, after may cold starts, mapping etc i came to the conlusion they are faked! So i put some cheap halford / champion plugs in and it started first time!! Today i put some NGK R Plat 7's of a scooby in so i could boost it.
I sorted some wiring inside and just moved parts out of the boot and me and my cousin went out........
The car is a totally different animal now to drive. Under boost she potters around like a normal ATR. The clutch is now a 100% better, and she no longer cuts out on rolling idle, starts first time etc. All niggles seem sorted.
The heat wrap and turbo blanket has worked really well and made a big difference. I will be getting the bonnet vent on and grille cut out asap. Also where the turbo is i need the bonnet rolled alittle.
Errm rear arms / ur arb on this week.
Going to a place to get a intake pipe made so i can mount the HKS mushroom on.
Anyway, what a machine i dont usually get scared but 4th gear is so strong and the constant pull just makes you lift off, you feel like any minute now your going into warp speed.
Crazy crazy crazy car.
And the noise's you just cant explain!!
Im still jumping around!!
stuart-b said:
britsportscars said:
Holy st!
That thing's going to be a monster! I'm liking the standard look of it too, should surprise quite a few other cars!!
Might be a noobish question but when you add a Turbo to a VTEC motor, do you need to alter the VTEC system in any way or does it just continue working as normal? I suppose when the VTEC does kick in at 6000 (or whatever) it would be a much bigger kick because of the Turbo?
I remember reading a while back about problems with turbo's and vtec (may be totally wrong here), but some builders even disabled and changed components..t!That thing's going to be a monster! I'm liking the standard look of it too, should surprise quite a few other cars!!
Might be a noobish question but when you add a Turbo to a VTEC motor, do you need to alter the VTEC system in any way or does it just continue working as normal? I suppose when the VTEC does kick in at 6000 (or whatever) it would be a much bigger kick because of the Turbo?
Let me dig a bit...
I found this
"In a low pressure turbo system, the VTEC cam profiles are used to maintain the same torque curve shape as a N/A VTEC engine, only difference is the torque curve is higher. In a high pressure turbo system, the VTEC system is disabled because the high lift cam at high rpms do not work well with high boost. What happens is the valves are still open during compression stroke, so the boosted mixture escapes before the valves close, therefore robbing you of power at high rpms. Since the low rpm cam profile doesn't exhibit this behavior, VTEC is disabled to use the low rpm profile across the entire powerband. Of course, the proper scenario would be a custom ground cam for low rpm and high rpm turbo operation, with the VTEC system intact, to maximize power across the entire power band."
"On the Porsche 968 engine (a project I was doing research on recently), the high lift cam profile on the Variocam system (same as VTEC, 2 stage) has to be disabled, otherwise the torque curve drops harsh at higher rpm's. This effect starts happening after around 12psi of pressure."
This may all be complete crap, but I think there is some basis here, and I read about it a long time ago.
I cant believe that 475hp is so scary.......my mate was right...VTEC+Turbo = one fast insane crazy machine!!
I went out in this "Animal" today it is no longer a car................. There are no words to describe the power !, I have driven a lot of fast cars and currently own a 600bhp Stagea and Trust me when I say that this Accord is like a Rocket Ship !!!......... Needs a Label on the Passenger side of the dash saying "Please wear Nappy as provided " .....lol ....... its is like a Duracell Bunny on Heat in a Watership Down !
Here is a video!!
80mph off boost in 4th to flat out 5th gear. Didnt think it would be possible on my mates private land but it gets there so fast you dont need miles like i previously would have!!
Combined weight of people in the car was 380kg!!
Still pulls like a train and only at 1.1bar..........this car has some serious potential
http://www.youtube.com/watch?v=ZHcSeTwcX24
80mph off boost in 4th to flat out 5th gear. Didnt think it would be possible on my mates private land but it gets there so fast you dont need miles like i previously would have!!
Combined weight of people in the car was 380kg!!
Still pulls like a train and only at 1.1bar..........this car has some serious potential
http://www.youtube.com/watch?v=ZHcSeTwcX24
I've always wanted to know what happens to certain components in cars, that are fully laden (as your video shows), designed to do 120-130mph max.
For example - what happens to the wheel bearings, CV joints, suspension components, hubs, aerodynamics?
Surely pushing 170+ and then braking hard, must cause some serious strain on components not designed for it?
Not a criticism, just really interested, as this is such a high performance car now... potentially very dangerous?...
For example - what happens to the wheel bearings, CV joints, suspension components, hubs, aerodynamics?
Surely pushing 170+ and then braking hard, must cause some serious strain on components not designed for it?
Not a criticism, just really interested, as this is such a high performance car now... potentially very dangerous?...
The ATR does 150mph standard even if it takes a long time to get there.
Suspension has been upgraded with custom spring rates, my brakes are 6 pot 330mm's with huge stopping power.
Alot of Honda parts are extremely over engineered. We've ran standard drive shafts in 600hp Honda's. The S2000 engine can make 800hp on standard internals.
Ive checked the components on the car, and everything is in good order.
Just like doing 180mph in my EVO.
The car is perfectly safe.
Suspension has been upgraded with custom spring rates, my brakes are 6 pot 330mm's with huge stopping power.
Alot of Honda parts are extremely over engineered. We've ran standard drive shafts in 600hp Honda's. The S2000 engine can make 800hp on standard internals.
Ive checked the components on the car, and everything is in good order.
Just like doing 180mph in my EVO.
The car is perfectly safe.
Edited by JayK12 on Friday 31st December 13:12
Ive worked out that it hit around 175mph. But thats it im out of gearing and revs. Could do with a longer 5th gear.
omgus ... hehe so worth the year and 4 months of build.....now i will fettle with it and leave it rough and ready as my weekend toy....ready to much on supercars nom nom nom lol.
omgus ... hehe so worth the year and 4 months of build.....now i will fettle with it and leave it rough and ready as my weekend toy....ready to much on supercars nom nom nom lol.
JayK12 said:
The ATR does 150mph standard even if it takes a long time to get there.
Suspension has been upgraded with custom spring rates, my brakes are 6 pot 330mm's with huge stopping power.
Alot of Honda parts are extremely over engineered. We've ran standard drive shafts in 600hp Honda's. The S2000 engine can make 800hp on standard internals.
Ive checked the components on the car, and everything is in good order.
Just like doing 180mph in my EVO.
The car is perfectly safe.
Sweet Suspension has been upgraded with custom spring rates, my brakes are 6 pot 330mm's with huge stopping power.
Alot of Honda parts are extremely over engineered. We've ran standard drive shafts in 600hp Honda's. The S2000 engine can make 800hp on standard internals.
Ive checked the components on the car, and everything is in good order.
Just like doing 180mph in my EVO.
The car is perfectly safe.
Edited by JayK12 on Friday 31st December 13:12
Im not sure if ive lost the plot or just got a small screw slightly loose.
Im doing a few bits to the car this weekend, and have been in touch with Radtech with regards to making me larger capacity rad as in depth not length or width.
Ive also been looking at other H series gearbox ratios and final drives in tandem with my rev limit. If found a H series gearbox with my rev limit of 8800rpm will be geared to 199mph, but i can increase my rpm limit to 9000 no problem and the gearing will work out at 204mph.
I am trying to get hold of one of these boxes but it might be difficult, the others are geared too long and will hamper acceleration.
Until them i will get abit more power and continue to fettle. Once VMAX dates are released i will get the gearbox in and give it ago.
Not much i can do with regards to aero, i dont want to change the car much with regards to stick on or taking off aero bits.
Will have to get the power right, tyres, weight out, gearbox, half cage incase it goess wrong, and then give it ago i guess!!
Im doing a few bits to the car this weekend, and have been in touch with Radtech with regards to making me larger capacity rad as in depth not length or width.
Ive also been looking at other H series gearbox ratios and final drives in tandem with my rev limit. If found a H series gearbox with my rev limit of 8800rpm will be geared to 199mph, but i can increase my rpm limit to 9000 no problem and the gearing will work out at 204mph.
I am trying to get hold of one of these boxes but it might be difficult, the others are geared too long and will hamper acceleration.
Until them i will get abit more power and continue to fettle. Once VMAX dates are released i will get the gearbox in and give it ago.
Not much i can do with regards to aero, i dont want to change the car much with regards to stick on or taking off aero bits.
Will have to get the power right, tyres, weight out, gearbox, half cage incase it goess wrong, and then give it ago i guess!!
Edited by JayK12 on Thursday 6th January 12:55
JayK12 said:
, half cage incase it goess wrong, and then give it ago i guess!!
You need to talk to Mad Rod for advice on what to do if you are serious about doing it he has the experience in doing these mad 200 mph runs (in a 4 door cossie Sierra).I'm not sure a half cage will be much help to you at those speeds, a parachute and an ejector seat might be more use!
rallycross said:
JayK12 said:
, half cage incase it goess wrong, and then give it ago i guess!!
You need to talk to Mad Rod for advice on what to do if you are serious about doing it he has the experience in doing these mad 200 mph runs (in a 4 door cossie Sierra).I'm not sure a half cage will be much help to you at those speeds, a parachute and an ejector seat might be more use!
Its very stable at 173mph especially when coming off the power onto the brakes, main concern is weight shift. Im not going to go crazy and say im going to get 200mph, im going to do a few bits that i think will help get there or close to that, and then give it ago, if i dont hit it, no problem. Be nice to see what i can get.
Half cage so surrounding the driver, race seat and harnesses, and some huge balls. lol.
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