What Engine for 500BHP
Discussion
That's going to be a bit of a handful! 
That doesn't sound like a lot for 500 BHP if you're aiming for a new/fresh engine. I would have thought you could easily spend two or three times that.
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I think you might be right there. Probably use a used engine and rebuild that to save a bit of expense.
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I think you might be right there. Probably use a used engine and rebuild that to save a bit of expense.
Edited by turbonutter on Tuesday 4th October 09:42
I think the Lexus v8 will be a bit big to fit transverse in the back of a stratos, as v6's are a tight fit.
I think a Blown Alfa V6 would be my choice at the moment.
Any one have any experience with having the alfa v6 fitted with a blower? Any recomendations of who to contact about this.
Thanks
Neil
I think a Blown Alfa V6 would be my choice at the moment.
Any one have any experience with having the alfa v6 fitted with a blower? Any recomendations of who to contact about this.
Thanks
Neil
grahambell said:
N
Napiersport who now make the Corse Stratos replica have one with a twin turbo Alfa V6. However, it's also mounted inline and mated to a Porsche transaxle.
Have you even considered the gearbox? 500bhp is a lot of power and few production gearboxes will survive it for long.
And as has already been asked, do you really even need 500bhp? Especially in such a short car?
As Tony Blair will tell you - power is nothing without control.
Anyway, you can contact Napiersport via www.superstratos.com
Napiersport who now make the Corse Stratos replica have one with a twin turbo Alfa V6. However, it's also mounted inline and mated to a Porsche transaxle.
Have you even considered the gearbox? 500bhp is a lot of power and few production gearboxes will survive it for long.
And as has already been asked, do you really even need 500bhp? Especially in such a short car?
As Tony Blair will tell you - power is nothing without control.
Anyway, you can contact Napiersport via www.superstratos.com
I Had a previous Stratos replica with 400-450 BHP also a twin turbo Alfa V6, which is where Napiersport got the idea from, Mine had an alfa 164 gearbox, with a modded bearing, and lasted a reasonable length of time. As it is a road car you dont get to use all the power all the time.
As to do I need 500BHP?? Well I had 400++ before, so thought 500 would be nice to have. I am still in the planning stage, and looking to explore any intresting avenues that arise.
The Napiersport Corse is a nice car, and being the track version a longer wheel base, but probably not the most practical for the road!
Still Thinking of 500BHP transverse, but probably will end up with less.....Hope not though!!
chuntington101 said:
also OEM turbo cars can allways be made to spoll faster. stock jurnal bearing turbos kill spool on small engines turbo cars. ball bearing is a much better solution. even the US V8 guys are getting into it now!
and as you will need a standalone ECU, why not run anti-lag??? hehe
Also to the original question, how about an Alfa V6 with a Rotex,Vortec,ProCharger type supercharger on there?? these will be much kinder to the transmition and should be easier to hadle than a turbos on/off boost delivery???
thanks Chris.
I think thats the way to go, probably the rotex charger, should make it easier to drive than the twin turbo engine i had before!
But The thought of turbo and anti lag apeals to my wicked side
Lexus V8 is a good possibility, will need to check the sizes exactly, if not the V6 is an option. Especially as the MR2 Gearbox will bolt straight on.
We have had lots of good ideas here, The lexus engine with a blower or the alfa v6 with a blower are two good ideas, which should do the job well.
Thanks
Neil
eliot said:
Boosted LS1 said:
Holy thread ressurection batman! There must be a medal for you somewhere in PH towers.
Somebody will be along with witty photographs to celebrate this great occasion
Blimey - doesn't time fly, wouldn't of said that the thread was 2 years old!Somebody will be along with witty photographs to celebrate this great occasion
Good choice btw; reasonable NA displacement with a turbo! How did you arrive at the choice of turbo? and will you be running the engine std or upgrading the intenrals?
There is a question over which AR to use for the turbine housing 0.82AR or 1.02AR. Most likely I will go with .82 as the response will be better. If I find that ultimately it is too small then I can change it relativly easily. I am going with a Tial Stainless Turbine housing for ease of fitment & slightly better gas flow, along with a Tial V44 Waste Gate & tial 50mm BOV.
My budget has also doubled from my initial "hope" to a more realistic 10K+.
Internals I will be using Floged 8:1 CR pistons, machining a grove in the liner tops. I am truing to find out what power the Con rods will take, but havent found out so far. If I cant get confirmation that they are good enough then I had thought to use THS Rods which are good for at least 700BHP.
The engine will have a billet steel flywheel & Tilton Clutch.
It will be january before I start, so the thread will go on for a while! It dosent help that i work away for half of the year!
Neil
Well Things are progressing finally.
I have started on the engine change. The new engine is fitted in the car & I have most of the parts I need.
As I said I am going with the Alfa 3.2 V6.
The engine will be stock apart from 8.5:1 low compression CP pistons & forged rods From THS.
I have a custom flywheel from TTV which weighs in at 3.2 KG. This will be fitted with a Tilton OT-II Ceremetalic twin Plate clutch.
I Have made custom alloy fuel rails & will use 600CC Injectors & a Fuel Lab Fuel Injection Pump & Filters This will take suction from a swirl pot that will be filled with an Aeromotive pump.
The turbo is a GT3582R from Garret with a Stainless Turbine housing A/R 0.82. With Tial's latest 44mm MVR Waste Gate & a Tial 50mm BOV.
Its due to go for the exhaust to be fabricated at the end of next week. This will be made by OJZ engineering.
I am going to use a PWR Charge cooler system with a 7x10 charge cooler & 700x350mm pre rad.
Along with the engine are various other mods to the car & bodywork, so it will take a while to complete.
The main other mod is to upgrade the brakes & to that eng i am fitting 325mm discs at each corner & HI-Spec 4 pot calipers.
Some photos below
I have started on the engine change. The new engine is fitted in the car & I have most of the parts I need.
As I said I am going with the Alfa 3.2 V6.
The engine will be stock apart from 8.5:1 low compression CP pistons & forged rods From THS.
I have a custom flywheel from TTV which weighs in at 3.2 KG. This will be fitted with a Tilton OT-II Ceremetalic twin Plate clutch.
I Have made custom alloy fuel rails & will use 600CC Injectors & a Fuel Lab Fuel Injection Pump & Filters This will take suction from a swirl pot that will be filled with an Aeromotive pump.
The turbo is a GT3582R from Garret with a Stainless Turbine housing A/R 0.82. With Tial's latest 44mm MVR Waste Gate & a Tial 50mm BOV.
Its due to go for the exhaust to be fabricated at the end of next week. This will be made by OJZ engineering.
I am going to use a PWR Charge cooler system with a 7x10 charge cooler & 700x350mm pre rad.
Along with the engine are various other mods to the car & bodywork, so it will take a while to complete.
The main other mod is to upgrade the brakes & to that eng i am fitting 325mm discs at each corner & HI-Spec 4 pot calipers.
Some photos below
Edited by turbonutter on Sunday 8th August 22:07
Thanks Still lots to do as you can see.
The picture with the charge cooler is of a cooler for the gearbox.
I have a 620x350 rad for the charge cooling so 350 SQ Inch. PWR say it will work, infact it is bigger than i should need - if not they will find a solution.
Cooling is with a Davis Craig EWP 115 pump & 25mm pipes.
Charge cooling either seems to work or it dosent, hopefully this one will be one that works. Big Cooler, Big Rad & Big Pump. The rad was made & designed by PWR, so should do the business!
The pre rad was made oversize to cover my main rad fully, to ensure full airflow through both. The fin density was reduced slightly to keep the airflow up for the main rad. The guys at PWR seem to know their stuff but I wont really know until i try it.
It makes for a much easier installation in a stratos, so hopefully it will work well.
The picture with the charge cooler is of a cooler for the gearbox.
I have a 620x350 rad for the charge cooling so 350 SQ Inch. PWR say it will work, infact it is bigger than i should need - if not they will find a solution.
Cooling is with a Davis Craig EWP 115 pump & 25mm pipes.
Charge cooling either seems to work or it dosent, hopefully this one will be one that works. Big Cooler, Big Rad & Big Pump. The rad was made & designed by PWR, so should do the business!
The pre rad was made oversize to cover my main rad fully, to ensure full airflow through both. The fin density was reduced slightly to keep the airflow up for the main rad. The guys at PWR seem to know their stuff but I wont really know until i try it.
It makes for a much easier installation in a stratos, so hopefully it will work well.
Edited by turbonutter on Sunday 8th August 23:25
eliot said:
turbonutter said:
Thanks Still lots to do as you can see.
The picture with the charge cooler is of a cooler for the gearbox.
I have a 620x350 rad for the charge cooling so 350 SQ Inch. PWR say it will work, infact it is bigger than i should need - if not they will find a solution.
Cooling is with a Davis Craig EWP 115 pump & 25mm pipes.
Charge cooling either seems to work or it dosent, hopefully this one will be one that works. Big Cooler, Big Rad & Big Pump. The rad was made & designed by PWR, so should do the business!
The pre rad was made oversize to cover my main rad fully, to ensure full airflow through both. The fin density was reduced slightly to keep the airflow up for the main rad. The guys at PWR seem to know their stuff but I wont really know until i try it.
It makes for a much easier installation in a stratos, so hopefully it will work well.
Glad to hear that the pre-rad is the same size as the main water radiator - sounds about the right size. Listen to the pump for cavitation - they are centrifugal and like a flooded suction. You may need a header tank.The picture with the charge cooler is of a cooler for the gearbox.
I have a 620x350 rad for the charge cooling so 350 SQ Inch. PWR say it will work, infact it is bigger than i should need - if not they will find a solution.
Cooling is with a Davis Craig EWP 115 pump & 25mm pipes.
Charge cooling either seems to work or it dosent, hopefully this one will be one that works. Big Cooler, Big Rad & Big Pump. The rad was made & designed by PWR, so should do the business!
The pre rad was made oversize to cover my main rad fully, to ensure full airflow through both. The fin density was reduced slightly to keep the airflow up for the main rad. The guys at PWR seem to know their stuff but I wont really know until i try it.
It makes for a much easier installation in a stratos, so hopefully it will work well.
Edited by turbonutter on Sunday 8th August 23:25
The pump will be sucking from a swirl pot/headder tank, pumping through the prerad & then through the charge cooler & back to the swirl pot, so It should work Well.
stevieturbo said:
Who's making it ? looks like nice work.
Its been made by OJZ Engineering & yes he does great work. For me he is 5 miles down the road which is very handy. www.ojzengineering.co.ukHis work isnt cheap, but if you want quality you have to pay for it - my system is made from 321 stainless to cope with the heat & that adds to the cost over a normal exhaust.
eliot said:
I was about to say cant you get the turbo closer to the engine, then I remembered its a V6!
That was as close as we could get it and keep everything balanced. I had suggested putting the turbo behind the engine, but then it would have had one short path from the rear bank & a long one from the front.Over the gearbox causes a few issues with keeping the box cool - some good heat shields will be needed, but exhaust wise the headders are all equal length, as is the lenth from each bank to the turbo. The entry into the wastegate is also nicely flowed, as you can see in the photo.
I will post some photos of the finished system.
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