Turbo installations
Discussion
www.homemadeturbo.com
If it's an 80's/90's car then look at Janspeed and TurboTechnics as they may have developed a turbo conversion kit for the engine.
If it's an 80's/90's car then look at Janspeed and TurboTechnics as they may have developed a turbo conversion kit for the engine.
I really want to pick someone's brains who has done one from scratch and doesn't mind sharing their expereiences or expaining why they did certain things.
The engine is going in a kit which will explain why I want to do it myself.... but as the engine is a BMW V12 there are limited tuners anyhow.
The engine is a 5.0L V12, 8.8:1cr (std)... I am junking the fuel and ignition and replacing it with a full managment system with a coil per cylinder. I plan for twin turbo's and am having a free flow manifold made. It'll also have a dry sump and twin intercoolers.
Comments, advice, obvious flaws in my plan gratefully accepted.
Rgds
Andy
The engine is going in a kit which will explain why I want to do it myself.... but as the engine is a BMW V12 there are limited tuners anyhow.
The engine is a 5.0L V12, 8.8:1cr (std)... I am junking the fuel and ignition and replacing it with a full managment system with a coil per cylinder. I plan for twin turbo's and am having a free flow manifold made. It'll also have a dry sump and twin intercoolers.
Comments, advice, obvious flaws in my plan gratefully accepted.
Rgds
Andy
I would strongly recommend that you get yourself a copy of Hugh Macinnes book, 'Turbochargers' and a calculator! The book contains lots of info on choosing the correct turbocharger for you application, installation, carburation, intercooling and more, it also has quite a few contact names. It is an American publication, so it covers mainly V8's.
Chris.
Chris.
Andy your biggest nightmare will be the manifolds, you need to made 6 into collectors! Here is a good guide to making them: www.sdsefi.com/techheader.htm
Do you plan to run the engine with standard compression? You could get away with 6-12psi this way providing you use a good intercooler.
Do you plan to run the engine with standard compression? You could get away with 6-12psi this way providing you use a good intercooler.
taz turbo said:
I would strongly recommend that you get yourself a copy of Hugh Macinnes book, 'Turbochargers' and a calculator! The book contains lots of info on choosing the correct turbocharger for you application, installation, carburation, intercooling and more, it also has quite a few contact names. It is an American publication, so it covers mainly V8's.
Chris.
there's another fairly good book on turbo charging and supercharging as well - if I can find out the name I'll post it... if Demon Tweeks stock books they might have it, I know Ripspeed used to have it.
Hi Andy. Get yourself "Maximum Boost" by Corky Bell.Published by MRP (motorsport racing publications)
isbn 1-899870-23-7
Its very good and gives you just about all the info you could ever need, including airflow calculations, intercooler types, efficiency calcs etc etc.
Your CR sounds good at 8.8:1, thats very fractionally lower than the one im using on the golf and with it being that high, it retains off boost driveability.
Just get a good intercooler sorted for it and youll have very few problems with boost levels.
isbn 1-899870-23-7
Its very good and gives you just about all the info you could ever need, including airflow calculations, intercooler types, efficiency calcs etc etc.
Your CR sounds good at 8.8:1, thats very fractionally lower than the one im using on the golf and with it being that high, it retains off boost driveability.
Just get a good intercooler sorted for it and youll have very few problems with boost levels.
Hi,
Im supercharging my Rover V8, using Megasquirt EFI-Ignition, this also controls my water injection. Have a look at my website if your interested,
Phil
www.replica-cobra.co.uk
Im supercharging my Rover V8, using Megasquirt EFI-Ignition, this also controls my water injection. Have a look at my website if your interested,
Phil
www.replica-cobra.co.uk
Thanks a lot guys..... I'll definatelly be buying some books.
I had plan to use std cr and slowly build the boost as the mapping gets better.
My power aims are not that high (400-450bhpish) but I'll take as much as I can reliably.
DINAN the US BMW tuner use std cr (8.8:1) and all std internals and 10psi to get nearly 500bhp and over 540ft'lb torque.
Cheers
Andy
I had plan to use std cr and slowly build the boost as the mapping gets better.
My power aims are not that high (400-450bhpish) but I'll take as much as I can reliably.
DINAN the US BMW tuner use std cr (8.8:1) and all std internals and 10psi to get nearly 500bhp and over 540ft'lb torque.
Cheers
Andy
My understanding is that small blowers would keep the power lower in the power band.....
What I really want is for a power band of about 3500-7000rpm... this will mean raising the std rev limit for the car from 6000rpm due to the std car being an auto only.
Not a problem as I am told they can run to 8500rpm if done right. This is another reason why I went for the shorter stroke BMW V12.
My idea is that my cossie runs a 4pot 2L engine with a T3.4 and I prefer that to when it was 'only' a T3 (with almost same power).
So if I run a T3.4 on each bank thats 6pot 2.5L per turbo it should spin it up even easier.
Thus I hope that as this car will be lighter than the cossie and more than twice the engine off boost it should still be extremelly livelly before lag.
So by running the larger turbo (no more boost though) it will help me move the power band higher..... flawed plan?
What I really want is for a power band of about 3500-7000rpm... this will mean raising the std rev limit for the car from 6000rpm due to the std car being an auto only.
Not a problem as I am told they can run to 8500rpm if done right. This is another reason why I went for the shorter stroke BMW V12.
My idea is that my cossie runs a 4pot 2L engine with a T3.4 and I prefer that to when it was 'only' a T3 (with almost same power).
So if I run a T3.4 on each bank thats 6pot 2.5L per turbo it should spin it up even easier.
Thus I hope that as this car will be lighter than the cossie and more than twice the engine off boost it should still be extremelly livelly before lag.
So by running the larger turbo (no more boost though) it will help me move the power band higher..... flawed plan?
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