A/R vs wheel size

[1dollardog]

In researching some turbos I've seen certain ar's with different wheel size. For example I've seen AR .82 with a certain size wheel on one turbo and a different turbo with AR .82 with a different size wheel. In shopping for a turbo, what is more important to look for, AR size or wheel size? School me please.

 

[1dollardog]

anybody?

 

[slimtastic]

In researching some turbos I've seen certain ar's with different wheel size. For example I've seen AR .82 with a certain size wheel on one turbo and a different turbo with AR .82 with a different size wheel. In shopping for a turbo, what is more important to look for, AR size or wheel size? School me please.

well the first, a few main things need to be know about your setup.
first, whats your hp goal for the motor?
second, what stall converter and how high can you get it?

 

[1dollardog]

well the first, a few main things need to be know about your setup.
first, whats your hp goal for the motor?
second, what stall converter and how high can you get it?

I'm needing some basic knowledge on the subject. My set up is very different than most. Its in my sig. My spool is very s-l-o-w with the twins and using 2 stock turbos however after 3500 or so she really takes off and climbs to the moon. I'm shifting at around 5k in 2nd and 3rd. I feel that the twin set up really has more on the top end than I need. There is "air to spare" well above 55 rpm or so. Thats all I have pushed it to so far. My stall is 2200 and I'm going to move up to a 3000. I don't think I want to move above that. I'd rather find a turbo combo that would spool that low. I need more streetability. As far as hp goals I want to push the stock long block as far as I can without going too far. I'm hoping for the 450-500 hp range.

 

[slimtastic]

remote turbos on a buick??....im gonna need pics or it never happened lol. what are you using to judge rpm? if its the stock tach then youll need to get an aftermarket one for an accurate judgment of what stall you need. if you want a good spooling turbo then id start with this turbo in either the stock 84 location or convert to 86-87 headers/intake

Precision Turbo and Engine: Street and Race Turbocharger - PT5757

then at any rate if you decided to put a stall in, you can do the bare minimum for stall speed like a super tight 2800 or the like.

are your stock twins really near the trunk?

 

[charlief1]

remote turbos on a buick??....im gonna need pics or it never happened lol. what are you using to judge rpm? if its the stock tach then youll need to get an aftermarket one for an accurate judgment of what stall you need. if you want a good spooling turbo then id start with this turbo in either the stock 84 location or convert to 86-87 headers/intake

Precision Turbo and Engine: Street and Race Turbocharger - PT5757

then at any rate if you decided to put a stall in, you can do the bare minimum for stall speed like a super tight 2800 or the like.

are your stock twins really near the trunk?

He posted all of it in the HA section Slim. It really is a twin remote car.:biggrin:

 

[slimtastic]

ahh i see(just did a search) in that case youd prolly need to step down in turbine size quite a bit as the main problem with your setup is the distance to charge the exhaust pipe and the distance to charge the intake pipe.

twin turbos out that far from the motor will need a turbo closer to this
TurboByGarrett.com - Catalog

your spool should be great wih a stock to 2800 stall and two of those turbos will support what you want out of the car

 

[1dollardog]

ahh i see(just did a search) in that case youd prolly need to step down in turbine size quite a bit as the main problem with your setup is the distance to charge the exhaust pipe and the distance to charge the intake pipe.

twin turbos out that far from the motor will need a turbo closer to this
TurboByGarrett.com - Catalog

your spool should be great wih a stock to 2800 stall and two of those turbos will support what you want out of the car

Thanks. That is exactly the info I needed. I've been doing some research on what would work well with a 1.9 litre engine and multiplying that times 2 = our 3.8. Basically the exhaust from one bank of a 3.8 is the equivelant to 1.9 litres in my eyes. Unfortunately I've had to stroll through a bunch of Honda forum BS in my search.