VH41DE Turbo FGY33 Q45

[IceCubeFoSho]

Since there hasn't been many people that documented turbo'ing their VH41DE engines in the FGY33 Q45, I think I might go for it (depends on Christmas money and how much I put in to the project). A few questions though, what size intercooler should I look for?

Another is when Turbochargers say they're rated for 700whp, does this mean they produce up to 700 additional horsepower, and is this possible if you tune it very well?

Another, is whats the difference between stage I, II, and III Turbochargers, I've seen Stage I kits at 500HP, and Stage II kits at 500HP and Stage III kits at 500HP for pretty much the same price.

When they say I should have Exhaust Manifolds, does this mean I purchase aftermarket ones? Or are the stock ones already of high quality?

Thanks, and wish me luck for now

[darinz]

Turbos are rated in lbs of air and that roughly equates to hp. My turbo is rated to do up to about 850hp ie about 85lbs on air) but I only have about 530hp. But saying that I still have boost at 2000rpm and full boost (10psi) at 3000rpm. I would have gone with something that was flowing about 60lbs as I don't plan on having more than about 600hp. The problem starts when you look at different types as well. A journal bearing turbo will produce the same amount of top end power but will take longer to spool so a bigger turbo will produce more lag. I've a double ball bearing turbo so it is supposed to spool 30% faster than the comparable journel bearing model.So to get the right turbo, you need to know how much power you want, at what revs, what size motor etc. They put the same turbo I have onto 2.0l motors as well and they will produce the same power but they fit a smaller exhuast housing.

Stage I II and III means nothing. It is a way manufacturers compare kits that they make so it is only relevant to the specific kit, engine etc.

A turbo will generally need different manifolds to the factory ones. Beside most factory ones a crap anyway. For a VH you'll have to get them made as I don't know of any avialable.

The biggest peice of advice I can give is do a lot of homework as if you get it wrong you'll spend a lot trying to fix it!

[gs14racer]

Let me start off by saying you need to do a lot of research. I dont think you understand the basic principles of turbo charging.

Start here

http://auto.howstuffworks.com/turbo.htm

this will help too

http://en.wikipedia.org/wiki/Turbocharger

Remember this is a general guide and theres more to it than that.

Also remember that this will be expensive, even if you do the work yourself and buy cheap ebay parts your still looking at close to 3,000 in hardware alone, if you have to pay for someone to do this for you look more towards 5000.

Believe me having built turbo cars in the past i am pretty well versed on this subject.

Hope this helps a bit.

[mtcookson]

This is an excellent read:http://www.turbomustangs.com/turbotech/main.htm

Also check out Maximum Boost by Corky Bell. That is an excellent book on turbo charging.

[qsiguy]

I agree, it sounds like you should do a lot of research before you start buying parts. You're not going to find a kit for your car so you will have to run all the numbers for yourself and figure out what will work and how you are going to do it.

Two of us have done turbos in '94 Q45's. Siju did a front mount which is entirely custom and he did it himself. He's at about $3-4K I think. I went with a rear mount for mine and am also at around $3k and I did all of the fabrication and installation myself. Both of us planned and researched for at least a year before doing much at all.

If you go with a front mount be prepared to do some extensive modifications as it's next to impossible to fit under the hood without mods. I'm not aware of any turbo ready headers either. Siju used his OEM ones and modified them. Even going with a front mount, Siju ended up with quite a bit of pipe before the turbo.

Here are the link to both of our builds in case you haven't came across them yet. The last link is the turbo calculator I put together using the formulas from the Garrett turbo selection tutorials.

Siju's from mount buildhttp://forums.nicoclub.com/zerothread?id=268332

My rear mount buildhttp://forums.nicoclub.com/zerothread?id=281662

My turbo calculatorhttp://www.c4caraudio.com/tech...2.xls

Here's the calculator with my VH45 info plugged in.http://www.c4caraudio.com/tech...l.xls