Need Experienced Turbo Users Help

[TurboLark]

Hi,
Stay with a t-4 flanged housing and preferably with 400 cubes go with a Masterpower 62-1 with a aftermarket .96 housing (or .81 for a faster spool and lower top end revs. You will have to run 18 PSI with a intercooler with a effecency of at least 60% or better. Use a holly 750 as you will flow 744 cfm at the given pressure

If you are going 455
You can also get away with the 62-1 (.96 exaust A/R) as you will only be using 13 psi of boost and it can supply the required 61.7 LBS per min. Use a 850 you will be flowing 840 cfm of air.

As stated above stick with a smaller cam with less duration, as anything bigger really won't be needed.

I would recommend a Tial 44MM wastegate, at the boost levels you will be running with the bigger housings it would be more then big enough.

I am a masterpower / precision/ garret dealer and specialize in custom headers for turbo charger applications. www.bgturbokits.com
www.bgturbokits.com/PICTURES

If there is some intrest I may even advertise here. I was pointed here by one of your board members who told me about your site.
I hope I helped you out a little,
Thanks,
Brian
B&G CUSTOM TURBO FABRICATIONS

Brian, the 62-1 flows around 62 lbs/min right? That would mean that at 600hp he will be maxed out with no room to grow, right?

[my72vette454]

I built a twin turbo setup on my vette last winter and can share a few things with you that I have learned. I used rajay 301e turbos with .8 a/r housings, tial 38mm wastegates and a 50 mm tial bov. I used an aeromotive a1000 pump with a 13204 aeromotive fuel pressure regulator and an old 750 holley dbl pumper that I modified for blowthrough. First off with the .8 housings, I start building boost at 2500 rpm and almost instantly have 12lbs by 3000 or so. I cant turn the boost down past 12 so I am assuming the gates are too small. The bov works great as does the fuel system. I dont have an intercooler on yet but plan on building one for next summer. There is definatly more power in the mornings when the air temps are cooler so I know an intercooler will help. From what I have read from others that have built turbo systems if you arent planning on running more that 10 lbs boost you might not really need an intercooler. You might consider a water/alky injection setup which would probably be cheaper than a cooler and those work good too and take up less room than a cooler would. This was my first experience with forced induction and damn its fun! Good luck with your car.

Mike