What's a normal PSI for boost? Like on a stock 250 with a turbo, wastegate, and methanol injection? I saw a guy run a 250 with 5psi of boost and I think he got like 360hp and about 300 ft/lbs and then I saw a nova run with 16psi of boost and he got 390hp with 401 ft/lbs. If I just had a stock setup with just normal performance upgrades: cam, lifters, springs, intake, exhaust, carb, and turbo, what'd be a good boost for fair longevity and good performance?
For what your are doing 5-7 psi tops boost pressure.
Your set-up will not make that much HP, but it will make mucho torque,Torque is what you feel move your car ,sort to speak.
You can make 200-260 HP on an engine dyno pretty easy.
Don't need to change the cam,but if you decide to go bigger,just go up to about 200-204 degrees duration @ .050 on a 114-116 lobe center.
Comp cams will make what ever grind you desire.
As far as turbos go,I think you are on a budget & might go w/a used turbo?
If that's the case.
A stock Syclone or Typhoon turbo would be a good size & has a water cooled center section. Or a Buick Grand National 1986-1987 stock turbo.
The Sy/Ty turbos are made by Mitsubishi & the parts are more pricey than the Buick Regal turbos.
Also as a side note there A/R on the turbine housings are nowhere near a .96 which is what was used on a 250 engine dyno.
Don't fall for the "Hype that is a perfect size for a stock 250 that you have basically.
If you do fall for it,you will only be very dissapointed in the streetabilty & poor turbo spool up,,,even w/a manual trans.
Bosanova used a stock modified intake & a stock modified exhaust manifold, pretty clever.
Here is the link
https://www.inliners.org/ubbthreads/ubbthreads.php?ubb=showflat&Number=51198&fpart=6You can also use the stock manifold & run the exhaust pipe up to the turbo wherever you want to place it.
Probably the easyiest,buy a complete draw through turbo set-up from a Turbo trams Am w/a 301 CI V-8
Or the older Buick regals 1978-1980 something.
Post # 188
has a couple pics of the turbo.
http://www.turbobuick.com/forums/before-...ed-equal-6.htmlMore from the same topic
http://www.turbobuick.com/forums/before-...ed-equal-2.htmlMBHD
