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Old 03-25-05, 06:58 PM
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Re: The "4.9 liter turbocharger, stage 1" thread.

Quote:
Originally Posted by N0DIH
With nothing more than a stock 301 Pontiac(with beefy block), a mild .350 lift cam, 250 gross duration, crappy crappy heads with 1.75in/1.5in valves, a very poor designed turbo compressor outlet, a way too small turbo, 2.25in single exhaust, a total of 24 degrees mech timing, a 800 CFM Q-jet , and a old pellet tpe catalytic could make 210 hp. And with minor mods (K&N, but stock ar cleaner), upped timing (mech and initial) and cat removed, (yes, a pellet type) cold make 290 rear wheel hp with only 7.5 psi boost, imagine what can happen to a properly setup Cadillac 300 CID V8?!?!?!?

Heck, even an improperly one can make 300 hp easy!!!

Turbos respond to mods very well, sorta like a multiplier not just an adder!

Tom
Of course there are those naysayers that will tell me that I should just pucker up and buy a mid-'90's Vette and be done with it...I will promptly tell them to bite me...

Yup. I think with 6 psi I can see around 75 hp, particularly on the top end power band, which is where the 4.9 will need it. I am probably going to get an intercooler from Stoney, but I would prefer to have some measuements before I shell out any cash on shipping.

The only thing about the intercooler that he has is it seems to be a tad small. But in all honesty, smaller is better than nothing. And from what I understand, if you run too small of an intercooler, it will lower boost levels...N0DIH, is that true? If this is the case, I would think that would be good to controll boost with the particular turbocharger I am using.

If I need more boost, a mechanical boost controller can do the trick at around $25.00...Just dial in the regulator and go. I wish it would be able to lower boost, but from what I understand, I will need an external wastegate to do that. The device I am goinmg to order just increases it due to the fixed nature of the stock Warner-Ishi wastegate...If you know of another way to controll boost cheap (as in lower it), let me know.