I am in the process of rebuilding my engine to run with a weiand 6-71 blower. I plan on using forged pistons and a pair of airflow research heads with 76cc combustion chambers.
(static compression around 8.1/1) And of course stainless steel one piece valves and dual springs. I would like to know what you guys think about cranks and rods. Should I use the stock cast stuff, or would it be better to buy 6.0 inch forged rods and a forged 400 crank to make a 383 stroker.
The forged crank and rods will cost about 1500 dollars. Do you think its worth it?
Will cast components hold up to the 600 or so horsepower? Will a 383 make that much more power?
I could also use any ideas you guys have about my transmission (700R4 with a shift kit). Can it handle the power, or should I just buy a racing prepared TH350?

Thanks

 

Yes. Go with the forged stuff. The day will come when you will want more power and you will hate life if you install the blower, make one pass and have to rebuild it.

Yes. How long? Who knows. I would check with Scat. They have a "cast steel" crank and rod setup that will hold up to 600 HP reliably. As far as pistons go, stay away from those "hyper-u-doo doo" pistons. They are only good for normally aspirated applications, IMO. Get a good set of forged pistons from JE, ROSS, WISECO, LUNATI, etc.

I'll say this. If you want to keep the OD, I would call Art Carr or one of those other tranny companies and ask about the 200R4. They seem to stand up to those 10 second Grand Nationals pretty well. Or call YANK TRANSMISSIONS. They make a tranny called the 4L70. Supposed to handle 700 lb/ft of torque (I think).

Good luck.

[This message has been edited by JAYDUBB (edited August 05, 2001).]

 

i would go with forged pistons for sure, i think its up to you if you want a forged crank or not.. i would go w/one. as for rods, keep the stock ones. have them checked, and if they are ok then keep them.. i've read in more than a few articles and supercharging books that stock rods are fine

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83 Z28--not a pretty site, sold thank goodness

74 Z28-- 383/400, green on black. pretty clean. FOR SALE!!!