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  #46 (permalink)  
Old 03-08-2013, 12:06 PM
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Pontiac stroker "kits" cost in the $1,800 range, plus balancing. Add the forging and it goes up to about $2,200. About the same cost as the BBC and BBD kits, for about the same performance increases. You only need a forging if you're going to make more than 800 HP or rev it past 7,000. We "make up" our own kits for use with small chamber heads, using Icon pistons with an enlarged "dish". Same price...

I don't disagree about using the "numbers" block. 400s are still plentiful, and a "big car" code has no serious value. For the most part, the code is the ONLY difference between 400 blocks of a given year. The "988" block, '71-'75 is the most common and most popular.

FWIW

Jim

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  #47 (permalink)  
Old 11-25-2015, 05:35 PM
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Just wanted to give an update, I've been slacking off,sorry! Car is up and running, in prime though! I ended up buying rods and pistons from butler, I ported the heads, used the same crower cam, degreed and installed straight up, 9.2:1 compression, performer rpm intake, I did the oil restricted lifter bore oil feed mod (pita drilling and tapping all the oil feed holes!), holley 750 dp and edelbrock pump, headers and 2.5" exhaust. Car runs great, no blowby and doesn't burn a drop of oil. I feel that the oil pressure could be better, I did plastiguage it on Assy and everything checks ok per the book, but hot idle is 15 psi after a hi way drive, goes rite to 70 at 1200 rpm. Timing is set at 36 total, 16 base, using a pertronix flamethrower distributor. Performance isn't all that great though, in first gear at wot from 2500 it won't spin the tires, I guess just the way it is,but disappointed. Has a 12 bolt with 3.73 gears. Thanks guys, I think I need to work on it again to try and get more performance
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Old 11-28-2015, 07:40 AM
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It's been a LONG time... Which cam? Crower stuff is pretty dated.

You still have some white elephant parts there... RPM is not the intake of choice. We like Torker 2 for street builds. You may need 800-plus CFM to take advantage of the porting (who did it, what pattern?).

36 degrees is a tad too much for a factory head. We limit them to 34 "total".

Oil pressure indicates "loose" bearing clearances. As long as it ALWAYS makes at least 15 (hot idle, "in gear"), and relieves at 60-70, you're good. It can be a little unsettling.

Jim
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Old 11-29-2015, 05:11 PM
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crower solid pn 60310, duration at .050 is 240 int, 248 exh, lift .477/.501) power is from 2800 to 6k rpm
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Old 11-29-2015, 05:15 PM
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Just got done putting 600 miles on the gto in 4 days, for the Daytona turkey run, didn't skip a beat. Oil pressure hot 2500 rpm is 70 psi, hot idle 25, but in the dead of summer in 95 degrees it will go to 10 to 15 psi hot idle. Carb is a holley 750 dp, but I'm going to try another carb
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