HELP,HELP pontiac gurus
 

Want to run a .040 over 400 pontiac72-7500 rpm.

stock 68 400 crank, 63 421 sd reconditioned rods, .040 10:5 trw pistons 68 pontiac 400 heads comp. valve job with 1.65 harlan sharp rockers offenhauser low rise 2 4 bbl. manifold with 2 625 afbs, .600 lift 270 duration flat tappet cam, jackson gear drive, ati balancer, freshened mallory super mag circa 1970, butler valley support. 93 octane pump gas???

will my junk live to 7500 rpm,, have had bbcs,sbcs, 426 hemis, but never a poncho and have not a clue

craig esposito
sagarth.espo@gmail.com

Re: HELP,HELP pontiac gurus
 

All of the Pontiac people/racers I know, talk low rpm torque, not 7500.
Looking forward to other replies.
Good luck with your project.

Mike A114

Re: HELP,HELP pontiac gurus
 

"will my junk live to 7500 rpm"


NO !

Re: HELP,HELP pontiac gurus
 

Heavy pistons , need a better connecting rod . You must have pretty decent heads if you are winging that engine to 7500 . Its possible !

Re: HELP,HELP pontiac gurus
 

Yes, you can build a Pontiac 400 that will do 7500. But the parts you listed will likely not get you there.

I'm thinking a lighter piston, Lighter 326 or 350 crank, Way better intake. A Professional port and valve job. and a roller cam would be nice.

Spinning 7500 and making power at 7500 are 2 different things.

Re: HELP,HELP pontiac gurus
 

What I remember of Pontiac's from when I had one was CAST connecting rods, not Forged. But the SD rods, I don't know. Looks like Scat and Eagle make forged rods for it.

Re: HELP,HELP pontiac gurus
 

The SD rods are forged , but the early ones still had 3/8" bolts , the 73/74 SD rods had 7/16" bolts , most of the aftermarket rods have 7/16" cap screws .

Re: HELP,HELP pontiac gurus
 

What are you guys doing in my garage. :-)

Do NOT even attempt this. It's taken me a long time to find out what works, what lives, and how high of rpm I can go SAFELY.

You tell me the car, the race weight and the ET you'd like. Get that 7500 rpm stuff outa your head. That's not a smart way to approach a project.

And spend $300 bucks on some chinese rods which are way stronger than any factory rod made. I hate it too. (Off shore stuff) But 98% of my customers act like they're dead axx broke, but want the double throw down massive hp. So they get the rod that's very good, and cheap.

Re: HELP,HELP pontiac gurus
 

UGGGH!!! ok so I can not wring this motor where I want to. Bought a set of Molnar rods so maybe it will live @6200-6400 rpm. It is a street car with a pro-shift nash 5 speed but I like shifting at 7000+ rpm ,looks like I will have to learn to shift at 6200. non-tubbed car will be fun trying to hook up this
torque monster using 1972 technology. Extended lakewood slappers and a decent adj. shock, 9 or 10 inch tires. Doing a street-strip car like we had in 1972. Frame connectors but no cage.

Re: HELP,HELP pontiac gurus
 

anybody that wants to b.s. and tell me i'm a moron give me a call

especially bruce fulper

330 831 4480 anytime