Got a 350 short block here with eagle crank cut 10/10 new bearings for main and rods, new rods, forged domed pistons. with 64cc 2.02 1.95 camel heads. compression is at 10:1 but i have a question regarding my current pistons are they still safe to continue using for like another 6 months? I was putting a 150 shot and i took the system out i wont be using nos anymore. so is it safe to use this motor for another 6 months to a year? as a daily driver and maybe it will see the track every other weekend. has a comp cam magnum 280H cam with comp cam lifters and 1.6 roller rockers. double timing chain. its a flat tappet cam.

 

anyone?

 

Well I would start with your compression is no where near 10 to 1 with those pistons and 64cc heads. It's somewhere in the 12 - 13 to 1 range. Which is probably what caused all that detonation with the nitrous.
I would pull the pistons and check to see if any of the ringlands are crushed or broken. If I had to bet I would say they are. If they're not I guess you can run it like that, but I wouldn't.

 

Are those pistols all the same?

 

Thank but i got some new Keith Black .030 over flat top pistons free of charge from a friend. So i will be having those installed pretty soon. Thanks for the info. What would you recommend for a intake and carb? performer rpm and a 750 holley vacuum secondary?

 

The holley 750 is a big carb. What is the entire setup you could probably use a 600-650 with great success

 

Heres my setup
350 3.48 crank from Eagle forged flat top KB pistons and forged rods arp bolts. Ported and polished heads 64cc 2.02 1.95 valves double springs 1.6 roller rockers. hardened pushrods. magnum 280H cam comp cam solid flat tappet lifters. Crrank journals cut 10. msd ignition with 6al2. edlebrock performer rpm intake. Flat tappet motor. its a 355

 

the 280 is not an overly agressive cam for a street machine.

1.95 exhaust valves?

Still double hump heads?

You can run a 750 but I still think you would be happier with a 650, you may leave 3-5 ponies on the table at high RPM but overall I think you will have a flatter power curve.

 

yes double hump heads not sure if they are 1.95 or smaller Okay 650 holley?

 

If I had to take a guess I would say that if your intakes are 2.02 then your exhaust are 1.6

650 should be good, I see way to many people over carburate and have all sorts of tuning issues.

 

does a 700 cfm or 650 sound better? it can be rejetted and stuff

 

It can be rejeted but not air restricted. So you can have a carb that does not atomize fuel well. I would still say 650. A 650 carb can support over 400hp no problem.

But get what you want.

This is a decent read. A larger carb will only make more power if the engine needs in and with your build and a max of 6000 RPMs I don't think it does.

http://www.chevyhiperformance.com/te...t/viewall.html

But again get what you want.

 

yeah i have this trouble before with a 350 stock i put a 650 and i could never get the mixture right i was always lean. ill stick with the 650. Thanks Midias. my 350 has a small balancer should i upgrade to a bigger one like the ones from a tbi engine? or a balancer with the timing marks on there

 

Take the time and get the one with the timing marks on it. Because you are using a MSD ignition you want to use a static timing light to set your timing and you will want the marks.