12 PSI on a stock 5.0?

[Redsnake2]

How long do you think it will take to lift the heads.. As long as i don't run it like that all the time it should be cool for a few good highway sprints..

What do you guys think?

 

[sage2k]

see: http://forums.stangnet.com/showthread.php?t=730022

lol perfect timing for this post

 

[94gsl5.0]

It took 14#'s to lift the heads on my bone stock long block with an s-Trim.

Studs/Cometics and bone stock cast iron heads held up to non-intercooled 16#'s bouncing of the rev limiter several times.

 

[FlyBy763]

Mine hits 11 @ WOT and I havent had a problem yet.

 

[PUNISHER RACING]

12 psi on the black car just because it went lean (only had 24's and stock pump)

 

[BlackPearl955.0]

12-14# as a conservative tune should be fine. but that will even take its toll. It will still be a time bomb, any more boost is just shortening the fuse. a blown head gasket is probably be the only warning and should be easy to spot from the frothy skeet that will be bubbling out.

 

[turbogt]

I'm running 10# pretty hard right now with no problems.. I would run more but I need bigger injectors.. I would run 12 without worrying at all..

 

[Stanger007]

I'm right at 14# and lifted heads at 21* spark, 11:7 commanded AFR. Never heard detonation, just ran slightly hotter than normal and overflow bottle was full, track times were slower.

Ran 12.3 with good head gasket, 12.6-12.49 with the bad ones, laid down a little up top when I got to high boost. Never heard detonation. Car has at least 30-40 WOT runs on it w/ the S-trim at 18*. About 10 runs with the higher spark before the gasket went.

This was on 137k mi virgin stock longblock.

If you are concerned about keeping it safe, I wouldn't go much over 12# and 11.5:1 @ 18deg total.

Wes

 

[gmkillr]

The #'s in my sig were made on 14lbs. and I was lifting the heads, and this was with ARP head bolts.
Now I run ARP studs w/ 20+ psi of boost and have no head lifting issues or no new dyno or track #'s
But come spring time, I will....