How far has everyone pushed their stock head bolts on a 7.3?

woodduck97 · Jan 17, 2012

I'm currently running 300/200's and stock turbo and was wondering what has everyone pushed there head bolts to? Also only see about 32 pounds of boost.

mattman347 · Jan 17, 2012

Running stock head bolts and 238/100's here, just de-tuned.

obspsd · Jan 17, 2012

I ran 238/100s with a 66 for awhile with stock bolts and valve springs, no issues

TURTLE · Jan 17, 2012

I hit 42lbs on a stock charger and head bolts a couple times and nothing ever let loose. not to say it was good for it but nothing happened.

co04cobra · Jan 17, 2012

Ive hit 40+ several times in my 97 with 160/100s. No issues yet.

Groomzybanshee · Jan 17, 2012

250/200s s366 40+ psi with no issues... Motor is conning out as soon as possible for studs though.

imelmo · Jan 17, 2012

I know PTSUPERD ran his for a couple years with a 38R and DI mini-me's and stock headbolts before they finally went out on him.

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Twisted Excursion · Jan 17, 2012

2001 200/30 precision 66 multiple times 40 no issues been like that for 2 years

dietoremain · Jan 17, 2012

40PSI is fine, just dont push it, and oh yeah that stock turbo must hate you.

Short Bus · Jan 17, 2012

dietoremain said:
40PSI is fine, just dont push it, and oh yeah that stock turbo must hate you.

its not the boost pressure people.....

Groomzybanshee · Jan 17, 2012

Bp...

woodduck97 · Jan 17, 2012

Glad to see a few guys stuff holding well... I have maybe ran the truck at it's full potential at a total of 10 minutes in the last year with the few drag races and one pull and some other hot rod accurences. Well I hope money will allow me to get some studs in the truck before Rudy's sled pull so I can feel a little safer.

As for the stock turbo idk how it is holding on being that my orignal stock turbo blew up with just stage ones and less abuse.

mattman347 · Jan 17, 2012

I know its not boost pressure myself, I was more gearing it with the injectors being used.

Powersmoker · Jan 17, 2012

Back about 3.5 years ago...I had a Stock H2E, 230cc A codes, Gen3 Oil and a nice shot of nitrous ( .088 Jet ). It had stock head bolts, valve springs and pushrods. On the juice, it went 12.15 @ 109 Mph and dyno'd 547rwhp. I had this configuration for about 8 months.

I wouldn't recommend doing it, but at the time I was willing to take the risk. I had two spare engines in the garage. The engine later recieved 355cc injectors, Comp 910's, SB P-Rods, Arp Studs and still had no issues. Back in September, I reinstalled the engine back in the truck...with 400/400s and compounds. The engine still runs like a champ, even after I accidently hit 90psi. LOL I love these engines.

PowerstrokeJunkie · Jan 17, 2012

That reminds me, rebuild done and built engine back in?

dietoremain · Jan 18, 2012

Short Bus said:
its not the boost pressure people.....

Yeah but in his case stock turbo backpressure is gonna cause issues.. compared to an aftermarket turbo that creates much less.. stock turbos are okay for what they are but they dont like over 30psi.

CamTom12 · Jan 18, 2012

It's not boost pressure or back pressure, but cylinder pressures.

Some strong stock turbos in here! LOL

woodduck97 · Jan 18, 2012

Well some of the stories make me feel a little better now if I do not get the studs in by March. But I do plan to get it done ASAP. Just trying not to do anything to get the money saved up for new tires, studs, push rods and injector o-rings.