How much boost
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New User
Joined: Aug 2009
Posts: 14
Likes: 0
How much boost
I have a 87 ford f-250 with a 6.9. It has a banks sidewinder turbo and i was wondering what would be a safe amount of boost without replacing head bolts with head studs. right now its boosting around 7-8psi.
Lead Driver
Joined: Apr 2008
Posts: 6,938
Likes: 13
10 is about the most you should go. Buut... the banks is non wastedgated. So you only get what you get. You can eek a little more out of it with injectors and bumping the pump up a smidge. A good exaust goes a long ways too.
Post Fiend
Joined: Nov 2003
Posts: 21,285
Likes: 15
From: Nutter Fort, WV
10 should leave you a little safety margin.
I ran 15 on stock head bolts, but when I pulled the heads you could see where the fire rings were seeping on all the cylinders.
I have no doubt failure was not far in the future running that much boost.
I ran 15 on stock head bolts, but when I pulled the heads you could see where the fire rings were seeping on all the cylinders.
I have no doubt failure was not far in the future running that much boost.
