How much psi after stroking my engine?

[-86GTStang]

Hi. Bought a T&L built engine, .040 bore 302cid last summer.
After a while, I discovered a crack in the block near the oilfilter.
Rebuildt everything into a 1968 302cid, mustangblock, bored .040 over.
Hopefully, little thicker and stronger block?
After use my engine as a NA this summer, I like to install my P1SC.
My old 302cid setup, made 10,7 psi at 6100rpm/ 520fwhp
How will my stroker engine, 349cid, act compared to my stock one,same pulleys.
Someone told me, approx 8,5psi, because of more cubic inches?

Thanks.

 

[Rick 91GT]

You'll loose a little boost with the increased cubes, but not much... I'd be more concerned about your compression ratio, most flat top 347 combos are over 10:1.
What compression is the new motor? Cam profile has a lot to do with boost as well, there are many variables.

 

[Michael Yount]

Eventually, I'd be concerned about more cracks in the block.

 

[-86GTStang]

Thanks for your input.

Comp ratio is 10:1. I will not run more than 8psi. Dont know so much about the cam, Its custom made for mild boost or nitros, and installed by T&L engines. Could not find any partnumber or brands markt on it.
The guy I bought it from, orded it for mild boost.
Its so gentle and kind, sounds like the stock camshaft , compared to my old trick flow -2000 cam. It shold be aroud .540 ex and int.
Rotating assembly is Eagle forged crank, H-beam rods, Male pistons, ARP all engine, included main journals. Commetic mls gaskets, Dart pro1 heads.
Trick flow track heat lower, upper. C&L 80mm and 42# injectors.
And, yes , not the strongest block in the class. Hope a good tune, and 99-100 octane fuel will make it last for some days.

Did run 12,1 sec / 116,5Mph, 1,665 60ft last weekend, raceweight 3550lbs


Clip from our Norwegian Mustang club Bracket racing event,red -86GT :
YouTube - Mustang Speed Week 2010, finale bracket og badboys.

 

[madspeed]

Hey man, you've got a NICE CRACK!