How much boost can a stock zetec bottom end handle
Posted: Thu Jul 27, 2006 11:45 pm
I am running a 9 psi supercharger and am wondering how much boost it can take and if there is a HP limit for the stock bottom end. 
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How much boost can a stock zetec bottom end handle
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Posted: Fri Jul 28, 2006 7:08 am
I've hear 12psi is about it, but i have read some shop running more. (C-F-M?) 9psi is safe on it, but more, eh, i'd be leery.
Posted: Fri Jul 28, 2006 11:06 am
How much boost your bottom end isn't going to rely on just the boost level, the PSI is more or less a rating of resistance.
If you have a good tune, you're intercooled, runs a touch rich, you could prob go a lot more boost.
No intercooler, AFR is perfect/touch lean, not much more boost. Excess fuel helps cool down the combustion chambers, thats why some plugs and exhaust ports on boosted motors are sooty, from the excess fuel.
Remember, the bottom end has powered metal rods, they do bend when stressed enough.
If you have a good tune, you're intercooled, runs a touch rich, you could prob go a lot more boost.
No intercooler, AFR is perfect/touch lean, not much more boost. Excess fuel helps cool down the combustion chambers, thats why some plugs and exhaust ports on boosted motors are sooty, from the excess fuel.
Remember, the bottom end has powered metal rods, they do bend when stressed enough.
Posted: Fri Jul 28, 2006 11:22 am
It is 100% up to the tune. There are people running 375 hp on stock internals, but then there are people running 190 and blow up.
Posted: Fri Jul 28, 2006 12:49 pm
Hector @ CFM is running 16lbs with a vortech running a standalone. He hit 12.9 and clocked in at just under 300whp with a ported head. he has a last name too but I can't pronounce it.
Posted: Fri Jul 28, 2006 8:17 pm
trahma wrote: Hector @ CFM is running 16lbs with a vortech running a standalone. He hit 12.9 and clocked in at just under 300whp with a ported head. he has a last name too but I can't type it.
Fixed.
I have heard about that vortech powered car, I was really looking forward to putting a vortech on mine next spring with the ported head
Posted: Fri Jul 28, 2006 10:45 pm
well .......sc0tty8 wrote:trahma wrote:Hector @ CFM is running 16lbs with a vortech running a standalone. He hit 12.9 and clocked in at just under 300whp with a ported head. he has a last name too but I can't type it.
Fixed.
I have heard about that vortech powered car, I was really looking forward to putting a vortech on mine next spring with the ported head
Posted: Fri Jul 28, 2006 11:00 pm
focinite wrote:well .......sc0tty8 wrote:trahma wrote:Hector @ CFM is running 16lbs with a vortech running a standalone. He hit 12.9 and clocked in at just under 300whp with a ported head. he has a last name too but I can't type it.
Fixed.
I have heard about that vortech powered car, I was really looking forward to putting a vortech on mine next spring with the ported head
No more focus for me. That chapter is closed and its time to move on, no more fords but whats in the driveway. I already am on chapter 7 of the tbird book. 1 chapter is enough for me on the focus.
Posted: Fri Jul 28, 2006 11:01 pm
well next year when i get the power works on the svt motor ill have to maybe change yer mind 