how to 4valve a s197
- Thread starter 4valvemach
- Start date
not even comparable. Roots SC versus a Centri. Are you looking at peak hp or the entire powerband? Sure the 3v might be off by 10hp, but if the 4v has a more linear powerband, better tq curve, etc. id rather be in the 4v, or vice-a-versa.
Might as well move it to SD now.
10 PSI should be putting down more then 400 rwhp... but if you are going to compare the 3valve and 4valve engines... at least use the same type of supercharger so the results can be shown as similar.
All this 4v vs 3v.......you MORONS!! We all know the 2v is superior.
1v ftw!
Flathead ftw!!
MOVED:wf::wf::bash:
WTF is so damn hard about using the correct fricking forums people?:nonono::nonono::nonono:
The SVTP staff has to move multiple threads every day.
How about turning on your brains before you post.:bored:
was not trying to start a war but the looks of 4v motor alone would make the swap worth it.The question is what would you need to do the swap?how to wire it to make it run ,computer,headers,a/c etc etc.....what parts do you think would be needed
GT500 crate motor $14,999
GT500 PCM and Wiring harness $1,500
8 bolt flywheel $385.00
GT500 exhaust headers and H-Pipe $2,000
I can see you'll be saving a ton of money and still will have no warranty.
After all is said and done you'll probably still get beat by a lighter 3v with a blower or hairdryer and a forged shortblock.
GT500 PCM and Wiring harness $1,500
8 bolt flywheel $385.00
GT500 exhaust headers and H-Pipe $2,000
I can see you'll be saving a ton of money and still will have no warranty.
After all is said and done you'll probably still get beat by a lighter 3v with a blower or hairdryer and a forged shortblock.
WELL SAID :lol:. kenne bell has already done this test , and the 3 valve is just as good , if not better flowing.
IMHO it is not that the 3V heads flow better but that the 3v has VCT which enables the timing to vary with the rpm's.
It has been proven that when the VCT is turned off there is a loss of around 40 rwhp on a car running around 12psi of boost.
There are many people using VCT lockouts or limiters since there have been some cam phazer failures with stiffer valve springs and higher lift cams while others don't.
http://www.livernoismotorsports.com/product.phtml?p=1701
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WTF are you talking about, 3V heads do not flow nearly as well as 4V heads.
What's funny is that I keep reading on all these message boards "3V heads flow nearly as well as 4V heads," or "3V heads outflow 4Vs heads." But the real kicker is that a set of SVO 2V heads outflow 3V heads above .550 lift.
3V heads are down by a good 40 cfm on the intake and 30 cfm on the exhaust side to a set of '03 Cobra heads, and the 4V head outflows the 3V head at every lift point from .050" to beyond .600" lift. With porting the gap only gets bigger.
Funny how one apples to oranges test performed by Kenne Bell turns into the 3V magically responding better to boost. I hope you people do realize that test compared dyno graphs from years apart (tuning is always progressing), the 3V had the superior blower and over a point more compression and still only made the about the same power.
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I am not trying to get in this argument...Just wanting to say that there are a father/son couple on Corral...Dads car has a Whipple, 10.5 psi, 534rwhp...I'll dig up the video, his son's car Procharged H.O. kit made 499, I own an 06 GT, and I am currently working on a 302" stroker for mine, but if it were keeping my stock motor, definitely save some money and go blower or turbo....
Chris
Chris
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