im curious whats the maximum horsepower anyone has seen on s4 iron's.im curious because im aiming for 550-600rwhp on my gt42,large port,pinned s4 iron's on c16.

thanx alot
aaron

 

i know there is somebody that has seen some decent dyno's with s4 iron's

 

I dyno'd 500+ on 111 with a street port, and a turbo half that size. A PT67 with a 1.00 split hotside P, or Q trim will easily make that power, and the irons are not a limiting factor. 50 more HP on my set-up (.81 P trim) would be cake for Drag, my car is set-up for road racing, and will be ~480rwhp @ 20 psi. I think there are a few guys over 600 for drag. Carl

 

Im at 480rwhp on my S4 Engine..not pinned nothing fancy...i should be in the mid 500s once i go back to the dyno. the S4 irons are pretty strong, you have anything to worry about.

 

My ears are burning -- yep, the S4 block is plenty strong. It will do the power.

B

 

One PM and both of them show up. Amazing...

 

Look buddy, we don't need your trash here

B

 

Shush before I spray water on you...

 

That's right!! Get back to your job.. water boy!!!

B

 

I broke my rear iron there is a weak spot in the rear iron I was only pushing 280 hp. It is being rebuilt with the iron from an s5

 

ive heard there is a weak spot on the rear iron as well, thats why on the s5 instead of the iron having a 90 degree bend it has a chamfer or a little angle piece for renforcement

 

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I had problems @ 400hp but I did have the stock ecu @ the time, you should be OK , as long as you keep the timing under control.