pros and cons for running stock valves in 400+ hp turbo engine. Has anybody did it before?

 

i ran stock intake valves with upgraded exhaust valves before but that was more of one time deal but it worked fine. I was talking larry at endyn and he really stated that the intake was going to be fine on a turbo car is usally the exhaust that will see the extreme heat and would need some stainless or coated style valves.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b18bturbo &raquo;</TD></TR><TR><TD CLASS="quote">i ran stock intake valves with upgraded exhaust valves before but that was more of one time deal but it worked fine. I was talking larry at endyn and he really stated that the intake was going to be fine on a turbo car is usally the exhaust that will see the extreme heat and would need some stainless or coated style valves. </TD></TR></TABLE>

this is exactly what I was thinking also. Common sense says that teh exhaust side o fthings ususally is hotter

 

well daily i run around 330whp and on the race gas, i run 500.7whp. The car held up for a week staight and is going strong.

 

I've seen over 400hp on stock valves many times. As long as the tune up is good then you shouldn't have enough heat in there to melt valves. You should know how to tune now, so you're set!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tony1 &raquo;</TD></TR><TR><TD CLASS="quote"> You should know how to tune now, so you're set!</TD></TR></TABLE>
Hopefully, I won't blow my first motor.

 

ay tony montana mang! You ever plan on coming to california? If you ever do, tune my car mang!

(gotta love scarface)

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b18bturbo &raquo;</TD></TR><TR><TD CLASS="quote">i ran stock intake valves with upgraded exhaust valves before but that was more of one time deal but it worked fine. I was talking larry at endyn and he really stated that the intake was going to be fine on a turbo car is usally the exhaust that will see the extreme heat and would need some stainless or coated style valves. </TD></TR></TABLE>

hmmmm....I kinda disagree, there isn't a whole lot of difference if there's any in EGT of NA or Boosted cars. There has been a test run of EGT between NA and boosted cars and at the most are prolly less than 60-80 degrees celcius, not enough to melt any valves.

Highest EGT out of stock NA cars are about 750ish, and boosted cars with avg Lambda are about 780-800 degrees celcius.

stan