Whats your exhaust temps ?
 

What temps do they usually run .I called merc racing and they said on a 500 efi they see on the dyno as high as 1500 degrees.

What do you think?

I run about 1350-1375 consistantly gut have seen short bursts of 1425 before I pull back.

tt

Less than 1500 is crucial, in the midrange, we run the temps up a little bit to help fuel economy, check the exhaust hoses, as we have had some swell and choke off the water supply.

Steve

anybody else?