No .

There is little if any gain in changing the factory exhaust manifolds on a DE (only worth the investment if you have cams, etc). I have picked up 41.5whp from stock and I trap about 7mph higher.

The highest NA Z 1/8th trap I have seen was 1cockyZ (who makes 305-310whp) was just shy of 85mph. I am thinking this reading is at the 1000' mark. That would put his 1/8th mph around 76-77mph which corresponds to his big end trap much better.

 

yeah man, the 1/8th mile mph must have been off, im the one that was there with the supercharged z going 11's...i sent u a message on ebay, im hoping u or one of ur buddies happened to get me running on video...basically i think the 1/8th mph was off by about 10 mph..i normally trap around 90 and my slip says 100 at the mph1 on the slip, everything else is right on though

 

as far as headers, id say dont waste ur time, id do high flow cats or test pipes, if u get test pipes get resonated ones or they will be raspy, and a cat-back to start...but if u plan to ever boost it go with things u can use in the future, i also am running a motordyne 5/16 plenum spacer that is a great mod for the money imo..

 

would it make sense if this mph was at the 1000ft? what is the 1/8th though as far as feet? maybe ill call lebanon and see what they say about it

 

It doesn't make sense in your case.......you car would pick more than 10mph from the 660' mark to the 1000' mark. It wouldn't make sense that you only gain 10mph in that 340' and another 16mph in the last 320'. It would be the other way around. There sensor must have been damaged or something.

 

yeah must have just been off, cause like i said all my other slips im at around 90mph on the mph1

 

Would have been 13's without the chrome

No way that 85mph is right. Stock is 78-81mph and even 81 is rare. I trapped 84mph down the 1/8 when NA but also trapped 107mph