Fobra

haha, the internet is a wonderful thing... btw there are other compelling reasons to run a 3v heads, other than the fact that they practically match 4v cfms... but ill let you figure that one out since your the expert

Im still undecided on the lighting thing tho, it seems to be a drivers race, from what I can gather 13.7-14.5 seems to be the stock 1/4 time range... I stand by what I said, Ive been lightings, seen em get beat to, and Ive seen them win... but nobody seems to be able to get some real 1/4 slips together for me

72MachOne99GT

Threads like this always get so screwed up when people start talking about what happens on the street.

We all know something crazy can happen on the street, so there is NO NEED to point out that driver plays a huge part in it. Duh, the car does not drive itself, we know now that a driver can play a huge factor.

A normal s197 GT should be in the 13.6-13.8 range. Of course there are exceptions, but that's an average. At the EXACT same driver skill, a 99-04GT should be running 14.1-14.3 or so.

That's a healthy half second give or take a small margin.

I've gone 13.8@101 with 4.10's, o/r H, catback, and a 2.0 60', but I would not expect to beat ANY 5sp/auto S197 I pulled up next to at the street or the strip.

gs462

What besides the 3 valve head are the major differences, in the 05+ to the 99-04 4.6 motor?? are the heads etc interchangable??

BraMas

holy 4yr old thread. You get an A for using search but a big fat F for replying to a dead thread.
Yes the 3 valve heads bolt on to a 4.6 block but you need alot more than just the heads to do the swap. Most people just swap the whole 3V engine

gs462

Hey I searched didn't want anyones panties in a bunch, I guess Ill just do what the wife says leave it alone its hers and its fast enough. LOL