??

 

4th
trap 110mph with 3.42 gears

 

Just shifting to fourth at 109mph w/ stock gears.

 

I'm still in 4th with 4.11 gears, trapping at 107

 

Are you guy's just hitting 4th? Do you think with an HPP a 3rd gear quarter is possible given the extra time in each gear?

 

I tried once and hit the limiter about 20 feet before the line. I would get different valve springs if you raise the rev limit up much.

 

With 4.11's, I'm winding out 4th, not quite at redline yet, but over 5000.

With the 3.42, I was able to keep it in 3rd if I wanted too. I bumped the rev limiter up to 6300 and if I stayed in 3rd, I would "kiss" the rev limiter about the same time the win light came on.

But, I would suggest going into 4th.

 

You're thinking the car will be quicker/trap higher if you hold it in 3rd, avoiding the 3rd shift, right?

Not a good idea. You want to shift to 4th..and you'll have to unless you have a 6500 rpm rev limit. With the stock cam, you would be too far above the power peak at that rpm. Shifting to 4th gets you right up on the power peak through the traps. When I would run mine, I would shift at 6K and I want to say I hit 4th gear around the 1000' mark.

You should try it at the track just to convince yourself, though. Just be safe and don't over-rev the engine..those valves will float and those pushrods will bend.

 

Well between rncotton and you Chris, I think the right conclusion is to shift shift shift into fourth. I was born at night, but not last night baby. I don't have the jing to keep on putting in rods and valves, so fourth it is.

 

I have always had to go to fourth in fourthgens. You might squak through in third, but I don't think it will be any faster. The limiter is bumped on my T/A to 6600, so I though about running it through since it would run 113 in third. Well, I hit the limiter about 10' before the first trap box, bounced all the way through for a 12.7@112.96. I started shirting to fourth and ran a string of 12.6's at 114, and it was a lot easier on the car.