So I was lucky enough to sneak out to a track rental-more on that later. I learned that I NEED more gear! All I was going was shifting...losing a ton of ET and MPH between constant shifting and waiting to get back into the power band. Car was going though the traps tickling the limited in 5th gear!! :banghead:

Looks like stock explorers use anywhere from 3.27 to 4.10 gears stock-and stock=cheap so that's all me! I'd like to be able to go through the traps in 4th gear-and have my rev limit be my only limiting factor for mph.

With a stock T56, this gets me to 154mph@6500, and 162mph @7000 which should work out once I put springs and a cam in the motor. So, my question is

1) How hard is it to find a stock 3.27 expoder rear gear (and hopefully LSD)

2) Who has a 3.27, and how is it on the street? I know from previos turbo car builds that lower gear leads to better ET/Traps since I can keep the car int he power band longer, but want to avoid the move to Auto because the car is mostly street driven and I don't want to lose my man pedal!

 

With a 26" tire and 4.11 final drive in the rear you'd hit 165 MPH at 6500RPM in 5th gear...Only 122mph in 4th gear though.

What size tire are you running now and what was your trap speed? This is in an F-body right?

 

Check www.corral.net classified.

http://forums.corral.net/forums/drivetrain-parts/

 

No, Ls1 Rx7.

https://ls1tech.com/forums/forced-in...hp-record.html

And I dont want to get into 5th at all! Car is lazy coming back in to boost, gear is weaker, its another shift I don't have to make....ect. Also, the longer gear will keep me in the power band longer, which in my experience will make the car faster on track.


Thanks.

Also found a ton at local junkyards for cheap.

 

That changes things then, I was going to be surprised if you were trapping that high in a heavy f-body. That gear ratio makes a little more sense now. Still though, a bigger tire could help as well, if you can fit it.

 

Biggest without a ton of work would be a 28x9 or 10, but that does not net me any gain really-still have to go into 5th.


Does any car come stock with a T-56 and a 3.27? Just looking for a base of comparison.

 

The only T-56 cars I can find trapping in the realm of what I'd like to eventually see-and none of them go into 5th!!








I mean even the V160 cars are not going into 5th! But, they can rev to the moon if need be




BRB-going to junkyard for a $50 Explorer rear end upgrade...

 

What tyre ? and do you have the power to trap 150+ in the first place ? A 26" tyre and 3.27 should in theory get you close to 160mph at 7000rpm.

Ford Racing sell 3.27 CWP's for very cheap http://www.summitracing.com/int/part...8327/overview/

As for street, no problem with it at all. 3.55 is a little nicer I'll admit, more so for 6th gear and driving off from standstill, but the 3.27 is perfectly fine.
6th sees me around 1600rpm at 70mph which is great

I've swapped between 3.55 and 3.27 a couple of times, but stuck with the 3.27 for top end ability as it lets me do 200+ in 5th, whereas I'd never be able to hit 200mph with the 3.55

 

Currently on a 26' and really want to keep it there as its the same height as my street tire.
I certainly hope so! Car makes 700+whp@15psi, and 850@21psi and weights around 3k lbs still at 100% full weight. She needs a diet, but its still lighter than most. Also this is on a stock LS1, so I am planning to make more with a different engine package int he future.

I've swapped between 3.55 and 3.27 a couple of times, but stuck with the 3.27 for top end ability as it lets me do 200+ in 5th, whereas I'd never be able to hit 200mph with the 3.55[/QUOTE]

Thats great to hear! I'd like the car to be set up well for 1/2 mile and mile racing as well, so the 3.27 seems to fit the bill. I may consider a 3.55 or higher is the car is a dog on the road course, but I will admit its a straight line car first, road course car second. I'd still like for it to be well rounded though as I enjoy both forms of racing.

 

For 1/2 mile the 3.55 might probably be slightly better, but then for the 1/4 unless you have a lot of rpm's available, it may leave you slightly shy

26" tyre near 7000rpm with the 3.55 left me at 149mph back in 2006 or so.

After I did the 9s runs a year or two later, I've never actually been back to a proper drag strip, as was more interested in trying for the 200mph mile.

I'd now like to hit 200mph in 1km as there's a yearly event I go to that now races that distance. That'd probably be around 190+ in 1/2 mile


I think around 06/07 I went from 3.55 to 3.27 then back again. It didnt seem to make any real difference to ET's or traps at that time, obviously didnt have any power to pull extra speed anyway despite the taller gear.

I dont see how the car could possibly be a dog on the road course with either 3.55 or 3.27 if you are genuinely making any decent power.
I have far too much power everywhere ( relative to grip available ) unless I keep the boost right down for anything road, airfield etc

 

Thats where I'm at. I just don't want to have to go into 5th, even if the car is approaching 160 mph traps.