moneyman

Im going to the track tomorrow night and was wondering if it was ok to run in 4 wheel drive? I've practice my launches on the street with it in 4 wheel high and brake torqued to about 1700 rpms and man it launches hard, but Im worried about running 95 mph plus in 4 wheel drive. If I reach down and shift out while going down the track will it still be in 4 wheel high. The reason why I ask is because when practicing the light does go out until I let off the gas even though I shifted out a while ago

KatDiesel

[quote author=moneyman link=board=7;threadid=19953;start=0#msg187656 date=1064248587]
Im going to the track tomorrow night and was wondering if it was ok to run in 4 wheel drive? I've practice my launches on the street with it in 4 wheel high and brake torqued to about 1700 rpms and man it launches hard, but Im worried about running 95 mph plus in 4 wheel drive. If I reach down and shift out while going down the track will it still be in 4 wheel high. The reason why I ask is because when practicing the light does go out until I let off the gas even though I shifted out a while ago
[/quote]


Yes you can run the whole length of the track with it in 4wd.

However I would, pop the lever into 2wd after your into 2nd gear. You can "feel" a difference when doin that vs running the whole way fully engaged.

Better yet why not do one run each way and "Feel" it for yourself?

Something else I should mention, do not go by RPM's when building boost at the line. Watch your boost gauge, and unless you have a billet outputshaft keep it under 20psi on the launch or you'll here a "pop" and you won't be going anywhere because your outputshaft just cried "uncle".

Good luck.

moneyman

Kat

Whats your best 1/4 time?

KatDiesel

[quote author=moneyman link=board=7;threadid=19953;start=0#msg187668 date=1064251088]
Kat

Whats your best 1/4 time?
[/quote]

Haven't been to the track much this year except when my outputshaft cried "uncle" and one other time. I ran 13.5x (would have to look for slip) at Scribner (crappy Nebraska 1/4 mile) this year, but thats with way too much injector and not enough turbo : my "best" I gues s is one of the many 13.4x I ran at KCIR in 2002.

With your setup and a good launch you should be 13.6 to 13.8 I would imagine. 97 to 98mph.


I've been havin more fun on the street then at the track lately.

moneyman

Too many of the other diesels around here know my truck and wont run me anymore. I thought I'd go to the track and surprise a bunch of the "Fast and Furious" crowd. Thanks for the info I definatley don't want to hear anything scream uncle.