Lol!
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Lol!
that's to funny! :laugh:
What gears you got in that thing? More gear! Sounded like it took a long time to get through first gear and barely into third at quarter mile...
And get someone to video while your driving so we don't loose you! Or you have enough mounts and stuff going on make one for the camera and drive!
lmfao that was some funny stuff!
3.23's in the rear, yea some 3.73's would help. 1st gear was slow because it wasnt up to full bost till about 25mph(3500Rpm)You can see when the boost kicks in. It shifts into 3rd at about 77Mph so it was in that gear for a good 20Mph. Who want to make a trip to ohio and set the lash on some new rear end gears:rockon:
I dont like the way I have to start on the road when testing WOT. Cant practice any type of launch or just a big burnout will accure for a long ways. I have no idea the Hp numbers but i would think the Torq numbers are up there:yikes:
Yea I probly should mount that camera...hmmmm Ill figure something out.
Well if it's going to be a track car you may want to consider a bigger jump in ratio? Also figure what size slick your going to end up running, get Greg to do some math... :laugh: and you should be going through the traps in fourth gear about high RPM! If you want fastest time...
Setting up gears is not to hard, some special tools are required depending on rear axle? Will have to have bearing removed from your posi and measure shims to install new shims and bearings. Look at numbers scribed on pinion gear coming out and pinion gear going in to adjust shims needed there and press on pinion bearing. If your current axle is set up, then new gears can be installed first shot if you do these things.
My 1985 Jimmy weighed around 3000 lbs (looking at stock curb weights and approximating by the weight reduction of lighter heads and other removed parts and parts added, and the 3.73s were too steep for my truck, 3.42s were what I had planned to put in, just never got around to it. I did have a T-5, so I believe I had a steeper 1st gear, but I wouldn't go much more than a 3.73 in your car, unless you really want to rev quite a bit higher at highway speeds.
depending on what size tires you're going to end up with, i also vote no more than 3.73s...
http://efi.moonwell.com/gears.php
i'm a fan of that.
http://www.discounttire.com/dtcs/infoTireMath.dos
and that.
I made this a few years ago. It's not the best out there but I like it because it lets me compare more than one gear/tire/trans combo and puts out driveline rpm - sometimes useful.
Another idea if this has to be highway driven at reasonable RPM and fuel milage would be max RPM through traps in third gear, then there's only 2 shifts as well. At least get all three gears used in quarter mile.
Yes this car is going to driven on the street as well. Its not a full out track car, but still I'd like decent pass times in this car if at all possible. Thanks for the tips guys. I really though of 3.73's but I need a better rear end first. I need to call arround and get a closed rear end. Mines open and the more miles I put on it the more it doesnt even try to make posi. I could make it posi if the conditions were just right...but thats rare!
Right now if id hit the traps at say 100Mph top then my data logs are showing im turning 4900 Rpms in 3rd gear.
So I need to look at a different rear end and then get the gears to fit that series carrier. Any clue on the best thirdgen rear end to get thats a closed rear?? Gears really dont matter since id change them out.
Rear axle upgrade would probably be a thirdgen question! There may be a 12 bolt available? What is in it? With your HP you may be able to build yours with gears and posi/locker and axles?
For my 1/2 ton Suburban it came with 10 bolt but I found a 12 bolt bolt in that is half rebuilt waiting on funds to finish.
Your 10bolt is probably a 7.5" or 7.625" ring gear. That should hold up to what your putting out. when you make another 100 or 200 hp or put slicks on it, then I would think about upgrading. I have a stock 8.5" rear with a Eaton Posi, stock axles, and 400+ hp. I beat on it regularly and have had no problems other then earlier mentioned, which was actually due to the original crosspin and spiders coming apart in the factory open carrier I had before upgrading.
Yea its a lil 7.625" 10 bolt rear.. Im still thinking about the whole drivetrain thing, and im sure if it snaps..then Ill have no choice but to upgrade..LOL