Hi,
Ok heres my plan. I have a 94 B4C which will have a mild LT1 at the end of the winter and right now im trying to decide on gears. I will have a CC306 cam, ported heads, long tube headers, SPEC stage 3, and full suspention. Im not too worried about gas mileage or anything like that but this car will be my daily driver for a while. I just want some oppinions from people who have both and some performance figures to look at. Thanks for your help.

Jeremy

 

I have the cc 306 and 4.10s.. if i could do it all over again i would still go 4.10s.. The 3.73 arent much different than the 3.42s.. Not in my opinion.. I was riding in my friends car and he had 3.73s and i couldnt even tell.. A4 is a dif. story..


EDIT::: if your getting the cc306 you might wanna change your name from sleeperZ to something else

 

Since you are not worried about gas mileage, and you have a full suspension to help with the traction I would go with the 4.10's. If your car will see track time, go with the 4.10's. If it's gonna mostly be on the street, use 3.73's. But there is no problem with running 4.10's on the street either. That would only be a gas mileage concern.

 

Here's a vote for 4.10's.

 

Great, I was kinda leaning towards 4.10s my self. Anyone have any idea what gear and around what RPM i would be seeing threw the the traps with a 26inch tall tire?

 

4.10s are great, i dont know if id want to put any money in a 10 bolt tho. ive heard of people using solid pinion shims instead of the crush collar, this might help.

 

410's are fun , But you will have a serious traction Issue . I dont know If i would do it over again , I was thinking about 3:73's myself . I posted a local thread asking for their opinion . All I know is that in My LT1 , you could not mash the peddle in first . Lef tthe gear almost useless . The thing would white smoke the tires from a roll@1700 RPM's . Im in the middle o the same thing you are bro . If you do put in the 3:73's let me know how they feel . I have never had the privalige of riding in a 3:73 M6 .
I can tell ya all about A 3:23 M6 though . My 95 had them and it never ran out of gear on the highway .

The MPG will remain the same in the city , maybe even better . On the highway I noticed a big bifference in performance and miles per gallon . It slows it down a little bit on the highway . If your not going to see alot of track time , I dont think I would do the whole 410 thing . But out of the whole , if your car grabs , It will feel Crazy strong .

 

I really dont wanna dump the cash into a 10 bolt but im just wanting to get some mid 12s out of my 94 befor i really get into my main project, which is my 88 IROC/LS1 swap. Im gonna try the solid spacor and see that that does. I also have a Zexel differential to add a little bit of meat to it. I just hope it will last. Im not planning on anything more than a 255/50/16 Drag Radial to ever be bolted to it so i hope it will live.

 

robb4964,

Yeah i know about 3.23s and M6 also. I did my T56 convertion about 3 months ago, and i got a 93 T56 when i thought i was getting a 94, but i actually love this combo. If it wasnt for the weakness of the 2.97 gear set I would keep this combo. It comes out of the hole like a 3.73 geared car but you have the highway fun of the 3.23 car.

 

Well if you had the 93 tranny , you car would feel a bit different then mine . The trannys are geared different so Mine would have ran les RPM's . The 93 tranny was made for 3:23's . Thats what the 93 six speeds came with . Of course I guess you know that I Just like to preach .

 

Not a problem man. It turned about the same Rs on the highway as it did when it was an auto but in 1st out of the whole a freaked out so many people I loved that set up. but now im stuck with 3.23s and a 2.66 tranny so im hurting for gears.

 

My 4.11's worked out almost perfect in the 1/4 mile but I'm a little worried what's going to happen when I get the chance to run in good weather and the high RPM tuning is done. I'm already leary about running the stock bottom end at 6500 RPM, I will not go higher. Larger tires are also not an option since I don't spend enough time at a drag strip with my street car to justify it

You need to decide what RPM you want/need to be at across the finish line and decide based on that... it's that simple!

 

I feel your pain ...My bone stock LT1 ran a 14.1 w/a 2.3 60ft and 3:23's And a M6 Crossed the line in 3rd gear with a few RPM's left .

 

Every little bit helps, and the solid pinion spacers are a must but M6 + traction = busted rear. It's only a matter of time

Why do you think my ET's suck so bad (besides just being a cruddy driver ) I can't afford a "real" rear end yet so I "launch" off idle and nurse it down the track I'm already tearing it down and resetting things before it gets too loose.

 

Why would you nurse it down the track , after the launch , your not going to break that rear end .