i am an automatic maxima. i hate how you 5speeds are so much faster than i, although i must admit my car ran a 15.6 wich is pretty good, but i really want to break into 14's and that is usually hard with an auto. i was thinking about the VB mod and i was told it makes the auto tranny have quicker shifts so its just like a manual. but how come the auto with VBmod is still no where near where the 5speed is if it makes the auto shift just as well. i know theres like a 84lb weight difference but the math still doesnt add up right.. im confused??????????

 

Do a search

 

It has to do with the fact that auto's only have 4 speeds (actually 3 + TC lockout) and manuals have 5. It's all about the physics, but since I hate math I'll let someone else explain it to you.

 

I agree with Jeff 100%...

But because I know this area , no the VB mod will not improve your times at all. It simply strengthens your transmission. If you want you auto to shift as quickly as a 5spd, you need a complete transmission rebuild from Level10 (or Don if he does them). It normally costs around $4k, over twice the price of a 5spd conversion, which is why many people don't have them. However I do believe Don did, and keep in mind he is one of if not the fastest Maximas around.
-Cyrus

 

for one, the gear ratio on an auto is taller compared to a 5spd, resulting in slower revs, there is a thread that shows the gear ratios for autos and manuals. also, autos are not as efficient as manuals. the torque conveter robs power... about 17%-20% while a 5spd loses about 12%-15%... mind you these are not exact, but close. so, along with the extra weigh of an auto, the gear ratio and efficiency are responsible for the decrease performance.

 

so would i be wasting money if i put on a VBmod to lower my 1/4 mile times??

 

Well if you're going to drag your Maxima then it's not a waste of money because it strengthens your extremely weak Valve Body. No, it won't help your times, but it'll help keep your car running.
-Cyrus

 

Doesn't Don sell a better TQ converter with the VB mod?

 

[quote]The VB mod will not improve your times at all. It simply strengthens your transmission. If you want you auto to shift as quickly as a 5spd, you need a complete transmission rebuild from Level10 (or Don if he does them). It normally costs around $4k, over twice the price of a 5spd conversion, which is why many people don't have them. However I do believe Don did, and keep in mind he is one of if not the fastest Maximas around.[quote]

Yes, you would be wasting your money.