ls or b16 trans

[93y7]

i have read alot about which trans to use. i have a turbo ls with a b16 trans. all i do is spin. some say that the ls trans is better for boost. im dynoing it again monday to see where my peak power is because i forget. with the b16 trans somehow at the end of the track i have 4th gear to 7000 rpms and only trapping at 92-94 mph. which trans would be better and why. please dont just say longer gearing because i would like to know why longer gearing is better. i was thinking maybe because when i shift i go down to 5500 and im almost out of peak power

 

[phyregod]

LS has longer gears so you can stay in the boost longer. You'll be slower off the line and to the 60' but your trap speed will jump up quite a bit.

Post your numbers... You should be trapping alot higher. Also, you on slicks? Street tires?

 

[FLounder]

yeah that trap speed is low for boosted...

what kind of 60 ft are you running?

 

[93y7]

radials. i was spinning and got 94 not spinning and got 92. my 60 ft spinning was a 2.5. will i run faster 1/4 time with ls trans?

 

[FLounder]

you should be able to get your 60 ft time down to a 2.2-2.3 with either transmission on street tires. work on your launch some more. i race at moroso with some other guys with integras and everyone can hit 2.2-2.3 regardless of what transmission, and thats not even boosted. i hit 92 mph trap speed with only 160 whp in a 2700lb teg. and my friends bolton gsr hits 95 mph.

just curious, what kind of wheel horsepower do you have?

i think that changing to a LS transmission probably would not change your 1/4 mile et very much. if you had very high horsepower it might make more of a difference. i think traction is the more the issue, compared to staying in boost longer...

 

[93y7]

60 ft 2.5052
330 ft 6.5481
et @594 ft 9.1482
1/8 et 9.7251
1/8 mph 77.98
1/4 et 14.8531
1/4 mph 94.57

 

[93y7]

i think the gearing does it. i full spool by 3000 rpms. i shift and i only go down to 5500 and redline at 7200

 

[CAFROG]

I ran faster then that with an full interior LS swapped EG Si with I/H/E (14.78)
And everyone's right about 2.2-2.3 (2.2 is a very good launch)

So even with a 2.5 60ft....you should be in the low low 14's or high 13's with your set up @ 8lbs

 

[93y7]

the track i went to is notorious for bad times. my friend has a built gsr with b16 head pushing 360 and only ran a 13 8 there. track is very slick

 

[CAFROG]

If its notoriously slick....you should be fine with 8" slicks. Axles should hold up better on a slick track....better then if it was a sticky track
I would at least try finding someone's to borrow or buy used (to see the time difference at least)