IdntGlwIglisten posted in a different forum that a tranny with longer gears stay in boost longer? i wanted to know what other tought or how they feel about this? i currently have a 91 LS with a b16 and decided to keep my LS tranny which has gears for days. i also have the b16 tranny that came with the motor. what do you guys think? shall i keep my LS tranny due to the longer gears? or swap it for the tranny with shorter gears?everyone always seem to have different viwes on everything, so id really like to know how others tought or felt bout the idea, thanks in advance.
set up consists of a first gen b16 with a T3 turbo.
many others have asked me the same question, so i think it be a great opportunity to explore this subject. thanks guys
I have a b18 with the ls tranny, and a T3/T4 60mm trim turbo. By the time I hit full boost in 1st gear Im on the stock rev limit. I was thinking about switching to a ys1 but since my turbo is big it will be harder to stay in boost. You might want to try to advance your exhaust timing to spool up a little faster.
if you have the power to pull the long gears than its better to have the ls tranny , and my all motor ls has enuff power so you can’t go wrong with boost.
Originally posted by caliquick_teg get an LS tranny and raise the rev limiter. nuf said.
:mad:
The rev limit is there for a reason. Unless you have a built bottom end, with an additional fuel supply for the upper revs - then you’d be an idiot to listen to this dumb statement.
The rev limit is there for a reason. Unless you have a built bottom end, with an additional fuel supply for the upper revs - then you’d be an idiot to listen to this dumb statement. [/B]
and if you want to do a turbocharged engine the right way, you’re an idiot NOT to have a built bottom end/upgraded fuel system.
I agree with caliquick_teg. Using a smaller turbo wouldn’t make the situation any better. It’s rediculous how fast a turbo Honda goes through 1st and 2nd gear even with the LS tranny, it woud be a lot worse in more gears with the close gear ratio trannys.
With the LS tranny you can still make a lot of good useful power without raising the rev limter. Then once you can afford the engine management to raise the limiter right you’ll be able to run the car fast enough to run out of gear at 160mph
edit: you’ll also need some better valve springs to run higher RPM
After seeing your car, I was thinking of dropping the whole B16 idea and using a lot of spare DSM parts to make a turbo kit along with a SPS standalone EFI system. I’ll most likely end up using the TD05-14B instead of the T25 in case my brother needs to go back to stock.
My personal opinion on this would be to keep the B16 tranny on the B16 motor. The LS tranny on a vtec motor is defeating the purpose of vtec in my eyes. The beauty about that motor is the gearing in the tranny. They don’t make as much torque as the LS so with a LS tranny it would feel like a dog in day to day regular driving and it would change the motors powerband. The only place you will like it is on the highway. Just my 2 cents.
keep in mind he’s turbocharging, so he doesn’t NEED a shorter-geared transmission…VTEC was originally invented for fuel-efficient power gains, meaning if you stay low you use a lot less fuel (but get a lot less power)…but with a turbo you can make a lot more power lower than you might be able to with vtec. he should be fine with the longer-geared ls tranny.
zoomintegra- You will get the best gains with the vtec tranny with no questions involved. Trannies are torque multipliers so why take more torque away from a motor that doesn’t make much to begin with (compared to the LS). Why don’t you see guys with TypeR’s swap trannies when they go forced induction? Thats simply because it doesn’t make sense to go slower with a motor that needs the gearing in order to make proper hp (gasemileage is not a problem with vtecs). Turbo or N/A, when I was building my motor for turbo they told me to use the B16a tranny that I had on my LS for the best results. This is coming from high profile shops that specailize in this they (they build 9 sec cars in there sleep). The problem you speak of isn’t tranny related its fuel and timing. If you don’t want your motor to light up through the powerband, retard the timing to make it less aggressive . Why kill it? Vtec and non vtec motors run off of two totally different principals. LS motors are torque motors that makes peak power at 6500 -6800rpm were vtec motors make there peak power at 7800 to 8200rpm. LS powerband starts making power from about 3000rpm to redline were the vtec starts making good power at around 5000 to 8200rpm. Go on Honda-tech with your statement you just made in the forced induction board and you will see all the 11sec,10sec and 9sec guys tell you different. No flame intended.
Originally posted by MIKE zoomintegra- You will get the best gains with the vtec tranny with no questions involved. Trannies are torque multipliers so why take more torque away from a motor that doesn’t make much to begin with (compared to the LS). Why don’t you see guys with TypeR’s swap trannies when they go forced induction? Thats simply because it doesn’t make sense to go slower with a motor that needs the gearing in order to make proper hp (gasemileage is not a problem with vtecs). Turbo or N/A, when I was building my motor for turbo they told me to use the B16a tranny that I had on my LS for the best results. This is coming from high profile shops that specailize in this they (they build 9 sec cars in there sleep). The problem you speak of isn’t tranny related its fuel and timing. If you don’t want your motor to light up through the powerband, retard the timing to make it less aggressive . Why kill it? Vtec and non vtec motors run off of two totally different principals. LS motors are torque motors that makes peak power at 6500 -6800rpm were vtec motors make there peak power at 7800 to 8200rpm. LS powerband starts making power from about 3000rpm to redline were the vtec starts making good power at around 5000 to 8200rpm. Go on Honda-tech with your statement you just made in the forced induction board and you will see all the 11sec,10sec and 9sec guys tell you different. No flame intended.
of course, if i were building a car that would be used for full drag-racing only, then hell yeah go with shorter gears. but for a street car, i just don’t see the point in having short gearing to keep you not only higher in the powerband, but when boost comes into play at a lower fuel-efficiency rating. in the end, it’s up to driver preference. i like my ls tranny, not to mention if you’re revving to 8500, it only dips down to like 6k when you shift up.
maybe i should have cleared some things up. O.K.- first of all, i basically live on the highway. I drive 25 miles to and fro for schooling alone and then i drive 120 miles to work and back. Im never on the street really. Now im not looking to make my car into a full on race car. Just tought id get a small edge over freeway freaks. I actually love the way my motor/tranny handle on the highways. i have never actually ran on the strrets to date, most of my running is done on the 5 freeway. Turbo, who doesnt love turbo? so i figured since i had some extra cash, i would customize myself a SMALL trubo kit. i dont care to boost more than 7 psi AT most. my figure was going to be 6 psi, just for the fun of it. when i felt like gettin a lil crazy i figured boost to 7. again, only when im feeling a bit nuts…LOL. so the turbo is just for the fun of having one, nothing more. and since i have access to a b16a trannie, i asked the question, would would be perferred. thanks guys
if you do most of your driving on the highway, why in god’s name would you go with even shorter gears? depending on the transmission designation, you could be upwards of 4700 rpm’s for 70-75 miles per hour.
unless you’ve got a gas hookup, i’d not recommend it…
i dont have a short gear trannie. i have a long geard tranny. im running my LS trannie with a b16a. and i love it on the highway. what i wasnt too clear on was if a short gear trannie was better for turbo, which i now know its not. So im keeping my set up, b16 with LS tranny, t3 turbo at 7 psi, daily driver. nothing to hardcore. thanks guys
