Which tranny for 250whp???

:rockon:

Armed ferret-
[QUOTE=
as for the source of my knowledge? why don’t you ask car manufacturers why they choose short gear ratios over long ones even on boosted applications? why does the 04 cobra have such short gearing, it’s a boosted setup right? what about the 3rd gen RX-7? What about the Cobalt SS (which has shorter gearing than the standard 5-speed Cobalt)? What about the Lingenfelter corvette upgrades which, when you boost it, recommend shorter gears? by your boy’s (worthless) rationale they’re all wrong, and would be better with longer gearing.[/QUOTE]

You never answered the mans question about your own personal experience with these trannies. As he mentioned here.

Quote-Might we also be blessed with the source of your boundless and infallible knowledge? Perhaps you have some dyno charts or time slips to back up your claim that an LS tranny is not the way to go? Or perhaps you just have some threads that YOU read on the Internet, so YOU must know what your talking about. Yea, that?s probably it.

I am not looking at opening a can of worms between us again so relax. If you challenge someones post, it can’t be geared off of what others say, or threads from other peoples testimonies on other boards with their findings. Do you have some personal factual experience on this with these trannies? If so whats your findings?

First off, you didn’t get any reasoning behind my post because you come off as an ass. You attacked me and then couldn’t admit you were wrong. Do not pass go, go directly to the Pay No Mind List.

To contribute to the validity of this thread I still say go with the LS and a lighter flywheel. I say this because with as much power as we are talking about 1st is pretty much a waste no matter how you slice it. Any argument about one tranny giving better traction over the other is silly in any FWD Turbo charged car. If you want better traction get a good LSD and some slicks for the track. Launch control will help also.

The car will rev faster with the lighter flywheel anyway giving the same perception as a shorter geared tranny without the lowering your top speed. I also think you should give a rats ass about this if you plan on driving it on the highway… ever.

Our last project was a b16 hatch with a t3/04, dynoed a touch under 300whp corrected. I would say the only thing I’d have done differently in hindsight was put the LS tranny in it. You go through gear REAL quick and trips on the highway are a killer. Well, that and maybe spent a little less ;-).

Comments from anyone not on the Pay No Mind List are welcome.

Chunk

I was being argumentative for the sake of it. Just being an ass to someone who was being an ass. (IMHO)

I happen to have a B16, with a B16 tranny on it, that’s turbo charged and makes 250+ at the wheels. I can post dyno charts, and can also tell you that I have a lightened flywheel, (never really noticed any difference in anything with that mod to be honest) 1st gear is borderline useless under full throttle (mostly wheel spin unless you lift slightly) I also own an LS tranny, and once the tracks open up around here (still pretty cold in New Mexico) I will be testing with both to see wich provides better times. All my anticks put aside, I think (this is again an opionion so no flaming from certian rodent like creatures please :slight_smile: ) if you’ve got an LS engine and your turboing it, pay close attention to where your boost will kick in and base your transmission on that. If boost won’t be till higher up (like 4k + RPM) I would think you’ld want a shorter geared tranny to get you into boost faster, but if it’s lower (like 3k RPM) this all is dependant on Turbo size, intercooler size, and length and size of charge pipes as well as downpipe, exaust, ect. then stay with your stock tranny.

:corn:

Let me say I pleasantly disagree with your statement about how to choose your tranny selection. Your ideology seems justifiable. But that shouldn’t be the deciding factor of how you choose these trannies. I have tried both a vtec tranny on a non vtec motor and a non vtec tranny on a vtec motor. The vtec tranny belongs on a vtec motor, period. It was designed to enhance the vtec transition. I don’t think I have ever seen anyone with a GSR or TypeR take out their trannies for LS one. Because with a vtec motor there is no benefit with a LS tranny. A LS tranny to a vtec motor is a trade off. The trade off is longer gears at the sacrifice of quicker revs (rpm= hp). People do this because they think they are staying in a gear longer and pulling the powerband further. Which is untrue. Yes your in the gear longer but at a slower rpm climb. On LS motors, vtec gearing makes everything that more lively but there is a trade off aswell. The trade off is higher revs. This engine was not designed to rev over 5000rpm on the highway at low mph in 5th gear. The head (port configuration) and valve train limits this engine, thus its factory rev limiter of 6800rpm. To fully utilize a vtec tranny on a LS motor the head needs to be ported so valve float doesn’t become a issue when surpassing around 7000rpm along with proper valve train so you don’t drop a valve while buzzing it. Along with proper rods or ARP rod bolts on stock rods to handle the extra revs. The reasoning for this is a vtec tranny will peg the tack quickly on a LS motor because of the shortened gears that you have to pull out further to utilize the gearing. LS trannies are designed like LS heads. It tapers off mid range top end compared to the mid range top end of a vtec tranny on the same setup. There is no tranny better than a vtec tranny where 1/4 mile racing is concerned. People might do it for extra traction or better gas mileage, but on a performance stand point the vtec tranny performs better under racing then the LS. Whether or not you can transfer it to the pavement is another story. Sorry to be winded, but that just me

:rockon:

Well I learned quite a bit from your guys arguements. I think I’m just going to go with a B16 tranny with a LS 5th gear. I basically wanted a LS tranny with a light enough flywheel so it would rev like a B16 tranny. But I dont really think that would be very practical so I’ll go with the shorter gears and just throw in a LS 5th gear to save my gas when driving on the highway.

If you can afford to, get rid of the ls tranny. I’m saving up for a b16 tranny.

b16a tranny with LS 5th. anyone who says a LS tranny is better than a b16 for drag racing:

  1. needed better tires when he tried the b16 tranny
  2. never tried one.

I have driven both a g2 with both an LS tranny and a b16 tranny. the one with the ls tranny was LS with a 16g - got slighly better traction and spoolup, but was very slow between sifts and fell outa boost between shifts. the other was B16 with t3/t4e(lots bigger than 16g) spooled 2k slower but STAYED IN BOOST BETWEEN SHIFTS. nuff said. I would NEVER use a LS tranny for anything but long road trips :slight_smile: .

here is my opinion if u have a ls tranny already keep it and play with it, i mean if it already there y junk it, if u dont like it get a b16 tranny and try it.
dont build ur car to someone else’s specs. If u like it and it suits u go with it.
everybody doens’t drive it. My cousin had a 99si i drove it i loved it, I have to ls’s i love them build ur application for your situation. There is no reason we should be arguing over a tranny If u like it its your opinion. I like the ls tranny just like i like the g2 integra over the g3 this is my peferance witch im entitled to just the same with all of you. Cant we all just get along.
Matt
ps sorry for the grammer im tired and its almost 5 in da morning good night!!!
pss. they will both hold up as long as u got a good clutch!!!