have an opportunity to buy an ITR tranny is it any good with boost or is the gear ratio too close. Searched but couldnt find what i was looking for. the ITR tranny has the LSD which is why im thinking its better thanks

 

I had a b16 with with a b16 tranny with a 4.4 fd and when i was n/a i would cherp fourth. then when i broke the tranny i got an itr tranny with lsd and a 4.4 fd and i could barely get third on the street. now that i have a turbo on it it hardly cherps third on the street. lsd makes a big difference.

 

bump

 

Skip the ITR tranny and put a quaiffe in your B16 trans.

 

Don't go turbo w/ a ITR/b16 geared tranny.

Get a quaiffe'd GSR tranny.

 

Why not boost with an ITR tranny, there are plenty of people who make great power with running and that tranny plus I would not take anything over my itr tranny seems to do real well for boost imo.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by C-speed Racing &raquo;</TD></TR><TR><TD CLASS="quote">Don't go turbo w/ a ITR/b16 geared tranny.

Get a quaiffe'd GSR tranny.</TD></TR></TABLE>

Why, better gear ratio, means faster accelaration.

 

I love the ITR trans, perfect gearing for fun driving. I liked it so much that I bought another stock ITR trans when I wore out the last one..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b16sedan &raquo;</TD></TR><TR><TD CLASS="quote">Skip the ITR tranny and put a quaiffe in your B16 trans.</TD></TR></TABLE>

 

Longer gearing of the GSR tranny lets you stay in boost longer, Less time spent shifting and less traction problems in lower gears.

Unless your only boosting like 7-8 lbs then I guess it doesn't really matter too much.

 

If its a USDM ITR tranny it has the same gears as your 4.4 B16a tranny. If its a JDM ITR 98spec, then it has the bling 4.7FD and shorter gears.

liam

 

here we go again..
man.. this **** has been covered many times.
short gears vs. long gears.
search and u will find **** load of infos..

i went wit ITR trans wit my set up and LSD does help a lot at the track.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by C-speed Racing &raquo;</TD></TR><TR><TD CLASS="quote">Longer gearing of the GSR tranny lets you stay in boost longer, Less time spent shifting and less traction problems in lower gears.

Unless your only boosting like 7-8 lbs then I guess it doesn't really matter too much.</TD></TR></TABLE>

I'm sorry, but that is wrong. Read up, this thread covers it all... http://www.evans-tuning.com/viewtopic.php?t=1496

If your having traction problems get better tires, LSD, staged boost control, traction bars, etc...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by beerbongskickass &raquo;</TD></TR><TR><TD CLASS="quote">

I'm sorry, but that is wrong. Read up, this thread covers it all... http://www.evans-tuning.com/viewtopic.php?t=1496

If your having traction problems get better tires, LSD, staged boost control, traction bars, etc...</TD></TR></TABLE>

Thank you for straightening this out...

 

Im not sure how I was wrong but I do know that putting power through a GSR tranny rather then a B16/ITR tranny would perform better for these reasons:

Less stress on the tranny from less shifting
More time spent in boost rather then shifting
More traction in mid gears (high boosted cars)

Most high hp dyno graphs that I've seen in the last three years have made considerable amounts of boost from about 4500 on up to 9000 in some cases. A b16 tranny is just rediculous on a high HP car.

I can't even believe that Im hearing this...

 

Did you not see that thread I posted?

Well here it is again... http://www.evans-tuning.com/viewtopic.php?t=1496

 

Yeah, the only points I saw made were if you have too much lag use an ITR tranny... and the point below is what really makes me not understand why we're debating this....

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by FROM THAT STUPID LINK YOU POSTED THAT I READ ALL THE WAY THROUGH AND SAW NO NEW INFORMATION &raquo;</TD></TR><TR><TD CLASS="quote">
I have a b16 and that what i plan on using... The way i see it it all depends on the sizing of the turbo, spool time, how many puonds of boost and are able to shift well... <U>I know a guy putting 660 to the ground and he runs high 9s here in Id. and uses a b16 tranny... Granted he does not get any traction down the track, but thats besides the point (he needs bigger slicks) haha.... </U>[/url]</TD></TR></TABLE>

 

The main point is that unless your using a stock LS motor and only revving to 7k the LS tranny is useless.

Here is a quote from BH...

For whats it worth, ever SFWD car that i have seen running in the 9's is using the SI tranny, or SI gearing.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by C-speed Racing &raquo;</TD></TR><TR><TD CLASS="quote">Yeah, the only points I saw made were if you have too much lag use an ITR tranny... and the point below is what really makes me not understand why we're debating this....

</TD></TR></TABLE>

mabye you missed this part:
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by boosted hybrid &raquo;</TD></TR><TR><TD CLASS="quote">Gear ratios are merely a way to trade torque for rpm. With a higher numerical gear ratio, you are putting more rpm at the wheel. With closer gear ratios, you are able to stay at a higher rpm in between shift points. Something like the LS transmissions are suited more towards the broad torque curve/low reving LS engine. It keeps you in the peak torque area in between shifts. The ITR/SI/GSR transmissions keep the rpm's built up in between shifts, to stay in the more peaky powerband.

Having said that, for the track the itr/si tranny is the best hands down. Most high whp turbo engines are operating between 5.5-9k, and having their shift points in between. In combination with a tall slick size (24.5"+), and the high shift point (8.5-9k), you are able to keep the engine operating within the optimum torque curve.

With the LS transmission, between shifts it would possibly drop you out of the optimal powerband and therefore make you slower. Gearing simply put allows you to stay in the powerband of your engine in between shifts.

The myth that you stay in gear longer with the LS transmission makes you faster is purely false. Think about that statement for a second. Acceleration is the measure of velocity over a unit time. Watching the rpms climb on the tach during a 3rd/4th gear pull, they would be climbing slower than with the si/itr tranny. Looking at the definition of acceleration as a measure of velocity over a unit time, the engine would be getting to the same velocity over a slower time lapse. This would yield slower acceleration, and simply put make you slower.

Having said that, the gsr transmission is probably the best balance of a street/strip transmission. The gearing is a little less aggressive as the itr/si transmissions, which will yield a little more traction. For all out acceleration si/itr tranny wins hands down. For a slower car, go with the LS transmission. </TD></TR></TABLE>

 

in somewhat similar comparison, try comparing 5th gear to 4th, punching both at wot at 3.5k rpm, what do you think will get you there faster?? why downshift in the first place, 5th will stay in boost longer, so why not go for that?
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by C-speed Racing &raquo;</TD></TR><TR><TD CLASS="quote">Longer gearing of the GSR tranny lets you stay in boost longer, Less time spent shifting and less traction problems in lower gears.

Unless your only boosting like 7-8 lbs then I guess it doesn't really matter too much.</TD></TR></TABLE>

 

Good thing we were talking about LS trannies and FULL 600 HP race cars.

I almost forgot that everyone has a 9 second car.

 

I thought this had been discussed as preivously stated...fast acceleration means faster acceleration, period.

 

IT has...im sure but the point im trying to make is that if your shifting your not under power and if your tires are slipping then, nothing is pushing/pulling you to make you accelerate faster....

but answer the purpose of the thread...I think thats been covered too. LSD IS BETTER.

 

wow...another tranny war thread.


anyway, b16/ITR trannies do accelerate faster no matter how much power you're making.

i myself prefer the GSR tranny cause i do a lot of highway driving and running straight 3" plumbing with no resonators. not too short, not too long.

and being in boost longer doesn't mean you're going faster...it just means you're putting more load on the motor , kinda like if you were going up hill on a mountain bike or something and switched it to a longer gear, you'd be using more load to pedal the bike up hill while if you had switched to a shorter gear you'd be using less load and accelerating quicker up the hill. hope that clears some things up.