DA TeG 90

I have a GSR 1.7 and plan to make 400+ on pump gas with my set up. With the gearing being short on the b17 tranny I was wondering If I should keep my current tranny and add a LS 5th gear or just switch right over to an LS tranny with LSD? I have heard good/bad things about both. I have heard that the LS tranny keeps you in boost longer, but fall out of the powerband/vtec but the good part is that it has longer gears. Ive heard the GSR tranny will make you spin ALOT more because of the short gearing but better acceleration.

I have both trannys ( 1.7 GSR and LS) just not sure which one to use!

Suggestions please!

SovXietday

This is what people don't get. The LS keeps you in boost longer because it causes you to go slower.

In general, shorter tighter gearing is always better than longer lofted gearing when it comes to acceleration.

RC000E

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DA TeG 90 &raquo;</TD></TR><TR><TD CLASS="quote">I have heard that the LS tranny keeps you in boost longer</TD></TR></TABLE>

LOL....man, I don't think that statement will ever get old.

Get a 1.5liter bottom end, put a vtec head on it, then set vtec crossover to 2200 rpms....it must be faster cause you'll stay in vtec longer!

The gear spacing of the LS sucks *****, there's no other way to put. Go GSR/LS 5th if you have the option....otherwise just go with a straight GSR. Avoid LS at all costs unless it's all you've got.

90sedan

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SovXietday &raquo;</TD></TR><TR><TD CLASS="quote">This is what people don't get. The LS keeps you in boost longer because it causes you to go slower.

In general, shorter tighter gearing is always better than longer lofted gearing when it comes to acceleration.</TD></TR></TABLE>

I really don't know why people think that either. Keep the gsr transmission.

DA TeG 90

So I will be fine with the b17a1 transmission? and just pick up a LS 5th gear?

90sedan

I don't know why it still isn't clear, but yes keep the b17a1 transmission.

If you want to swap in a LS 5th gear to lower your cruising rpms then go ahead.

SovXietday

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DA TeG 90 &raquo;</TD></TR><TR><TD CLASS="quote">So I will be fine with the b17a1 transmission? and just pick up a LS 5th gear?</TD></TR></TABLE>

There are guys in the 600+ range using YS1s, yes, you will be fine.

HI92TEG

What if i have a s1 b16 cable tranny that is even shorter than a ys1 cable gsr?

Then would it be a good idea to get an LS 5th gear?

90sedan

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HI92TEG &raquo;</TD></TR><TR><TD CLASS="quote">What if i have a s1 b16 cable tranny that is even shorter than a ys1 cable gsr?

Then would it be a good idea to get an LS 5th gear?</TD></TR></TABLE>

If you plan on doing a lot of cruising in 5th gear, then yes.

whiteef8

not to stir the kool-aid the wrong way, but i loved my LS trans on my sc61 ls/v. very civil street driving, although not ideal for drag racing. Haha, I went 12.7 @ 120mph w/ 350hp.

rorik

I don't know why this hasn't been brought up, but with any respectable amount of power, you'll be traction limited in the first 3 gears, even with an ls tranny, right? So as long as your turbo doesn't lose boost while shifting, your car will be just as fast with the ls tranny. With boost by gear, you should be able to be right at the traction limit in the first 3 gears with either tranny..I guess 4th and 5th would be a little slower because of the increased rpm drop, but not really by much.

SovXietday

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rorik &raquo;</TD></TR><TR><TD CLASS="quote">I don't know why this hasn't been brought up, but with any respectable amount of power, you'll be traction limited in the first 3 gears, even with an ls tranny, right? So as long as your turbo doesn't lose boost while shifting, your car will be just as fast with the ls tranny. With boost by gear, you should be able to be right at the traction limit in the first 3 gears with either tranny..I guess 4th and 5th would be a little slower because of the increased rpm drop, but not really by much.</TD></TR></TABLE>

You're just confusing yourself now. GSR/B16 trans is faster than the LS trans, spinning or sticking.

rorik

Confusing myself..lol. I'm just saying, beyond a certain power level, it doesn't matter, your tires will be your limit, not your first three gears..

Whatever

Anyone ever just swap out the final drive in a LS to lower the gearing?

SovXietday

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rorik &raquo;</TD></TR><TR><TD CLASS="quote">Confusing myself..lol. I'm just saying, beyond a certain power level, it doesn't matter, your tires will be your limit, not your first three gears.. </TD></TR></TABLE>

But yet you would still make the only gears you get traction in longer? Why?

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Whatever &raquo;</TD></TR><TR><TD CLASS="quote">Anyone ever just swap out the final drive in a LS to lower the gearing?</TD></TR></TABLE>

That only lowers the final speeds of each gear, it doesn't do anything for the gear spacing... which is where you have the problems of falling out of boost.

VtecCarHauler

someone said it before, go GSR or b16. If LS is all u got then just ride out with it. I am going with a LS because I want to cruise plus I had too much wheel spin with the b16. I was putting down 300ft-lbs with 460whp. My b16 tranny with LSD would light the drag radials going into 4th. When the tight ratio B16/usdm ITR ratios pay off is when you are running 350whp or less. It will make your car run like it has 400+whp on a LS. So my formula is b16/itr 350whp or less street/strip, GSR 350whp to whatever probably the best trans to run for street to hardcore track car, and LS if that's all u got. Hope that helps