As the title says....
Well, I was wondering what the advantage of running an LS tranny with a turbo setup would be? I've always just adopted the rule of an LS tranny being better for turbo than a b16, gsr, or type-r tranny would be. But, I've never actually thought about why...so, why is a non-vtec (LS) tranny better than a vtec tranny (b16,etc.) for turbo? Is it the longer gear ratios, or is it the longer final? I mean, would it be better to run a b18 cable tranny with a J1 final drive? Or would it be better to stick with the complete calbe ls tranny with the 4.21 final? I currently have a Y1 Sir tranny with I believe 4.27 final. It's hooked up to my B20b and I wanna boost next summer. What tranny or tranny combo should I run?

 

It is really up to you and how often you want to shift; a higher final drive i.e. B16 tranny and you'll flip through the gears like nothing, while if you were in the B18Bs tranny you could say hold on a little longer. The physics are above me, but it still comes down to that in my mind: How fast do you want to go, and how fast do you want to accelerate

 

well....i've always been told that youd go faster with an ls tranny hooked up with turbo than with a b16 tranny...so that "acceleration" idea doesn't make sense since a b16 tranny accelerates faster.

 

b16 is better for boost, but you need to grip.

 

i'm going to keep my LS tranny in place when it gets boosted this winter.

i plan on having more than 300 HP, so the CRX should pull good regardless. i know i dont want to have to keep shifting and/or burning out when i'm trying to accelerate W.O.T.

 

want to shift more, or ride out in the gear longer?
kinda toss up

 

b18 would be a better tranny in my belief because it is alittle hgher geared. If you are putting 300+ hp down you will want the longer gears. Longer gears = less shifts

 

For drag racing, the b16 trans would be better.

 

please search...this especially has been covered a TON of times...

BTW: check out the link.

http://uploads.ungrounded.net/...g.swf

 

in would honestly be a waste of time for you to waste all that money on a turbo setup and only be able to go 135 mph when in 5th gear at 6800rpm i was running 141mph the other day. if all you honestly want is immediate acceleration, then yeah it would be the obvious choice for you to pick up a ls tranny but in my opinion its just not enough bang for the buck if you know what im saying. with 300hp the longer gears would actaully help you out not only in not having to shift as often but also increasing traction in the earlier gears which inturn would make you faster.

 

there is NO advantage to having an LS transmission for any reason other than more comfortable highway cruising. being in gears longer results in accellerating slower.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Crakadic &raquo;</TD></TR><TR><TD CLASS="quote"> Longer gears = less shifts</TD></TR></TABLE> = slower

imo, the perfect transmission for a turbo setup is the gsr. it's not too long like the LS, but it's a little more comfortable for the street than the b16. just something to consider.

 

Acceleration is acceleration no matter what application is being used on the engine. Taller gears will result in being slower PERIOD.

Making your gears taller is a poor excuse for catching traction, thats what slicks, LSDs, different stages of boost and counterweight systems are for.

I would only choose the longer gears for comfort and economy.

 

BAM!

 

why not ITR with LSD?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by yellowcrx1991 &raquo;</TD></TR><TR><TD CLASS="quote">Acceleration is acceleration no matter what application is being used on the engine. Taller gears will result in being slower PERIOD.

Making your gears taller is a poor excuse for catching traction, thats what slicks, LSDs, different stages of boost and counterweight systems are for.

I would only choose the longer gears for comfort and economy.</TD></TR></TABLE>

What he said. Longer gearing = slower. However with high output setups traction does become an issue, shorter gearing = wheel spin. But for you I'd go with a b16 1-4 and throw in the LS 5th. Great accel to 100+ then a nice overdrive gear for highway cruising.

 

GEEZ, hallelujah, there are intelligent people that actually have a clue how gears work. thank you, blah13 and yellowcrx1991.

 

I'd say with turbo, the LS tranny would be worth it, although the b16 tranny would of course give better acceleration, with boost, you can enjoy torque, so you really don't need the extremely aggressive gearing. Honda has the most aggressive trannies in the industry (it seems). Highway cruising will be so much nicer, And to tell truth, ls cable and y1 trannies are very similar, same final drive, ls actually has more aggressive first, but 2-5 aren't close ratio.

 

one last question.

with over 2X the H.P. and torque than normal, wouldn't the slight LS gearing issues when compared to the B16 tranny be non-existant?

does anybody have any time slips of this HUMUNGOUS difference between the two? lets say pre- and post-B16 tranny installation on a turbocharged LS?

gracias

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CRX_1.8T &raquo;</TD></TR><TR><TD CLASS="quote">does anybody have any time slips of this HUMUNGOUS difference between the two? lets say pre- and post-B16 tranny installation on a turbocharged LS?</TD></TR></TABLE>

I cant provide time slips, all I have is claims from people on this board. I know in the D series world your basic 15.5 with a dx tranny will become roughly a 15.2 with an Si tranny, all gears being the same, the exception is the final drive, going from 3.88 to 4.25 So gearing certainly makes a diff but I cant tell you the exact difference between b16 and LS trannys.

 

thanks for the reply. because i have planned on keeping the LS tranny but it has always been in the back of my mind whether or not a B16 tranny would be a better choice for the money.
i'm still up in the air i guess...

 

just keep the ls, it is already an aggressive tranny compared to 99% of other cars.
I'm telling you this because shift the y1 was quite a hassle, first gear was ridiculous lasts like a second before you shift. Sometimes i just use 2 for starting off, its like a first gear in a dx.

 

i still have to say one last time, the ls tranny sucks, no matter what.
if i were you, i would try to find a gsr tranny. it's really the <U>perfect</U> tranny for turbo


Modified by LSvtec03 at 3:14 AM 9/23/2004

 

you make better use of the power you have with longer gears. go with the ls.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 5litereater &raquo;</TD></TR><TR><TD CLASS="quote">you make better use of the power you have with longer gears. go with the ls.</TD></TR></TABLE>

What kind of bullshit are you pulling here, its simple math. The bigger your torque multiplication(shorter gear)the more power you put down.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by yellowcrx1991 &raquo;</TD></TR><TR><TD CLASS="quote">What kind of bullshit are you pulling here, its simple math. The bigger your torque multiplication(shorter gear)the more power you put down.</TD></TR></TABLE>
dude, they just don't get it. i don't understand....