I only ask cause i get different answers to this question so i wanted more feedback on the subject.

 

all depend on how deep is your pocket.
If it's heavy then get the b16
If not then the LS
Kali gas will rape you....

 

b16 tranny is good for a b16 motor,,ls tranny is good for an ls motor..Think about this ,,If you have say a b16 turbo with an ls tranny ,,every time you shift you would be out of vtec and out of powerband..and if you're running a medium-large size turbo it will have to spool back up..Unless your making like 600hp keep the b16 tranny..


Modified by Mr.speaker at 3:59 PM 1/3/2006

 

wellits for a b18b1 so i guess ill look into an LS tranny then.

 

B16 no if ands or buts.

Ls tranny is teh poo

 

It's more about your setup. While falling out of Vtec may be worth concern, my main concern would be falling out of boost. So if you just have a kit at 6-7 psi, I would stay with the si. If you're making more power with a larger turbo, get the ls.

To the rest of you guys, provide reason as to why you think it's "Teh Poo". Long gears are always better for boost. So long as the power curve suits it.

 

plain and simple, b16 gears are shorter they will accelerate faster.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Ace$nyper &raquo;</TD></TR><TR><TD CLASS="quote">B16 no if ands or buts.
</TD></TR></TABLE>

Exactly. The LS motor loves the B16 tranny as well. The ONLY downside to having a short geared tranny on a low revving motor is that shifts will come quicker and Top speed per gear is reached fatser(may cause to shift into 5th in the 1/4). Transmissions can be looked at as torque multipliers and torque is what moves the mass forward.

Phil

 

yeah there was a long thread about this in the F/I forum. b16 was the winner!

 

really?

on a 10-15 psi set up what do you recommend?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by h8tred &raquo;</TD></TR><TR><TD CLASS="quote">
To the rest of you guys, provide reason as to why you think it's "Teh Poo". Long gears are always better for boost. So long as the power curve suits it.</TD></TR></TABLE>

I gave a small explination above. Longer gears are NEVER better. Having the shortest possible gearing while not running out of RPM for a given MPH is what is best. Example: Some High WHP cars use B16 1st,2nd, 3rd then utilize a GSR 4th due to RPM limitations. With 24.5" tires revving to 8200 RPM the GSR 4th will only go 131mph. Lot's of people have made enough power to trap those speeds on a stock head therefore the GSR 4th would be the optimum gearing selection.

Phil

 

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

on a 10-15 psi set up what do you recommend? </TD></TR></TABLE>

"XX psi" and "XXX WHP" have nothing to do with it. If you want to accelerate faster use a shorter geared transmission Period!

Phil

 

b16. because..
example... if you have a super high power car that only builds those extreme numbers within 2000rpm, each shift will bring you right back to the beginning of your power band, exactly where you'd want to be

or you have a boosted stock ls... each shift will bring you back right into the most power you can possibly squeeze out.

-ls trans-
high power car will be out of power band constantly

the stock ls, although in boost after each shift, will still only be making a ***** amount of power at the lower rpm and thus take longer to reach the higher output levels available at higher rpm


<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hondaguyef &raquo;</TD></TR><TR><TD CLASS="quote">Transmissions can be looked at as torque multipliers and torque is what moves the mass forward.Phil</TD></TR></TABLE>
he meant power, as torque is out of the game after 5252rpms but he's right

would you put lower gears in a mud truck when power is crucial? no... thats why they use gears as low as up to the multi-1000's:1

/end discussion

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hondaguyef &raquo;</TD></TR><TR><TD CLASS="quote">With 24.5" tires revving to 8200 RPM the GSR 4th will only go 131mph. Lot's of people have made enough power to trap those speeds on a stock head therefore the GSR 4th would be the optimum gearing selection.

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

But those 24.5" tires change the gear ratio to something lower than the ls I'm sure. Give me some time, and I'll have numbers for you.


Something like a 17.7% reduction in the si gears.

 

Ironically, a stock 99-00 si tranny (y21 or something) running on 25.5 inch slicks would have the same ratio as an ls with stock size tires. Aside from 1st and 2nd, which would be shorter in the ls with stock tires. Something like that anyway.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by h8tred &raquo;</TD></TR><TR><TD CLASS="quote">Ironically, a stock 99-00 si tranny (y21 or something) running on 25.5 inch slicks would have the same ratio as an ls with stock size tires. Aside from 1st and 2nd, which would be shorter in the ls with stock tires. Something like that anyway.</TD></TR></TABLE>

but if you are needing to use slicks.... you'll still need them with the ls trans. which then would bring you back to an even crazier high gear

 

That's true. He never really specified though. It would be best if you could mix and match to get what you need. I wasn't trying to spark a fire, just looking for technical proof.

 

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

but if you are needing to use slicks.... you'll still need them with the ls trans. which then would bring you back to an even crazier high gear</TD></TR></TABLE>

Yep^^

h8tred,

I'm just stating facts and using real world experience. Do whatever you feel is correct and can afford. I'll use Physics and what has proven to work and keep going fast(er).

Phil
5150

 

no, no fires here. but the shorter gears are best..

for those new to turbo theorys:
there is no loss of boost as someone said earlier, the bov purges excessive boost to prvent surge, but the momentum of the turbo combined with still escaping exhaust gases will keep it spooled (yes there is a slight loss due to the slight wave of pressure sent back to the compressor and simple friction of bearings) but that is minimal at best almost immeasureable, as soon as you slam the throttle it'll be back at boost as it was, however the longer gears put you into a lower rpm which could cause a boost loss due to less exhaust being pumped out of the engine.. and still you would be at a lower rpm which in our honda engines means dramatically less power

and with the slicks.. a hybrid of any kind with tall slicks and a b16 trans may be like an ls, but the increase in grip is sooo much needed in a fwd car and the increased power of the turbo can overcome this.. (lets say 12.5second pass now at 105mph)

the b16 trans with street tires... well that'll just make alot of smoke (that'd be a 13.5sec run with a trap speed close to 102mph)

the ls trans with street tires... that'll make alot of smoke 1/2 way down the track, by the time you catch traction your acceleration will still be limited by the longer gears.. (14 sec pass with a 95mph trap)

and the ls trans with slicks... good grip but may be close to stalling at the line, grip will be there but acceleration still inhibited by long gears (so you may get a 13-13.5 but maybe at only 90-95mph)

keep in mind these figures are not to be debated as they are just examples, but now yall get the idea, and street tires i mean a decent tire... if you come to the track with good-old good years, even with an all motor mini-me, you might as well just enter a burn out contest lol

 

oh great...so with all the info provided im convinced that the b16 tranny would be best.

I also though shorter gears would get you better times i just wanted more technical info. thanks guys!

 

Basically run the shortest gearing possible as long as traction permits and if your a 1/4 guy keeping it in 4th. Changing tire diameter to meet changes is much easier than changing your tranny. Stick with the short tranny.

 

julio the only prob you have is finding a cable b16 tranny if u need cable, but then again hydro ones are pretty expensive.

 

yeah no ****! i asked around and they want 850 for one at Honda-acura.com..expletive!

im gonna go with what my budget allows and get an LS after all. expletive it!

 

Well, if you can find one that has bad syncros, or shift forks, you could get it for cheap and use the gears in yours no?

 

It comes down to this:


Track/Street Car:

Use the transmission that gets you closest to 4TH GEAR'S REDLINE at the end of the 1/4 mile.


Daily Driver:

Whatever you want. It will depend on turbo size, but either will be quicker than Mr. Joe Camaro will suspect. I'd still suggest a GSR w/LS 5th.