I was wondering same thing.. b16 or Ls?
Heres my Hypothesis


This is spinning to 8000rpm, on 205/50/15 tires.

LS (Usdm S1, longest of B series trannys)

1 8000 shift - 4660 in 2nd
2 8000 shift - 5423 in 3rd
3 8000 shift - 5941 in 4th
4 8000 shift - 6348 in 5th

B16 (Jdm S1/J1, shortest of B series trannys)

1 8000 shift - 5050 in 2nd
2 8000 shift - 5520 in 3rd
3 8000 shift - 6231 in 4th
4 8000 shift - 6568 in 5th


Now the differences between the two (if your still dont understand by looking at the data)

390 into 2nd gear
97 into 3rd gear
290 into 4th gear
220 into 5th gear

So as you can see.. Its not that much of a difference, Using the jdm S1 over the Usdm S1 will set you ahead the above rpm's in each gear.

Depends where you madD VtaAKK hits!!. But i make full boost around 4500, and my vtec is at 5300, so the only gear where i will drop out of vtec (but not full boost) is first.. And traction in 1st in 2nd is usually limited anyways on street tires. Not to mention you can cruise on the highway much easier with a LS.


For a daily driven street car with boost, a Longer transmission is much more drivable .

My vote goes to the GSR or LS


Modified by HamiltonRex at 5:55 PM 11/28/2005

 

Another thing you might want to consider since you be FI is... traction. If you have a bunch of boost and short gearing, you'll just spin the tires in 1st and 2nd under WOT. I know this from experience (see bio)

Look into getting a boost controller or Programmable ECU that changes the amount of boost for each gear. I don't know if this feature exists for Hondas, but I've seen it on Turbo dragbikes. It makes each gear feel like first gear by letting the turbo build more and more psi as the gears get higher.

 

<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>

Best Explination

However, I did run into trouble when my power level got to high w/ a stock LS head. I was using a GSR trans and the stock head had to be rev'd to 7500 in order to not have to shift into 5th in the 1/4 so, if using a stock LS head the LS trans may be a better choice.

Phil

 

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

Look into getting a boost controller or Programmable ECU that changes the amount of boost for each gear. I don't know if this feature exists for Hondas, but I've seen it on Turbo dragbikes. It makes each gear feel like first gear by letting the turbo build more and more psi as the gears get higher. </TD></TR></TABLE>

yes it exists.. Expensive. I remembe Blown90hatch ran something like that.

 

ive been in cars that have had all three (b16/gsr/ls) trannies and the b16 and gsr arent bad but if ur not paying attention you'll meet rev limiter pretty quick. imo i like ls just long gears

 

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

yes it exists.. Expensive. I remembe Blown90hatch ran something like that.</TD></TR></TABLE>

He was running an AVC-R. There are a wide variety of Multi stage BC's and Most if not all standalone EMS's have their own version of built in boost control via speed, gear etc. Research is everyones friend

Phil

 

gsr

 

anything with a LSD?

probably be gsr

depends on what your doing

like if your draging probably want to find a tranny that matches your mph at the end of fourth

 

this is the best set up for your boosted ride

gsr 1 & 2

b16 3 & 4

ls 5 trust me it will work like a champ

 

i rock a gsr tranny

 

What does a B16 tranny top out at? Cause I will most likely be racing on the interstate mainly.

 

lol nice rocking the street racing y0

probably somewhere around 200 (km/h) sorry i am a canada Eh on a jdm b16 J1 cable tranny


my b16a2 with usdm tranny hydro i think was around 220/230 not saying i went that fast :/

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PhatBoy5015 &raquo;</TD></TR><TR><TD CLASS="quote">What does a B16 tranny top out at? Cause I will most likely be racing on the interstate mainly.</TD></TR></TABLE>

Please don't do that. Keep it on the track.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Luserkid &raquo;</TD></TR><TR><TD CLASS="quote">None are BETTER then another. Its all personal opinion. I love my GSR gearing for boost. Some people like really short gears on the B16. The tranny i say never to use for boost is the LS. That tranny is for fuel only. and before anyone says "but your in boost longer and thats better" thats the biggest load of crap ever. Just because your in boost longer doesnt mean your going faster, if anything your putting alot more stress on the motor. </TD></TR></TABLE>

I've riden' in luserfaces car and it pulls quite well, the gearing is great. Only thing I don't like about it is driving 70 on the freeway in 5th gear at ~4,000 RPM

 

JDM ITR 4.7 FD LSD tranny.. will get you there quicker but it can be annoying to drive on the highway runs

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by cybergreencivic &raquo;</TD></TR><TR><TD CLASS="quote">id try to get a jdm gsr w/lsd if you could </TD></TR></TABLE>

Thats what i have.. I plan on boost after the winter.

From what i have heard gsr gears are good for boost, n like stated above the is 5th is perfect for gas eff on the highway

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by big juan &raquo;</TD></TR><TR><TD CLASS="quote">this is the best set up for your boosted ride

gsr 1 & 2
b16 3 & 4
ls 5 trust me it will work like a champ </TD></TR></TABLE>

gsr and ls 1st and 2nd gearing is the same

 

gsr leather....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Equilibrium &raquo;</TD></TR><TR><TD CLASS="quote">I'm running a B16 and it seems way too short for gearing. I'd say go GSR, or go LS. I like freeway killers anyways so that's just my opinion. </TD></TR></TABLE>

so change your final drive!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by big juan &raquo;</TD></TR><TR><TD CLASS="quote">this is the best set up for your boosted ride

gsr 1 & 2

b16 3 & 4

ls 5 trust me it will work like a champ </TD></TR></TABLE>

Not a bad idea. If you don't care about gas mileage and can shift quick enough, B16 is the way to go

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PhatBoy5015 &raquo;</TD></TR><TR><TD CLASS="quote">What does a B16 tranny top out at? Cause I will most likely be racing on the interstate mainly.</TD></TR></TABLE>

same here man.. It does 220 at 8k in 5th with 205/50/15's up front

 

b16 with gsr 4th and final drive

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by meunit910 &raquo;</TD></TR><TR><TD CLASS="quote">gsr leather....</TD></TR></TABLE>

WTF

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HamiltonRex &raquo;</TD></TR><TR><TD CLASS="quote">same here man.. It does 220 at 8k in 5th with 205/50/15's up front </TD></TR></TABLE>

******* idiots.

 

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

lol

My old turbo LS could get up to at least 140 mph. speedo only went up to 130, but the needle kept going around back to 0.

 

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

STFU dude.. Speed was calculated here at http://crx.honda-perf.org/math/index.html

How else do you think i got all my ratio's? I aint that good at math