So its that time again to look into final drives for my Integra GSR. I am pulling the tranny and I am going to have a KAAZ LSD installed. At the same time it makes sense to put a FD in, if it makes sense.

With that said, I am going to LRP, NHIS and Watkins this year and I am looking for anyone who has a 4.7 or 4.9 and has driven these tracks. My huinch is that it is best to keep the 4.4 in favor of not having to use the dredded 5th gear.

Anybody care to offer any insight. As it stands now, at the end of the straights at both NHIS and LRP, I am just about out of gear in 4th gear.

 

i dont know why using 5th gear is so bad. i havent used my 4.7 at lrp or the glen yet. but i know it will bake a big differance at the glen climbing the toe and uphill esses. if your in there i would definately install a shorter final.

 

My GSR set up as a mild DSP/track school car would top out 4th at the Glen when tracking out on the "kink" on the back straight then use 5th for maybe 10 seconds or so with very little acceleration. This is with stock gears. Most of the rest of the track at the Glen and LRP the gears work very well. Places that stretch 3rd or 4th near the limit would mean an extra up and downshift where a single gear works now. On the uphill at the Glen, the shorter gears would help acceleration, but would get to top gear with the least acceleration sooner and spend more time in top gear. I'm also near the top of 4th on the front straight and probably would need 5th briefly or bounce off the limiter for a sec or two in 4th. It's all a tossup whether it would really help. I am also curious what anyone who has actually run the shorter gears thinks.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mohudsolo &raquo;</TD></TR><TR><TD CLASS="quote">My GSR set up as a mild DSP/track school car would top out 4th at the Glen when tracking out on the "kink" on the back straight then use 5th for maybe 10 seconds or so with very little acceleration. This is with stock gears. Most of the rest of the track at the Glen and LRP the gears work very well. Places that stretch 3rd or 4th near the limit would mean an extra up and downshift where a single gear works now. On the uphill at the Glen, the shorter gears would help acceleration, but would get to top gear with the least acceleration sooner and spend more time in top gear. I'm also near the top of 4th on the front straight and probably would need 5th briefly or bounce off the limiter for a sec or two in 4th. It's all a tossup whether it would really help. I am also curious what anyone who has actually run the shorter gears thinks.</TD></TR></TABLE>

Those are my sediments exactly. The extra shifts alone cost time and then having it dog in 5th gear is no good either. Any other opinions?

 

At what RPM are you shifting?

 

8500 RPM

 

Hrm. Alright, scratch my idea of getting the shorter FD and bumping the redline up a bit. That sounds high enough already.

 

your 5th wont be a dog anymore with the new final. i went form a 4.4 to a 4.7 in a b16 trans and picked up 10mph down the front straight at summit point. i dont think you will be shifting more, just sooner. it might be an issue in a few places but i still think it is ultimately faster.

 

Anyone know of a good tranny shop in the New England area to install an LSD and/or FD?

I know MSN, but I am also looking for others.

 

DSG (dent sport garage)

http://www.dentsport.com

s

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by VTECAcuraGSR &raquo;</TD></TR><TR><TD CLASS="quote">Anyone know of a good tranny shop in the New England area to install an LSD and/or FD?

I know MSN, but I am also looking for others.</TD></TR></TABLE>

Are you at all mechanically inclined? It's actually not that difficult, and there's a VERY detailed write-up available on here. If you were closer, I'd do it for dirt cheap, but Baltimore is a bit of a haul from CT.

 

Doing it yourself is a fairly easy process. A little time consuming but it's straight forward.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by VTECAcuraGSR &raquo;</TD></TR><TR><TD CLASS="quote">Anyone know of a good tranny shop in the New England area to install an LSD and/or FD?

I know MSN, but I am also looking for others.</TD></TR></TABLE>
if you dont mind comming out to long island i know a few people that can do the install for you.

 

I looked for that install thread for 30 damn minutes and can't find it. Anyone got the link?

 

I thought you said you weren't going to do the LSD and wanted to sell the car? (This is what I actually thought you were going to do. LOL)

 

Didn't you hear, you should not believe everything you read on the internet, it's full of lies you know.

Lo-Buck EF, I would expect the gains you found on the b16 due to it's much shorter/closer gears. The stock 5th with stock 4.4 diff on a GSR trans using stock OD tires and the stock 8k redline gives about 156mph with 4th giving 119mph.

I played with math and assuming:8.5k redline and 22.8" od tires, then the speed in gears 3,4,and 5 follows.

stock 4.4: 93, 123, 161
4.7: 87, 115, 150
4.9: 83, 110, 144

Look at where you are in each gear on each section of the tracks you run and decide if it will really help or hurt you. I don't see it being a real help. The real problem is that 5th is too tall. Making all the other gears too short to compensate is not a great plan.

A better idea in my opinion would be a gear I have never heard of, 4.2

Now, 5th is even more useless at 168mph, but the rest of the box would then go:
128, 97, 69. The tighter corners that currently put you at the bottom of the useful range of 3rd could use 2nd then back to 3rd shich would now have slightly longer legs and 4th would probably just run out at places like the Glen.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by VTECAcuraGSR &raquo;</TD></TR><TR><TD CLASS="quote">I looked for that install thread for 30 damn minutes and can't find it. Anyone got the link?</TD></TR></TABLE>

I'll post it when I get home