sorry, no pictures...

but, i had a cable YS1 casing, with hydro GSR gears and a quaife LSD installed about 6 months ago. ran SMMP's 3.5Mi course and was turning 3:05s consistently. This was in July...

then i blew a gear and some synchros... so pulled the gearbox and installed a J1 cable.

same course, colder weather, Daliracing event, and could not break 3:11s. driving line the same, no change in style. tires were used back to back, except one autocross (toyo ra-1s for the record).

i couldn't believe the difference though. it's amazing how much a LSD can change the way a car scoots around the course.


i wish i had pictures... will have video up some day.

 

J1 = GSR gearing? That'll make a huge difference too, if they're not the same.

 

Hey, and I was just reading about your CRX in an old GRM!

 

Are there a lot of low-speed, hairpin type turns on that track? It's really hard to imagine gaining 6-7 seconds just from an LSD, even on a track that long. What type of whp are you putting down? I'm used to my clutch type Mugen diff in my H4 teg, but this weekend I drove a street GSR in a DE with an open diff and there was only a few places where I thought the LSD would make a difference .. and even then it was probably only worth a tenth or 2 by my estimation. The only good way to do that type of comparison is to run with and without it on the same day or back to back days. The only data I've seen from a run like that was from WS this year when Edo blew up his good tranny and put in a bone stocker overnight. His times on Sunday were only something like .2 secs slower and everyone elses were flat to a couple tenths faster from what I could tell. I'd say net difference was .5 secs max and that was accounting for LSD and FD.

- Scott

 

how much power are you pushing? unless you've got enough power to spin the tires in 3rd and 4th gears, i highly doubt you'll find 6 seconds worth of difference. for my 125whp car an lsd is only worth a couple of tenths according to lapsim. i can only generate wheelspin in 2nd gear though.

 

What about the alignment?

The LSD is deffinately faster partly because you can accelerate earlier in the corners but I don't know if I believe theres a 6-7 second difference even in a 3 minute course.

 

Were you getting a lot of wheelspin on the 311 laps? See any extra tire wear?

I've been w/o LSD on my B16/S1 for years and I get lots of wheelspin so I can't be as aggressive on the throttle on certain corner exits.

At Spring Mtn, the most wheelspin I got was the hairpin right after Ego Check.

 

the car dynos at 217whp, 144tq... and the course has at least two very slow speed turns (slow, slow 2nd gear turns), and a handful of mid-power 2nd gear turns.
there are two sweeping 3rd gear turns. with the LSD, i was able to power thru them at relative high speeds...without, the car tends to push more. maybe i'm imagining it...

this was recorded using an ultra-lap. The alignment wasn't changed... tire wear is about normal.

the only other thing i can thing of being different is weather. july was running 95-100 degree weather. we were running in 70-80 degree weather.


of course, gearing was different. the J1 has shorter gears than the GSR.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by FlyZlow &raquo;</TD></TR><TR><TD CLASS="quote">The only data I've seen from a run like that was from WS this year when Edo blew up his good tranny and put in a bone stocker overnight. His times on Sunday were only something like .2 secs slower and everyone elses were flat to a couple tenths faster from what I could tell. I'd say net difference was .5 secs max and that was accounting for LSD and FD.

- Scott</TD></TR></TABLE>

Scott,

That track is not like anything else. You HARDLY use an LSD anywhere on that track and different FD's can net the same lap time as well.
Not a great track to compare something like this!

I would have to say that the LSD, gearing, and weather all contributed to the time differences.
At a track like Buttonwillow, LSD and gearing can mean 2-3 seconds I think especially in a car with LOTS of whp like this car has!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Driven &raquo;</TD></TR><TR><TD CLASS="quote">of course, gearing was different. the J1 has shorter gears than the GSR. </TD></TR></TABLE>

Yeah my S1 tranny has the short gearing, so even with my torqueless B16 I can light up the tires at times. 144 tq is nice! I must get my B18C block in ASAP.

 

yeah, but even then, our cars are almost identicle, except for the LSD in my B16 YS1 trans, and we were running almost even at Spring Mountain a couple of months ago. I couldn't detect anywhere were my LSD had a noticable advantage over your open diff car.

of course, both of us are still running torqueless B16s, so maybe the increase in torque is the deciding factor that Driven has uncovered with his setup, that makes the LSD much more critical.

 

here ya go kam,
got this in the morning. didnt take too many more since i spun a rod bearing. Man i have bad luck at that track!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by R you serious &raquo;</TD></TR><TR><TD CLASS="quote">
here ya go kam,
got this in the morning. didnt take too many more since i spun a rod bearing. Man i have bad luck at that track!</TD></TR></TABLE>
wow, thanks... didn't think anyone got any pics other than trackday.net ($50 for a cd, eek!)

And spun a rod bearing? that sucks... i blew my gearbox on the way home... had lots of oil problems throughout the day. but yeah, you do have bad luck there... did you at least stay for sema and enjoy the vegas lifestyle? see... break at Willow... you got... uh... willow to entertain ya.

break in Pahrump, you got A LOT of things to do...

 

J1 gear ratios.
1. 3.250
2. 2.052
3. 1.416
4. 1.103
5. .906
FD. 4.400

hydro gsr
1. 3.23
2. 1.90
3. 1.360
4. 1.034
5. .787
FD. 4.400

looking at the number's they both seem to have nicely spaced ratio's. the j1's 4th to 5th is also very close. its hard to believe the LSD cost you that much time

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Driven &raquo;</TD></TR><TR><TD CLASS="quote">
yeah, you do have bad luck there... did you at least stay for sema and enjoy the vegas lifestyle? see... break at Willow... you got... uh... willow to entertain ya.
break in Pahrump, you got A LOT of things to do...
</TD></TR></TABLE>
missed out on sema. i had to book it home and get the car fixed for a sound testing track day at the infamous Arizona Motorsports Park this past weekend.

I did however aparently see the entertainment beautiful Pahrump had to offer and spent friday evening over at the very fine Kingdom gentlemens club.
1 girl works there.. unbelievable. lol

 

what LSD are you using? im having a hard time finding one for the J1/S1 tranny

edit, im retarded. i didnt realize you USED to have LSD and now you dont.


Modified by GSRCRXsi at 11:06 AM 11/8/2006

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by GSRCRXsi &raquo;</TD></TR><TR><TD CLASS="quote">what LSD are you using? im having a hard time finding one for the J1/S1 tranny</TD></TR></TABLE>

Kaaz/Quaife seem to indicate the fitment for 90- up Integras are the same.
So makes you think the 90-91 diff (early cable internals) are identical to the
later 92-up internals. Plus I think I heard someone mention putting a ITR
LSD into an older S1 housing. So it will probably work. If I ever pull out
my S1 ... I can confirm it for you.

 

FWIW, I ran a 2m48s lap on the 3.1 mile configuration a few months ago?
This is with a B16/S1 no LSD. Love the track there.

 

I think efffected lap times with or without LSD can also be attributed to the amount of right hand or left hand turns there are.

I know for me, running a K20a2, with no LSD & 156trq 206whp I'm loosing ground on lefties a lot, Especially 2nd gear lefties. I always seem to push more on lefties. Why, less traction.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by WWDTrackRacer &raquo;</TD></TR><TR><TD CLASS="quote">FWIW, I ran a 2m48s lap on the 3.1 mile configuration a few months ago?
This is with a B16/S1 no LSD. Love the track there. </TD></TR></TABLE>
not bad, not bad... we ran there twice... i wanna say that's when i was pushing around 154whp and the J1 and was doing 2:47s...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Driven &raquo;</TD></TR><TR><TD CLASS="quote">
not bad, not bad... we ran there twice... i wanna say that's when i was pushing around 154whp and the J1 and was doing 2:47s... </TD></TR></TABLE>

that way people can tell me how to go faster. i hardly have time to look @ it! LOL.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Driven &raquo;</TD></TR><TR><TD CLASS="quote">
i blew my gearbox on the way home... had lots of oil problems throughout the day.
</TD></TR></TABLE>

Maybe there are some other problems going on and possibly down on power?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 88 rex &raquo;</TD></TR><TR><TD CLASS="quote">Maybe there are some other problems going on and possibly down on power?</TD></TR></TABLE>
oil problems were related to some idiot routing the catch can/pvc lines wrong (me).

oil temps were kinda high too...


gearbox was working fine, until i left. arg!