how important is an lsd?

[94z6ex]

How important and essential is an lsd with a boosted motor?

ive heard both good and bad things about the obx lsd's but the bad things scare me away from them and quaifes are soooo expensive.

ive always thought i wouldnt need one, but now im thinkin it may be a good idea. If i dont have one is there a much greater chance of stuff breaking?

thanks

[91HB-D15b2]

dunno much about LSD...ive always been able to bake both tires in a burn out with a open diff...4 speed and SI tranny

[93 red ls]

two wheels holding the power down to the ground is always better than one?

[champneys05]

very important

[jimmyb34]

what have you heard bad about the obx... cuz ive yet to hear of one failing.. and everyone ive ever seen say they have them say how much they like them also

[94z6ex]

what have you heard bad about the obx... cuz ive yet to hear of one failing.. and everyone ive ever seen say they have them say how much they like them also

that some modification is required to make the product work.........and the only reason that scares me is because it is an internal piece.

[ryan89crx]

that some modification is required to make the product work.........and the only reason that scares me is because it is an internal piece.no modification is required. on the original ones(about 2 years ago) there was no bevelling on the axle cup, making it difficult to remove the axles. that has since been fixed on the newer models

[spool'nsol]

If you dont put a lsd in there you'll break your stock diff

[94z6ex]

so i need an lsd.......no way around it?

[ryan89crx]

so i need an lsd.......no way around it?there are lots of guys running open diff. it really depends on power goals and what the car is going to be used for

[94z6ex]

there are lots of guys running open diff. it really depends on power goals and what the car is going to be used for

power goal: 300whp

use: minimal track use, probably just to see what the new setup will run. mainly just daily driving and the occasional race on the street. but on the street, my tires wont grip as good as at the track so im sure they will both spin just like they do now. I wont be running but 8psi from the launch anyway. and i will be preloading from the launch also.

[spool'nsol]

well i'm just saying from experience. I broke two stock diffs, and i was only making around 205 whp.

[transzex]

118 whp = two broke stock diffs

with 300 whp, only takes one time wheelhoping to bust a diff or a axle.

[94z6ex]

118 whp = two broke stock diffs

with 300 whp, only takes one time wheelhoping to bust a diff or a axle.

but with an lsd, that wont happen? am i understanding right?

[transzex]

then you have to worry about axles from wheelhop......

[94z6ex]

then you have to worry about axles from wheelhop......

traction bars......... that takes care of wheel hop and broken diffs and axles.

if i need to get one i will, but it would be nice to now if i can put it off for a while.
is that possible to not run an lsd for the time being with that much power if im careful about not breaking the tires loose?

thanks

[Sohc Wrath]

Full race makes nice tration bars :TU:

[94z6ex]

Full race makes nice tration bars :TU:

thanks for the info

[Bizzar]

There are two types of people running an open diff.

Those who have broke one.

And those who are GOING to break one.

[94z6ex]

here are some things with the obx people had probs with


http://www.honda-tech.com/zerothread?id=1249085&page=1

http://www.honda-tech.com/zerothread?id=1297614

[siregcivic]

There are two types of people running an open diff.

Those who have broke one.

And those who are GOING to break one.

sorry to thread jack... im boosted using a dx tranny with a z6 block at 10-12 psi... i try not to wheelhop when i launch it hard.. usually both tires just spin, but the second gear shift is spin/wheelhop..

so beating on my trans that hard is not good i know but how long will the stock diff last??

btw im using a hdpp 6 puck solid disc

[94z6ex]

this is really frustrating because i know im prolly going to need an lsd for my build yet, i know i can get by without it for a while. Its $400 that i wasnt planning on spending. i think i should just nut up and buy one

[lilryanadamse]

good call.

[spool'nsol]

man law

[ryan89crx]

here are some things with the obx people had probs with


http://www.honda-tech.com/zerothread?id=1249085&page=1

http://www.honda-tech.com/zerothread?id=1297614no modification is required. on the original ones(about 2 years ago) there was no bevelling on the axle cup, making it difficult to remove the axles. that has since been fixed on the newer models

[94z6ex]

i read in your build thread that you are also going to get an lsd.......are you going to run obx?

thanks

[MyblkVTEC]

im gonna run obx.... in the future.. was for right now I think the traction bars and ES motor mount inserts will do fine...

[94z6ex]

im gonna run obx.... in the future.. was for right now I think the traction bars and ES motor mount inserts will do fine...


see thats what i understood....the diff will break with wheel hop but if you have traction bars, wheel hop is eliminated, correct? (is wheel hop the only thing that destroys open diffs?)

i will have to buy traction bars anyway, and if they can make a stock diff work without breaking, why invest in an lsd?

i guess i need further clarification.
i should prolly just buy one huh?

but any help is appreciated

[lilryanadamse]

i would think the spyder gears in your stock diff would have trouble surviving under 300hp when you hook up in first, regaurdless of wheel hop. i could be wrong though. that is a lot of strain that honda did not take into consideration when they built your car with only 127hp. the traction bars take care of wheel hop, but an lsd will equally distribute power to both wheels. i would think that the harder you hook, the more likely the stock diff is to break. so traction bars would lead to an earlier demise of your stock diff. just sack up and buy an lsd now and never worry about it again. you will be happy you did. i tried calling you pos, but i guess you are screening your calls now.

ryan

[ryan89crx]

i read in your build thread that you are also going to get an lsd.......are you going to run obx?

thanksyes

[transzex]

this is really frustrating because i know im prolly going to need an lsd for my build yet, i know i can get by without it for a while. Its $400 that i wasnt planning on spending. i think i should just nut up and buy one

that $400 LSD + parts + labor = $700

$700 + good tranny = $1000 dollar tranny, I've built quite a few.

6-7 OBX's installed so far, never a call back. MAtter of fact only one tranny has ever failed to satify and it was my first build for someone else.

I'm now beating on that tranny DAILY as my "city" that I put the wrong 5th gear in......

[94z6ex]

that $400 LSD + parts + labor = $700

$700 + good tranny = $1000 dollar tranny, I've built quite a few.

6-7 OBX's installed so far, never a call back. MAtter of fact only one tranny has ever failed to satify and it was my first build for someone else.

I'm now beating on that tranny DAILY as my "city" that I put the wrong 5th gear in......

you say $400 + parts + labor.

the labor will not be factored in......but what do you mean by parts? isnt it a straight drop?

i pulled my tranny not to long ago (4 months) and replaced the isb, and all seals........

[Sonic]

I used to have an EF9 it had a Plated lsd and i one more races becasue of that peace of kit they improve take of handeling they can get a little tricky but there well id never havea car with out one.... well i do at the moment but thats not buy choice...

[kulo]

if u cant afford a qauife lsd go with obx :)

[transzex]

You should use new diff bearings, unless you snag the speedo gear from your old diff, you'll need that also. Plus replace the input shaft bearing/seal/thrust washer, maybe replace the other 3 seals also......

80mm diff bearings = 34.70, need 2, call it $70
Axle seals $13 for both
Speedo ring gear, $20
ISB bearing/seal/thrust $30
SHift shaft seal $6

$139 + shipping and then you have to worry about the shifter forks......

[94z6ex]

You should use new diff bearings, unless you snag the speedo gear from your old diff, you'll need that also. Plus replace the input shaft bearing/seal/thrust washer, maybe replace the other 3 seals also......

80mm diff bearings = 34.70, need 2, call it $70
Axle seals $13 for both
Speedo ring gear, $20
ISB bearing/seal/thrust $30
SHift shaft seal $6

$139 + shipping and then you have to worry about the shifter forks......

and if ive already done the isb replacement, and replaed all the seals about 8,000 miles ago, i have to do it again?

and what is the deal with all of this shimming that im reading about in the FAQ in the stickies?

thanks

[transzex]

if you know it's good, then don't worry.

Shimming is required ANYTIME the diff is changed.

[94z6ex]

if you know it's good, then don't worry.

Shimming is required ANYTIME the diff is changed.

thanks transzex, i appreciate the info and help........looks like i will be ordering one tonight or tomorrow. :TU:

one last question though.........the b16/18 oil rings that you use to shim; where can i pick those up and for about how much $ can i get it for?

thanks

[transzex]

find someone junking a B16/B18 motor, or reringing it. Enough oil rings from it for EIGHT OBX installs.

Ever notice I've a cheap bastard?

[ryan89crx]

i have a full set of pr3 rods/pistons with rings still attatched :smile:

[SLO SOHC]

I need a smarter parts guy!

He tells me the thrust washer doesn't come in different sizes...

Do you have a list of numbers transzex? HMM nevermind it's in the SM! lol!

[24-7]

Try running on one leg. Thats open diff/1 wheel peel.

[Sonic]

do they make after market parts to put an lsd in a none lsd box as i wont be able to drive it with out one :( no where near as good on the bends...

[94z6ex]

after i have traction, say in a 3rd gear pull, will my stock diff be ok to support the power?

[Sonic]

after i have traction, say in a 3rd gear pull, will my stock diff be ok to support the power?

LSD trust me mate the car becomes such a dream to drive on the twisty stuff :mikej: ....

[transzex]

I need a smarter parts guy!

He tells me the thrust washer doesn't come in different sizes...

Do you have a list of numbers transzex? HMM nevermind it's in the SM! lol!

only one size, beveled.

[transzex]

after i have traction, say in a 3rd gear pull, will my stock diff be ok to support the power?

until it explodes the cast spider gears.....

[94z6ex]

until it explodes the cast spider gears.....

what are the chances that will happen transzex? the only reason i am not buying the lsd is because there is noone to install it for me. The persone who helped me with my ISB install is building my mototr but he said that he doesnt work on trannys. he said he could do it if it was simple, so im assuming that the isb install was simple for him. how much harder is changing the diff?

but please let me know what the limit of the stock diff is if i do not break traction or wheel hop?

thanks

[transzex]

118 whp, I busted two trannys, the spiders let go.

Greddy turbo D16Z6 running 14.4 on street tires, you might know about John Murphy, he's in the write up on the ZC/Si swap where I learned to do trannys, he busted two trannys, damn spiders.

OBX install is cake.......if a monkey can install a ISB, how is a OBX harder????

YOU WILL explode the diff with your power, and likely wipe out the case in the process. You can pay it now, or pay it later.

Don't wanna pay it, sell the snail and buy a HF CRX to put around.

[94z6ex]

118 whp, I busted two trannys, the spiders let go.

Greddy turbo D16Z6 running 14.4 on street tires, you might know about John Murphy, he's in the write up on the ZC/Si swap where I learned to do trannys, he busted two trannys, damn spiders.

OBX install is cake.......if a monkey can install a ISB, how is a OBX harder????

YOU WILL explode the diff with your power, and likely wipe out the case in the process. You can pay it now, or pay it later.

Don't wanna pay it, sell the snail and buy a HF CRX to put around.

alright, i talked to the guy and he said it shouldnt be a problem. :TU:

so i will most likely order the obx in the next few days.

hey transzex, can you get ahold of any b16/b18 oil rings? i dont know if anyone that has reringed a b-series lately so it will be hard for me to get some.

if you can get ahold of one, please let me know.

thanks