Im curious what are some of your ET times Before and After installing an LSD in ur tranny. Without other changes such as increase in boost, drag radials to slicks ect..

 

You are probably not going to find too many people that would have this information because most people when they are looking to go fast will do this before they run their car.

 

o i c how thats mostly true, there should still b some people who least ran few test tunes than put lsd in annd ran again, cause of now im open diff and have just enough money to purchase lsd or nice set drag rims for my slicks...is it a no brainer to get lsd first? or see what i run without than after i get lsd

 

My car is all motor and I am not making tons of power but with the LSD it made no diff in ET. It did not go any faster.
But it did make my 60ft more consistant. But not any quicker or better 60foots.

 

I found similar results. If the car is scaled well, the open diff transmission, for me, produced similar ET's and mph's as the lsd.

I got to a track with my LSD, blew the trans after the 3rd pass and ran a backup trans with open diff at the same event for 3 more passes. You can't see much difference on the time slips. I thought it was odd and interesting at the same time. I actually thought the open diff car felt easier to drive... I think I remember it that way.

60 might have been better with the LSD. and that's "maybe".

 

when my car ran 11.5's back in the day, i put a lsd in and it went 11.4

it would go 11.5 or 11.6 every pass------ then 11.4 or 11.5 every pass with the diff. the car was consistent as could be and that was the most fun ive ever had with a car!

 

Ive had both lsd and non lsd trans on my
500whp hatch and i run the same times with each of them the only place i can see a difference is on the street the lsd keeps you in a str8 line better than the non lsd...my fastest pass was actually with no lsd...10.9 at 130 last year.

 

But you also have to take in mind temp. And track prep....ive cut 1.60. 60ft with open diff. An terrible suspension...there are alot of factors you have to keep in mind.

 

In a a straight line, you wont notice much but through some corners you will

 

wow, thanks for info guys, i still plan having lsd especially for the street since my car is a Daily Driver and need better traction for street.but for ifo event coming june 27th i guess il just buy some light drag wheels and save for lsd after, and see what i run first without lsd than after i get one!

anyone esle like post their times before and after?

 

I did a 1.8 60ft the first time on slicks at the track. I coulda done better but I got kicked out cause I did a 8.0 in the 8th and I didn't have a helmet. The lowest I've seen is a 1.5 and I have no lsd also stock ls trans

 

I didnt see a difference from one to the other and thats with 100's of passes on both in 10 different cars (N/A, nitrous, and turbo).

 

yeh, I do not have a LSD yet, waiting for my trans to blow to swap in a LS with LSD

 

no lsd here..its consistent for me,id like to compare it with a lsd trans,but i dont see it making much of a difference as my car seems pretty good in the short track.

 

I think that is a poor generalization about when people choose to do differential swaps. Almost every single person tries out and races on the stock trans first, and many stock transmissions don't have LSDs. Often times, budgets come in to play where they have to pick and choose what they wish to modify, and the transmission most often comes in dead last to many people that simply want more power. You can have 15-second cars with Quaifes, and 10-second cars with a bone stock trans, so I don't think it has anything to do with how fast people want to go and when they install the diff.

I think the myth of the E.T. saved with an LSD in drag racing has vastly grown out of proportion, with the common heresay being .500 of a second. Honestly, if you're on slicks, it's not going to help out THAT much on most setups, but will certainly iron out consistency issues, like Joe mentioned, and certainly aid in the longevity of the differential, since the Quaife and MFactory LSDs are much stronger than factory diffs, even the limited slip ones - both helical and viscous.

As far as back to back run data on exact setups, good luck finding that. A lot of people in this sport have a car down to do the diff and then change something else altogether since it's already down - such as a different turbo or cam choice. Or just do the good ole' "turn the boost up." :p

 

i was in the process of buying an lsd or slicks. looks like im doin slicks first. thanks guys

 

i cut 1.8 60ft with GSR trans non-LSD and 1.8 60ft with ITR trans LSD.

 

same here, picked up slicks other day and have just enought to get wheels...but lsd will be forsure next!

 

U also gotta remember too, that some people get diffs just so that they don't blow up their tranny with the weak stock diff.

 

friends car cut 1.7 60 foot open diff but spins 26" slicks at top end running only 11.9 @ 106 with 605whp 480wtq, never made it back with the LSD but would be 10's now based on 1/8 mile and the fact it hooks now, so in that case a LSD would have made a huge difference in time. But also it depends on hp, if the car only made 500whp it might not have been a problem.

 

well most people who are looking to build something serious and want to do it right will buy an lsd that way they don't ruin a transmission because their stock diff blew up. I was just saying that the guy is going to have a tough time trying to find someone with the data he was originally asking for.

 

A quick poll of "Was your first pass on the transmission in stock form (without LSD) or with an LSD installed (stock or aftermarket)?" will show overwhelming results to the former. He wasn't suggesting the modifications that had to be done to the car - if it was a serious build or not - but feedback in general. Could be from a 9.50 car or a 12.50 car.

I agree, though, that it'll be hard to attain exact and useful examples. Joe's may be the closest we get.