im getting fairly frusturated trying to launch my 94 at the track!!!, I switched out my street tires of a set of Mickey Thompson ET Street Radials, and started at 18psi tonight and went down in 1psi increments, i went all the way down to 12 psi and didn't have any changes. 60's at every psi from 12-18 were about 2.2xx seconds with conciderable ammount of spin but no hop, these are the exact same results i was getting with my super hard street daily driver tires. I tried staging at about 10% throttle, and once the tree lit up i went WOT, and started spinning like crazy, i let off the throttle to about 75-85% and then got back on it again and it would seem to hook up okay then, but this is still not okay, i cant get off the line with out spinning like crazy and when i let off the car shifts early into 2nd gear, which doesnt help at all. I tried launching a few times at only 65 and 75% but would still spin off the line and the 60's would be even slower (2.3-2.4) Im not sure what to do to fix this issue, even at 12 psi im getting a lot of wheel spin and this is killing my performance. Oh yea, i also marked the tires and wheels with shoe polish and am getting NO slipping of the tire, i am running tubless and used permatex High Tack to glue the tire to the wheel.

As far as tonight goes it was 60* F out side, altitude is 1500', and as far as for burnouts i was bringing the rpm up to 2800-3200 for about 4 seconds, i drove around the water box and kept all 4 dry. I was on the motor all night since i never got the traction to a point where the bottle would do anything good.

I am willing to try any suggestions you may have to help fix this launching problem.

 

What are your suspension mods?

At 22 PSI I dead hook 1.50 or better sixties with the front tires in the air with the same MT DR tires.

 

Must have suspension parts to fix launching issues.

 

Suspension parts give you the ability to adjust weight transfer. I would say at the least if you don't have them gat a set of LCA and a set of lca relocation brackets. Bolt the LCA in the bottom hole. I managed to pull 1.313 60' times on the factory front shocks but that is far from normal.

 

Sounds like your punching the throttle instead of rolling into it. Takes a little bit of foot control to launch properly otherwise you'll just spin all day long.

 

okay, please forgive the new guy who's trying to learn, i know i'll have a lot of basic, stupid questions but i do learn fast

any suggestions

okay, i will look into this, any suggestions on brands that are good quality but wont break the bank, i'm trying to work smart but cheap, definatly on a budget here

Yea, that's kinda what i thought too, soon the last few runs i staged the same and then tried lightly rolling into it, i didn't even get above 80% throttle and 20mph before having to let off to regain traction.

 

start here or 24#
what kind of burn out are you doing? edit reread op more burn may be needed
something doesn't sound right
what kind of stall?
what were you times?

 

I don't think any LCA is really better then another companies. I'm sure your car will see more street driving so I would look at getting a set of double adjustable LCA with poly bushings. You don't really need to buy the adjustable ones but at the same time these cars are mass produced and the rearend is not always centered in the wheel well.

Are you torqueing the car up against the brakes? If so stop right there it loads the suspension and makes it harder to hook. I would hold it at about 1000rpm's and stab the peddle on the last yellow.

 

Okay guys, as i said i'm new to this and have only had this car for about a month now, I just crawled up under it and was looking at the suspension, i think it's all stock but it looks like it may have a torque arm installed, it is not adjustable, is this a stock part or did someone put this on?

 

as far as the burn out goes, im going around the water box, keeping all 4 tires dry, then holding the fot break and holding the rpms at about 2800 for about 4 seconds, im not sure on the stall sice it was done before i got the car, as far as times, i was running about a 13.9 on motor and the street tires or the M/T's, my runs on the M/T were more consistent 13.9 always, on the street tires i was running from 13.7-14.2

yes i was holding it up aginst the brakes, i see how this could be bad now that you mention it, i though with the new tires that they would be sticky enough for this to work, when you say stab the throttle do you mean go right away to WOT or should i try to roll into it slower?

Thanks for the quick responses everyone, i really appreciate it.

 

My car would hook with drag radials by launching from a 1000rpm and going WOT. It would even hook a 150shot right out of the hole. I started with nothing more then the LCA and relocation brackets. If I tried taking it right up against the brakes it would just spin the tires.

It looks like that is the stock torque arm.

 

okay, i'll give that a try, i'll probably be heading back to the track tomorrow, the LCA relocation brackets have to be welded on right? those will porbably have to wait for a bit, if i go back out tomorrow morning where do you think i should start with the pressure up at about 24lbs, or back down to about 15, and try launching with out preloading again. Any idea what i should be looking to spend on the LCA's and relocation brackets, also do i need the LCA's right away or can i use the stock ones with the relocate brackets untill i can afford to get the new arms? Thanks

 

okay so after looking at my summit catalog and online, i'm assuming that the LCA's are also known as trailing arms, what do you think about these brackets, it says that they can be used with stock arms which would help me untill i can afford the new arms.

http://store.summitracing.com/partde...5&autoview=sku

 

I would go with these. I prefer the weld on but these will work. If you choose to you can bolt them on and stop by a muffler shop and have them lay a couple welds on them so they can't move

http://www.umiperformance.com/2012?category_id=125

You can try them without replacing the lca and sees what happens. I bet launching with out preloading the suspension is going to help. I usally ran around 20psi in the dr's I had.

 

ok, i would plan on having them welded in i've got a guy who will do it for a couple of bucks, why the UMI over the Edelbrock, just wondering,