i have a b20vtec, ''allmotor'' EF hatch putting down the mid 190's wheel horsepower... It has traction bars in the front, hasport mounts, 6 puck clutch and all that, with some Sportline springs and oem shocks. I recently bought some drag radials for it as well, because on street tires all it does is spin the tires straight to redline in 1st and 2nd (at the track and on the street). I've only taken it to the track twice this year, and it was knocking on the door of running 13's but I was/am trying to work on getting the 60ft's cut WAY down because I know that will probably be the biggest thing in helping me achieve my goal of running 13s with it.

My issue is, when i took it out on the drag radials, i set them at around 20psi and did a nice burnout to warm them up. I get to the line and did just a baby-launch i guess you could say, which was around 2500 and a slight pre-load and i got nothing BUT wheelhop like crazy all through my first gear ...trying to figure out what I may have done wrong. the track time where this run happened was a 14.2 @ 101mph with a 2.49 60ft time due to all the wheel hopping. Could it be that my suspension is the culprit at this time? I am thinking about picking up some full coilovers to see if that will help fix the wheel hopping issue. I also am 100% sure, that i will need more seat time too lol I only got to get out to the drag strip 2 times this year and I dont do much street racing anymore either lol. When i take the car out next year, im really hoping to make my goal of 13.9 or better.

Some people even told me that I had the tire pressure set too high in the drag radials, and that right around 15psi is more like what i would've needed to keep the wheel hopping down. The ''radials'' im speaking of are Nitto NT01's.

 

SUSPENSION

 

Suspension isn't necessarily the entire problem. Some guys are running stock suspension on their cars and cutting 1.6's and lower. Granted those are turbo cars.

I'd launch the car a lot higher and lower the tire pressure in your drag radials. What is the car tuned on? Can you setup a 2-step?

 

I'd have to agree with tire pressure or even the traction bars not being setup right. My car only has some blox drag coilovers and innovative traction bar. Still has crusty old oem bushings that flop all over the place. Best 60' on slicks was 1.7 on motor 200hp

Try starting at 12-14psi cold with the tires, go over the car check for any excess slop in the front. You could have a bad ball joint or something. All motor cars like high rpm launches and you def should preload.
Launching on street will never be close to a prepped track, but see what that does for ya.

 

My EF is boosted, but I just went 12.5@107 with a 1.7 60' with stock 20y/o bushings, eBay coil overs on skunk2 sport shocks. I'm thinking you need less psi in the tires.

 

Less pressure, higher rpms.

 

Well, the biggest response overall seems to be that I do need to launch my car much higher in the rpms, I do have and did at the time had a launch control at at 5500rpm but I was semi-afraid of something going wrong or breaking from that high of an rpm. I launched from the lower rev because I figure that launching higher would only amplify my wheel hopping and potentially cause me more hurt than help.
And yes, my traction bar is adjustable as well, I'm not sure how one would set it up for the track, I currently have it set just so that all the slack has been removed but not too terribly tight.

Ill for sure be trying all of you guyses suggestions and I'm probably gonna see about picking up some omnipower drag coils somewhat soon and seeing how that goes too

 

Somehow I missed the 2500 rpm launch. I launch at 6k with slicks. Try 5k and see what happens. I street tuned my car on drag radials, but never launched on them

 

Lower the psi from 12 to 15 what size tire is it if the wall is not thick enough that could be a big problem

 

Launched it way to low the tires are sticky and your barely getting them moving so they are just biting at the track

 

Launching high rpm won't be bad for it. I've been on stock trans/axles/diff for a while with 350hp nitrous b. With slicks too. I was launching at 7500 and the car gets out pretty hard.

With the higher rpms just slip the clutch a tiny bit, the tires will start to turn faster, and if they spin they will spin fast, the slower spin of the tire is what causes the wheelhop as it spins then grabs a little then spins then grabs and so on...

 

Ahhh I see I see.... @wreckeddc4, makes sense. Lol. I was thinking the suspension being too soft and allowing for hop was creating my problem.

Size of the radials is 205/55/14, mounted on some 14x5.5 steelies.