wheel hopping suggestions.

[rocketguy13]

ok me and a friend recently went to the track to see what our supras run. my best time was time was 13.48 at 100.66mph. every run i noticed when i hit second i get really bad wheel hop and have to back out of it to settle the wheels down. also if i hit 3rd too hard it slips but i think thats my clutch disc. any suggestions on correcting wheel hop at the track?

car list: 87 hardtop
japan 2jz with stock 440's
r154 with action stage 3 clutch
garrett t67 with .84a/r
front mount with 2.5" hardpipes
1jz 3" downpipe with full 3" catless exhaust
235/40/18 front 255/40/18 rear
avcr set to 1.08 bar
safc set to monitor with no correction
battery relocated to passenger rear
90 model 3.73 rear diff

 

[hvyman]

how are your traction arms? they tend to bend with hp.

maybe driver? seems kinda low numbers with a 2j and a t67. have you upgraded your fuel system at all?

 

[Moy]

how are your traction arms? they tend to bend with hp.

maybe driver? seems kinda low numbers with a 2j and a t67. have you upgraded your fuel system at all?

he's running on the aristo injectors (440cc), so he's limited to the same hp numbers as a 7m-gte at stock fuel

 

[suprahero]

Get you some Mickey Thompson ET streets and you won't wheel hop...........let me say, mine hasn't wheel hopped since I bought mine, but my Nitto 555r's did it really really bad.

 

[rocketguy13]

yea its pretty much stock fuel. i have to do injectors, rail, regulator, lines, and pump all together so i havent done that yet due to the ammount that it cost. i was also thinking of going back to 17" rpf1's do you think that might help?

 

[ohiosupramst]

yea its pretty much stock fuel. i have to do injectors, rail, regulator, lines, and pump all together so i havent done that yet due to the ammount that it cost. i was also thinking of going back to 17" rpf1's do you think that might help?

Possibly because the 17" wheel will give you a bigger sidewall vs. 18" wheel combo. Most guys on here are running Weld(aluminum racing wheel) 15X8 5.5 backspacing wheels with 275/60/15 MT E/T Streets though.

 

[hvyman]

bigger sidewall tires give better traction for drag. the traction arms are also known to bed with higher hp and hard use.

 

[WhtMa71]

Apparently switching to upgraded rear subframe bushings helps too.

What suspension do you have?

 

[supra90turbo]

Is it just me, or does it seem a little stupid that you're complaining about wheel hop issues, but didn't list any suspension mods, or lack thereof?

If you have stock traction arms, I HIGHLY suggest buying these.

 

[becauseican]

The suspension and bushings are causing the wheel hop. If you are running the original shocks and springs they are most likley worn out. Also the subframe bushing allow for alot of movement, there is almost 3/4" of up and down travel of the rear subframe at the bushings. BIC has some solid subframe spacers that cure the subframe hop, check the BIC section here for details: http://www.supramania.com/forums/sh...w-Product-Solid-rear-subframe-bushing-inserts and they are on sale for only $75 shipped !!!

 

[supra90turbo]

Damn, how could I have forgotten... Follow Randy's shameless plug!

I have the spacers, I was almost disappointed at first with their simplicity, but that's the key! Money well spent

 

[rocketguy13]

i forgot about my suspension mods.... h&r springs and kyb gr2 struts

---------- Post added at 10:25 AM ---------- Previous post was at 10:23 AM ----------

i saw the spacer plates for the rear subframe on driftmotion, but i didnt think that could really help. i guess i could give it a try.