1/4 mile times with slip

[sleeper3]

agreed. I definitely still haven't hit a perfect launch... I think it gets trickier when you add power. not spinning the stock tires is difficult! Tomorrow is intercooler and inlet install day! then maybe I can get to the track next week!

 

[jon619]

lol @ in line with everyone else. I've seen bone stock cars run 14 flat...

He wasn't asking about 1/4 mile times, but trap speeds. Trapping 99 mph is inline with everyone else.

 

[sleeper3]

well, that trap speed will go down when he gets his ET at a reasonable mark.

 

[CnoTataymo]

Not that I expected to be fast or anything (stage 1 flash, motor mounts and coilovers) but it seemed to me that the track was just slow in general. A couple stis ran 13.4's, some wrx's ran 14.2's, new mustang gts ran 14.3's, 2 challengers ran 13.7's and even the fox body's and camaros ran mid to high 13's.

I guess it was all the drivers then. My friend with his 06' WRX with just a downpipe did 13.3 at that track. When he was stock, he ran 13.8.

But yeah, keep practicing on launching. It'll help out a lot.

 

[ericrapp]

Traction

Gawd, it's about time this thread came back to life! WOOHOO for Spring!

The launch is definitely the hardest part. It can be kind of hard to learn to modulate the throttle to not overwhelm the tires. You want to keep them right at the edge of spinning. You should be able to get down to (inconsistent) 2.1 or so 60' times, which would put you knocking on the door to 13s.

I also have lots of trouble with wheelspin, if i could get my car to hook up in second gear my car would get down the track in mid to low 13s. As most of you guys with just a couple bolt ons could do, I bet. But when the boost comes on well it comes on. The 60ft is my weak point. Maybe i need the driver mod! I also am glad this thread lives. Our track opens April 18 so i hope to see if i can improve last years 13.74. I have more go fast parts on since then.

 

[fostersafb]

I guess it was all the drivers then. My friend with his 06' WRX with just a downpipe did 13.3 at that track. When he was stock, he ran 13.8.

But yeah, keep practicing on launching. It'll help out a lot.

The only thing that seemed strange to me is that when I used to run with the Suby crowd I ran 13.7's with my 2.0l WRX with just a basic stage 2 setup and 13.1's with my Forester XT. It was strange, I mean everyone was slow. The only fast cars were a vette, running cams, long tubes, intake and drag radials who hit high 11's and an evo 9 running straight E85 with all the standard bolt ons (387whp, mustang dyno) who ran consistent 11.6's. Other than that nobody was fast. Who knows.

 

[CnoTataymo]

Yeah, who knows. Maybe track conditions weren't that great? I don't know. When I went to watch a few times, I saw some good times for certain cars.

 

[johns]

i ******* hate launching this car. all i do is hop or bog

 

[ericrapp]

wheel hop

i ******* hate launching this car. all i do is hop or bog

a sturdier rear motor mount should fix that for you. Just adding that worked for me. the tires will spin nicely on smooth pavement.

 

[fostersafb]

i ******* hate launching this car. all i do is hop or bog

+1, I have a rear MM and tranny mount and had absolutely no wheel hop just smooth spinning, lol.

 

[john blutarski]

+1, I have a rear MM and tranny mount and had absolutely no wheel hop just smooth spinning, lol.

what tranny mount are you running?

I wonder what kind of 60's we could get with traction bars and slicks

 

[tru-boost]

I still only get 1.8 60' times with the TRZ mounts and slicks. Trust me once you have slicks, there is no need for traction bars. Heat up those tires and they just hook and go. There is no more traction to be had. The car may be able to do better than 1.8 60's but i dont think the driveline can handle it. I launch mine at 3800rpm banging off the 2 step. I dont just dump the clutch though. I really dont think the half shafts and/or differential could handle that. I do a quick slip and i'm off.

 

[fostersafb]

I'm running he Medieval tranny mount along with the TRZ dogbone.

1.8 on a 60 foot is impressive with FWD. Not that I am the ebst driver but the best I ever got with all 3 of my subies, (2 WRX's & FXT) was a 1.9. I would love to drag the car without traction being an issue, just a true display of the cars potential.

tru-boost, what sort of drag wheel/tire setup are you running?

 

[ericrapp]

I still only get 1.8 60' times with the TRZ mounts and slicks. Trust me once you have slicks, there is no need for traction bars. Heat up those tires and they just hook and go. There is no more traction to be had. The car may be able to do better than 1.8 60's but i dont think the driveline can handle it. I launch mine at 3800rpm banging off the 2 step. I dont just dump the clutch though. I really dont think the half shafts and/or differential could handle that. I do a quick slip and i'm off.

your 60 ft i believe is the milestone for us. Very excellent!

 

[FMOS Racing]

Motor mounts made absolutely zero difference for me in terms of wheel hop. Even with a lower mount and a driver's side mount, it'll bang around so hard on the stock tires that the rearview mirror will end up aimed at the shifter.

Wheel hop is primarily caused by compliance in the control arm bushings. That's why the "trailing link" style traction bars some other FWD cars use work so well - they eliminate the lower control arm's ability to "gimbal" in the horizontal plane on the bushings.

I had a 1.85 60' on drag radials last year, I hope to better that a bit this year with a little shorter, better-built tire. I don't sidestep the clutch, either. I agree, that may be way too much shock to the driveline.

By the way, on a good tire the car doesn't wheel hop at all. The sidewalls give enough and the traction is high enough to prevent the sudden unloading of the bushings. Even on some basic 16" wheels/tires (non-drag), there's enough sidewall to provide "shock absorption" and the car doesn't hop.

 

[Zimmer]

I didn't see any difference either in motor mount.

 

[ericrapp]

Maybe i just got better with the throttle. but after i installed just the insert, the car left very nicely. That wheel hop is a violent feeling. I have heard you can get the WheelHop from bouncing off the rev limiter in first gear. so get into second pretty quck!

 

[sleeper3]

I have the SU mount (which is crap by the way) and I notice less engine movement, but same amount of wheel hop...

 

[Zimmer]

you think the wheel hop is worse on the drive train with a stiffer motor mount? The impact has to be transmitted somewhere if its not dampened by the motor mount...

The shifting is better for sure but the wheel hop I see no difference.

 

[sleeper3]

the impact is transmitted throughout the rest of the car. that's why you feel it more.