Swap 1/4 Mile Thread

[evangreen]

I did mine on a g-tech
m52 obd1 conversion AA chip
12lb fly
spec stage 3 clutch
getrag 260 3:73 lsd
205/50/14 crappy old and hard tires
gc coil overs 500 front and 650 rear (not that great for launch)
weighed in at 2750 with me in it, im 155
cant get good 60's ill have to try again with some better tires
also will be throwing in s52 cams and a trm tune soon hopefully getting into the 13s

Also haven't practiced much need to get some open space to get a few more runs in

60' 2.94 @28.2
30' 6.83 @61.9
1/8 9.96 @80.8
1000' 12.53 @95.6
1/4 14.64 @105.9

said peak wheel hp was 205

[PiercedE30]

I did mine on a g-tech
m52 obd1 conversion AA chip
12lb fly
spec stage 3 clutch
getrag 260 3:73 lsd
205/50/14 crappy old and hard tires
gc coil overs 500 front and 650 rear (not that great for launch)
weighed in at 2750 with me in it, im 155
cant get good 60's ill have to try again with some better tires
also will be throwing in s52 cams and a trm tune soon hopefully getting into the 13s

Also haven't practiced much need to get some open space to get a few more runs in

60' 2.94 @28.2
30' 6.83 @61.9
1/8 9.96 @80.8
1000' 12.53 @95.6
1/4 14.64 @105.9

said peak wheel hp was 205

WAY, WAY off.

[evangreen]

I believe the mph is calculated from gps, which is less accurate from a specific point than at a constant speed, like i said not a track but an electronic device

[416stroker]

Take it to a track your not that faraway from one. That's way off I wouldnt even have posted that.

[bimmerboy02]

What's up with the launching problems? I know rear trailing arms and 205ish rear tires aren't ideal... but I could still hook in my e30. Open diff too. If I dropped the clutch it would just sit there spinning, but I practiced a hard slip and I could go from 3000+. Is the track that much slippier?

[Mako18]

Most are running lowered cars and stiffer than stock spring rates. Neither of which is helping anything. Stock springs in the rear with some bilstein HDs would be a decent setup on the cheap. Also a proper tire compound and prep, pressure, launching technique all factor in on that intial bite or hook etc...Its been my expereince you want a bit of wheel spin then a nice firm hook and a slap in the back of the head from the headrest letting you know you did a good job at the line. I know E30s are not drag cars but they are fun to drag race anyway....

[416stroker]

What's up with the launching problems? I know rear trailing arms and 205ish rear tires aren't ideal... but I could still hook in my e30. Open diff too. If I dropped the clutch it would just sit there spinning, but I practiced a hard slip and I could go from 3000+. Is the track that much slippier?

Tracks are a lot more slick than the street its a big diff I can launch around 2500 with a lill slip of the cluth on the street but my local track I cant launch for shit I pretty much roll out then stab it.

It depends alot on the track some tracks might prep the track before the street legal drags but some dont. I know if i go to a summit series race at sac race way the drag the track and spay it with vht threw the 60foot for the high horsepower cars. But then again I dont even think theyd let me run my car in that series.

[loonibab325i]

ran a 14.30 with my car, honestly i'm a bit dissapointed, i was hoping to actually breach 12's but i was far from that, hooking up was pretty much pointless, I was getting wheel hop and still spinning tire at around 50 mph... had 2 clean runs, the other 2 where bs, one of the runs the wheel hop caused my car to bog and die while another time the car bogged going into third due to wheel hop in second.. anywayyy

1991 318is
s52 obd1 w/TMS cam kit.
3.25 lsd w/ 235/35/17 tires

[e30polak]

ran a 14.30 with my car, honestly i'm a bit dissapointed, i was hoping to actually breach 12's but i was far from that, hooking up was pretty much pointless, I was getting wheel hop and still spinning tire at around 50 mph... had 2 clean runs, the other 2 where bs, one of the runs the wheel hop caused my car to bog and die while another time the car bogged going into third due to wheel hop in second.. anywayyy

1991 318is
s52 obd1 w/TMS cam kit.
3.25 lsd w/ 235/35/17 tires

WTF?! :hitler:

A 14.3! What did you trap? Get some drag radials and try again!

With the way you ran against that 335i, it's pretty mind boggling that you weren't in low 13s at least...

[xlr8rbob]

damn abe, you beat me to this thread.

ran a 15.2 at 91mph. i was kinda disappointed too. both abe and i just spun off the line most of the time. a couple of runs i pulled a fast and the furious and missed second gear.

oh well, it was just for shits and giggles. with some proper tires and better launch technique, i know i can pull low 14s. woulda had some video but forgot to load memory card into camera.

1989 335!
b35 m30/jc chip
3.73 gear 215/40/16 bfg gsports

[EtaSport]

ran a 14.30 with my car, honestly i'm a bit dissapointed, i was hoping to actually breach 12's but i was far from that, hooking up was pretty much pointless, I was getting wheel hop and still spinning tire at around 50 mph... had 2 clean runs, the other 2 where bs, one of the runs the wheel hop caused my car to bog and die while another time the car bogged going into third due to wheel hop in second.. anywayyy

1991 318is
s52 obd1 w/TMS cam kit.
3.25 lsd w/ 235/35/17 tires

That set-up is def. capable of 12s in my opinion. I just added the stage 2 kit to my s50 and it feels like a low 13, but it seems all of us with street tires have wheel spin issues. Im even running 205s. If I can get my falkens hot enough though they dont spin quite as much.

[jrdeamicis]

Ok just for a comparison, fishforlife (bimmerforums) in his LTW m3 ran an 12.236 @ 112.38.

But he has a little less weight then our e30's.

[e30polak]

Ok just for a comparison, fishforlife (bimmerforums) in his LTW m3 ran an 12.236 @ 112.38.

But he has a little less weight then our e30's.

And a better suspension+tire setup up for launching his car. Plus he is an amazing driver.

That set-up is def. capable of 12s in my opinion. I just added the stage 2 kit to my s50 and it feels like a low 13, but it seems all of us with street tires have wheel spin issues. Im even running 205s. If I can get my falkens hot enough though they dont spin quite as much.

I concur! If e30lolz on BFC can run a 13.07 w/out the cam kit in his s52 e30 m3, then loonibab should be in the high 12s for sure with better tires and a more appropriate suspension!

After looking at all the numbers, I doubt I'll break 14s my first time, since I've never done a 1/4 mile on a real drag strip. I have traction issues already with the 3.46 in the streets, I can't imagine on the strip. I beat a lot of cars off roll, but I don't do much racing from a dig b/c I just sit and spin. What rpms is everyone launching at? I feel that I'd have to feather the gas and side step the clutch to really perfect my launch.

Nevertheless, I have some soft springs I can use in the rear to help me squat better. I think my KDWs have enough tread life left on them to hook up pretty well. My rear end is too stif for launching right now, The poly subframe and RTA bushings, along with my spring rate and shocks wil probably keep me spinning through third. Plus I know I'm not any better of a driver compared to some of you...

I remember my car weight transferred and launched much better with the eibachs and stock bushings....hmmm well maybe I can get ahold of some used drag radials and hit the strip soon!

[SamE30e]

Has anyone run a stock M50 non vanos?

[416stroker]

Has anyone run a stock M50 non vanos?

ya I ran a 14.8 the only time I went with a stock n/v. It can do better it had a vacuum leak.