e30 m60b40 1/4 mile times!!

[JGood]

Finally got back to the drag strip. Conditions were similar to last time (July 2012), temps were in the mid to high 80's.

The car is 2680lbs, m60b40 with chip, cone filter, full dual 2.5" exhaust w/o cats. 5 speed ZF310 with Clutchmasters FX100 m52 clutch. 235/40/17 Sumitumo HTRZ-II's.

There was tons of grip, the track was prepped great. I wasn't spinning at all, and definitely could have launched with more throttle.

The only change in the car since my runs in 2012, was switching from a 3.25 LSD to a 2.93 LSD.


2013:



2012



At least I was consistent this year. The trap speed sucks even worse then last year though. I've seen stock e34 540i/6's with higher trap speeds. So I'm definitely down on power. Still trying to figure out what's wrong with the damn thing. I may hit up a dyno just to get a baseline to see where I'm at.

[iamsam]

For reference, Todd from TCD ran low 12s in his turbo E28. At the time, I believe he had dynoed close to 400hp and torque.

sounds about right. It took a lot for my buddy's 90s mustang to get into the 12s, which included a complete built from scratch engine making ~300-400hp, and drag slicks, and he barely broke into the 12s.

That said, I still want my E28 to break 12s. Maybe a twin screw... ;)

[senorcarey]

For reference, Todd from TCD ran low 12s in his turbo E28. At the time, I believe he had dynoed close to 400hp and torque.

[iamsam]

using the Fox's calculator, a 2700 lb car w/ 300 bhp should run high 12s to low 13s, which sounds about right.

I'll try to make it a goal to break into the 12s with my E28. Of course it will have the hybrid M60B44 in it, with hopefully over 300 bhp. Obviously I'll also need some sticky rubber, decent suspension and some weight loss.

[Alpina]

forget about ET far too many factors, i would agree with the trap speed using fox's calculator

http://www.stealth316.com/2-calc-hp-et-mph.htm

the s38b38 vert aligns fairly well with the calculator

Thanks.. my goal is to get 12.9x traction have always been an issue,, but the car sprints ahead,,

there was made a GPS calculator.. on the car (( those GPS measurement should be very accurate)) ,,

anyway ,,

calculated i am having 306 hp at the rear wheel and 386 nm/ 284 lbs of torque

The engine is MAF deleted,, and running ALPHA/N ((like S54))

IMO the engine is powerful in HP ,, and LOTS of torque

With these GPS calculation,, some oem cars have been tested ,, and they are showing almost identical numbers as oem figures..

weight.. cd.. tires height of vehicle etc etc .. must been put in the program .. so as correct facts can be used.. as possible

we think that 1:1 gearing is that that shows the most correct result.. this is all based on flying run.. in 3rd or 4th or 5th if vehicle is 6 speed....... ALL CARS goes through the same ......

Some says that different gears should not show different results,, others do not agree

[iamsam]

forget about ET far too many factors, i would agree with the trap speed using fox's calculator

http://www.stealth316.com/2-calc-hp-et-mph.htm

the s38b38 vert aligns fairly well with the calculator

whoa i have never seen that, I will have to play around a little with that later on.

[digger]

JGood, doesn't 13.6 seem slow, since the stock E39 540i/6 is advertised at 14.0? Also, the guy quoted below ran faster with a similar powered motor and much more weight.

forget about ET far too many factors, i would agree with the trap speed using fox's calculator

http://www.stealth316.com/2-calc-hp-et-mph.htm

the s38b38 vert aligns fairly well with the calculator

[iamsam]

JGood, doesn't 13.6 seem slow, since the stock E39 540i/6 is advertised at 14.0? Also, the guy quoted below ran faster with a similar powered motor and much more weight.

i think this is close to facts,,

my S38B38 ,,in a converteble ,,

i have 13.2x @ 107 mph 3.73 LSD Wheels 17"x 9" tires 245-35 @ 36 psi

and the car is 1450 kg or 3200 lbs

[Alpina]

"Stock" E30 V8's with M60 engines make around 13.5 - 14.5 1/4 mile times depending on the suspension and driver. So that's roughly the scale..

i think this is close to facts,,

my S38B38 ,,in a converteble ,,

i have 13.2x @ 107 mph 3.73 LSD Wheels 17"x 9" tires 245-35 @ 36 psi

and the car is 1450 kg or 3200 lbs

[iamsam]

why would a 2.93 give better results? did all the gears seem too short with the 3.25?

[JGood]

[JGood]

That run I hooked up very well. I'll post the time slip tomorrow, but it was a 2.05 60'. It was the only run that I really hooked up. I had two 13.8's with moderate spinning, a couple low 14's with a lot of spinning, and a few 15's that I literally just sat on the line doing a burnout.

I'm confident a 2.93 or 2.79 would give better results.

[knuklehead92]

your faster than the new 370z and same time as the new 335i, pretty good for a 80's car lol

[iamsam]

13.6 @ 103

how was the run? did you hook up well? were you traction limited or power limited?

[JGood]

13.6 @ 103