Swap 1/4 Mile Thread

[JGood]

4-door e30 1988. with m50b25tu+m52b25 crank and rods... 75% interior removed, Toyo R888 at 14.7psi with ZF e34 tranny and 3.65 S diff...

Best time: without reaction 13.868
with reaction 14,308

Couldn't connect good reaction with good pull ;)

Trap speed?

Stock cams?

How'd you like the R888 for launching? I had to take my V710's down to 15lbs or so, and they hooked like hell, but chunked pretty bad.

[mega_t2008]

I don't have trap speed... It wasn't there on the time slip... Cams are stock... Tires slipped a little in 1st gear but for the RWD it's ok :) And, these are 205/55R16...

[SamE30e]

Trap speed?

Stock cams?

How'd you like the R888 for launching? I had to take my V710's down to 15lbs or so, and they hooked like hell, but chunked pretty bad.

You don't factor in reaction unless you're doing bracket racing. For test and tune you could sit at the lights for a minute and it wouldn't matter. At least thats how our track does it.

[Jean]

Something is wrong with the ^ s38, maybe it needs some coffee? lol.....

[Raxe]

Something is wrong with the ^ s38, maybe it needs some coffee? lol.....

I'm probably the one who needs the coffee hahaha, maybe then I could get a halfway decent reaction time. Honestly I'm just nervous about breaking it with hard launches; a broken S38 is a broken bank account.

[Jean]

Reaction time doesn't matter dude :)

[jahnaboi]

4-door e30 1988. with m50b25tu+m52b25 crank and rods... 75% interior removed, Toyo R888 at 14.7psi with ZF e34 tranny and 3.65 S diff...

Best time: without reaction 13.868
with reaction 14,308

Couldn't connect good reaction with good pull ;)

Like everyone else has said. Reaction time has nothing to do with Elapsed Time (ET).

What you are running is 14.308 with or without reaction time.

[mega_t2008]

hehehe... In our country your time is ET+RT, so if I race with someone who has a for ex. 14,5 ET and 0,500 RT his time is 14,5 and if I drive with 14,3 ET and 0,800 RT my time is 14,3 + 0,3 so 14,6 and I lose... And 0,500 is the best reaction which you can have, everything earlier is RED LIGHT and automatically disqualification...

So, on that 14,308 run my ET was 13,868... And RT was 14,308-13,868=0,440 so I had a 0,500+0,440 and that is 0,940...

[e30polak]

Just saw this vid posted on Emotech, impressive time!

12.90 @ 104

http://www.youtube.com/watch?v=XR3TqFuZAb0

[Wh33lhop]

4-door e30 1988. with m50b25tu+m52b25 crank and rods... 75% interior removed, Toyo R888 at 14.7psi with ZF e34 tranny and 3.65 S diff...

Best time: without reaction 13.868
with reaction 14,308

Couldn't connect good reaction with good pull ;)

Why M52B25 internals? Stroke is the same, are the rods a bit longer or something?

[lga714]

Just saw this vid posted on Emotech, impressive time!

12.90 @ 104

http://www.youtube.com/watch?v=XR3TqFuZAb0

Mods?

[328ijunkie]

This thread shows why BMWs make terrible drag cars. Esp E30's. Look at the trap speed vs ET. For reference i ran a high 13 (13.7X IIRC) in my E36 S52 (230 whp, ~3Klbs) at 99-100 mph.

[justin_l_]

This thread shows why BMWs make terrible drag cars. Esp E30's. Look at the trap speed vs ET. For reference i ran a high 13 (13.7X IIRC) in my E36 S52 (230 whp, ~3Klbs) at 99-100 mph.

Point being? I ran a 13.9 at 100 with probably less that 180 WHP. I just think people need more practice.

[328ijunkie]

Well that and IRS is FTL on the strip.

(unless your donovian or radowski)

[justin_l_]

They are good times. Sounds like a good driver. I'd like to see what he could do with a 3.2 liter...

This may finally happen. My roomate just took out a personal loan today for a E30. He is going to be parting his perfectly good 99 M3 to do an OBD1 S52 swap into a clean E30. I hope he lets me take it down the track a few times when I put it together. Maybe I'll tell him it is payment for me doing the swap! ;)