Swap 1/4 Mile Thread

[justin_l_]

I trapped 100 with my non vanos m50... I'm honestly surprised I don't see higher trap/ 1/4 times still.

[JohnyEndo]

When i had my seta stroker and mark d chip i could get 91 all day, and honestly it didnt feel much faster than stock, + 5 whp maybe

[dcskate102]

I don't even see how that's even physically possible.

My m60 e30, making probably over 260whp/260tq, with a 1.9 60', ran a 13.28@103.5 at Maple Grove at around 70 degrees with no wheel spin (sticky 235's).

I need to go to Cecil. That's the 3rd or 4th super fast time/trap speed I've seen from there.

Cecil is slightly down hill from what I've heard. I'll look around for the slip, this was from last summer. I did spin like crazy which could account for the trap speed.

[digger]

I don't even see how that's even physically possible.

My m60 e30, making probably over 260whp/260tq, with a 1.9 60', ran a 13.28@103.5 at Maple Grove at around 70 degrees with no wheel spin (sticky 235's).

I need to go to Cecil. That's the 3rd or 4th super fast time/trap speed I've seen from there.

hp and weight need to be considered

[JGood]

hp and weight need to be considered

Yes, that's why I made the post. Two cars weigh the same, but one makes less power, and somehow traps a higher speed... And the same ET, with a bad 60' and spinning vs my 1.9 with no spinning.

[golde30]

13.2 at 106 in my s50 m3

2.0 60ft, couldn't launch due to 195 all season tires. Spun through 3rd

3.5'' maf
tune
exhaust
shitty headlight intake
4.10lsd

This was in the dead of summer at cecil, with better tires and cooler temps the car should have done high 12's easily.

Oddly enough the car only dyno'd 193/195, granted it hadn't been calibrated in years after hundreds of passes.

This isn't possible. I watched my friend run his stripped out track e30 m3 w/s52 obd1 ZF 3.25lsd with sunbelt cams and good tires run the same time(13.2) after multiple passes. No way yer on par with that setup.
Same day I ran my s50 with getrag 260 and 3.73 on good tires @14.5.

ZF w/3.25 is almost same ratio as 260 w/4.11...

[Wh33lhop]

This isn't possible. I watched my friend run his stripped out track e30 m3 w/s52 obd1 ZF 3.25lsd with sunbelt cams and good tires run the same time(13.2) after multiple passes. No way yer on par with that setup.
Same day I ran my s50 with getrag 260 and 3.73 on good tires @14.5.

ZF w/3.25 is almost same ratio as 260 w/4.11...

Have you seen any of the other posts... results are all over the map with these cars. Doesn't mean everyone is full of shit. IIRC TinyT pulled a 13.0 out of an S54 E30... that should be waay quicker than MacBudd's S52 car in theory. JGood pulled a 14.4 and Justin_L managed a 13.7 out of internally stock M50s... somehow faster than some S50 cars.

Just the way it is sometimes... crap shoot.

[digger]

Yes, that's why I made the post. Two cars weigh the same, but one makes less power, and somehow traps a higher speed... And the same ET, with a bad 60' and spinning vs my 1.9 with no spinning.

did not see where the actual weights were listed to know they are the same? E30 can be anywhere 2400-3000lb which is upto 20-25% difference. this makes a huge difference to trapspeed.

[digger]

Have you seen any of the other posts... results are all over the map with these cars. Doesn't mean everyone is full of shit. IIRC TinyT pulled a 13.0 out of an S54 E30... that should be waay quicker than MacBudd's S52 car in theory. JGood pulled a 14.4 and Justin_L managed a 13.7 out of internally stock M50s... somehow faster than some S50 cars.

Just the way it is sometimes... crap shoot.

people don't realise that ET doesnt mean much about how fast a car is. the driver, traction, setup play too much of a role to make any significant conclusions

[hoveringuy]

For what it's worth...

e30 w/ M54b30. 3.25LSD, 205 street tires. 2600 lbs.

13.7 @ 103 2.0 60

[JGood]

did not see where the actual weights were listed to know they are the same? E30 can be anywhere 2400-3000lb which is upto 20-25% difference. this makes a huge difference to trapspeed.

My car was 2680 when I ran that 13.3@103. I'm assuming he doesn't have any significant weight reduction done or we would have mentioned it. Even if he managed to get down to 2500, that doesn't explain how my car, with a bigger and broader power and and much more traction, and a better launch, would be slower.

[digger]

i would be looking at your car, there is something wrong if it has 260whp is 2680lb and traps 103, you should be 108-110mph.

you only need 240 crank hp at that weight to trap 103 so his 200whp is close to the money for trapspeed.

an E46M3 trapspeed is 103-105 witht 3400lb and 280whp ish

[dcskate102]

i would be looking at your car, there is something wrong if it has 260whp is 2680lb and traps 103, you should be 108-110mph.

you only need 240 crank hp at that weight to trap 103 so his 200whp is close to the money for trapspeed.

an E46M3 trapspeed is 103-105 witht 3400lb and 280whp ish

Well now that everyone is arguing...

I know for a fact the car did make more power than what the dyno showed. The strange ratio with the ZF could've been a big factor in the skewed numbers along with that old dyno.

As far as weight reduction nothing other than sound deadening removed, rear seat bottom out and no spare. The car was very surprising for what it was, ran down multiple e46 M cars among others.

[dcskate102]

My car was 2680 when I ran that 13.3@103. I'm assuming he doesn't have any significant weight reduction done or we would have mentioned it. Even if he managed to get down to 2500, that doesn't explain how my car, with a bigger and broader power and and much more traction, and a better launch, would be slower.

You're thinking about trap speed way too much, I could've ran the same time with a slower trap and better 60ft. Not to mention altitude, humidity etc etc

[DREWHALL]

I don't know much about drag racing, but I've seen cars run mid 12's with a 106/107 trap. My car "should" be able to do a high 12 without much trouble if I could drive it. It really isn't set up for it at all so that doesn't help getting it off the line. There are so many variables it's hard to say what anything should do until you get it out there and really get used to launching it. I know I would like to get some more weight out of mine :)