Swap 1/4 Mile Thread

[e30s52]

Alittle slower then what he did. I did almost everything he has too. The things I kept are the sway bars and passenger seat. Everything else is gone though. My run was in the high 12's with slicks.

Edit I dont wieght that much ethier so that might be another possiblity why my times are lower.

[EtaSport]

i want to know how almost everybody here is running mid 13's to 14sec 1/4 in there E30 s50 swapped cars.. i dont see how you all are not running high 12's..

My old E36 M3 ran a 13.55 @ 99.95mph in the 1/4 and the cars weight was 3350 with me in it.

traction, my car has none.

[rpm620]

a fully stripped E30 with S50/52 with all the bolt on stuff should run low 12's with traction.. and the Driver mod.

i know a person with a s50 swap in a full interior car should be able to run low 13's .... the thing that just shocks me is that people are running 14's in E30 24vswaped cars.. i just dont see how. there is also just so many diff little things that can cause it. ie what trans there running and tire size and diff.

im going to be running my S50 with UUC underdrive pullys, chip, intake, full exhaust.. just like it was in my E36.. with the ZF trans, 3.25LSD, DSS 1pc e36 chromoly 3" drive shaft, 16lb flywheel 6puck unsprung clutch.

as for my E30 i have the following removed

- Radio / all wiring
- all speakers and all wiring
- Replaced the Power windows with crank windows
- Sunroof completly gone
- Check panel and all wiring gone
- Evap / heater core gone / wiring / controls
- Every interior panel is gone exept thee dash and cluster
- carpet
- sound deading shit
- all truck shit gone
- replaced factory front seats with aluminum seats
- all trunk stuff gone exept battery.

[Jean]

Probably a lot has to do with the person behind the wheel and tires/gearing....

[Mako18]

Traction? Suspension? lowered car with stiff spring rates, obviously thats half the problem the other half DRIVER. If you look at bmwsob I think he was running bilstien hd's, stock rear springs not ideal but a hell of alot better then the norm.

[MIKe30]

Traction? Suspension? lowered car with stiff spring rates, obviously thats half the problem the other half DRIVER. If you look at bmwsob I think he was running bilstien hd's, stock rear springs not ideal but a hell of alot better then the norm.

I like your sig. Apparently the softer the rear springs, the better the traction.

[EtaSport]

I completely agree with you rpm620. I know my car is a 13 second car, can I drive it that fast? probably not cause im not good at a start, trailing arm suspension with stiff springs and 3.73 gears is what kills me. Car is built for parking lot/track tho. So I'm not too concerned about a 1/4 mile time. There isnt much car out there <$50k that can keep up with mine at speed though.

I also have no weight over the ass end, no trunk trim, removed trunk tar, removed rear seat, removed belts, door panels, stock seats replaced with corbeaus, exhaust is super light.

After I get comfortable with mine I'm building the head and hopefully installing sunbelts. But I'd like to swap to the ZF and longer gears.

[D-rock]

What numbers can you get with a m50 and s52 cams and headers and chip? What kinda of Hp will u get.

[EtaSport]

What numbers can you get with a m50 and s52 cams and headers and chip? What kinda of Hp will u get.

Usually 215-220 crank if it's the correct chip with good intake and exhaust. Thats nearly a 30hp gain.

[e30polak]

Alittle slower then what he did. I did almost everything he has too. The things I kept are the sway bars and passenger seat. Everything else is gone though. My run was in the high 12's with slicks.

Edit I dont wieght that much ethier so that might be another possiblity why my times are lower.

Where's your slip buddy? Seeing is believing. :p

What did you trap? what was your 60-ft? What size slicks were you running?

I completely agree with you rpm620. I know my car is a 13 second car, can I drive it that fast? probably not cause im not good at a start, trailing arm suspension with stiff springs and 3.73 gears is what kills me. Car is built for parking lot/track tho. So I'm not too concerned about a 1/4 mile time. There isnt much car out there <$50k that can keep up with mine at speed though.

I also have no weight over the ass end, no trunk trim, removed trunk tar, removed rear seat, removed belts, door panels, stock seats replaced with corbeaus, exhaust is super light.

After I get comfortable with mine I'm building the head and hopefully installing sunbelts. But I'd like to swap to the ZF and longer gears.

You act like your gearing is aggressive. :roll:

A 260 with a 3.73 is equivalent to a ZF w/ 2.93. Your gearing will only get shorter by going with the ZF, unless you drop down to a 2.79 or 2.73 (can't remember which it is).

As for the question of the low 24v times, it's the chassis itself. The reason why e36 guys put down better times is that their rear suspension is a much better set-up. Plus e36 m3s have wider wheels/tires, less excess weight transfer, etc. They were built around that motor. An e30 was not, and therefore we must compensate for more to make it handle the power as well.

I messed with my suspension alot to get it fairly neutral for different types of driving. I'm running street compound Poly RTABS and rear subframe bushings, which made the ass end kick out much worse. I switched from a 700# rate coilover spring to an e36 m3 eibach sport (420#), and it made it handle & launch better in every respect.

Remember stiffer is not always better. Along with my 235/40/17s and a 100+ lb sound system, I can launch my car very well in the street. I also launch my car at a fairly low rpm because of my 3.46 rear end, at around 2300. I slip the clutch just a bit and I end up with minimal wheelspin in first. I know things are much worse on the track, so I will have to see how it goes when I finally make it.

[e30s52]

Where's your slip buddy? Seeing is believing. :p

What did you trap? what was your 60-ft? What size slicks were you running?

I can grab my slip during thanksgiving sence its in my room in wa. But I have a ZF tranny, 3.46 lsd rear end, soft spring in the rear with old crappy bilstiens, and I think they are 15x8 or 9 slicks that I barrowed off my friends car. It was a high 12 and my reaction time was .004. I passed the the line doing 108 or 110 or somthing like that. If you come to the picnic this year I will do a pull next to your car ;)

[e30polak]

I can grab my slip during thanksgiving sence its in my room in wa. But I have a ZF tranny, 3.46 lsd rear end, soft spring in the rear with old crappy bilstiens, and I think they are 15x8 or 9 slicks that I barrowed off my friends car. It was a high 12 and my reaction time was .004. I passed the the line doing 108 or 110 or somthing like that. If you come to the picnic this year I will do a pull next to your car ;)

I'll be a little lighter, with cams by then. And I'm sure you'll have at least the same. ;)

What was your 60 ft with the slicks?

[e30s52]

I'll be a little lighter, with cams by then. And I'm sure you'll have at least the same. ;)

What was your 60 ft with the slicks?

Already have cams and possible a supercharger by the end of the year. I dont know but it was really good sence they just sprayed the track down when I went. I beat a gt500 on my pass lol.

I will see if my dad can find it so I can post it up.

Another edit I talked with him a few minutes ago and he found one with a 2.19 he said but that might from another car sence we ran his car, and then my uncles charger too.

[EtaSport]

I used to run an m50 with getrag 260 and 3.25.

260/3.73:
3.83 1st torque applied: 14.29:1
2.20 2nd-8.2:1
1.40 3rd-5.2:1
1.00 4th-3.73:1
0.81 5th- 3.02:1

zf/2.93:
4.21 1st torque applied12.33:1
2.49 2nd-7.3:1
1.66 3rd-4.86:1
1.24 4th-3.63:1
1.00 5th-2.93:1:1

zf/3.25
4.21 1st torque applied: 13.68:1
2.49 2nd-8.01:1
1.66 3rd-5.4:1
1.24 4th-4.03:1
1.00 5th-3.25:1

So yes I do have somewhat aggessive gearing considering how freely the s50 revs. Its all in the first 2 gears, they are too short. My first gear is only slightly longer than yours if you are indeed running a ZF with a 3.46. The most common ratio is a 3.25 which is probably what I would use, if I decided to switch, but there is no real reason to.

[D-rock]

Usually 215-220 crank if it's the correct chip with good intake and exhaust. Thats nearly a 30hp gain.

So thats almost an s52 so is it really worth it to re swap?

God im getting a new diff! And i couldnt find if i had a zf or not! But all i know is that thing was so shinny and silver looked new. :/