Post your 40-70mph acceleration

[surebimmer]

S52 obd i swap
24# injectors
Underdrive pulleys
3.5 HFM
UUC 8lb flywheel
Eurosport Software
ZF trans with 3.25 lsd

40-70 4.3 with full tank of gas and pass riding along

[10/10ths]

I thought this looked interesting so I tried it today.

I did it three times from third gear on level road with a stopwatch.

M20
4.10 LSD
Miller MAF
IE Headers, no cat, Tri-flo
14" Baskets
1/4 tank of gas
2800 total weight including me

4.4 seconds 40-70mph (give or take a tenth)

[Jean]

I thought this looked interesting so I tried it today.

I did it three times from third gear on level road with a stopwatch.

M20
4.10 LSD
Miller MAF
IE Headers, no cat, Tri-flo
14" Baskets
1/4 tank of gas
2800 total weight including me

4.4 seconds 40-70mph (give or take a tenth)

Wow nice! Really close to the S52 times!

[10/10ths]

Ya, I was happy with the results. The 4.10 makes a pretty big difference and the motor in this car is very strong. Combine the lightish weight and a few bolt-ons and its not too bad as far as acceleration goes.

I would be interested to see the numbers on a similar M20 car without a 4.10.

[02stu]

I thought this looked interesting so I tried it today.

I did it three times from third gear on level road with a stopwatch.

M20
4.10 LSD
Miller MAF
IE Headers, no cat, Tri-flo
14" Baskets
1/4 tank of gas
2800 total weight including me

4.4 seconds 40-70mph (give or take a tenth)

No kidding, my 2.8L m52 with an OBD 1 swap and a similar exhaust setup was .6 seconds slower, and I have 225 hp and a 4.10.

[MIKe30]

No kidding, my 2.8L m52 with an OBD 1 swap and a similar exhaust setup was .6 seconds slower, and I have 225 hp and a 4.10.

i think his MAF combined with the dif is what is giving him that nice umph. too bad the car wont go past 125 tho :p (or something around there haha)

[02stu]

A 260 transmission with a 4.10 is probably right in the power band in third gear at 40, unlike the rest of us which start pretty far outside of it. Never the less thats a great time talk about bang for your buck. I want to see some turbo setup times

[Jean]

Someone with M30 needs to post their times!

[digger]

I thought this looked interesting so I tried it today.

I did it three times from third gear on level road with a stopwatch.

M20
4.10 LSD
Miller MAF
IE Headers, no cat, Tri-flo
14" Baskets
1/4 tank of gas
2800 total weight including me

4.4 seconds 40-70mph (give or take a tenth)

sorry there is not a hope in hell mate.......

E30 325i Stock do 6 sec throught the gears (2.4s 60-70 in 3rd)
Hartge H35 (260hp) does 4.6s through gears.
210hp 2.7 M20 does 37-62mph 5.3s (60-100kph) 3rd.
E30M3 Sports EVO 4.7s through gears

4.11 doesn't do a whole lot perhaps 2 or 3 tenths in the 1/4 and a mph or two which is much less than people think.

so your obviously measuring wrong or your speedo is out but likely both.......


Generally

60-80mph in 3rd is a much better measure as your in your powerband and MM have a whole list of data to compare to for a whole bunch of cars

http://www.metricmechanic.com/catalog/performance-specifications.php

Seriously the accuracy of any of these measurments is poor so take it to the track and post your slips that way the numbers are correct and means something.

[10/10ths]

I'm willing to do it again, this time with a passenger, preferably a r3v member so I will have a witness. Nando lives the closest to me, I'll see if he's interested, or there are others. Actually, he has autocrossed my car before so he already knows its speed in general. It actually may be closer to 2700 pounds with me in the car.

It is somewhat difficult to do on my own and I could be wrong, but I will post a 2nd attempt soon.

BTW: My car tops out at 132ish...not because it runs out of revs (still around 500 left before redline) I blame the lack of aero effeciancy compared to power. If I had more HP, say an M3 swap, it would power through it.

[nando]

I've been in his car, I can easily believe it's faster than mine.

I measured mine with a laptop connected to megasquirt and got 5.5 seconds, with accuracy down to .1mph.

none of you guys testing with a stop watch are really going to get good accuracy, and basing it off the speedo reading doesn't help either.

and above 130 is where most of our cars will peter out. Mine gets to 135 and slows way down. of course as a stock automatic, getting to 115 was an amazing feat. :p

[etxxz]

my first post on this thread says i ran just short of 6seconds on a bonestock strong m20 (i can redline my 5th) and 4.10 gears on smaller than stock tires 195.60-14s so with his upgrades i believe that 5.5~5.3 is really pushing it with his mods. please time again

btw my m20 came out, have the s52 on the hoist asking for a few hours of my time :D

[nando]

my first post on this thread says i ran just short of 6seconds on a bonestock strong m20 (i can redline my 5th) and 4.10 gears on smaller than stock tires 195.60-14s so with his upgrades i believe that 5.5~5.3 is really pushing it with his mods. please time again

btw my m20 came out, have the s52 on the hoist asking for a few hours of my time :D

I think you missed the part about his car being gutted. I think he removed something like 200lbs from it. My car on the other hand is complete except for A/C..

[etxxz]

i didnt, there's only so much 200lbs can do for that 30mph pull...my car is stock and has all of that stuff. i'd be interested to see his re-run otherwise that's a hella quick m20

[02stu]

sorry there is not a hope in hell mate.......

E30 325i Stock do 6 sec throught the gears (2.4s 60-70 in 3rd)
Hartge H35 (260hp) does 4.6s through gears.
210hp 2.7 M20 does 37-62mph 5.3s (60-100kph) 3rd.
E30M3 Sports EVO 4.7s through gears

4.11 doesn't do a whole lot perhaps 2 or 3 tenths in the 1/4 and a mph or two which is much less than people think.

so your obviously measuring wrong or your speedo is out but likely both.......


Generally

60-80mph in 3rd is a much better measure as your in your powerband and MM have a whole list of data to compare to for a whole bunch of cars

http://www.metricmechanic.com/catalog/performance-specifications.php

Seriously the accuracy of any of these measurments is poor so take it to the track and post your slips that way the numbers are correct and means something.

Thats a great link, the 60-80mph run could not be better suited for my gearing. At 80 I am just touching redline in 3rd. I did 4 or 5 pulls all under 4 seconds! Much of that time is to thank for the gearing though, it was also pretty cold outside, around 50 degrees or so.


Also remember a 4.11 does not produce a great 1/4 mile time because you have to shift more, during a 3rd gear run shifting doesn't come into play. I am kinda surprised that he can make it to 70 in 3rd though, I have ridden in 2 325is with 4.10s dropped in and they cut out before that.