Weight Check in and 3.73 to 3.46 Review.

[jrdeamicis]

Weighed the car at the local dump.

2520 with
Full tank of Gas
Full Interior
No Spare
Lots of weight Reduction
S50
6 Speed (Getrag)
DS1s
M3 Brakes

Im EXTREMELY happy with the weigh in and the car. Complete beast. At the same time I swapped my 3.73 to a 3.46 because someone offered me a trade.

For tearing around town the 3.73 is a FANTASTIC gear for a Getrag or ZF box on the E30 platform. If you never plan on going over 60 (5 speed only) First gear IS usable but a real tire has to implemented to be able to hook up. I was able to hook up and it was gnarly. If I ever blow up this 3.46. I would put a 3.73 back in no problem. Top speed was 166. I have been there a couple times and it has NO problems getting there. The 3.73 really opens up the top end.

As far as the 3.46.

Its still a nice agressive gear and as most said its a perfect mixture of gearing. But another small bump towards the shorter gearing would be nice. I would be interested to compare some acceleration against some of my friends to really see some differences. I don't think the car is any slower. Just a different sort of beast. 3rd gear power slides are still given out like candy. So I approve. 180MPH is the new top speed. We shall see if I can make it there. I see no reason why it would not besides the flying brick thing.

3.73 for some serious oomph.
3.46 for a nice blend
3.25 for mileage.
2.93 for turbos.

[M-technik-3]

Weighed the car at the local dump.
Lots of weight Reduction

Where did you do the weight reduction? My early chassis with swap was 2650 lbs full tank
no driver
no tar in trunk
Half interior
no spare and eu bumpers but also had M tech I hanging all around.

[JeffRR]

Nice job on the weight reduction, #2500 wet is a nice weight target.

Top speed was 166. I have been there a couple times and it has NO problems getting there. The 3.73 really opens up the top end.

Was this an indicated 166 on the speedo?

[surebimmer]

Pictures of your car? Good job.

[lennon]

good weight. what weight reduction have you done? e30, swap or not, hitting 180 kinda makes me laugh. 166 is also surprising. pretty cool, but where did you find a place to open it up like that/how long did it take haha?

[rneedham1979]

1+

good weight. What weight reduction have you done? E30, swap or not, hitting 180 kinda makes me laugh. 166 is also surprising. Pretty cool, but where did you find a place to open it up like that/how long did it take haha?

[JGood]

You have a full interior, what kind of weight reduction did you do to lose that much weight? That's impressive.

Might want to find a set of accurate scales. I weighed my car at a steel manufacturing plant weigh station, and it was over 100lb off of what the drag strip scale said.

Also, was that a gauge indicated or GPS/radar verified 166? Most e30's are around 5% high, some more, some less. My m50 car gauge reads like 10% high.

I am about 110% sure a 230whp car will not be doing 180mph. Maybe if you get to 350hp or so. And I sure hope you have the tires/suspension/aerodynamics to support those speeds, otherwise you will be roadkill.

[2002maniac]

2500lbs is not too hard to believe. My 318is was at 2300 with full interior.

I want to see a vid of the new top speed!

[JGood]

I believe it, I'm just curious what all he did. My m20 track car is 2420 with no interior, just a single 15lb seat and dashboard. I'm looking for creative ways to lose more weight.

[M-technik-3]

2500lbs is not too hard to believe. My 318is was at 2300 with full interior.

I want to see a vid of the new top speed!

There is a big difference in weight between an M42 and a S52 plus the added weight of the six speed. They weigh more than a ZF 310 or 320.

180 mph that's a good laugh.

[Mr Two]

2540 with a 1/2 tank of gas an no driver. Car had full interior minus carpet and rear seat, no spare, no sound deadening left, and weight loss from a full exhaust and wheels.

Also wanting to know what weight reduction you have done

[JeffRR]

160~170 depending on tire SLR is theoritically the highest attainable speed @7K engine RPM (0.83 6th, 3.73 FD and 235/40R17tire) with 0 drag.

In order to overcome the drag at that speed you'd need approx 300ft-lb @ 7K RPM at the engine.

180 in an e30 is going to take built LS1 torque numbers.

+1 on optimistic speedos. mine is ~10% high.

[e30esque]

180 in an e30 is going to take built LS1 torque numbers.

+1 on optimistic speedos. mine is ~10% high.

Or some turbo love. Turbos make torque too!

[bostonbmw]

I think >140mph you will need to measure your speed in knots....

[jrdeamicis]

Ok full weight reduction list. I will post what I removed. Just easier.

Power Steering
ALL AC components.
ALL sound material. (My car had a lot, I mean ALL of it)
All engine pay padding / sound material
Antenna
Spare Tire Tub
Parking Brake System
Spare Tire
Diving Boards (Replaced with Plastic)
A lot of undercoating (Go pressure washer / wire brush)
Double Thick Early model carpet replaced with Late model (There is a difference)
Random Wiring (Antenna, Fog lights, Check panel)

Ill post it as I remember.

good weight. what weight reduction have you done? e30, swap or not, hitting 180 kinda makes me laugh. 166 is also surprising. pretty cool, but where did you find a place to open it up like that/how long did it take haha?

Not that long. Going to colorado springs. We were in arizona. WAY nicer roads than california. I hit the rev limiter @ 7k in 6th.

Why is 166 suprising? My E36 M3 did 155 with 2 extra people and a chip on I5 North (Proven by GPS and rev limiter [3.15 in 5th])

1+

You have a full interior, what kind of weight reduction did you do to lose that much weight? That's impressive.

Might want to find a set of accurate scales. I weighed my car at a steel manufacturing plant weigh station, and it was over 100lb off of what the drag strip scale said.

Also, was that a gauge indicated or GPS/radar verified 166? Most e30's are around 5% high, some more, some less. My m50 car gauge reads like 10% high.

I am about 110% sure a 230whp car will not be doing 180mph. Maybe if you get to 350hp or so. And I sure hope you have the tires/suspension/aerodynamics to support those speeds, otherwise you will be roadkill.

The stock speedo is trash. I don't trust it really. The scale I went to was a landfill. They make there money on accurate measuring. I highly doubt they are off by 100lbs. But I can see a variance of 10Lbs.

Refer to post above ^

2500lbs is not too hard to believe. My 318is was at 2300 with full interior.

I want to see a vid of the new top speed!

Please notice comment on the flying brick part of my post. I am going to run out of power first. But I plan on changing that soon.

There is a big difference in weight between an M42 and a S52 plus the added weight of the six speed. They weigh more than a ZF 310 or 320.

180 mph that's a good laugh.

Why yes. Yes it is. The 6 speed is SIGNIFICANTLY heavier.

2540 with a 1/2 tank of gas an no driver. Car had full interior minus carpet and rear seat, no spare, no sound deadening left, and weight loss from a full exhaust and wheels.

Also wanting to know what weight reduction you have done

Posted above.

160~170 depending on tire SLR is theoritically the highest attainable speed @7K engine RPM (0.83 6th, 3.73 FD and 235/40R17tire) with 0 drag.

In order to overcome the drag at that speed you'd need approx 300ft-lb @ 7K RPM at the engine.

180 in an e30 is going to take built LS1 torque numbers.

+1 on optimistic speedos. mine is ~10% high.

Don't trust the speedo. Its shit. And yes. I will for sure run out of power. But I did do 166. It has maybe another 4mph. MAYBE

Or some turbo love. Turbos make torque too!

I have a friend with a 400WHP turbo M3. Why yes, yes they do.

I think >140mph you will need to measure your speed in knots....

Ahoy matey.


My rev limiter doesn't lie. A set of cams, 3.5" HFM, some injectors, some good dyno tuning and we will see what I can do.

As far as the suspension tires.

Bilsteins on 425/475 Springs w/ 21MM front sway. No rear. Falken RT615s, Poly Everything in the rear. Vorshlag Plates.

Soon to be AST 4100's on 245/35/17 BBS RN 17x8 ET40 with RT-615 shoes. I have the rims just waiting on new tires.

Ill try and post some pics tomorrow.