Building a e30 for the 24 hours of Lemons

[bam2002]

I was just out looking for the "sweet spot" on a ETA. And I think you are right RE getting out of the powerband.

We still have 5ish months to find a LSD .. we may just put the 410 in at morso to see what happens..

B

[Massive Lee]

For whatever my advice is worth, I think that using a short (4.10:1) diff on an e30 eta will be working against the engine's torque curve. That engine's torque curve shines between 1.5kRPM and 3.5kRPM (where it starts falling). Using a very short diff means it will always be outside of its sweet spot. Maybe a more conservative 3.25 is a better option, along wth a JC chip.

Lee

[ecniv]

Would it be worth it try and get a cheap chip somewhere? With the short gearing it seems like maybe you could benefit from the higher redline...?

It could be.

[Fidhle007]

Would it be worth it try and get a cheap chip somewhere? With the short gearing it seems like maybe you could benefit from the higher redline...?

[sumyungguy]

What's with the $500 rule., How is it enforced. It looks to me like there are a lot of $3000+ cars out there by the time all is said and done.

for all the answers... 24hoursoflemons.com

[1991 318is]

What's with the $500 rule., How is it enforced. It looks to me like there are a lot of $3000+ cars out there by the time all is said and done.

[alpinaclone]

I envy you guys, I wish I had the spare time and money for something like this. It should be a riot.

[bam2002]

Sweet. out own $500 version of Spec e30..
Yep I know AL from the Spec group is going to be there. I guess we will have to find you guys and follow you around the track for a while. Since you will have the home town advantage.

Good point about the brakes. I guess since we will be running street tires that also may be something to cosider RE overpowering the tires. They are cool brakes though..

[Scott///M]

from what I understand...

The race will be 13 hours over 2 days.

the configuration we will be running at CMP, speeds won't exceed much over 90 mph. So no need for big brake kits. Stock rotors and some high performance pads will provide all the stopping power you'll need. It would be smart to have a couple of sets for the front and at least 1 extra set for the back.

Both BeerTech and Malt Liquor Tech will be fielding cars and several other Spec E30 guys have said they plan to build cars as well. I'd say at least 3-4 other e30's will be at CMP LeMons race.

It should be a great time.

[bam2002]

Sumy great info..
However now with the NO Nerf bar rule, isnt the damage to the cars a great deal lower?
I know people were snapping Tie rods and bending struts. I wonder if that is not longer the case since the contact between cars has dropped. Plus they were black flagging cars at Thunderhill.

I will plan on bringing a complete a front subframe- with struts and steering rack. That way we dont have to take the parts off the car..

[sumyungguy]

1 set of pads and rotors is fine.. Generally one set of tires is good enough but you def want to bring a full extra set. Reinforce any of the suspension you can, especially tie rods. Cut your fenders and quarters wheel opening bigger so when they get smashed in they wont interfere with your tires. Bring more than enough fuel.. Its not really 24hours, more like 15 split into two days. The big thing is to not be off the track for very much time, stay consistent and stay away from other cars as much as possible.

Inspiration... This was up here on the 1 mile road course.. averaged 58-60sec lap times for our car...

[Mulholland]

I want to 24 hour race here in texas...who do I have to kill?

[Mulholland]

I'm an e owner and everything I have ever scene points at 3.25LSD diff being the optimum diff to run. Now that i generally speaking making the car flat out faster 60 foot and 0-60, but I'd like to know what gains if any a 4.10 pulls over 3.25 on an eta, redline speed in each gear? speed at 3k in 5th? top speed? a 3.25LSD is supposed to cut a stock eta's 0-60 down to about 7seconds. I Would figure this diff would also do a better job of keeping you in power band at all times for this application as well, no? I am not certain but just thought I would share what I know and understand to be true. Please if you get a chance to check it out, let me know definitively. I know 3.25 in mine kicks. Last night I got into my car and had apparently gotten some greasy fluid lightly across my rubber soles and a slight slip of the foot and my eta broke loose at 4krpm in second...really startled me lol.

[bam2002]

Depends on the track and Noise Ordinance. Thunder hill was 24 hours straight.
SC will be a 2 part. with 8 hours between.
Think TX is the same..

We still will be driving at dusk and need some sort of lighting. Also AM. maybe?

[Justin B]

As I understand it, most of the 24 hrs of lemons really have not been consistant 24 hour long races. More like a couple or few of 7 or 8 hour races, I think.