Bmxpunk's rallycar build

[bmxpunk]

I got the sparco because I found them for $20. Looks like I need to find some rubber

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[anders8]

Check local industrial rubber and gasket companies. There are places that need to make rubber gaskets for pipes that are six feet across, so obviously there's a lot of waste material.

Anders

[sureshot007]

I've got conveyor belt on mine. It's embedded with PVC so it really stands up to getting pelted with rocks constantly.

[Bullet Bob]

Where do you plan to compete?

[bmxpunk]

Originally Posted by Bullet Bob

Where do you plan to compete?

Most of this year will be the Colorado Hill Clomb Association events. I hope to make a NASA rally or two but my first kid will be here in a couple of weeks so family will come first.
Is Idaho NASA sanctioned this year?

Next year, sno-drift is at the top of my list and I am going to work toward that starting now.

[bmxpunk]

New seat mounts move me back quite a bit, coupled with the steering wheel spacer make things a lot more comfortable.

Been learning my way through the ESL software. I had a friend who is proficient with romraider and he was impressed. How does this look for total timing(base plus advance)? This is the stock map by the way.

[sureshot007]

Top axis is RPM and the side axis is...load? It's hard for me to see the picture.

[bmxpunk]

Edited. Now you can see, yes RPM across the top, load down the side.

[bmxpunk]

Quick teaser from the hill climb we did last weekend.

YouTube (Short URL)

YouTube (Short URL)

Found things about the car that I love and a few I want to change.

The Guard Transmission front diff worked flawlessly and kept the front end going where it was supposed to be.

The rear of the car is a little less stable than I would like. I know I need new tires but I think it was a combination of brakes, tires, rear suspension, and an open rear diff that had the back end doing who knows what.

I want a quicker steering rack. I know I need to get used to driving again but I felt my hands were swapping too much for the more powerful car, and besides this rack is leaking so why not upgrade.

My gearing is whack. Basically I am running wrx ratios with 4.11 FD. First is way to short and second and third (most likely fourth, and never used fifth) are too long. I was also the only car without a 6-speed and a diff controller of some sort.

I need a tune. I was down on power from the rest of the class. It wasn't a matter of my particular engine but I was on the smallest turbo running only 11-12psi and even then without a good tune I was giving up something in response.

I am trying to figure out what to do about sway bars. Before the event I added a 19mm front and i liked the feeling of the car more than without any bars. I am trying to find the compromise that won't be too much bar for gravel. Has anyone seen a smaller front bar than 19mm for the 05+ sti?

Any other suggestions welcomed.

[sureshot007]

Power should be last on the list of things to address.

Open rear diff?!! Yeah, I'd take care of that first.

What's wrong with no sway bars on gravel?

[bmxpunk]

Originally Posted by sureshot007

Power should be last on the list of things to address.

Open rear diff?!! Yeah, I'd take care of that first.

What's wrong with no sway bars on gravel?

Power is very last on the list. Making sure the engine runs reliably is a main concern though. I was 2 sec out off 3rd and 4 seconds from 2nd and I know exactly where I lifted and could have made that time up. Those are the places that I wasn't confident in what the car was doing under me and that is what I want to rectify first.

Diffs I would like to square away. I have been looking for a center and a rear but its not easy finding anything for the center of the 5 speed still hanging about. It's also not easy to find the factory clutch type rear diff which I would prefer but may have to look elsewhere.

For me at least, I didn't like the feel of no sways, the car never felt consistent without them. I have been trying to get opinion on says or not for months and haven't found much. The rally anarchy guys seem to say no swaybars but the faster cars at the hill climb had them, I saw somewhere that Evan Cline runs swaybars on his car, of course the SRT usa run swabarss. I know none of that should justify but from a first hand perspective my car felt better after just installing the front alone.

[sureshot007]

What are you running for springs?

And I'd think that a viscous rear from a wrx would be better than nothing.

Chris Atko on sways:

WRC Chris Atkinson explains anti roll bar - YouTube

WRC Chris Atkinson explains anti roll bar - YouTube

[bmxpunk]

Lazy is a good way to describe how the car felt. Thanks for that. From what he was saying and what I felt in the old car, I think some smaller bars would be best. I really liked the 17mm fxt bar from our old car. At least I liked how the car felt.

Springs are what jvab specs the the struts with, 250 front and 200 rear. I would almost like to try something softer just to see the difference.

I agree a vlsd would be better than nothing, and with 4:11 I just need to find one out of an older rs or forester.

[sureshot007]

You really just need an R160 viscous diff. Pull a wrx diff and swap ring gears with the one you have. Done.