front ride height adj question

[mnez]

Did a couple of searches, but didn't see anything.
Does someone know, roughly, how much 1 turn of the front torsion bar adjusting screw changes the ride height at the fender lip. Not exact, just a rule of thumb guideline.
Thanks,
Mike

[gregwils]

My experience is not a lot. I would guess 1/8th or so.

[r_towle]

I use a block of wood and place it right under the rear of the bar at the adjuster...
not right under the adjuster, but next to it.

then lower both sides to the block of wood.

Its a lot easier than getting up and down measuring.

Remember a few things though
Car will sit differently with a single driver so if you are doing this for racing, put your weight in the seat (a helper or bags of sand)

Once you get to the height you are seeking, you need to align the car because you just changed the front end geometry.

Last point I would make is that too much rack (front lower than that back) in these cars is actually dangerous.

rich

[JAR0023]

I have it written down but can't seem to produce the notebook at the moment. Going from memory I think it's 1 turn equals approx 1/4" of adjustment. I would think torsion bar size and weight of the car would make each case a little different. Don't forget to settle the car after each adjustment. -J

[Porboynz]

On my lightweight 1972 911 2 full turns was close to 3/4 inch lift to get the car back up to legal height, I used to wind on 2 turns to drive on the road then unwind 2 turns for the track. Adjusting the rear each time was a bit more labour intensive....

[Joe Bob]

Be advised that adjustment will change weight settings for balance and alignment.

[mnez]

Thanks guys. Goes for corner balance and alignment next week, after the full polybronze treatment. I want to get my ride height where it needs to be before that. Hoping to minimize the 'turn the screw, crawl out, drive a bit, crawl under and repeat', by getting a handle on anount of change each turn brings.

[McLaren-TAG]

I think you've got a catch 22 going on here since getting the corner balance means raising or lowering the corners to get it balanced, so whatever you change the ride height to now will undoubtedly change when you do the corner balance.

[Joe Bob]

I would suggest discussing the ride height with the tech that does the CB and alignment. You're wasting your time unless you are just doing it to get an idea of how it looks.

BTW going real low is limited by bump steer, bump stops and tire specs.

[mnez]

Originally Posted by McLaren-TAG

I think you've got a catch 22 going on here since getting the corner balance means raising or lowering the corners to get it balanced, so whatever you change the ride height to now will undoubtedly change when you do the corner balance.

Understood, but there needs to be a starting point.

[kidrock]

not to be a thread thief, but I've seen a few different opinions on which direction the bolts must be turned in order to lower/raise the front end.

Lefty/lower, righty/raise?? Or not??

[Joe Bob]

You are aware that the rear requires re-indexing of the torsion bars unless you have adjustable spring plates, right?

[mnez]

Originally Posted by Joe Bob

You are aware that the rear requires re-indexing of the torsion bars unless you have adjustable spring plates, right?

Yes, and yes I do.
Not going real low. There is a min height I need to get in my driveway, which is a bit higher than I would like for track, but oh well.

[McLaren-TAG]

Then why are you compromising the ride height on the P car? Get a sledgehammer to that driveway.

[mnez]

Ah, if it were so simple. It's the incline (steep), not the curb - there isn't one. Great view though.