I'm doing some weird custom suspension work, and I need two easy measurements (my car is up on jacks with all the suspension parts removed, so I can't use my own).

Please measure the following and post your results. I'd like stock measurements (not with cut springs) and with P215/65R15 tires (if your tires are different, just include what type of tires you have).

Also include whether you have a firebird or camaro (I don't think this matters, but it might). I hope I can get a couple responses, so I can get an average.

The two measurements:

A) from lowest point of ball stud assembly (excluding grease fitting) on the A arm, to the ground

B) from lower front corner of door to the ground

(both need to be straight down)



Thanks in advance!

 

Z28 or base or T/A or base, or ?
i have that size tires on my 84 Z28

keep in mind weight of drivetrain and also perf or base springs will affect the door to ground measurement

i can get measurements from the 84 Z28 out here when i fire it up after getting the carb rest way on and park it on level pavement

will that work ?

 

On my shop manual BBisn't to the door sill but actually the bottom of the FX...

For camaros 1988
TireSize Model Suspension A, B
P215/65R18 5.0L STD A=32, B=212
P245/50R16 IROC-Z Touring A=26, B=204
P215/65R18 IROC-Z Touring A=31, B=214
P215/65R18 2.8L STD A=32, B=112

 

lemme know if you need measurements off this car out here, i can get them if so.

 

Thanks! Keep it coming!

Yeah, I have a service manual too. Although I can't use their "Z" measurement, I can use the service manual's "J" measurement a little.

But, measuring from the FX is terribly unreliable (IMHO), which is why I asked for the measurement from the lower front corner of the door (which is easier to find and doesn't change). I'm assuming you used the FX (and measured 828 from the center axle) with the numbers you gave me...

Yep. All of the above! I'm creating a custom suspension, so I want to cover all the stock configurations. I will definately be sharing the results of my work in the future. It'll be pretty wild, I assure you.

Also, it would be nice to get some people with a 305ci (5.0L) and a base firebird/camaro (no performance springs, etc). And maybe a WS6 Trans Am? PLEASE?

 

I have a 305 ci engine.... problem is atm I have no way to accurately measure that since I have no easy level ground like a garage or shop floor to test with...

If I get around to finding a place to do that with I will... the other problem is that my drivers door sags about 1/2 inch at the end so I suppose I could measure using the passenger door..

And WTF units is it using? I didn't see anything in the shop manual easy that it said.

 

If you are measuring from the front of the door, and the door is closed, then sag shouldn't really be a factor... right?

millimeters. But, I'm not asking for the GM service manual's measurements. I already have a GM service manual.

As long as you provide the unit (inch/cm/mm), it doesn't matter to me what the units are, because I can easily convert.

 

waltersb, I just tried to use the measurements you gave me. From my estimates, the "A" values should be at least 129mm (and that's with the suspension fully unloaded).

From your other posts, I can guess this: you totally ignored everything I said, and my illustration, and then copied the "Z" and "J" numbers from the GM service manual. EXCEPT, THE GM SERVICE MANUAL IS MEASUREING COMPLETELY DIFFERENT THINGS! The "Z" and "J" in the GM service manual are completely useless to me. They aren't at all what I asked for.

I made this really simple and easy. I even bothered to scan and modify an illustration to show what I need. It takes basically 30 seconds to get both measurements, and you don't have to take anything apart. So where are the replies?

 

No offence dude, I didn't ignore it, don't get yer panties in a bunch...

I looked at the manual and from what I can tell the measurement for the ball joint is supposed to match the measurement at the point on the frame... it appears that it should be the same... ao A is supposed to = J (I think, I don't have the manual here)

I also did mention that it did measure from FX and I said I wouldn't be able to measure it accurately since I didn't have a place to do the measuring accurately.. it's to the millimeter.. I can't do that on the road...

I gave explanations for what I said and why. I didn't know you had a shop manual..

Also, my suspension has 200Km+ on it so it's probably sagged a bit..

 

Well, I made up "A" (it isn't in my service manual), but I wouldn't be surprised if "A" is pretty close to "J".

It doesn't need to be that accurate... according to the service manual, the variance is plus or minus up to 10mm (1cm).