been a while, eh? id like to say, chuck is my hero. he works on his cars all winter. when its below 30, my garage is closed for buisness :bowdown:
so anyhow, got some work done on the IRS install today. last yous heard, it was mocked up and most of the tpuppies of the chassis was taken care of. well its all trimmed out now, rear mount is finished, and it sat on its own weight tonight!
(http://i25.photobucket.com/albums/c73/gmby23/87%20turbocoupe/DSC00207.jpg)
(http://i25.photobucket.com/albums/c73/gmby23/87%20turbocoupe/DSC00212.jpg)
(http://i25.photobucket.com/albums/c73/gmby23/87%20turbocoupe/DSC00214.jpg)
(http://i25.photobucket.com/albums/c73/gmby23/87%20turbocoupe/DSC00217.jpg)
im so stoked! ride height came out perfect with only one isolator on the spring. when the rest of the weight is in the car, i may need to add the top one, or switch to some polys, but at least its not too high.
for anyone who forgot i was buildin a car, the rest of my pics are here
http://s25.photobucket.com/albums/c73/gmby23/87%20turbocoupe/
:birdsmily:
awesome looks great!!
that's awesome! Any details on the work involved?q
Cool, glad to see you've made some progress.
How much more work until it's mobile?
I wish I could work all winter....but there are times when even I don't want to be out there messing around. I have a heated garage....but it's also storage...so it makes it hard to get anything else worked on ;)
Impressive!
Nice work! What did you do to the tank?
BTW, I still have that one I got from you, lol.
Very nice work !!! I feel like I've accomplished something when I just swap the rear for a different one that fits in the same spot.Now I don't feel so impressed.LOL.Again,great work.
thanks guys!
i shifted the tank as far left as space would allow, and then folded the pinch weld up on it to allow the passenger side subframe mount to pass by.
trimmed out the live axle bumpstops, a lil bit of the shock tower gussets. also clearenced the tank strap mount on the passenger side for the upper control arm pivot.
i think that covers most of it.
next up is fittin the shocks. now that i have a ride height, i can stick them in there and see how far i need to drop the upper mount to fit properly.
i still need to lay the steel in the floors(SFC), plumb the new MC and rear brakes, and plunk the motor back in before its drivable.....soon though!
What did you do about E-brake cables?
stock so far.
IRS rear calipers use the same type of cable attachment as my TC. i have the cables run thru the uprights and looks like everything is gonna line up fine, but i havent actually hung a caliper on it yet to make sure.
gumby, we need to compare notes sometime. I'm at about the same point as you are. Hmmmmm you had to move the tank over?? I had already taken my tank out when I put my IRS in. I don't know if I'll use a stock tank or not though.
Good work on the rear mount :D
Car looks great :D
Keep us updated with your progress :)
i didnt "move" the tank as much as when i reinstalled it i jus shoved it over as far as it would go.
when i first test fit the IRS i saw it was gonna hit on the passenger side. i then removed the tank and continued with makin the subframe fit the car.
after slappin my walbro in the tank, i stuck it back in the car, pushed it over, and checked the fit against the subframe again. lil work with the BFH and all is well.
in the interim i had purchased a new tank that i planned to modify if needed. ended up resellin the new tank.
mine is also the smaller tank to begin with, so im not sure what tank you started with.
what springs are you using in yours. your cardomain only states 700#
anytime you wanna BS the IRS, lemme know :hick:
Yeah, the hard mount is pretty nice, was that just to avoid the massive modifications necessary to use the stock mounts?
I thought the e-brake mounting looked the same, glad to have someone confirm that.
Did you move your subframe back any by lengthening the forward mounts?
As I see people mess with the tanks so much, it makes a fuel cell look like a good idea with some custom mounts.
the hard mount was to get rid of the squishy OEM bushing and flex from the stock bracket, thus reducing subframe deflection in hard corners and acceleration.
i didnt change the front mounts other than to change the bushings out for poly. i thought about stretchin it, and it was a possibility in the beginning. but after the initial test fit i decided against it. the lost 3/8" didnt compromise my wheel clearences. movin the subframe back would have caused some major interference issues with the tank. best option if a guy wanted to retain the factory bird/cat wheelbase would be a fuel cell, and that is out of my current budget.
also im runnin an extended wheelbase k-member, so having the wheels shifted slightly forward in the rear mirrors the front on my car.
gumby, the springs I used are AFCO springs. I bought them from a "roundy round" shop. I almost bought 800 #ers but thought that they might be a tad too much.
Thanks for the heads up with the tank issue.
I hadn't noticed the 3/8" shortness of the forward mounts. I have tentative plans on installing a MM k-member that has a either a 3/4" or 1 1/2" longer wheelbase. I don't remember right off what their k member has :(
Call me sometime between 8am and 3pm. I work midnights :(
708 271-2369 that be my cell #
Chuck: how's those mounts coming?? No rush :D
John
The K-member adds 3/4" wheelbase. You can add another 3/4" by purchasing their offset control arms.
Depending on what you're using up front, the 800# springs in the rear should be fine.
I haven't had a chance to finish up the upper part of the mounts yet....working on it though ;)
ah, more good spring info! i love spring info. are they jus standard stock car springs?
good to know ive got more options w/o having to decipher aftermarket sn95 drop spring ---> fox bird ride heights if i dont like the 750# rate on these 00R springs ive got, or if they dont balance well with my 400# front c/o's.
The wheel rate for a Cobra IRS spring is 33% of the actual spring rate in the stock location.
If you're using coil-overs, the wheel rate is 50% of the actual rate.
So those 750# stock-location springs are 247# at the wheel (800#'s are 264#)
Your front 400# coil overs are 360# at the wheel and the same as 1440# springs in the stock location.
33%, eh? good to know. i knew the liked ALOT of spring and understand why with the location of the spring on the arm, but i hadnt come across a figure in any of my readin yet.
i knew the front c/o was roughly 90%.
33%, eh? good to know.
i knew the IRS likes ALOT of spring, and i understand why with the location of the spring on the arm, but i hadnt come across an actual figure in any of my reading yet.
went and did some searchin on the almighty CC.com. i found it stated in a couple places that the rear IRS rate should be near 5% less than the front rate for good chassis frequency.
for now my car will go together as is, but in order to get to 5%, im gonna need to either raise the rear rate(1050-1100), or drop the front(275-300). guess ill know after i get it on the road.
Chuck, that's some good info to know about the spring rates. I choose the springs I have by going from MM's spring rate for their sport spring rate, i went with the middle rate. The next one was listed as a Race spring. I too will see how the car sits and rides, of course after I do get the thing running.
Take your time Chuck, not in a hurry to put the engine in yet.
gumby, have you thought about checking the 05'+ shocks to see if they have the rebound /compression lengths that would work with our cars?? I had heard that they would fit but haven't checked it out myself yet.
Cool :D
i havent considered s197 shocks at all. i dont think the lower eye bolt hole is big enough for the stock IRS shock bolt.
plus ive got these 04 cobra shocks and struts sittin here :evilgrin:
I need to get some shocks so let me know how those 04's fit, ok? Oncw my wife finishes her Nursing school in May, look out parts suppliers! :evilgrin: Who knows, maybe I'll get the beast going by next spring. :D