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The geometry of this rear kit has a lot of adjustment to optimize several areas.
Strut rod adjustments. There are 4 mounting hole locations. This will allow changes to camber gain and roll center height. With the half shafts running slightly up and a 6 inch rear frame height. The numbers are.
Upper hole Camber Gain -1.71 Roll center height 10.65
2nd hole Camber Gain -1.44 Roll center height 8.74
3rd hole Camber Gain -1.14 Roll center height 6.59
bottom hole Camber Gain -.79 Roll center height 4.18
These numbers will change according to ride height.
We are very aggressive on the upper settings. You can minimize static negative camber and still have enough camber gain. By increasing the roll center height the car turns in great.
Another benefit is the assembly is mounted ridged. This allows the rear to plant the tires harder.
Just returned from OUSCI and I must say they car performed great. Finished 18th overall. In the Vintage group I was 1st in speed stop 3rd in autocross and 4th on the road coarse. It is a major relief to not worry about the rear end anymore. I have tortured this thing and have had no issues.
Just returned from OUSCI and I must say they car performed great. Finished 18th overall. In the Vintage group I was 1st in speed stop 3rd in autocross and 4th on the road coarse. It is a major relief to not worry about the rear end anymore. I have tortured this thing and have had no issues.
Any updates on when these 9" rears will be available for sale?
Would anybody know the weights of the standard pumpkin compared to a loaded Currie pumpkin?
I note on the Currie site that the width is 14 1/2 inches between axle flange's which probably doesn't matter much because by looking at the above photo's at least one or both half shafts would have to be made to length because of the offset of the pumpkin, it also looks like one shaft is shorter than the other.
I am thinking if it is possible to fabricate a weld on mount patterned from the original cover that will bolt up to the original X-member that accept's the original transverse spring and also with a snubber bracket as pictured in Kidvette's photo's it could be made as a complete drop in pumpkin so as to keep the rest of the rear suspension in standard configuration.
This would leave what mods the owner wanted to do as far as TA's and suspension setup they want or just leave it standard, but with the ability to change out the centre for repair or ratio change and not to mention the renowned strength of the unit.
Looking at the price of the Currie unit on their website and with a fabricated weld on mount and snubber bracket and whatever the shaft mods need to be this could be a very cost effective alternative to a repaired or strengthened standard unit.
I would think it would be a good income generator for a skilled fabricator to look at.
I would encourage anyone with the appropriate time, knowledge, and ambition to attack a project like this. Be aware that you will need a considerable amount of each. What we have done with our system is not rocket science, but we have figured out a LOT of things not to do in order to come up with this kit. The results have been proven on the track. Yes, you can do it yourself [if we can do it, so can you] but do you want to? http://www.ridetech.com/info/track1/
I would encourage anyone with the appropriate time, knowledge, and ambition to attack a project like this. Be aware that you will need a considerable amount of each. What we have done with our system is not rocket science, but we have figured out a LOT of things not to do in order to come up with this kit. The results have been proven on the track. Yes, you can do it yourself [if we can do it, so can you] but do you want to? http://www.ridetech.com/info/track1/
Thank you for your reply Bret.
I looked at the link to the track1 products and must say your pricing is very good for all of the engineering that has gone into it.
It would be good if a company such as Ridetech with the resources and skills it has to fabricate a unit as what I am suggesting and I am sure it would attract a lot of interest by the people that just want the centre and keep the standard suspension in place.
I am certain there is a lot of guy's on this forum that have the skills and tools to do this, but alas I am not one of them.
Edit: It has been noted else where on this forum that the standard diff is around 85 lbs. with the 9 inch centre alone at around 79 lbs + housing.
Cheers.
Brian.
Last edited by rossi1959; Jan 3, 2017 at 09:07 PM.
Reason: insert new material.
Just returned from OUSCI and I must say they car performed great. Finished 18th overall. In the Vintage group I was 1st in speed stop 3rd in autocross and 4th on the road coarse. It is a major relief to not worry about the rear end anymore. I have tortured this thing and have had no issues.
I think it only fitting that the Lingenfelter name appear on this car as John himself was one of the first to engineer/fabricate an IRS for the C2-C3 Corvette that could stand up to the punishment of a Big Block Chevrolet. Albeit with a Dana...
I realize that this was not engineered by John, but thank you RideTech for taking Johns efforts to this level... it is certainly a fitting tribute to a hot-rodding genius and I know he would be proud of your efforts.
Today I was at my local Tuner shop and there was the usual high end very cool cars. One that caught my attention was a C3 project up on a lift. It didn't look anything special till I noticed it had the full Ride Tech suspension on it. Having seen pictures of it all here doesn't do it justice of seeing it in person on a car. No, it didn't have the 9" rear. I will say that every bit of it looks very well engineered. I liked the Splined Sway Bars, the front looks to be a stock replacement. Is the rear as well ?
. One that caught my attention was a C3 project up on a lift. It didn't look anything special till I noticed it had the full Ride Tech suspension on it. Having seen pictures of it all here doesn't do it justice of seeing it in person on a car.
Fellow forum member "fleming 23" just had 9" rear put on his 71.
If you can swing the cash this is the way to go-that is bad ***!!!
Coming up nearly triple the cost of a solid axle set up but if you have it...WHO CARES????
Nice job RT!!!
The splines sway bars are designed to be used with our kits. I doubt they will work on others
1
Originally Posted by Gale Banks 80'
Today I was at my local Tuner shop and there was the usual high end very cool cars. One that caught my attention was a C3 project up on a lift. It didn't look anything special till I noticed it had the full Ride Tech suspension on it. Having seen pictures of it all here doesn't do it justice of seeing it in person on a car. No, it didn't have the 9" rear. I will say that every bit of it looks very well engineered. I liked the Splined Sway Bars, the front looks to be a stock replacement. Is the rear as well ?
I have been looking at a way to just have a 9 inch centre that replaces the factory diff as a drop in that all the factory drive shafts and suspension components just bolt straight up to.
If the Currie F9 IRS was modified with a flange welded into the back the same as is in the front that the 9 inch centre bolts to, but has the shape and threaded holes to accept the factory style diff cover and along with a boss welded to the bottom for the strut rod bracket and a fabricated snubber bracket bolted to the pinion support flange it should work.
"Tumarr" in Ray Y's thread (https://www.corvetteforum.com/forums...-upgrades.html) modified what I think is a notchback 9 inch housing for his C3 although his is a welded in affair I think with a flange fabricated to accept the factory cover would appeal to a lot of people that just want a drop in replacement diff.
I am not sure what "Tumarr's" width between the axle flanges is but the Currie fabricated IRS is quoted at 14 1/2 inches which I think is close to the factory width, I am not totally sure but I hope someone can inform of the right width between the flanges.
I am not here to knock Ridetech's unit as it is a heavy duty unit but I and I think a lot of others would prefer just a drop in replacement diff.
with the added benifits of strength and easy ratio swap.
I would appreciate thought's on this especially if you can see issues that would be faced.
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