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That’s weird. I don’t think the swap pushed my tire as far back in the wheel well as yours. My wheel is favored to the rear though and with the 28” slicks I had to clearance the back of the wheel well liner.
DI you have the c5z trans before? Is the ME2 the base/c6z gearing?
Yes a had a C5Z M12 before, it's just too aggressive for what I do, i was designed for a 400hp n/a track car after all
the ME2 has a 2.26 first, MH3 2.29 base/C6Z 2.66, M12 2.97
so coming from an M12, the ZR1 gearing sounds way too long in my head, but now in the real world. i think it MH3 is perfect, and I wouldnt be against the ME2 either.
Hell of a race! I have the same tire on my car. It seems to be good when they are nice and warm. Spins a little at other times. I am procharged not turbo though. I also have a c6z tr6060
That’s weird. I don’t think the swap pushed my tire as far back in the wheel well as yours. My wheel is favored to the rear though and with the 28” slicks I had to clearance the back of the wheel well liner.
Just an FYI if your looking for a mounting solution you can get a late model subframe and use the stock diff mounts. I used the sub frame out of a zr1 and the stock diff mounts would have worked fine in the second set of wholes. I used the RKT mounts because I already had them and the stocks were ripped.
Just an FYI if your looking for a mounting solution you can get a late model subframe and use the stock diff mounts. I used the sub frame out of a zr1 and the stock diff mounts would have worked fine in the second set of wholes. I used the RKT mounts because I already had them and the stocks were ripped.
2020 Corvette of the Year Finalist (performance mods)
C5 of Year Winner (performance mods) 2019
I wonder if the cradle is the factor that determines whether or not the wheels get pushed back... the cradle I used only has one set of mounting holes per side instead of 2 and I had to use rkt offset mounts, my wheels are pushed back just a tad but not near as bad as others I have seen... I am also using coilovers and stock c5z upper and lower lcas
I wonder if the cradle is the factor that determines whether or not the wheels get pushed back... the cradle I used only has one set of mounting holes per side instead of 2 and I had to use rkt offset mounts, my wheels are pushed back just a tad but not near as bad as others I have seen... I am also using coilovers and stock c5z upper and lower lcas
I have the ZR1 dual mount cradle and stock C5 LCAs with coilovers. My understanding is that the C6 cradle requires the C6 LCA's if you retain the monospring. This setup moves your rear wheels back just over 1/2".
Using coilovers allows the use of the C5 LCA's which locates the rear wheels correctly.
The 3 mounting points on the control arms between the C5's and 6's are exactly the same and changing from a C6 to a C5 control arm won't affect wheel placement at all. The difference is in the cradle mounting points.
The 3 mounting points on the control arms between the C5's and 6's are exactly the same and changing from a C6 to a C5 control arm won't affect wheel placement at all. The difference is in the cradle mounting points.
Many idea why some people seam to have the wheel pushed back further than others?
I have the ZR1 dual mount cradle and stock C5 LCAs with coilovers. My understanding is that the C6 cradle requires the C6 LCA's if you retain the monospring. This setup moves your rear wheels back just over 1/2".
Using coilovers allows the use of the C5 LCA's which locates the rear wheels correctly.
Car looks awesome. What’s the black stuff on the under side of the hood?
Although the C5 rear cradle appears quite different from the C6 rear cradle, the four frame mounting points are identical, and the cradles are actually interchangeable between the C5 and C6 Corvettes.
And both of them may be used with our adapters.
However, there is one critical difference that builders utilizing either the C5 or the C6 IRS should be aware of. In 2005, with the advent of the C6, Chevrolet lengthened the wheelbase 1.2" (From 104.5" to 105.7".)
They accomplished this with a little tweek in the rear suspension geometry. The lower control arms and their mounts were moved enough to relocate the rear spindle 1.2" rearward. This is important to remember, especially when designing your rear frame and locating your axle centerline within your rear wheel opening.
Please note in the photo below: The 8.0" dimension is for the C5 and the 9.2" dimension is for the C6.
Last edited by Millenium Z06; 09-08-2019 at 05:13 PM.
Many idea why some people seam to have the wheel pushed back further than others?
As far as I know, I'm the first to do this swap and since then, I've been involved in many of them. I've set lower control arms on top of each other and side by side, taken measurements and installed both without seeing any change. I've also played with the cradles side by side and it's easy to see that the LCA mounting points are in different places, relative to the mounting points of the cradles. One thing that I've noticed is how much the rear wheel position can be moved rearward or forward from simply playing with the eccentric bolt in the front of the lower control arm. Once that's got the wheel as far forward as it can go, the rear tie rod will need adjusting to get the toe straightened back out. It's too bad rear camber can't be adjusted more easily.
If we had the mounting scheme of the C6Z's, we could use spacers between the tie bars and mounting blocks. I'm actually considering cutting off the mounting ears, machining some blocks and welding them on some day so I can play. Too many irons in the fire at the moment so it'll have to wait for another day.
08-22-2019, 11:13 AM
