LSA/Grand National Conversion
http://www.crateenginedepot.com/LS9-...10803C556.aspx
Here are some measurements and pictures.
Pass side head is 3/4" from firewall. CTS-V oil pan sits 1/2" below crossmember, but the DSE frame stiffeners are lower then the oil pan.
I used the Spohn adaptor plates with F-body engine mounts.
Finished at Nicks shop and delivered her running to Rob at Forced Induction Tuning last Tuesday. We decided that the best fit and look was going to be smaller twin turbos.
Should see some progress this next week. I'll get some pics.
The Best V8 Stories One Small Block at Time
Andrew
We have been going back and forth with either one or two turbos, but the advantages of twins(if doable) are huge for a street machine(not drag car launching as high rpm where boost on a single huge turbo is easy). Faster spool and allows the super charger to suck in air easier in lower rpm range. After getting the car to the shop last Tuesday, we had to play around with some single and twin turbo's to determine placement. We came to the conclusion that twins would look and fit great!
Forced Induction Tuning has been doing this to the Cadillac CTS-V for a few years with great results. I wanted a GN that idles like glass, but have fun when I want.
So twins with water-to-air intercoolers. One for the supercharger and on for the twins.
Some people speed up the supercharger using a smaller pulley, but that is more heat with no additional cooling and max aprox 100-150hp additional without a cam to mate it with. To overcome the heat issues we use water-to-air intercoolers. Air-to-air intercoolers are 1/2 as efficient as water-to-air. One intercooler for the supercharger running with a stock pulley and one intercooler for the twins. Forgot to mention that she runs on E-85 which is plentiful in my area. She never gets warm.
Last edited by tdishon; Oct 4, 2014 at 01:44 PM.
I'll have pics in another week. He jigs up the turbo's in the engine bay and then starts the hot side plumbing.
Kind of like the old Detroit Diesel two strokes: turbo before supercharger and then after cooler










