'08 Diesel- SRT Conversion Plan - Jeep Garage - Jeep Forum

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Old 06-25-2016, 11:00 AM
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'08 Diesel- SRT Conversion Plan

Great site, so much info and advice.

Plan to convert '08 GC CRD Limited to SRT8 look.

Suspension- Lowered with Eibach SRT8 springs, Bilstein SRT8 shocks, SRT8 or ADDCO sway bars, BWoody sway bar links and tubular rear arms and track bar.

Wheels- SRT8 Reps, 20x9-35offset and 20x10-50offset
Tires- 275/40 and 315/35 Continental Extreme DWS 28.7" diameter both

Body- SRT8 front and rear bumper conversion, SRT8 Side Skirts, SRT8 roof rails

Exhaust- SRT8 2 tips out the center, eliminate the DPF and straight pipe back to tips

Performance- swirl motor delete, 3" turbo downpipe and DPF delete with straight pipe to 2 center tips, turbo resonator delete, 3" intercooler, CAI and intake piping mod, Chip, Meth/washer fluid injection.

Brakes- Might upgrade the fronts to 14" SRT8 rotors and 4 piston Brembo calipers as they are a direct bolt-on if they fit within the Rep wheels. I have a set of these calipers that I bought for a different project.

Any other ideas or recommendations?
ADDCO vs. SRT sway bars?
Rim and tire size? Fit? Rub?
Is there a difference between the SRT8 side skirts and the GC Limited skirts, they look similar?
Looks like most don't change the bumpers. Too expensive?

Is Custom Spooling Tuning out of business? website? Or is Green Diesel Eng the only tuning available?

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Old 06-26-2016, 04:57 AM
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Re: '08 Diesel- SRT Conversion Plan

Also Dorman 974-001 TPMS for the new rims.

Maybe not the Brembo caliper upgrade. It looks like the early WK1 SRT 8 Brembo calipers have a bolt mounting spacing of 4.5" and the WK1 nonSRT is 6.5".
Lucky WK2 guys the SRT8 and nonSRT caliper bolt spacing is the same 5.5".

Probably the SRT8 sway bars over the ADDCO for perfect fit and cheaper.

Maybe not the SRT8 front bumper. I live in the NE and snows here and will be highway driving 200 miles to work and don't need a 'snowplow' front spoiler/lip. Rear bumper is OK and I want the center exhaust look.

Found the SRT8 Bilstein shocks for $750 shipped.
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Old 06-26-2016, 10:47 AM
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Originally Posted by CobraMarty View Post
Also Dorman 974-001 TPMS for the new rims.

Maybe not the Brembo caliper upgrade. It looks like the early WK1 SRT 8 Brembo calipers have a bolt mounting spacing of 4.5" and the WK1 nonSRT is 6.5".
Lucky WK2 guys the SRT8 and nonSRT caliper bolt spacing is the same 5.5".

Probably the SRT8 sway bars over the ADDCO for perfect fit and cheaper.

Maybe not the SRT8 front bumper. I live in the NE and snows here and will be highway driving 200 miles to work and don't need a 'snowplow' front spoiler/lip. Rear bumper is OK and I want the center exhaust look.

Found the SRT8 Bilstein shocks for $750 shipped.
You can do the brembo brake upgrade. He just needs to get the front srt spindles as well and the backing plate for the rear brakes
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Old 06-26-2016, 05:35 PM
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Re: '08 Diesel- SRT Conversion Plan

Yeah the '08 WK1 SRT8 knuckles are like $400-600 each side if you can find them and you can only use the 4 piston Brembos up front.

For that much coin, I would rather make an adapter bracket and use the 6 piston WK2 SRT8 Brembos on the stock WK1 nonSRT knuckles instead.

Or use the 14" SRT8 rotors and make a bracket to move the stock 2 piston caliper outward to fit.

Any of this is relatively easy. I've done this before with the Jeep XJ.
See HERE. And HERE.
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Old 06-26-2016, 05:46 PM
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Originally Posted by CobraMarty View Post
Yeah the '08 WK1 SRT8 knuckles are like $400-600 each side if you can find them and you can only use the 4 piston Brembos up front.

For that much coin, I would rather make an adapter bracket and use the 6 piston WK2 SRT8 Brembos on the stock WK1 nonSRT knuckles instead.
Cbengineering makes a bracket system to mount big 6 pot Wilwoods on it. They aren't cheap tho and you can run the factory srt rotors. They come with the bracket, calipers, and lines. But it runs like 1200 just on the front and same on the rear
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Old 06-27-2016, 12:34 AM
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Re: '08 Diesel- SRT Conversion Plan

Actually $1500 + the cost of the SRT8 rotors. Ouch. Best thing is that they will fit on the nonSRT8 knuckles.

Could do a kit to use SRT8 14" rotors and adapter bracket to relocate the stock 2 piston calipers.
Also could do a kit to use the SRT8 14" rotors and adapter bracket to locate the 4 piston or 6 piston Brembo calipers.

Either would be priced much less than $1600+ for the Wilwood kit.

Heck while at it could just use the '14 SRT8 380mm (15") rotor and the Brembo calipers and all bolt to the WK1nonSRT knuckle.


Centric 12058003 '08 SRT8 360mm 14.12" 53.0mm height 32.0mm thickness
Centric 12058010 '14 SRT8 380mm 14.96" 54.6mm height 34.0mm thickness

I might have to buy a WK1 knuckle and unit bearing and some rotors to mock it all up. Ebay has complete knuckles for under $100.
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Old 06-29-2016, 12:45 PM
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Re: '08 Diesel- SRT Conversion Plan

Got a WK1 knuckle and unit bearing off Ebay for $60 free shipping.
I already have the Brembo WK1 4 piston and WK2 6 piston front calipers.
Now to order some rotors and a stock caliper and pads and start mocking this BBK up.

Centric 12058001 '08 WK1 nonSRT 327mm 12.87" 53.0mm height 30.0mm thickness
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Old 06-29-2016, 02:16 PM
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Quote:
Originally Posted by CobraMarty View Post
Got a WK1 knuckle and unit bearing off Ebay for $60 free shipping.
I already have the Brembo WK1 4 piston and WK2 6 piston front calipers.
Now to order some rotors and a stock caliper and pads and start mocking this BBK up.

Centric 12058001 '08 WK1 nonSRT 327mm 12.87" 53.0mm height 30.0mm thickness
You'll need to do some machine work to the spindle for the wk2 fronts to bolt up. The bolt spacing is diffrent from the wk1 srt and wk2 srt. My buddy greenwayer (his user name here) Did a wk2 brembo swap and he had to machine the spindles
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Old 06-29-2016, 03:57 PM
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Re: '08 Diesel- SRT Conversion Plan

Yep the different years have different mounting spacing.

WK1 SRT8 4 piston Brembo calipers have a bolt mounting spacing of 4.5"
WK1 nonSRT is 6.5".
WK2 SRT8 6 piston Brembo and nonSRT caliper bolt spacing is the same 5.5".

Adapter brackets will be required. All bolt on and no machining of the knuckle required, hopefully.
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Old 07-02-2016, 07:12 PM
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Re: '08 Diesel- SRT Conversion Plan

Got the WK1 nonSRT knuckle today from Ebay. Measured it and the caliper mounting lugs are 5.16" hole center line apart. I thought that I read somewhere here that they were 6.5". I hope I got the right knuckle.

I'm going to order a caliper for the same '08 WK1 nonSRT and measure it. Or maybe go to Autozone and measure it there.

If it is really 5.16", that is OK it just makes making the adapter bracket more involved. Still no biggie.

I guess the big question is- How many WK1 nonSRT are running 20" rims and would they be interested in a 15" rotor conversion while retaining and using the stock caliper? The rotor would change from 12.87" diameter to 14.96", +2.09" increase. These bigger rotors would have better braking and fill in the wheel much better with the bigger rotor. No big wheel/small brake rotor look.
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Old 07-02-2016, 09:32 PM
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Quote:
Originally Posted by CobraMarty View Post
Got the WK1 nonSRT knuckle today from Ebay. Measured it and the caliper mounting lugs are 5.16" hole center line apart. I thought that I read somewhere here that they were 6.5". I hope I got the right knuckle.

I'm going to order a caliper for the same '08 WK1 nonSRT and measure it. Or maybe go to Autozone and measure it there.

If it is really 5.16", that is OK it just makes making the adapter bracket more involved. Still no biggie.

I guess the big question is- How many WK1 nonSRT are running 20" rims and would they be interested in a 15" rotor conversion while retaining and using the stock caliper? The rotor would change from 12.87" diameter to 14.96", +2.09" increase. These bigger rotors would have better braking and fill in the wheel much better with the bigger rotor. No big wheel/small brake rotor look.
You need the srt knuckle to mount srt brembos
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Old 07-02-2016, 11:39 PM
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Re: '08 Diesel- SRT Conversion Plan

Actually you don't need to use the SRT knuckle. That is the whole point of what I am doing here. Similar to CB Engineering with the WK1nonSRT knuckle bolt on adapters to allow the use of bigger rotors and Wilwood calipers, I can use an adapter brackets which will bolt on to the WK1nonSRT knuckle and be able to use bigger diameter rotors and any or different calipers will be able to be bolted on. I will be able to use the stock WK1nonSRT calipers, WK1 SRT calipers, WK2nonSRT calipers or even WK2 SRT calipers or even some other caliper from another manufacture like Explorer 2 piston calipers.

WK1 SRT8 knuckles are made of 'unobtainium and expensivainium'. I do not and don't want to use them and don't have to use them. I can make a bolt on to the WK1nonSRT knuckle big brake setup for less than the cost of a set of used WK1 SRT knuckles. That is the point here.
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