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JMB 1200 whp F1X G2 GTS

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JMB 1200 whp F1X G2 GTS
Old September 8th, 2019, 11:21 PM   #1
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JMB 1200 whp F1X G2 GTS

Hey guys,
Just thought Id share my recent G2 GTS built by Justin at JMB Performance. I dropped it off in February as a virgin and picked it up in August fully built with 1200 whp on his Mustang dyno. Very happy with the car after having it just over a week. I picked the car up for just under $33,000 with 27k miles and in MINT condition unscathed. Im $60k into the mods so I now have a CLEAN G2 GTS making 1200 whp for $93k.

Here is a mod list

JMB 1500 hp long block
Callies custom length rods
Billet mains
Clevite bearings
Diamond Pistons
ARP hardware
Gen 4 heads CNC ported/polished
Drilled heads for 1/2 studs
Gen 5 intake port matched
ID 1300 injectors
Fore 450 triple fuel pumps on E85
F1X ProCharger
Custom twin throttle body setup w/IAC for Gen5 IM
Custom JMB stainless 2 headers
Header back Borla exhaust

McLeod clutch
Tranzilla built T56 trans
DSS 9 differential with Strange gears 3:25
Willwood custom 15 conversion brake kit
1500hp DSS axles/drive shaft

Street wheels built by Rennen Forged
Front 19x10 2 piece glossy black drums with matt black faced spokes
Toyo 289/95ZR19 R888R
Rear 19x12.5 2 piece glossy black drums with matt black faced spokes
Toyo 345/30ZR19

Drag pack front RC Component Torx Eclipse Prisim 17x5
Hoosier bias ply 28x5
Drag pack rear RC Component Torx Eclipse Prisim beadlock 15x10 (requires chassis modifications with 1/8 spacers)
Mickey Thompson ET Street RadialPRO 315/60/15

Accessories
AEM wideband w/shift light
AEM boost gauge
N2MB 2 step/No lift shift box
Short shift throw
Custom line lock
Custom catch can with over axle secondary catch can to prevent cabin odors
3 core aluminum radiator

Finale numbers on the Mustang dyno @ 3,500 DA 110 F
1171 whp @ 6156rpm
1020 wtq @ 5624rpm
Tuned on pump E85 that measured out at E70
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Old September 9th, 2019, 12:42 AM   #2
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That's rad. How much boost are you running?
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Old September 9th, 2019, 08:22 AM   #3
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What are you using to tune it? AEM or some other exotic system? I bet running E-85 you get around 3 MPG.....LOL.
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Old September 9th, 2019, 08:29 AM   #4
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20psi on the current pulley
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Old September 9th, 2019, 08:32 AM   #5
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Stock ECU and AFR is on point through out the RPM ranges. It’s runs great! Dead hooks 2nd gear on my street set up when 70 + with a good road surface.
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Old September 9th, 2019, 09:21 AM   #6
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Beautiful car and build! But you might want to remove that Gen 5 intake if you plan on boosting anymore than 13-15 lbs of boost. Put on a ported Gen 4 intake. You will pop that plastic intake.
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Old September 9th, 2019, 09:24 AM   #7
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Good to know the stock PCM can support your set-up. Interesting build as compared to my GTS running a 4.0 Whipple at around 15 PSI boost. I'm running GEN-IV ported heads on obviously a 'one-off' custom blower intake. I'm still in the process of tuning it and haven't gotten my foot into it 100% on the street. Smart enough to know my limits trying to do 'some' street tuning. Its drivable now but not tuned...
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Old September 9th, 2019, 12:14 PM   #8
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Love that FORE fuel pump set-up. I see they are here in the greater Tampa area....cool. So did you use their GEN-V set-up with some modifications...fuel sender and wiring adapter? I need a new fuel pump system and this looks sweet.
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Old September 9th, 2019, 06:27 PM   #9
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Exactly right on the fuel set up
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Old September 9th, 2019, 06:33 PM   #10
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Beautifully done! I hope you have a filter and closeout panel in the works to pull cooler, filtered air into the motor. Something like a Gen 1 snorkle or Vipair housing that can accommodate a big, flat panel filter in front of the radiator core would be great.

Last edited by GTS Dean; September 9th, 2019 at 06:40 PM.
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Old September 9th, 2019, 06:40 PM   #11
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Very sweet build. I've always built my cars myself. It must be nice to just cut a cheque and have it all finished though. One day i'd like to try that lol Have fun with it.
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Old September 9th, 2019, 10:36 PM   #12
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Gorgeous build! If I ever go blower, I really want an F1X to replace my old F1A 03 Cobra.

Why the mix of bias ply front and radial rear tires?


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Old September 10th, 2019, 10:00 AM   #13
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This just happened, how much tension do you have on the crank? I have a project with a Paxton that did the same thing:

https://www.facebook.com/chad.anders...18830656144739
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Old September 25th, 2019, 10:23 PM   #14
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Quote:
Originally Posted by 99RT10&GTS View Post
This just happened, how much tension do you have on the crank? I have a project with a Paxton that did the same thing:

https://www.facebook.com/chad.anders...18830656144739
Just enough not to slip! That happened on a gen 3 crank. Not the same crank so no worries!
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Old September 25th, 2019, 10:25 PM   #15
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Quote:
Originally Posted by WDW MKR View Post
Gorgeous build! If I ever go blower, I really want an F1X to replace my old F1A 03 Cobra.

Why the mix of bias ply front and radial rear tires?


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Depends on the track. Bias ply front and rear for 1/4 mile and radial for for 1/2 mile/road course
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Old September 27th, 2019, 04:50 PM   #16
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I'm impressed you made 1500 hp Hook in 2nd.

I sure it's shocked a few people.
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Old September 28th, 2019, 10:00 PM   #17
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I'm impressed you made 1500 hp Hook in 2nd.

I sure it's shocked a few people.
You and I both! 2nd started to spin after 4500 rpm so I short shifted at that point but after that it was dead hooking. Really pulled hard after 4500 rpm
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Old September 28th, 2019, 11:03 PM   #18
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Ok, I'll be the downer here. But I'm always perplexed at why someone would take a mint car and basically rebuild it. I mean, couldn't a higher mile Viper be found for 10-20K less and the same work be done to it? Then you'd have a CLEAN G2 GTS making 1200 whp for $73k instead of 93k.

That said, JMB is a great asset to the Viper community. Good job.
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Old September 29th, 2019, 09:37 AM   #19
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Ok, I'll be the downer here. But I'm always perplexed at why someone would take a mint car and basically rebuild it. I mean, couldn't a higher mile Viper be found for 10-20K less and the same work be done to it? Then you'd have a CLEAN G2 GTS making 1200 whp for $73k instead of 93k.

That said, JMB is a great asset to the Viper community. Good job.
A gen 2 GTS for 20k less than $33k?
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Old October 1st, 2019, 11:48 AM   #20
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You don’t have issues with the ProCharger trying to snap off the crank snout?
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