Turbo 400 LT1 Gear Ratio for 1/8 or 1/4 Mile or Compromise for Both - LS1TECH

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Turbo 400 LT1 Gear Ratio for 1/8 or 1/4 Mile or Compromise for Both

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Old 02-12-2012, 03:36 PM   #1
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Default Turbo 400 LT1 Gear Ratio for 1/8 or 1/4 Mile or Compromise for Both

Which gear ratio would you choose for either an 1/8 or 1/4 Mile set up? If you had to choose a compromise to run at both distances which ratio would you choose?

Joe
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Old 02-13-2012, 08:41 AM   #2
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How much power does it make? What tire? Weight?
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Old 02-13-2012, 09:16 AM   #3
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About 350HP for now. The car is pretty much stock weight for now. It will eventually get to 500-550HP and go on a diet.

Joe
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Old 02-17-2012, 12:12 AM   #4
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I run a 4.71 for the 1/8, it was originally for N/A 1/4 mile stuff with the 6 speed. Now it works for nitrous 1/8 mile runs. Might still be able to squeek out the 1/4, spinning the motor 600 rpm higher now.
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Old 02-17-2012, 12:48 AM   #5
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Mine has a TH-400 with 4.30's and a 28" tire. But it all depends on how fast you're going to run and what RPM's you can pull. I try to keep mine under 6,500 and my engine is stock with a cam and headers. It only runs 112 MPH.

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Old 02-17-2012, 01:13 AM   #6
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Quote:
Originally Posted by Big Al View Post
Mine has a TH-400 with 4.30's and a 28" tire. But it all depends on how fast you're going to run and what RPM's you can pull. I try to keep mine under 6,500 and my engine is stock with a cam and headers. It only runs 112 MPH.

Al 95 Z28
What are your times that you run?

My plans are a mess now. They shut down the track down (Irwindale) that I was going to run the car at so I am still up in the air of what to do for a gear now as I am not sure if I will be building an 1/8, 1/4 or combo car now!

Joe
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1993 Trans Am Red, Turbo 400 RMVB Trans Brake, Line Lock, Continental 3800 RPM Stall Converter, 3.23 Gear, TCI SFI Flex Plate, Gear Vendor Overdrive, ARP Bolts, BMR LCA, UMI Torque Arm (Tunnel Mounted), UMI Turbo 400 Crossmember, Founders Performance Bolt On Relocation Kit, Founders Performance Panhard Bar and Relocation Kit, EGR & Air Pump Removed, Long Tube Headers, Heated O2 Conversion with AFS75's, ORY 3" DBRA DynaTech Split Core Muffler with PCMforLess Tune
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Old 02-17-2012, 03:16 AM   #7
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irwindale is shut down?? I moved from Upland about a year ago, born and raised hanging out at irwindale. what's the deal with that? pic in my sig is at irwindale, avatar is at fontucky.

i have a continental converter, a 5600 8" converter that hits super hard and runs really efficient. you'll be pleased with yours!
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Old 02-17-2012, 10:17 AM   #8
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Quote:
Originally Posted by StraightTimeStirrups View Post
What are your times that you run?

My plans are a mess now. They shut down the track down (Irwindale) that I was going to run the car at so I am still up in the air of what to do for a gear now as I am not sure if I will be building an 1/8, 1/4 or combo car now!

Joe
That run was 12.151. But my engine is dead. The tune is far off and the knock sensor is retarding the hell out of the timing. If I had 50 more horsepower I'd run out of gear in the 1/4 mile. My 60's are also way off as I can't hold the car with the brakes. So I need to do some more work, like add a line lock and wire up the trannie brake. It's a work in progress Right now I'm moving the seat back so I can get in and out. It's hell to fight an old body.

Al 95 Z28
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Old 02-17-2012, 10:17 AM
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