Overdrive calculation? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

OutlawPerformanceGarage · 07-29-2020, 10:50 AM

I’m trying to figure out how much overdrive I will be putting on my supercharger ported by Kong’s Performance Greg. I am running a 9.45 lower and a 2.35 upper pulley. Going in for a new Dino this Friday and I was just wondering how much overdrive I’m producing. Any info is much appreciated https://www.camaro5.com/forums/attac...1&d=1596036362

JB'sZL1 · 07-29-2020, 10:54 AM

That appears to be approaching 26k...might want to back off a little.

https://www.lingenfelter.com/PDFdown...lt%20Sizes.pdf

OutlawPerformanceGarage · 07-29-2020, 12:15 PM

So in total with the upper pulley and lower pulley what do you think the overdrive percentages is? Somebody told me it’s like 50% overdrive combined upper and lower. Do you think this is true?

gtstorey · 07-29-2020, 02:25 PM

You will have a pulley ration of 9.45/2.35=4.02

Stock Pulley ratio from Linenfelter Chart 7.8/3.0=2.6

(4.02-2.6)/2.6=55%

RobZL1 · 07-29-2020, 05:17 PM

Bingo! Most people run about 38% to 42% maximum. Some push it to 44%, but not many people (ZL1 or CTS-V) go up to 55%!

Vegas Bound · 07-29-2020, 05:37 PM

I've been running 44% for over 7 years.

OutlawPerformanceGarage · 07-30-2020, 11:19 PM

Damn so what do you think? Do you think I’m in bad shape here.? I seen one other dude doing on the stock bottom man on YouTube and he made 830 to the wheel with stock heads stock bottom end. Do you think I should stop tuning at 5500 RPM?

OutlawPerformanceGarage · 07-30-2020, 11:21 PM

Thank you man I appreciate that. 55% is a lot. I’m going to hit the Dino this Friday right now we’re at 7:40 to the rear wheel and the only thing that I’ve changed was ATI super damper the 9.45 lower pulley and a custom 5 inch intake with 3 inch exhaust all the way back. Do you think this is a bit much for the car to handle?

Vegas Bound · 07-30-2020, 11:22 PM

Quote:

Originally Posted by OutlawPerformanceGarage

Damn so what do you think? Do you think I’m in bad shape here.? I seen one other dude doing on the stock bottom man on YouTube and he made 830 to the wheel with stock heads stock bottom end. Do you think I should stop tuning at 5500 RPM?

Hell no, I'm pushing to 7200 rpm. However, I would step down to a 2.55 upper.

JB'sZL1 · 07-31-2020, 08:41 AM

I've stated my opinion. You'll always find some saying they've pushed it to 18lbs. or 26.5k. The safe zone is 15, no more than 16 lbs. and 23k. Period.

leemozoid · 08-22-2020, 07:45 PM

I'm running 38% but that's still only 13 psi boost. All else being equal in a good build that's hardly an engine killer.

Batmanntexas · 08-22-2020, 09:19 PM

Quote:

Originally Posted by leemozoid

I'm running 38% but that's still only 13 psi boost. All else being equal in a good build that's hardly an engine killer.

I may be misinterpreting your comment, but I don't think it's about boost pressure killing the engine. I think it's more about critical speed of the bearings and rotor assemblies killing the blower...and maybe killing the engine.

07-29-2020, 10:50 AM	#1
OutlawPerformanceGarage Drives: ZL1 Camaro, Procharged Silverado, Join Date: Mar 2020 Location: Vacaville Posts: 21 View My Garage	Overdrive calculation? I’m trying to figure out how much overdrive I will be putting on my supercharger ported by Kong’s Performance Greg. I am running a 9.45 lower and a 2.35 upper pulley. Going in for a new Dino this Friday and I was just wondering how much overdrive I’m producing. Any info is much appreciated https://www.camaro5.com/forums/attac...1&d=1596036362 Attached Images

07-29-2020, 05:17 PM	#5
RobZL1 fo'shizZL1 Drives: 2017 ZL1 Join Date: Aug 2017 Location: ATL Posts: 1,281	Bingo! Most people run about 38% to 42% maximum. Some push it to 44%, but not many people (ZL1 or CTS-V) go up to 55%! __________________ 2017 ZL1 M6 Black \| Maggie 2650 // 103TB // Big Gulp Past Rides- 2014 ZL1 M6 Red Hot \| Tons of mods 2004 CTS-V M6 Silver \| Many mods 1995 Corvette M6 Torch Red \| A few more mods 1992 Camaro M5 White \| A few mods

08-22-2020, 07:45 PM	#11
leemozoid Drives: '15 Silverado LTZ & '13 ZL1 ragtop Join Date: Nov 2016 Location: Edmond, Oklahoma Posts: 313 View My Garage	I'm running 38% but that's still only 13 psi boost. All else being equal in a good build that's hardly an engine killer. __________________ HP tune, Kooks 1 7/8" LT w/ cat deletes, FIC 1300 inj, E85, GPI SS3 blower cam, Fore Innovations Gen 5 dual pump module with twin TI Automotive 430 lph E85 compatible pumps, Lingenfelter 10 bolt 2.55" upper/9.17" lower pulleys, AFCO triple pass intercooler with dual fans, Killer Chiller interchiller, B3R insulated expansion tank, full BMR rear drag cradle and suspension, DSS one piece driveshaft and Stage 5 billet axle shafts, Rotofab CAI, reinforced brick, Devil's Own progressive methanol injection, FTI 9.5" billet lock up Street Racer torque converter, 3200 rpm stall, triple clutch.

07-29-2020, 10:54 AM	#2
JB'sZL1 Drives: 2013 ZL1 and 2019 Ram Laramie Join Date: May 2017 Location: Milwaukee Posts: 1,259	That appears to be approaching 26k...might want to back off a little. https://www.lingenfelter.com/PDFdown...lt%20Sizes.pdf

07-29-2020, 12:15 PM	#3
OutlawPerformanceGarage Drives: ZL1 Camaro, Procharged Silverado, Join Date: Mar 2020 Location: Vacaville Posts: 21 View My Garage	So in total with the upper pulley and lower pulley what do you think the overdrive percentages is? Somebody told me it’s like 50% overdrive combined upper and lower. Do you think this is true?

07-29-2020, 02:25 PM	#4
gtstorey Drives: 2010 Camaro SS2,L99, LSA SC Join Date: Aug 2017 Location: Huntsville, AL Posts: 2,155	You will have a pulley ration of 9.45/2.35=4.02 Stock Pulley ratio from Linenfelter Chart 7.8/3.0=2.6 (4.02-2.6)/2.6=55%

07-29-2020, 05:37 PM	#6
Vegas Bound Account Suspended Drives: 2013 Sparkly Red One Join Date: Dec 2018 Location: Hospitality State Posts: 2,558	I've been running 44% for over 7 years.

07-30-2020, 11:19 PM	#7
OutlawPerformanceGarage Drives: ZL1 Camaro, Procharged Silverado, Join Date: Mar 2020 Location: Vacaville Posts: 21 View My Garage	Damn so what do you think? Do you think I’m in bad shape here.? I seen one other dude doing on the stock bottom man on YouTube and he made 830 to the wheel with stock heads stock bottom end. Do you think I should stop tuning at 5500 RPM?

07-30-2020, 11:21 PM	#8
OutlawPerformanceGarage Drives: ZL1 Camaro, Procharged Silverado, Join Date: Mar 2020 Location: Vacaville Posts: 21 View My Garage	Thank you man I appreciate that. 55% is a lot. I’m going to hit the Dino this Friday right now we’re at 7:40 to the rear wheel and the only thing that I’ve changed was ATI super damper the 9.45 lower pulley and a custom 5 inch intake with 3 inch exhaust all the way back. Do you think this is a bit much for the car to handle?

07-31-2020, 08:41 AM	#10
JB'sZL1 Drives: 2013 ZL1 and 2019 Ram Laramie Join Date: May 2017 Location: Milwaukee Posts: 1,259	I've stated my opinion. You'll always find some saying they've pushed it to 18lbs. or 26.5k. The safe zone is 15, no more than 16 lbs. and 23k. Period.