Underdrive Pulley?

Gen5&Beyond · 04-05-2018, 11:59 PM

Anyone using a underdrive pulley?

ULTRAZLS1 · 04-06-2018, 12:09 AM

There’s a few

What you want to know?

JCunningham · 04-06-2018, 02:27 AM

are you cammed? because there is no need for one unless your RPM is over 800. they dont free up power. They are meant to slow your steering pump and alt down with the higher rpm.

KingLT1 · 04-06-2018, 07:11 AM

62nalide said they seen over 10whp with ATI balancer.

ZNix · 04-06-2018, 07:40 AM

10whp for 450 is actually not bad at all... Adding to my list.

ULTRAZLS1 · 04-06-2018, 08:11 AM

I got one now. We’ll see if I gain anything at the track

It’s 3 lbs lighter than the stock and is 10% underdrive. There’s no power steering pump or pulley on these cars btw. Electric power steering.
While they do claim to stabilize better at high rpm that’s not the only benefit. The slightly smaller pulley makes everything easier to turn. Being lighter is less for the crank to spin as well. It should free up some hp

Just don’t use the arp bolt
http://www.camaro6.com/forums/showthread.php?t=524649

Snowblind · 04-06-2018, 08:40 AM

ZNix · 04-06-2018, 02:28 PM

Has anyone checked out the Innovators West unit? Looks to be even lighter.

Gen5&Beyond · 04-07-2018, 09:43 PM

Quote:

Originally Posted by ULTRAZLS1

There’s a few

What you want to know?

Just wondering what kind of gains everyone was seeing. Is it worth the cost?

Gen5&Beyond · 04-07-2018, 09:50 PM

Quote:

Originally Posted by ULTRAZLS1

I got one now. We’ll see if I gain anything at the track

It’s 3 lbs lighter than the stock and is 10% underdrive. There’s no power steering pump or pulley on these cars btw. Electric power steering.
While they do claim to stabilize better at high rpm that’s not the only benefit. The slightly smaller pulley makes everything easier to turn. Being lighter is less for the crank to spin as well. It should free up some hp

Just don’t use the arp bolt
http://www.camaro6.com/forums/showthread.php?t=524649

Great! Let us know what you think.

TJay74 · 04-07-2018, 10:15 PM

Sometimes the cost versus the gains are not the greatest, but in the end its the sum of all those small gains that starts to make it worth while if you are chasing for good bolt on horsepower.

ULTRAZLS1 · 04-07-2018, 10:41 PM

Quote:

Originally Posted by Gen5&Beyond

Great! Let us know what you think.

Well a couple people that have dyno them claim they are worth over 10 rwhp. That’s hard for me to believe. I would guess like 7-8. But hey maybe it true idk

I have messed with the tuning and conditions won’t be the exact same to compare from before. The car doesn’t feel slower is all I know lol

Hope I can make it out next weekend. Check the drag section

Quote:

Originally Posted by TJay74

Sometimes the cost versus the gains are not the greatest, but in the end its the sum of all those small gains that starts to make it worth while if you are chasing for good bolt on horsepower.

100% correct. I got a lot of little things on my car most would say not worth it. But in the end they not as fast as me lol

KingLT1 · 04-08-2018, 07:46 AM

Quote:

Originally Posted by TJay74

Sometimes the cost versus the gains are not the greatest, but in the end its the sum of all those small gains that starts to make it worth while if you are chasing for good bolt on horsepower.

Yep...it's always those last few horsepower that have the worst cost vs hp ratio.

Booher · 11-06-2018, 10:21 AM

How is the long term of this? My old car, an frs, if you did a lightweight crank pulley or other pulleys, it added extra wear on the crank bearings as there wasnt enough weight to counter balance it. That is on a boxer motor which has less harmonic vibrations (is that the right term) than a standard v engine setup. They actually use a heavier aftermarket crank pulley. Could this happen with our engines as well, or since the engines are different it's hard to compare?

04-05-2018, 11:59 PM	#1
Gen5&Beyond Drives: 2016 2ss Camaro Join Date: Oct 2013 Location: Alabama Posts: 119	Underdrive Pulley? Anyone using a underdrive pulley? __________________ HBM 2016 2SS A8 NPP 427 Pray Head/Cam/Converter, Pray Ported Highram, 103mm TB, Pray Tuned, 3030 Drag Pack, Roark OTR CAI, TSP Headers, E85, UDP Best times 1/4 n/a 9.23@146.96, 1/8 5.91@118

04-06-2018, 02:27 AM	#3
JCunningham Drives: 2017 2SS M6 Join Date: Jun 2013 Location: WNY Posts: 7,070	are you cammed? because there is no need for one unless your RPM is over 800. they dont free up power. They are meant to slow your steering pump and alt down with the higher rpm. __________________ real ZL1 wheels and brakes, 285/305 Michelin Pilot Super Sports, Pray ported Intake manifold, Soler Throttle Body, Rotofab intake, EFI Tuning Flex fuel kit, full American Racing Headers Exhaust, 1 7/8" w/ cats H pipe and mufflers. Full 1LE suspension, with BMR adjustable sway bars and links, GM aluminum cradle bushings, Hurst shifter with lighter reverse spring, TWM shifter knob, Tick level 1 transmission. I should have bought a ZL1

04-06-2018, 07:11 AM	#4
KingLT1 Drives: 2016 1SS NFG A8 Join Date: Aug 2017 Location: 46804 Posts: 6,797	62nalide said they seen over 10whp with ATI balancer. __________________ 2016 NFG 1SS A8 Options-2SS Leather/NPP Perf. mods-Whipple 2.9/Fuel System/Flex Fuel/103mm TB/Rotofab Big Gulp/Cat Deletes/Corsa NPP Per. times- 10.5 @ 137 w/ 1.8 60ft Full weight on 20's 1200DA

04-06-2018, 08:40 AM	#7
Snowblind Drives: '16 2SS / '05 SRT10 Ram / '65 bu Join Date: Dec 2015 Location: Philthy Posts: 978	__________________ H/C SBE 9.80@140 powered by Texas Speed

11-06-2018, 10:21 AM	#14
Booher Drives: 2019 zl1 6 speed Join Date: Jul 2017 Location: Lake Havasu Arizona Posts: 979	How is the long term of this? My old car, an frs, if you did a lightweight crank pulley or other pulleys, it added extra wear on the crank bearings as there wasnt enough weight to counter balance it. That is on a boxer motor which has less harmonic vibrations (is that the right term) than a standard v engine setup. They actually use a heavier aftermarket crank pulley. Could this happen with our engines as well, or since the engines are different it's hard to compare? Last edited by Booher; 11-06-2018 at 10:54 AM.

04-06-2018, 12:09 AM	#2
ULTRAZLS1 Drives: 14 Silverado LTZ Z71, 16 Camaro SS Join Date: Nov 2009 Location: Jackson, Michigan Posts: 4,407	There’s a few What you want to know?

04-06-2018, 07:40 AM	#5
ZNix Drives: 1987 Buick Grand National Join Date: Mar 2016 Location: Mass Posts: 149	10whp for 450 is actually not bad at all... Adding to my list.

04-06-2018, 08:11 AM	#6
ULTRAZLS1 Drives: 14 Silverado LTZ Z71, 16 Camaro SS Join Date: Nov 2009 Location: Jackson, Michigan Posts: 4,407	I got one now. We’ll see if I gain anything at the track It’s 3 lbs lighter than the stock and is 10% underdrive. There’s no power steering pump or pulley on these cars btw. Electric power steering. While they do claim to stabilize better at high rpm that’s not the only benefit. The slightly smaller pulley makes everything easier to turn. Being lighter is less for the crank to spin as well. It should free up some hp Just don’t use the arp bolt http://www.camaro6.com/forums/showthread.php?t=524649

04-06-2018, 02:28 PM	#8
ZNix Drives: 1987 Buick Grand National Join Date: Mar 2016 Location: Mass Posts: 149	Has anyone checked out the Innovators West unit? Looks to be even lighter.

04-07-2018, 10:15 PM	#11
TJay74 Drives: 17 Camaro SS 1LE & 16 Sierra AT CC Join Date: Nov 2016 Location: Norman, OK Posts: 2,424	Sometimes the cost versus the gains are not the greatest, but in the end its the sum of all those small gains that starts to make it worth while if you are chasing for good bolt on horsepower.

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