HP Guesses? - Page 2 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

eLeSthree · 05-04-2021, 04:16 PM

Quote:

Originally Posted by larry_g

I was, until we noticed the belt was melting. The next run we were able to see smoke coming off of it.

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Damn, cant go bigger lower?

larry_g · 05-04-2021, 04:25 PM

Quote:

Originally Posted by eLeSthree

Damn, cant go bigger lower?

Even though it's an LSA block, the belt drive is LS3 for the whipple and I don't want to buy another ATI damper. Much cheaper to buy a different upper pulley and belt. I only dropped 0.25" from 4.00 to 3.75 and the tensioner was still in the proper operating range, it just didn't hold. Pretty sure shoehorning a shorter belt on there will do the trick.

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Batmanntexas · 05-04-2021, 08:35 PM

Any idea what your boost pressure was? I was getting serious slip at 12+psi on a 6-rib Grip-Tec pulley, (the belt smoked more than the tires.....for about 3 seconds! SNAP!!!).

larry_g · 05-04-2021, 08:52 PM

Quote:

Originally Posted by Batmanntexas

Any idea what your boost pressure was? I was getting serious slip at 12+psi on a 6-rib Grip-Tec pulley, (the belt smoked more than the tires.....for about 3 seconds! SNAP!!!).

I believe it was peaking just over 10 pounds and then fading back to about 9 over 5000 rpm.

I'm going to pick up the next two smaller sized belts tomorrow and see if I can get the shorter one on first.

Axe55 · 05-05-2021, 07:06 AM

Cool, thanks for posting the boost. I'm sitting at about 8.5psi with the 3.875" pulley, same headers and 2.5" exhaust tuned on 91. I was actually expecting to see less than 10psi with the 3.75" pulley and 3" exhaust... so it's good to know what you got, thanks!

If you think about it, it's actually a good thing you had the belt go now, and not when you're out on the road. Now you can get it set up right in the shop, and enjoy!

larry_g · 05-05-2021, 08:22 AM

Quote:

Originally Posted by Axe55

Cool, thanks for posting the boost. I'm sitting at about 8.5psi with the 3.875" pulley, same headers and 2.5" exhaust tuned on 91. I was actually expecting to see less than 10psi with the 3.75" pulley and 3" exhaust... so it's good to know what you got, thanks!

If you think about it, it's actually a good thing you had the belt go now, and not when you're out on the road. Now you can get it set up right in the shop, and enjoy!

I was at 8 psi on the 4.00" pulley and picked up roughly two more going to the 3.75"

Greenhornet2 · 05-05-2021, 09:21 AM

Hmm i'm getting peak of 11psi.

larry_g · 05-05-2021, 10:41 AM

Quote:

Originally Posted by Greenhornet2

Hmm i'm getting peak of 11psi.

We'll see what I end up with after I have a belt that isn't slipping but keep in mind that I have ported heads that will reduce boost for the same size pulley.

JANNETTYRACING · 05-05-2021, 11:04 AM

Quote:

Originally Posted by larry_g

Just got back home. We were fighting some issues with heat soak and the belt was slipping so it only put down 730/630.

However, looking at it versus one of last year's runs, it should be nudging 800 once I sort out a smaller belt.

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Why so lean?

The whipple LS3 belt drive can do 14 psi on 6 rib belt if set up right.

Ted.

BiggFoot · 05-05-2021, 03:47 PM

If you were at 683 on 93 octane and 8 lbs of boost, I would think the switch to E85 would get you ~ 80 hp and then an additional 15 hp for every 1 lb of boost increase.

So if you are able to squeeze 12 lbs of boost that will add ~ 60 hp plus the ~ 80 hp for the switch to E85 so I am thinking you should be about 823 hp.

Batmanntexas · 05-06-2021, 07:22 AM

Quote:

Originally Posted by JANNETTYRACING

Why so lean?

The whipple LS3 belt drive can do 14 psi on 6 rib belt if set up right.

Ted.

Ted, Can you elaborate on the LS3 setup?

larry_g · 05-06-2021, 07:37 AM

Turns out I was way off on the belt adjustment. I was able to get a belt 3/4" shorter on there and getting more tensioner pressure. I may try to see if I can get another step smaller.

JANNETTYRACING · 05-06-2021, 08:40 AM

Quote:

Originally Posted by Batmanntexas

Ted, Can you elaborate on the LS3 setup?

The way it comes from Whipple.

Then it is just about choosing the shortest belt you can get on it with the sliding Idler loose.

Then push it as close to the T-stat as possible winding the tensioner.

Ted.

larry_g · 11-24-2021, 03:52 PM

Quick update, I went back with a tight belt and put down 756 whp which was still a bit less than I was expecting. I felt that it might be the ported stock throttle body holding me back and I was right. Put on a NW 103mm and it put down 796 whp today.

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05-04-2021, 08:35 PM	#17
Batmanntexas Drives: 2012 Camaro SS (2SS) Join Date: Aug 2012 Location: Stafford, VA Posts: 1,372 View My Garage	Any idea what your boost pressure was? I was getting serious slip at 12+psi on a 6-rib Grip-Tec pulley, (the belt smoked more than the tires.....for about 3 seconds! SNAP!!!). __________________ 745RWHP/634RWTQ on 93 @ 10psi 806/676 on E85 @ 10psi COTW 9/8/14

05-05-2021, 07:06 AM	#19
Axe55 Drives: 2012 Camaro SS Join Date: Jun 2019 Location: Toronto Posts: 159	Cool, thanks for posting the boost. I'm sitting at about 8.5psi with the 3.875" pulley, same headers and 2.5" exhaust tuned on 91. I was actually expecting to see less than 10psi with the 3.75" pulley and 3" exhaust... so it's good to know what you got, thanks! If you think about it, it's actually a good thing you had the belt go now, and not when you're out on the road. Now you can get it set up right in the shop, and enjoy! __________________ 2012 Camaro SS LS3, JRE Scoop, CAI intake, Whipple Supercharger, Fast 85lb injectors, ZL1 pump, McLeod RXT clutch, MGW shifter, Stainless Power 1 7/8 headers w/HFC, Ridetech coilovers, BMR sway bars, trailing arms, toe rods, cradle bushing inserts, 2020 Speed Tuned.

05-05-2021, 09:21 AM	#21
Greenhornet2 Drives: 2011 Camaro 2SS LS3 Whipple Join Date: May 2019 Location: Connecticut Posts: 1,925	Hmm i'm getting peak of 11psi. __________________ Whipple 2.9 CAI ID1050x injectors ZL1 Pump JRE FPCM JMS Voltage booster JRE Rough Idle blower cam BTR .660 springs CHE trunnion kit 1 7/8 Speed Engineering Borla Atak JRE scoop 1.5" lowering springs BMR trailing arms and toe links Cradle inserts 704WHP 603WTQ 93 octane

05-05-2021, 03:47 PM	#24
BiggFoot Drives: 2010 Camaro (M6) 1000+ HP SBE Join Date: Jun 2011 Location: Houston Posts: 1,391	If you were at 683 on 93 octane and 8 lbs of boost, I would think the switch to E85 would get you ~ 80 hp and then an additional 15 hp for every 1 lb of boost increase. So if you are able to squeeze 12 lbs of boost that will add ~ 60 hp plus the ~ 80 hp for the switch to E85 so I am thinking you should be about 823 hp. __________________ F-1X, Cog Drive, ATI Super Pulley/Sprag ~ 19 psi Blower Cam Brodix BP BR 3 Heads Kooks LT Headers and full 3" exhaust Fore Triple Pump Fuel System with ID 1700X Injectors - E85 conversion DSS 9” Conversion (1400 hp axles, driveshaft, pumpkin) & Strange 3.70 gears McLeod RXT Twin HD Clutch & Upgraded Slave RPM Level VII TR6060 BMR Drag Suspension Package w/Strange shocks Carlyle 15" and M/T ET Street R radials 10.1 @ 143 mph 1/4 mile

05-06-2021, 07:37 AM	#26
larry_g Drives: 2014 1SS/1LE Join Date: Nov 2015 Location: Louisville, KY Posts: 826	Turns out I was way off on the belt adjustment. I was able to get a belt 3/4" shorter on there and getting more tensioner pressure. I may try to see if I can get another step smaller. __________________ 830 WHP 700 WTQ, Whipple 2.9 @ 13lbs Boost, Flex Fuel Tune by Blevins Tuning, LSA SBE, 3.5 GripTec, ATI LS3 Damper, AFR 260cc Mongoose, ARP Studs, Yella Terra Ultralites, Johnson 2110R, BTR PDS Stage 3, Melling 10355, Improved Racing Baffle, ID1050X, DSX Triple Fuel Pump, RotoFab CAI, NW 103mm TB, Stainless Works 1-7/8" LTH to 3" Speed Eng w/ X-pipe to NPP, Powermaster 9509 XS, Detroit Speed Motor Mounts, MGW, Monster LT1-S, ZL1 Calipers, DBA Rotors & Pads, Bilstein B6 Struts & Shocks, BMR 1.25" Drop Springs & Adj Rear Bar, Pegasus Solid Bushings, Z/28 Wheels, other misc parts.

11-24-2021, 03:52 PM	#28
larry_g Drives: 2014 1SS/1LE Join Date: Nov 2015 Location: Louisville, KY Posts: 826	Quick update, I went back with a tight belt and put down 756 whp which was still a bit less than I was expecting. I felt that it might be the ported stock throttle body holding me back and I was right. Put on a NW 103mm and it put down 796 whp today. Sent from my Pixel 5 using Tapatalk __________________ 830 WHP 700 WTQ, Whipple 2.9 @ 13lbs Boost, Flex Fuel Tune by Blevins Tuning, LSA SBE, 3.5 GripTec, ATI LS3 Damper, AFR 260cc Mongoose, ARP Studs, Yella Terra Ultralites, Johnson 2110R, BTR PDS Stage 3, Melling 10355, Improved Racing Baffle, ID1050X, DSX Triple Fuel Pump, RotoFab CAI, NW 103mm TB, Stainless Works 1-7/8" LTH to 3" Speed Eng w/ X-pipe to NPP, Powermaster 9509 XS, Detroit Speed Motor Mounts, MGW, Monster LT1-S, ZL1 Calipers, DBA Rotors & Pads, Bilstein B6 Struts & Shocks, BMR 1.25" Drop Springs & Adj Rear Bar, Pegasus Solid Bushings, Z/28 Wheels, other misc parts.