Dyno'd my truck the other day - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Injected68LS1 · 12-26-2003, 01:36 AM

I used the chassis dyno at work a few days ago. After a little tuning on the computer I ended up with the following:

301 hp @ 5800 rpm (still made 300hp @ 6300)
313 ftlb @ 4400 rpm

That's with a completely stock LS1. I do have a custom intake pipe, dual exhaust, and a programable ECU.

Not bad through a 700r4 automatic. I was very happy.

The ET estimates for that and my 3500 lb truck(3650 with me) is 13.3 seconds.

stepside454 · 12-26-2003, 01:56 AM

very cool, good job

Smokin72on20s · 12-26-2003, 03:08 AM

i thought an LS1 vette motor made 345hp? is that an f-body motor?

Tmax · 12-26-2003, 03:17 AM

The 345 hp rating for the LS1 vette is at the flywheel, not at the rear wheels. When you factor in the typical 15 to 20 percent drivetrain loss, his 301 hp is probably 350-360 hp at the flywheel, so I would say that his motor is as strong or stronger than a typical vette. The only difference between F bodies and vette LS1's is the exhaust, which he has changed over to something more similar to the vette as I understand it.

Very well done!! I hope my conversion comes out as strong as his. I am using Hooker long tube headers on my LS1 project, so I am hoping to at least equal these numbers.

Injected68LS1 · 12-26-2003, 03:47 AM

That's true Tmax. I'm actually using the factory corvette exhaust manifolds. They're almost layed out like headers. I'm actually changing the exhaust soon so I'll probably pick up at least 10 horse.

Can't wait to see your conversion. Have any pics??

lukecp · 12-26-2003, 11:21 AM

Sweet power numbers! I remember reading in Popular Hot Rodding that the LS1 was under rated....they dyno'd one in a Trans Am and it had like 299 at the rear wheels.

Sounds like a fun little truck

MellowYellow70 · 12-26-2003, 12:30 PM

Quote:

Originally posted by Tmax
Very well done!! I hope my conversion comes out as strong as his. I am using Hooker long tube headers on my LS1 project, so I am hoping to at least equal these numbers.

I've got the 2001 Vette manifolds (basically shorty header) from my '01 Coupe if your interested in doing like Injected68LS1 did. Went to long tubes about a year ago on the vette.

**N2TRUX** · 12-26-2003, 12:47 PM

Injected68LS1 , Did you do a print out? I would really like to see the hp/tq curve.

I have a 99 LS1 in my 82 Blazer with a 4L60E, and 3.73 gears. It has a set of Street & Performance "shorty" headers, and a true dual exhaust, with hi-flow cats. I am curious to see your curve, so I can guess how my combo would perform....

Injected68LS1 · 12-26-2003, 05:27 PM

I have to pull the graph off of the dyno computer. I'll post it soon. I still have some tuning to do. I'm missing some torque down low.

**N2TRUX** · 12-27-2003, 01:51 PM

Thanks, post it when you can....

12-26-2003, 01:36 AM	#1
Injected68LS1 Registered User Join Date: Jul 2003 Location: So. Cal. Posts: 389	Dyno'd my truck the other day I used the chassis dyno at work a few days ago. After a little tuning on the computer I ended up with the following: 301 hp @ 5800 rpm (still made 300hp @ 6300) 313 ftlb @ 4400 rpm That's with a completely stock LS1. I do have a custom intake pipe, dual exhaust, and a programable ECU. Not bad through a 700r4 automatic. I was very happy. The ET estimates for that and my 3500 lb truck(3650 with me) is 13.3 seconds. __________________ 1968 Chev SWB with 1998 Corvette LS1 305hp and 320 ftlb to the wheels (stock engine!) AEM EMS and wideband O2 sensors Bowtie Overdrive's 700R4, stage 3 Baer 4 wheel discs and 20s http://iciclelanding.com/aperture?album=2049&view=album

12-26-2003, 01:56 AM	#2
stepside454 Registered User Join Date: Nov 2003 Location: st. louis area Posts: 1,551	very cool, good job __________________ 75 GMC C-15 short/step factory 454, lowered

12-26-2003, 03:08 AM	#3
Smokin72on20s Ebay Junky Join Date: Oct 2003 Location: CO Posts: 893	i thought an LS1 vette motor made 345hp? is that an f-body motor? __________________ 1972 CHEVY C-10 SWB 2WD - Possible Typhoon 4.3 turbo drivetrain.. 1983 Chevy c10 swb 2wd - possible 350tbi supercharged...

12-26-2003, 03:17 AM	#4
Tmax Registered User Join Date: Feb 2003 Location: Chicago Area Posts: 35	The 345 hp rating for the LS1 vette is at the flywheel, not at the rear wheels. When you factor in the typical 15 to 20 percent drivetrain loss, his 301 hp is probably 350-360 hp at the flywheel, so I would say that his motor is as strong or stronger than a typical vette. The only difference between F bodies and vette LS1's is the exhaust, which he has changed over to something more similar to the vette as I understand it. Very well done!! I hope my conversion comes out as strong as his. I am using Hooker long tube headers on my LS1 project, so I am hoping to at least equal these numbers. __________________ Tmax 1967 Chevy C10 Longbed Fleet 1970 Chevy C10 Longbed Fleet 1971 Chevy C10 Shortbed Fleet (Currently getting a 99 LS-1) 1941 International KB-5 Streetrod(Chevy 350/350TH Powertrain)

12-26-2003, 03:47 AM	#5
Injected68LS1 Registered User Join Date: Jul 2003 Location: So. Cal. Posts: 389	That's true Tmax. I'm actually using the factory corvette exhaust manifolds. They're almost layed out like headers. I'm actually changing the exhaust soon so I'll probably pick up at least 10 horse. Can't wait to see your conversion. Have any pics?? __________________ 1968 Chev SWB with 1998 Corvette LS1 305hp and 320 ftlb to the wheels (stock engine!) AEM EMS and wideband O2 sensors Bowtie Overdrive's 700R4, stage 3 Baer 4 wheel discs and 20s http://iciclelanding.com/aperture?album=2049&view=album

12-26-2003, 11:21 AM	#6
lukecp Formerly yellow72custom Join Date: May 2001 Location: Austin, TX Posts: 7,531	Sweet power numbers! I remember reading in Popular Hot Rodding that the LS1 was under rated....they dyno'd one in a Trans Am and it had like 299 at the rear wheels. Sounds like a fun little truck __________________ '72 Chevy C10 Mild 350/TH350/3.07. Ochre/White. Old high school ride. '70 GMC C2500 '62 327 4bbl/SM465/4.56-geared Dana 60. White/White. Project or parts truck. '97 Saturn SL DD. 1.9/5-speed. 40+ highway mpg

12-26-2003, 12:47 PM	#8
N2TRUX Happy to be here Join Date: Mar 2000 Location: Cypress, TX Posts: 39,021	Injected68LS1 , Did you do a print out? I would really like to see the hp/tq curve. I have a 99 LS1 in my 82 Blazer with a 4L60E, and 3.73 gears. It has a set of Street & Performance "shorty" headers, and a true dual exhaust, with hi-flow cats. I am curious to see your curve, so I can guess how my combo would perform.... __________________ Follow me on Facebook and Instagram @N2trux.com Articles- "Jake" the 84 to 74 crewcab "Elwood" the77_Remix 85 GMC Sierra "Scarlett" "Refining Sierra"

12-26-2003, 05:27 PM	#9
Injected68LS1 Registered User Join Date: Jul 2003 Location: So. Cal. Posts: 389	I have to pull the graph off of the dyno computer. I'll post it soon. I still have some tuning to do. I'm missing some torque down low. __________________ 1968 Chev SWB with 1998 Corvette LS1 305hp and 320 ftlb to the wheels (stock engine!) AEM EMS and wideband O2 sensors Bowtie Overdrive's 700R4, stage 3 Baer 4 wheel discs and 20s http://iciclelanding.com/aperture?album=2049&view=album

12-27-2003, 01:51 PM	#10
N2TRUX Happy to be here Join Date: Mar 2000 Location: Cypress, TX Posts: 39,021	Thanks, post it when you can....



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