engine horsepower estimate - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Phjeo · 11-25-2015, 05:34 PM

Hey Guys, i have been a member on here for a while but haven't posted much. wondering if someone could help me with estimating the HP of my new motor.

Here are the details i know of
350 chevy block bored .30 over
stock crank
extreme energy XE274H-10 comp cam
stock rods
roller rockers
flat top pistons
Edelbrock performer 6073 heads that have been decked
Edelbrock performer air gap intake
Holley 750 carb that i need to jet back a bit

Marv D · 11-25-2015, 09:04 PM

The Performer heads will easily support 1HP per cube. Sounds like a well built motor, if cylinder seal is good I'm sure you have made or exceeded that.

cableguy0 · 11-25-2015, 09:44 PM

If compression is at 10-1ish I will say 375hp and 415ft lbs of torque. Lower compression and the numbers drop. As Marv stated its a good combo and you didn't over cam your setup. It should be a good runner. Regardless of the actual dyno numbers the seat of the pants dyno should be happy. That combo is going to like a lot of timing though. I wouldn't be surprised if it wants 36-38 total at 3k rpm and likely 16-18 at idle.

Phjeo · 11-28-2015, 12:36 PM

thanks for the reply guys. looking forward to getting this motor in and running. it's replacing a tired out 283 so i am sure the "seat pant dyno" will be much different than the old motor.

11-25-2015, 05:34 PM	#1
Phjeo Registered User Join Date: Jun 2013 Location: Ailsa Craig Ontario Canada Posts: 11	engine horsepower estimate Hey Guys, i have been a member on here for a while but haven't posted much. wondering if someone could help me with estimating the HP of my new motor. Here are the details i know of 350 chevy block bored .30 over stock crank extreme energy XE274H-10 comp cam stock rods roller rockers flat top pistons Edelbrock performer 6073 heads that have been decked Edelbrock performer air gap intake Holley 750 carb that i need to jet back a bit __________________ 1972 Chevy C10 SWB 2wd 1987 Chevy 4x4 SWB 1997 GMC SWB 2wd 2007 GMC Z71 extended cab 4x4

11-25-2015, 09:04 PM	#2
Marv D Registered Truck Offender Join Date: May 2008 Location: hells training ground (aka Ariz) Posts: 3,118	Re: engine horsepower estimate The Performer heads will easily support 1HP per cube. Sounds like a well built motor, if cylinder seal is good I'm sure you have made or exceeded that. __________________ Still playin with trucks, even at my age! When you're dead, it's only a problem for the people around you, because you don't know you're dead. .....It's kinda the same when your STUPID. I just did my taxes and reviewed my SS statement. Thanks to the current administration it looks like I will only have to work till noon on the day of my funeral.

11-25-2015, 09:44 PM	#3
cableguy0 Senior Member Join Date: Apr 2000 Location: Delta,Pa Posts: 14,950	Re: engine horsepower estimate If compression is at 10-1ish I will say 375hp and 415ft lbs of torque. Lower compression and the numbers drop. As Marv stated its a good combo and you didn't over cam your setup. It should be a good runner. Regardless of the actual dyno numbers the seat of the pants dyno should be happy. That combo is going to like a lot of timing though. I wouldn't be surprised if it wants 36-38 total at 3k rpm and likely 16-18 at idle. __________________ Owner of North Point Car Care in Dundalk Md. We specialize in custom exhaust on both modern and classic vehicles. We are a full service auto shop from classics to modern vehicles. Feel free to contact me with questions. I will give a 10% discount to any board member.

11-28-2015, 12:36 PM	#4
Phjeo Registered User Join Date: Jun 2013 Location: Ailsa Craig Ontario Canada Posts: 11	Re: engine horsepower estimate thanks for the reply guys. looking forward to getting this motor in and running. it's replacing a tired out 283 so i am sure the "seat pant dyno" will be much different than the old motor. __________________ 1972 Chevy C10 SWB 2wd 1987 Chevy 4x4 SWB 1997 GMC SWB 2wd 2007 GMC Z71 extended cab 4x4



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