How much horsepower do you have? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

jrsmith_2010 · 09-14-2008, 12:53 AM

hey guys, me and my dad are about to do some work on my 79s motor. to get the most out of it that my wallet can handle

just wandering how much everyone else is making, and what did u do to get that? thanks

74 shortbed 406 · 09-14-2008, 02:45 AM

You need to include more details like heads(aluminum or iron), 2wd or 4wd is a little helpful, pump gas or up to alcohol. Ihad a 355 in a 81 4wd that was around 350-375 hp with 10:1 and aluminum heads on premium. What size you are putting in is also helpful, bbc or sbc??

jrsmith_2010 · 09-14-2008, 10:02 AM

ok for a 2wd, 350, with or without aluminum heads, cam, pump gas

jrsmith_2010 · 09-14-2008, 10:57 AM

doin some lookin, anybody have these heads by summit racing?

http://store.summitracing.com/partde...5&autoview=sku

Albatrossian · 09-14-2008, 08:17 PM

I'm running a 355 with a set of 2.02 double hump heads, ported and polished, steel crank, LT1 rods, forged flattops running about 10:1. 780cfm QJet, Performer RPM gasket matched, Hedman long tube headers with 1-5/8" primaries to 3" collectors running to Cherry Bomb header mufflers. The cam is .480" lift on 110 degree CL. MSD 6AL box with MSD cap, rotor and coil with Accel wires. I'm guessing it's putting a little over 300 to the tires, probably about 400 at the crank.
Those summit heads are basically the old double hump heads. They're great heads for the price.

pilotj · 09-14-2008, 09:02 PM

I believe this is a review of those summit heads.
http://67-72chevytrucks.com/vboard/s...d.php?t=286584

jrsmith_2010 · 09-14-2008, 08:45 PM

yea they r, but i just noticed that that is for one head, so its 350 per head, idk ive never bought these before, all i know is that i need a 2.02 set of heads. can anyone help?

Albatrossian · 09-14-2008, 08:50 PM

I'd check your local machine shops and salvage yards.. I'm sure you can get both for a bunch cheaper for $350.
The old saying is, speed is money.. how much do you want to spend?

jrsmith_2010 · 09-14-2008, 09:32 PM

well i have about 800 or so after i get my truck painted, im just findin the best speed for the money

Albatrossian · 09-14-2008, 09:47 PM

Quote:

Originally Posted by jrsmith_2010

well i have about 800 or so after i get my truck painted, im just findin the best speed for the money

You make all your power in the heads. Run a good exhaust with an x-pipe to get it all out. Buy a good, streetable cam that you don't need a vacuum can to run your brakes off. I'm assuming the truck is going to be a daily driver. With $800, you can buy a master rebuild kit, a good cam and have your heads re-worked(3 angle, clean the bowls up, maybe a good port job) and make a good 300hp. You start getting radical cams and you'll have to start worrying about matching your converter to the cam. A good stall converter will run about $250 or better.

*78 Chevyrado* · 09-14-2008, 11:01 PM

Truck had 165hp 100k miles ago, who knows now.

HarrisonTX · 09-15-2008, 04:17 PM

310 HP edelbrock "performer" crate motor. (310 at the crank)
It wont get out of its own way.

Albatrossian · 09-15-2008, 04:23 PM

Quote:

Originally Posted by HarrisonTX

310 HP edelbrock "performer" crate motor. (310 at the crank)
It wont get out of its own way.

Really? You'd think that it'd be a pretty strong motor.. depending on the trans, it should be putting 210-220 to the ground

swb85 · 09-15-2008, 04:48 PM

~450hp/450ft lbs at the flywheel. It gets out of it's own way.

gchemist · 09-15-2008, 06:01 PM

355 bone stock ZZ4

More than 355+

355+ for sure with a 750 CFM carb waiting for install in this setup.

AceX · 09-15-2008, 06:47 PM

I'm still working on a plan to extract 400+ from a 350 and still smog it without breaking the bank...

77 350 Shorty Wide · 09-15-2008, 07:15 PM

I think it's time for Turbonium

454HO · 09-15-2008, 07:39 PM

My carb'd vortec 454 should be making at least 290HP and 410lb-ft torque. It will roast the right side tire all the way through first and well into second if I let it. That is with a stock torque converter and 2.72 gears with a peg leg diff. Tires are 275/60's. I would guess it could run a mid 15 sec 1/4 mile as it is.Will be putting in 3.73 gears and a posi soon I hope.

Matt_ks · 09-22-2008, 08:38 PM

Well bud, a motor is just a huge vaccume pump, so the more air u can get into the combustion chamber, and the exspell it the more HP u will make, but their is such thing as too big, so here is a idea u could try.. Get your self a set if either Vortec heads or a good set of 202/160 heads. pair it up with a good low to mid range cam say a lunati Bracket master 480 lift or even a 350 horse 327 cam and, then bump the Comp ratio up a bit and im willing to bet that u will see close to 400 or more at the flexplate!

DirtyLarry · 09-22-2008, 10:10 PM

My buddy in Michigan runs a bored and whored rear digger S10 and claims to squeeze around 350 HP from a 355 small block with a mild Lunati cam, Vortec heads, and Demon carb. The bottom end is a relatively stock 4 bolt.

I have never dyno’d anything I own nor ever really cared to. Although, the guy that helped tune the Vortec 8.1L I just stuffed into my 78’ K10 claims it should run around 425HP and 480 to 500 LB FT of torque. I doubt I will ever dyno it either but from the seat of the paints feel the custom calibrated non-emissions 8.1L definitely feels a heck of a lot stronger than the 8.1L in my stock 2001 Silverado by far. It does feel pretty quick for a 6800 lb truck even mowing through an old school SM465 transmission. It breaks U-joints and leaf springs real easy now.

knightlife · 09-22-2008, 10:00 PM

alba... you and I have the same setup!!!!

09-14-2008, 12:53 AM	#1
jrsmith_2010 I like turtles... Join Date: May 2008 Location: Kansas Posts: 993	How much horsepower do you have? hey guys, me and my dad are about to do some work on my 79s motor. to get the most out of it that my wallet can handle just wandering how much everyone else is making, and what did u do to get that? thanks __________________ 1979 Silverado- lowered 5/7, 20 inch Boss rims, everything shaved, caddy lights, billet interior, UP FOR SALE! 1983 Scottsdale-on the back burner...SOLD!!! 1992 Silverado- extended cab, stock for now, but no promises SOLD!!! 2006 Chevy Cobalt-college car, staying stock Whatever can't get fixed with a hammer, a roll of duct tape, a clothes hanger, a tube of glue, and a case of beer, can wait until tomorrow. Last edited by jrsmith_2010; 09-14-2008 at 01:07 AM.

09-14-2008, 02:45 AM	#2
74 shortbed 406 Registered User Join Date: May 2005 Location: Bowling Green, Mo Posts: 204	Re: How much horsepower do you have? You need to include more details like heads(aluminum or iron), 2wd or 4wd is a little helpful, pump gas or up to alcohol. Ihad a 355 in a 81 4wd that was around 350-375 hp with 10:1 and aluminum heads on premium. What size you are putting in is also helpful, bbc or sbc?? __________________ 1978 GMC K25 2002 Dodge Dakota R/T rc swb In need of some more goodies.

09-14-2008, 10:02 AM	#3
jrsmith_2010 I like turtles... Join Date: May 2008 Location: Kansas Posts: 993	Re: How much horsepower do you have? ok for a 2wd, 350, with or without aluminum heads, cam, pump gas __________________ 1979 Silverado- lowered 5/7, 20 inch Boss rims, everything shaved, caddy lights, billet interior, UP FOR SALE! 1983 Scottsdale-on the back burner...SOLD!!! 1992 Silverado- extended cab, stock for now, but no promises SOLD!!! 2006 Chevy Cobalt-college car, staying stock Whatever can't get fixed with a hammer, a roll of duct tape, a clothes hanger, a tube of glue, and a case of beer, can wait until tomorrow.

09-14-2008, 10:57 AM	#4
jrsmith_2010 I like turtles... Join Date: May 2008 Location: Kansas Posts: 993	Re: How much horsepower do you have? doin some lookin, anybody have these heads by summit racing? http://store.summitracing.com/partde...5&autoview=sku __________________ 1979 Silverado- lowered 5/7, 20 inch Boss rims, everything shaved, caddy lights, billet interior, UP FOR SALE! 1983 Scottsdale-on the back burner...SOLD!!! 1992 Silverado- extended cab, stock for now, but no promises SOLD!!! 2006 Chevy Cobalt-college car, staying stock Whatever can't get fixed with a hammer, a roll of duct tape, a clothes hanger, a tube of glue, and a case of beer, can wait until tomorrow.

09-14-2008, 08:17 PM	#5
Albatrossian Georgia Boy Join Date: Jun 2008 Location: Douglas, Georgia Posts: 370	Re: How much horsepower do you have? I'm running a 355 with a set of 2.02 double hump heads, ported and polished, steel crank, LT1 rods, forged flattops running about 10:1. 780cfm QJet, Performer RPM gasket matched, Hedman long tube headers with 1-5/8" primaries to 3" collectors running to Cherry Bomb header mufflers. The cam is .480" lift on 110 degree CL. MSD 6AL box with MSD cap, rotor and coil with Accel wires. I'm guessing it's putting a little over 300 to the tires, probably about 400 at the crank. Those summit heads are basically the old double hump heads. They're great heads for the price.

09-14-2008, 09:02 PM	#6
pilotj Registered User Join Date: May 2007 Location: Roanoke, VA Posts: 78	Re: How much horsepower do you have? I believe this is a review of those summit heads. http://67-72chevytrucks.com/vboard/s...d.php?t=286584 __________________ 1979 Chevy C20 350/TH400 1974 Chevy C30 350/4speed

09-14-2008, 08:45 PM	#7
jrsmith_2010 I like turtles... Join Date: May 2008 Location: Kansas Posts: 993	Re: How much horsepower do you have? yea they r, but i just noticed that that is for one head, so its 350 per head, idk ive never bought these before, all i know is that i need a 2.02 set of heads. can anyone help? __________________ 1979 Silverado- lowered 5/7, 20 inch Boss rims, everything shaved, caddy lights, billet interior, UP FOR SALE! 1983 Scottsdale-on the back burner...SOLD!!! 1992 Silverado- extended cab, stock for now, but no promises SOLD!!! 2006 Chevy Cobalt-college car, staying stock Whatever can't get fixed with a hammer, a roll of duct tape, a clothes hanger, a tube of glue, and a case of beer, can wait until tomorrow.

09-14-2008, 08:50 PM	#8
Albatrossian Georgia Boy Join Date: Jun 2008 Location: Douglas, Georgia Posts: 370	Re: How much horsepower do you have? I'd check your local machine shops and salvage yards.. I'm sure you can get both for a bunch cheaper for $350. The old saying is, speed is money.. how much do you want to spend?

09-14-2008, 09:32 PM	#9
jrsmith_2010 I like turtles... Join Date: May 2008 Location: Kansas Posts: 993	Re: How much horsepower do you have? well i have about 800 or so after i get my truck painted, im just findin the best speed for the money __________________ 1979 Silverado- lowered 5/7, 20 inch Boss rims, everything shaved, caddy lights, billet interior, UP FOR SALE! 1983 Scottsdale-on the back burner...SOLD!!! 1992 Silverado- extended cab, stock for now, but no promises SOLD!!! 2006 Chevy Cobalt-college car, staying stock Whatever can't get fixed with a hammer, a roll of duct tape, a clothes hanger, a tube of glue, and a case of beer, can wait until tomorrow.

09-14-2008, 11:01 PM	#11
78 Chevyrado Account Suspended Join Date: Dec 2007 Location: Unnapreciative, Trollville Posts: 2,079	Re: How much horsepower do you have? Truck had 165hp 100k miles ago, who knows now.

09-15-2008, 04:17 PM	#12
HarrisonTX Registered User Join Date: Nov 2003 Location: Waco TX Posts: 247	Re: How much horsepower do you have? 310 HP edelbrock "performer" crate motor. (310 at the crank) It wont get out of its own way. __________________ '69 custom/camper '74 260z 302 chevy/tko500 swap in progrss '79 Malibu 355 all forged 4 speed car. '86 k5 blazer '06 Duramax

09-15-2008, 04:48 PM	#14
swb85 On a budget like Fred Sanford Join Date: Oct 2005 Location: Topeka, KS Posts: 2,031	Re: How much horsepower do you have? ~450hp/450ft lbs at the flywheel. It gets out of it's own way. __________________ '85 Silverado swb: 383 stroker, 10.5:1, vortec heads, 232/238 roller cam, RPM air gap, performer 750 carb, stainless longtubes, 3" duals/super 44's, T56/4.11 383ci build / exterior refresh thread '98 Camaro z28: 370ci twin turbo 370ci build '01 Tahoe LT 4x4: 5.3, longtubes/ory, magnaflow duals, custom tune....wife's DD Last edited by swb85; 09-15-2008 at 04:49 PM.

09-15-2008, 06:01 PM	#15
gchemist BAD BOW-Silverado XST Join Date: May 2000 Location: Senior Member from Austin, TX Posts: 6,431	Re: How much horsepower do you have? 355 bone stock ZZ4 More than 355+ 355+ for sure with a 750 CFM carb waiting for install in this setup. __________________ Gerardo a.k.a. Mad Chemist Silverado XST videos

09-15-2008, 06:47 PM	#16
AceX >130dB Moderator Join Date: Aug 2006 Location: Sacramento, CA Posts: 2,130	Re: How much horsepower do you have? I'm still working on a plan to extract 400+ from a 350 and still smog it without breaking the bank... __________________ Living Life @ 130dB LED Tail Light Conversion; How-to Friend. Father. Brother. RIP El Jay ------------------------------------------------------------------------------------------------------------------------- CLICK HERE and for less than $0.07 a day, you too can help support and build a better forum.

09-15-2008, 07:15 PM	#17
77 350 Shorty Wide Registered User Join Date: Dec 2006 Location: Yakima, WA Posts: 325	Re: How much horsepower do you have? I think it's time for Turbonium



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09-15-2008, 07:39 PM	#18
454HO Registered User Join Date: Apr 2005 Location: Austin, TX Posts: 1,223	Re: How much horsepower do you have? My carb'd vortec 454 should be making at least 290HP and 410lb-ft torque. It will roast the right side tire all the way through first and well into second if I let it. That is with a stock torque converter and 2.72 gears with a peg leg diff. Tires are 275/60's. I would guess it could run a mid 15 sec 1/4 mile as it is.Will be putting in 3.73 gears and a posi soon I hope. __________________ - Greg

09-22-2008, 08:38 PM	#19
Matt_ks Registered User Join Date: Feb 2008 Location: El Dorado KS Posts: 67	Re: How much horsepower do you have? Well bud, a motor is just a huge vaccume pump, so the more air u can get into the combustion chamber, and the exspell it the more HP u will make, but their is such thing as too big, so here is a idea u could try.. Get your self a set if either Vortec heads or a good set of 202/160 heads. pair it up with a good low to mid range cam say a lunati Bracket master 480 lift or even a 350 horse 327 cam and, then bump the Comp ratio up a bit and im willing to bet that u will see close to 400 or more at the flexplate!

09-22-2008, 10:10 PM	#20
DirtyLarry Windy Corner of a Dirty Street Join Date: Jun 2003 Location: Pueblo West, Colorado Posts: 2,926	Re: How much horsepower do you have? My buddy in Michigan runs a bored and whored rear digger S10 and claims to squeeze around 350 HP from a 355 small block with a mild Lunati cam, Vortec heads, and Demon carb. The bottom end is a relatively stock 4 bolt. I have never dyno’d anything I own nor ever really cared to. Although, the guy that helped tune the Vortec 8.1L I just stuffed into my 78’ K10 claims it should run around 425HP and 480 to 500 LB FT of torque. I doubt I will ever dyno it either but from the seat of the paints feel the custom calibrated non-emissions 8.1L definitely feels a heck of a lot stronger than the 8.1L in my stock 2001 Silverado by far. It does feel pretty quick for a 6800 lb truck even mowing through an old school SM465 transmission. It breaks U-joints and leaf springs real easy now. __________________ Current vehicle collection: 1978 Chevrolet K10, 8.1L, NV4500, NP205 1989 Chevrolet Suburban, 8.1L, NV4500, NP241 1993 Chevrolet C1500 Sportside, TBI 7.4L, 4L60E 2001 Chevrolet K2500HD, Ext Cab, SWB, 8.1L, ZF 6 speed 2014 Chevrolet Impala LTZ 3.6L Vortec 8.1L because life is too short to tolerate underpowered vehicles Instagram

09-22-2008, 10:00 PM	#21
knightlife Dark Heart Motorsports Join Date: Apr 2007 Location: 29404 DKFX Posts: 683	Re: How much horsepower do you have? alba... you and I have the same setup!!!! __________________ How Deep Can YOU Bleed..? 1985 Chevy Blazer K5- 6.2 N/A, 400 turbo trans CUCV, 12v converted... a new chapter 2005 GMC Sierra Crew Cab 6.0 powwwaa!!! custom jumpseat install w/ captain seats, Hypertech tuner, MSD Blaster Coils, CB and twin antenna's, all electric interior, touch screen in dash. custom center console, with jump seat replacing original console. 1500 HD!

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