New 2 the v6 game. Need opinions. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

ozzie50 · 07-17-2009, 01:29 PM

Okay, so I have a 4.3 litter (doing another frame swap to a 1950 gmc) I have always had 350's carburated. If you were going to go through a 4.3 and make it have over 200 or so horse power what would you do? Its a 1991. I really don't want to put the money into supercharging it. Just want a nice reliable driver.

ProStreet68SB · 07-17-2009, 03:39 PM

are you going to keep if Injected or do you want to make it carburated?

ozzie50 · 07-17-2009, 04:55 PM

I would like to keep it injected. But not 100% a must.

**GruntMoanCough** · 07-17-2009, 06:24 PM

Welcome ozzie!
Do a google search, there's lots of info on the web.
200 HP's not a problem. Just consider it a SBC with 2 less cylinders.
Check out "Doug Anderson's- Rebuilding the 262" for history and info on the engine.

68C15 · 07-17-2009, 07:21 PM

personally i would go for a first generation Vortec (92-95). the one with an aluminum upper intake and one injector. they seem to make good power in stock form and are more reliable than the CSFI (96-04 ?) models.

lowrollin70gmc · 07-26-2009, 05:20 PM

200 horse is easy, the factory ones are rated at near that in the later models. (My '03 is 195 horse stock).

Here's a few helpful sites:
S10 4.3L Forum
4.3 Performance Sticky

Getting up to 200hp should only involve a better exhaust, my 5 speed S10s is super restrictive in the y-pipe (down to ~1.5" OD). A cam swap will also put more power in the motor, but that can get pricey for a v6 as it's not as popular as a small block cam.

Damien · 09-01-2009, 12:54 PM

The '91 block is most likely a roller cam. The flat tappet I put in my 4.3 was about $140.

07-17-2009, 01:29 PM	#1
ozzie50 Registered User Join Date: Jul 2009 Location: tulsa Posts: 89	New 2 the v6 game. Need opinions. Okay, so I have a 4.3 litter (doing another frame swap to a 1950 gmc) I have always had 350's carburated. If you were going to go through a 4.3 and make it have over 200 or so horse power what would you do? Its a 1991. I really don't want to put the money into supercharging it. Just want a nice reliable driver.

07-17-2009, 03:39 PM	#2
ProStreet68SB The Engine Whisperer Join Date: Sep 2006 Location: Ohio Posts: 770	Re: New 2 the v6 game. Need opinions. are you going to keep if Injected or do you want to make it carburated?

07-17-2009, 04:55 PM	#3
ozzie50 Registered User Join Date: Jul 2009 Location: tulsa Posts: 89	Re: New 2 the v6 game. Need opinions. I would like to keep it injected. But not 100% a must.

07-17-2009, 06:24 PM	#4
GruntMoanCough Registered User Join Date: May 2009 Location: Pemberton, BC Posts: 1,075	Re: New 2 the v6 game. Need opinions. Welcome ozzie! Do a google search, there's lots of info on the web. 200 HP's not a problem. Just consider it a SBC with 2 less cylinders. Check out "Doug Anderson's- Rebuilding the 262" for history and info on the engine. __________________ My goal in life is to be as good a person as my dog already thinks I am - Unknown

07-17-2009, 07:21 PM	#5
68C15 blood type; Retumbo Join Date: Jan 2004 Location: next to my reloading bench Posts: 10,269	Re: New 2 the v6 game. Need opinions. personally i would go for a first generation Vortec (92-95). the one with an aluminum upper intake and one injector. they seem to make good power in stock form and are more reliable than the CSFI (96-04 ?) models.

07-26-2009, 05:20 PM	#6
lowrollin70gmc Too many projects Join Date: Mar 2004 Location: Fargo, ND land of the flat hills Posts: 1,147	Re: New 2 the v6 game. Need opinions. 200 horse is easy, the factory ones are rated at near that in the later models. (My '03 is 195 horse stock). Here's a few helpful sites: S10 4.3L Forum 4.3 Performance Sticky Getting up to 200hp should only involve a better exhaust, my 5 speed S10s is super restrictive in the y-pipe (down to ~1.5" OD). A cam swap will also put more power in the motor, but that can get pricey for a v6 as it's not as popular as a small block cam. __________________ Andrew 84 GMC C1500 SWB 6.2 Diesel/700R4/3.42 "Grandpa's odd duck" 70 GMC C1500 LWB My first truck: shaved, bagged, and more: the lowrollin70gmc 68 K20 Suburban 12V Cummins/NV5600/NP205/D60/11.5AAM 3.73s "Dakota Cadillac" 63 Chevy II Nova Coupe 250 I6/T56/4.56s "Economy car" 53 Willys Wagon 350/NV4500/BW4401/HP D44/9inch “Winter Wagon” 30 Model A 16 Focus ST Last edited by lowrollin70gmc; 07-26-2009 at 05:22 PM.

09-01-2009, 12:54 PM	#7
Damien Registered User Join Date: Mar 2007 Location: Farmington, MN Posts: 928	Re: New 2 the v6 game. Need opinions. The '91 block is most likely a roller cam. The flat tappet I put in my 4.3 was about $140. __________________ I can still count my vehicles on two... wait three hands.

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