Question for 85-87 Owners with 4.3L 262ci V6's - Page 2 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Pyrotechnic · 12-08-2012, 08:40 PM

That's really cool! Sounds awesome too.

66redw/white · 12-11-2012, 09:55 PM

thanks man!

jrblanke · 12-18-2012, 01:42 AM

Thanks for all the replies.

Just wanted to follow up on this thread after filling it up and driving it to work tonight. Tonight was the first time I drove it any distance over 10 miles. It made the 32 mile drive to work without any problems and seemed to get better as I drove it more. It ran just fine on the 87 octane I put in it at the local Kangaroo.

I am now interested in learning more about how the 700R4 works (regarding vacuum controls and the TC). I have not had much experience with these transmissions and need to do some more reading about them.

Thanks again!

SSC's76 · 12-18-2012, 11:32 AM

the 86 I has was converted to a 350 before I got hold of it imo a 4.3 in a long box with a 3.08 rear end is useless. it had a 700r4 from the factory as well the po switched for a th350. from the diagrams and what was left under the hood seems to indicate the 700r4 was controlled by vacuum like the s10's I've always been curious about this anyone have any input?

Posted from 67-72chevytrucks.com App for Android

jrblanke · 12-28-2012, 07:17 PM

So far I have driven 691 miles in the truck. Here are the different MPG I got.

1st fill up 13.3 gallons: mainly back and forth to work which consited of some highway driving and some city driving. 15.6 mpg
2nd fill up 8.9 gallons: (topped off the tank): mainly back and forth to work which consisted of some highway driving and some city driving. 15.4
3rd fill up 13.4 gallons: mostly highway driving 72-77 mph: 14.2
4th fill up 9.5 gallons: drove 142 miles where the speed limit was 55mph. Most of the driving was between 55 and 65mph. 19.2 mpg!

All around average for all 4 fill ups was 15.52 mpg.

79Betty · 05-23-2014, 08:16 PM

Anyone still have a 4.3? I need some exhaust and... Performance

parts but summit jegs etc only lists 5.0 and 5.7. I WILL NOT put in a v8 but the exhaust is horrible along with the smog parts. Are s10 parts interchangeable? Love to put a cam headers n intake in it woth the granny low and 2:73's

MalibuSSwagon · 05-23-2014, 08:27 PM

So, I did an RV cam, longtube headers and tuned the TPI on my stock truck 305, and well.....It runs amazing, gets decent mileage, and loves reving out all the way to 5k rpm, I also have an SM465 and 2.73. I gotta tell ya, I'm left wanting more. I may do a gear swap next.

12-08-2012, 08:40 PM	#26
Pyrotechnic Registered User Join Date: Feb 2007 Location: Austin, TX Posts: 3,930	Re: Question for 85-87 Owners with 4.3L 262ci V6's That's really cool! Sounds awesome too. __________________ 1977 GMC Sierra Grande

12-11-2012, 09:55 PM	#27
66redw/white made in america Join Date: May 2010 Location: baton rouge la Posts: 653	Re: Question for 85-87 Owners with 4.3L 262ci V6's thanks man! __________________ 2005 gmc sierra- 4/6, t56, cammed 5.3. 4.10, big bars, and brakes. sounds good 1964 c10-283 powerpack, 3 on the tree 2004 corvette- lowered, borla, tuned. slow my old girl 1966 c10- 305v8, t-5 sold

12-18-2012, 01:42 AM	#28
jrblanke Registered User Join Date: May 2011 Location: Raleigh, NC Posts: 240	Re: Question for 85-87 Owners with 4.3L 262ci V6's Thanks for all the replies. Just wanted to follow up on this thread after filling it up and driving it to work tonight. Tonight was the first time I drove it any distance over 10 miles. It made the 32 mile drive to work without any problems and seemed to get better as I drove it more. It ran just fine on the 87 octane I put in it at the local Kangaroo. I am now interested in learning more about how the 700R4 works (regarding vacuum controls and the TC). I have not had much experience with these transmissions and need to do some more reading about them. Thanks again!

12-18-2012, 11:32 AM	#29
SSC's76 No No Join Date: Jun 2005 Location: Pueblo Colorado Posts: 1,781	the 86 I has was converted to a 350 before I got hold of it imo a 4.3 in a long box with a 3.08 rear end is useless. it had a 700r4 from the factory as well the po switched for a th350. from the diagrams and what was left under the hood seems to indicate the 700r4 was controlled by vacuum like the s10's I've always been curious about this anyone have any input? Posted from 67-72chevytrucks.com App for Android __________________ 1976 Custom Deluxe SWB Med FMB.3/4 Drop. Gen VI 454, Muncie HD 3 speed With Modified OE Hurst Shifter, 3.73 12 bolt, GMPP HO roller cam, Hooker headers, Performer intake with modified Q-jet, Accel distributor. Best 1/4 12.3 @108. Funnest run 19.84 @88 full 1/4 mile burn out. 1997 K1500 ext cab 5.7 stock except muffler

12-28-2012, 07:17 PM	#30
jrblanke Registered User Join Date: May 2011 Location: Raleigh, NC Posts: 240	Re: Question for 85-87 Owners with 4.3L 262ci V6's So far I have driven 691 miles in the truck. Here are the different MPG I got. 1st fill up 13.3 gallons: mainly back and forth to work which consited of some highway driving and some city driving. 15.6 mpg 2nd fill up 8.9 gallons: (topped off the tank): mainly back and forth to work which consisted of some highway driving and some city driving. 15.4 3rd fill up 13.4 gallons: mostly highway driving 72-77 mph: 14.2 4th fill up 9.5 gallons: drove 142 miles where the speed limit was 55mph. Most of the driving was between 55 and 65mph. 19.2 mpg! All around average for all 4 fill ups was 15.52 mpg.

05-23-2014, 08:16 PM	#31
79Betty Registered User Join Date: Jan 2013 Location: Jasper, IN Posts: 948	Re: Question for 85-87 Owners with 4.3L 262ci V6's Anyone still have a 4.3? I need some exhaust and... Performance parts but summit jegs etc only lists 5.0 and 5.7. I WILL NOT put in a v8 but the exhaust is horrible along with the smog parts. Are s10 parts interchangeable? Love to put a cam headers n intake in it woth the granny low and 2:73's __________________ When in doubt, throttle it out! 1974 Chevrolet Custom K20 2005 Ford Ranger Edge 1985 Chevrolet Custom Deluxe C10

05-23-2014, 08:27 PM	#32
MalibuSSwagon Registered User Join Date: Sep 2009 Location: Weare,NH Posts: 1,592	Re: Question for 85-87 Owners with 4.3L 262ci V6's So, I did an RV cam, longtube headers and tuned the TPI on my stock truck 305, and well.....It runs amazing, gets decent mileage, and loves reving out all the way to 5k rpm, I also have an SM465 and 2.73. I gotta tell ya, I'm left wanting more. I may do a gear swap next. __________________ Eric 1992 Oldsmobile Custom Cruiser 1986 Chevrolet C10\|5.3L\|TKO600\|Shortbed\|Custom Deluxe 1983 Malibu Wagon\|TPI 305\|T5 5 speed\|3.73 non-posi



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