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03-08-2011, 11:46 PM | #26 |
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Re: HMMMMM the six cylinder's may have some use !
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03-08-2011, 11:48 PM | #27 | |
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Re: HMMMMM the six cylinder's may have some use !
Quote:
i didant mean to hurt your feelings man 20mpg is cool i never said i wasent impressed awsome dude 20mpg **** YEAH!!, the specs on my car are as follows... 350 4 bolt main bored .60 over, .20 under on the rods and mains, H beam rods, plasma rings, 270 roller comp cam, keith black pistons, 202 heads ported and polished, 3 angle valve job, hardend stainless valve seats, holley street dominator single plane intake,a q-jet from a 74' 454 truck, stock exaust manifolds to 2.5 in 40series flowmasters, The transmission is a th350 with a mild shift kit, ported and polished valve body, 2000rpm stall converter. 2.72posi rearend gears tire size 205/70/15.. any other questions i can look in my build sheet.. the motor was built 10years ago by doug timmons and is my daily driver. here are some crapy pics of the motor. ive had this job for 3 years now and a tank of gas last me the whole 5day week i have a 12 gallon tank... (good enough average for me no?) yes i agree they are a majority of freeway miles, but i guess i could still be to ignorant to do basic Arithmetic (awww now im sad)i guess i should go back to school huh? ... any who, have a superfantastic day and enjoy your chevys regardless for fuel milage,,, Ivan(helldiablo)
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The two most important lessons to wrenchin'-1.The only time you have too much fuel is when you're on fire-2. If something hasn't broken, it's about to-- |
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03-08-2011, 11:57 PM | #28 |
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Re: HMMMMM the six cylinder's may have some use !
Ivan, I also have a 65 nova coupe. zz4/hot cam 750 dbl pumper msd hei b&m 350 trans best it has done is 15 mpg and that is ok by me. you should check out Steves nova site I'm on that site all the time just like this site lots of great people! come check it out ! cheers, Pat
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03-09-2011, 01:53 AM | #29 |
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Re: HMMMMM the six cylinder's may have some use !
I have been thinking about the new 4.2L straight 6 out of the Trailblazer/Envoy - 290+ HP, FI, DOHC, and all aluminum! Now I just need to find a short-stepper to put it in.
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"Feast your eyes on a feast of smoke." 67 Chevy Short Fleet PLAN: LQ9, 4L60, D60 Looking for School Bus Gauges - Help me out! |
03-09-2011, 10:26 AM | #30 |
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Re: HMMMMM the six cylinder's may have some use !
Sounds good but I wonder if it would be economically feasable. A Trailblazer doesn't get much better than 20 mpg (mine averages about 19) on the highway and if one can get 20 out of a 250 six with a rear end change and maybe a transmission swap that may be the way to go.
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03-09-2011, 10:47 AM | #31 | |
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Re: HMMMMM the six cylinder's may have some use !
Quote:
Sadly, he flipped the car after a tire blew out in one of his many challenges. I bought the engine installed it in a 55 chevy 2 door sedan with the same pontiac transmission and 3 deuce manifold. Never ran the same. So, hold on to this one and don't make any changes. Just a swap here and there may screw it up. Last edited by 68gmsee; 03-09-2011 at 10:48 AM. |
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03-09-2011, 12:04 PM | #32 |
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Re: HMMMMM the six cylinder's may have some use !
Best I ever got with my six, 3.08 gears and 3-speed was 12.3 MPG. I just popped in a 355 and my mileage went to somewhere around 9-10. I haven't filled up yet, so I don't know. Of course I was hammering on the secondaries as well trying to get the darn thing tuned right. I'll bet that made matters worse. And I was burning out all the time to show off to my buddies. Especially the one who drives the POS Toyota Tacoma and thinks his truck is better than everyone else's. Next on the list: NV4500 and Cliff Ruggles book so I can mod the Q-Jet a little.
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-1967 Chevrolet Fleetside LWB- 350 V8 w/thumpr cam, NV3500, 3.08 gears, A/C, PS -1983 Chevy Silverado C1500- 383 stroker, TH400 -1989 Chevy Silverado K1500 SWB- 5.3L swap, 700R4, 3.42 gears -And a '66 Ford Mustang- 200 I6, C4 trans, rust bucket "The only thing we have to fear is fear itself." -FDR (and maybe rust too) You've gotta be able to stop and steer before you can go fast! |
03-09-2011, 01:56 PM | #33 |
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Re: HMMMMM the six cylinder's may have some use !
I just did a quick mileage check on my 67 C10 stepper with a 350/th350 probably has 3.08 gears (I have not confirmed the ratio). Believe it or not it got 17-18 MPG average split between highway and city driving. Not too bad for a V8 truck without an overdrive.
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Lifes journey is not to arrive at the gate well preserved, it is to slide in sideways all used up and wore out yelling.....God what'a ride! Where patience fails, force prevails Stapp's Ironical Paradox "The universal aptitude for ineptitude makes any human accomplishment an incredible miracle." |
03-11-2011, 12:56 AM | #34 |
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Re: HMMMMM the six cylinder's may have some use !
I was going to replace my straight six 235 for a 350 and decided to keep orig. engine due to too much dinero $$$ to do swap and man Im glad it worked out that way!!! Way keeper to cruise than a V8 especially in Sunny SoCal....
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03-11-2011, 12:58 AM | #35 |
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Re: HMMMMM the six cylinder's may have some use !
Oh by way its a four speed manual trans lol....better mpg...
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03-18-2011, 12:43 PM | #36 |
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Re: HMMMMM the six cylinder's may have some use !
I just traded a rifle for a 283 from a 68' camero.....again my 61' has a 235 straight six in it now with a four speed tranny. Do any of you know what parts I'll need to do the swap? I already researched eng. swap plates from Trans Dapt but need guidence as to where to to install on my truck.....Any info would be greatly appreciated. Thanks fellas...
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03-18-2011, 01:38 PM | #37 | |
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Re: HMMMMM the six cylinder's may have some use !
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03-18-2011, 05:02 PM | #38 | |
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Re: HMMMMM the six cylinder's may have some use !
Quote:
Ron
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03-18-2011, 05:05 PM | #39 |
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Re: HMMMMM the six cylinder's may have some use !
My 250 is a gas hog....4.57s might be the problem
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03-18-2011, 05:17 PM | #40 | |
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Re: HMMMMM the six cylinder's may have some use !
Quote:
The best gas mileage I've had with one of these trucks was 16 on a road trip from Washington to Texas running a 307 with a 4 speed and 3.73 gears. The six it replaced probably got 11 or 12 but I think it went through a half quart of oil per gallon of gas. Just because a truck has a six doesn't mean it will get respectable gas mileage. |
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