Whatever!!!!!!!!! Gearhead-EFI Edition

[Six_Shooter]

confident, just broke.

LOL!

[EagleMark]

Page 100!

[1project2many]

Whats wrong with the I6? And why a V6 to replace it as oposed to another I6?
I know nothing about nissan, so I dont know if there are problems with that engine. But I know I love the 4.0 I6 in my jeeps and wouldnt swap it out for any V6 out there.

I really want to build an EFI version of one of these:
http://6066gmcclub.com/gmcguy/EngineData.html

[RobertISaar]

maybe then they wouldn't need to pull their own refueling station behind them?

[ony]

my friend had a 1966 2 1/2 ton gmc with a 5 speed overdrive,i drove it around a little while not loaded the way I drive it got 16-18 country driving,loaded it would get 8-12.

[EagleMark]

That V12 looked pretty cool!

[RobertISaar]

my friend had a 1966 2 1/2 ton gmc with a 5 speed overdrive,i drove it around a little while not loaded the way I drive it got 16-18 country driving,loaded it would get 8-12.

i know comparing consumer trucks with something like a 2.5 ton truck is kind of a skewed comparison, but a 5 speed was available that far back?

[1project2many]

my friend had a 1966 2 1/2 ton gmc with a 5 speed overdrive,i drove it around a little while not loaded the way I drive it got 16-18 country driving,loaded it would get 8-12.

That's absolutely amazing. Many of those trucks used a 5 speed trans that was 1:1 in fifth gear and would get between 6-10 unloaded. My grandfather had a Jimmy with the V8 and it was in the 2-4 mpg range loaded. But, as my father told me, it would do the governed speed of 60mph up any hill, regardless of the load. My experience with that old engine is limited and it may be that some V6es did better due to different head/displacement configurations.

maybe then they wouldn't need to pull their own refueling station behind them?

That's the thinking. The carbs are not very efficient, especially the early 1bbl. And the manifold is too big. And compression is a paltry 7.5:1. And look at the rpm for peak torque numbers... 1900-2300 RPM. What a challenging speed to run at for proper mixture and fuel vaporization. I really, really want to try my hand at building one of these with computerized controls and EFI. And if I had a machine shop, maybe a set of aluminum heads, too.

Now, I'm not so sure a Datsun Z car would benefit from a 900# V6 that makes killer torque below 300 RPM but it's definitely more original than a crate 350 SBC.

i know comparing consumer trucks with something like a 2.5 ton truck is kind of a skewed comparison, but a 5 speed was available that far back?

New Process, Spicer, and Clark all made 5 speeds but not all were equipped with OD. Most were 1:1 in fifth and most of the medium duty trucks I've worked on were not equipped with OD trannies. In many cases the trucks were spec'ed with two speed rear differentials.
http://www.chevyc60.com/the_transmission_page.htm

About 1/2 way down there's some more info on the 5 speeds.
http://6066gmcclub.com/gmcguy/SM420.html

[RobertISaar]

9.78:1 1st gear on the 8 speed?1/1?

i've been in trucks with creeper gears before, but that is something else.

[ony]

I said it was a overdrive,that is what demsee told me. it had that little pitch fork on the shifter knob. old demsee may have done a lot of modifieng he had the first jeep truck that I ever seen with a 350 auto trans an still 4 wheel drive. his gmc got 5-6 more mpg than his jeep truck if they was drove trying to conserve fuel and up keep.

[phlips308]

I really want to build an EFI version of one of these:
http://6066gmcclub.com/gmcguy/EngineData.html

overhauled a v6 that was in a 62 chevy pickup. it was a 478.lots of torque,and sounds cool with 2.75" strait pipes.

[34blazer]

Only saw a BB6 once in person, plaid valve covers and all. lol

Always thought they were cool engines.

[1project2many]

overhauled a v6 that was in a 62 chevy pickup. it was a 478.lots of torque,and sounds cool with 2.75" strait pipes.

Years ago the local fairground truck pulling champ switched out a 327 for a 305/6. He reported gobs of torque... and started losing pulls because the truck wasn't set up for it. I've driven some of the larger V6's in C50 and C60 trucks and they have as much power as a BBC 427. A 428 in a small truck would be just plain fun.

[RobertISaar]

i wonder how they would do with a modern 6 speed auto/manual? they don't look to be very rev-happy, but if they can make the torque needed, that won't be too much of an issue.

[dave w]

i wonder how they would do with a modern 6 speed auto/manual? they don't look to be very rev-happy, but if they can make the torque needed, that won't be too much of an issue.

I've heard similar comments on Diesel engines "they don't look to be very rev-happy"; but a Diesel will make "the" torque.

My only experience with one of these V6 engines was in the summer of '76, I was hired to haul wheat from the farm to the elevator in the mid-west. I think it was a '72 C50 or C60 with either the 432 or 478. What I remember was that truck would easily exceed the National 55 MPH speed limit with a fully loaded GVW of about 24,000 lbs. In '77 the gas powered truck I used in the summer of '76 was replaced with an IH truck with a Cummins diesel that was about 38,000 lbs GVW fully loaded. Ever wonder if a mid-west county bridge rated for 10 tons will hold a fully loaded truck @ 38,000 lbs? The answer is yes, but I needed to go slow and listen to some very scary creaking noises!

dave w

dave w