60 degree v6 in a Suburban?

[b1jetmech]

Our 01' venture with 230k miles gets 25 MPG at 70 MPH. I never really checked for around town mileage. The 3400's seem good with fuel, I figure the 3500 would be also.

[b1jetmech]

I seriously thought of it LSX motor but they strike me as expensive to get parts for and I would have to fab up some bracket to use the existing AC compressor where as I can acquire reserpine brackets of a RWD 660 camaro/firbird and utilize all my stock accessories.

There are plenty of untouched LSx's motors in our friendly neighborhood junkyard. $300 dollars out the door with computer and harness(minus accessories). Nobody pulls them, they get recycled

[b1jetmech]

[/QUOTE]I'm not too familiar with gm's ecu's, I left the chevy dealer in '03, how tune-able is this ecm and how much does tuning equipment cost?

yeah if your trailblazing like this I agree, get it running first, but keep it in mind when re-engineering, and I like to make things so its easy to pull the assembly if needed, like mounting/wiring the pcm so the engine can be removed with the harness. every man needs a welder, get it back lol


I have already embarrassed quite a few drivers on the road, tunning takes some reading,time and a wide band, give it try, you sound well qualified.
you cant beat a diesel, look into an ALH from a vw, mine has over 300ftlbs after a reflash and injectors, I pulled my buds caravan from a busy street when it broke down with it and floored it, he said it put him back in his seat, I felt like i was towing an anchor but easily merged with traffic lol[/QUOTE]

I'm understanding the 7730 ECM from the late 80's early 90's? I don't know much about the later ECMs the OBD2 and later. I do know the 411 ECM used with the LS motors are excellent but haven't a clue on how to the tune them.

I actually looked into an ALH because they can reach 350 ft-lbs of torque with minimal mods. My 305 was a factory 255 torque and still manage to pull our 26 ft travel trailer.

However, diesel is at $4.20 a gallon where I'm at and gas is $3.49 so that kinda throws a wrench in it.

[b1jetmech]

The problem is that the nut behind the wheel of this particular van is a certain female and when I ask why the average fuel economy always goes up when I drive it, she just looks away... Regardless, the thing is still a pig. The last U-vans had so much frontal area, it is a hopeless case for aero on the freeway too.



Mine is more awesome with alloy wheels and roof rack spars...

How about a 3900 swap in that???

[js35]

However, diesel is at $4.20 a gallon where I'm at and gas is $3.49 so that kinda throws a wrench in it.

Its similar here, but its always equaled out better for me, I beat the crap out of this car and have never got below 42mpg, grandpa driving will net close to 60. Ive seen a four runner put down 30's with that engine. One last suggestion, dont know how much room your willing to sacrifice but you could always go with a setup like this with some wood gas and say f petroleum prices

[js35]

The problem is that the nut behind the wheel of this particular van is a certain female

oh I don't think any man on earth knows how to adjust that type of nut, I got lucky with a early grandma driver, maybe a real stiff spring on the throttle? just put a lil slop in it so its a real calf cramp to to get past 15% throttle lmao

[carbon]

How about a 3900 swap in that???

The funny thing is the 3900 was optional and the last year they were made, they only had the 3900. And beyond that, the transmission came with a 3.69 final drive when paired with the 3900, as opposed to the 3.29 with the 3500. Guess what? 40HP increase and a hell of a lot easier to drive with the same fuel economy. Something to be said for not putting a too small of an engine in a large vehicle.

[1QUICKHATCH]

I am going to be starting almost the same swap as you are thinking of soon in a 1993 c1500. It has a 350 tbi, 4l60e, 3.73 gear... going to use obd II because I have the stuff to tune it already. I am planing on keeping the 4l60e that is in it by using the same adaptor that mars used
http://www.speedwaymotors.com/Chevy-...ates,3280.html just have a few more parts to collect before I start the swap!

[caffeine]

Can any OBDII 60* PCMs control a 4L60E? Your best bet for simplicity is probably the 93-95 F-body 3.4 which is SFI capable and was available with a 4L60E. There is now cheap tuning support for it as well.

[1QUICKHATCH]

Can any OBDII 60* PCMs control a 4L60E? Your best bet for simplicity is probably the 93-95 F-body 3.4 which is SFI capable and was available with a 4L60E. There is now cheap tuning support for it as well.

from what I understand is yes if car the pcm came from had a 4spd auto trans to start with. just have to copy the the trans settings from a obd II 4l60e vehicle and adapt the wiring correctly. If I am unhappy with the performance of the obd II set up I will go megasquirt.