Ok guys new idea... EFI need help

[ANDREW]

Ok guy so i need some help im workin on my truck and i get 10 mpg i was looking around and i think i want to swap over to efi what do you guys think its going on a 1983 chevy c20 5.7l 350 the kit that i was lookin at was the EZ EFI http://www.summitracing.com/parts/FST-30227-KIT/
and then just swaping out my intake and clean up the engine a little bit .. is there a better way is this kit hard to install has anyone had experience with this kit.. how long does it take to install.. sorry for all of the questions

thanks so much
Drew

[draggin86]

you could get yourself a 5.3 with tranny and harness for that much my friend that would be a nice motor with aluminum heads and 4 speed tranny cant beat that... right and you get like 22MPG!

[ANDREW]

Yea but thats a whole engine swap alot more work than the kit anyother options

[JNJchev77]

IMO I don't think you will get the results you want out of that kit... Search around on CL, you can find a low mileage LS motor and trans for less that the kit, and this may be a better "long term" option.

I hear those kits are decent, but if you have the time and some help think about doing the swap

[STOCKISH]

I helped a friend install one and he never was happy with it. We then swapped in a 4.8 and 4l60e and he gets about 24MPG on the Hwy.!!!

[78BO]

I was looking at that same kit last night. I don't think you'll get better MPG out of FI. If you do it'd be small and the cost would out weight the gains. The reason I was thinking about it was the performance part of it. For me, it'd be alot easier to tune. I don't know carbs, I know more about FI. And it looks cool. But I got to thinking it'd be a lot cheaper to just buy a FI system off of a older IROC Z. I'm running a 383 with vortec heads so work.

[rfmaster]

Originally Posted by ANDREW

Ok guy so i need some help im workin on my truck and i get 10 mpg i was looking around and i think i want to swap over to efi what do you guys think its going on a 1983 chevy c20 5.7l 350 the kit that i was lookin at was the EZ EFI http://www.summitracing.com/parts/FST-30227-KIT/
and then just swaping out my intake and clean up the engine a little bit .. is there a better way is this kit hard to install has anyone had experience with this kit.. how long does it take to install.. sorry for all of the questions

thanks so much
Drew

Do not waist your money on this kit (if your engine stock or even if you have RV cam) when it can be done for a lot less with OE GM parts.
http://67-72chevytrucks.com/vboard/s...d.php?t=352321

//RF

[ANDREW]

Ok guys the engine swap sounds nice but i dont think it will be practical for me but.. the oe tbi sounds nice anyinfo on tht maybe i should get a new intake and carb ??

[tucsonjwt]

I have owned both 1/2 ton and 3/4 ton Chevy pickups - old and new, straight 6, V6, V8 (350, 454, 4.8, 5.3, etc.). Best gas mileage I got was on the 4.3L V6 - 20 city/23 hwy. in a 2000 1/2 ton long bed.
You have a 3/4 ton pickup, so you are hauling around another 1000 lbs. more than a 1/2 ton - that tends to kill gas mileage, regardless of your engine (unless some diesel setups.)
I assume that you want better gas mileage to reduce cash out of pocket expense. I would do a simple calculation:
Miles driven per year / 10 mpg avg. = gallons per year consumed.
Miles driven per year / ? mpg expected on new set up = gallons consumed.
Difference in gallons consumed X $ per gallon cost = $ saved per year.
My V8 1/2 tons got 17mpg city/21 mpg hwy - best case, driven like grandpa.
Most people I know average 14-15 mpg. overall with their new/newer 4.8 or 5.3 1/2 ton pickups - but they drive "normally".
I think if you do the calculation above you will find it makes no economic sense to try to improve gas mileage with a new fuel injection system or new engine/trans combo. If gas were $25 per gallon - maybe.
I currently have a 83 C20 454 granny 4 speed and I only drive it in the city - I get 10 city/13 hwy.
But each to his or her own. Good luck.

[78BO]

What are your plans? Why do you want to do this? If you have the money and you're building a rod then hell yea go for it.

[ANDREW]

ok guys i like the engine idea but i dont think it is practical right now i do like the sound of the OE efi conversion idk theres alot of ideas up in the air or should i just swap new intake manifold nd carb?

[ANDREW]

i want it to be reliable the carb i have on there now isnt nd it sucks up alot of gas its the 800cfm quadrajet my motors stock but headers and an exhust system i just want to get a little more mpg than 10.. its my daily driver

[78BO]

Originally Posted by ANDREW

i want it to be reliable the carb i have on there now isnt nd it sucks up alot of gas its the 800cfm quadrajet my motors stock but headers and an exhust system i just want to get a little more mpg than 10.. its my daily driver

OMG, pardon me, but that's your problem. That carb is WAY to big for a stock engine. The heads on that thing can possibly flow enough to process that much fuel. You're just dumping gas out the pipe. Save all your money, buy you a nice 600 cfm Edl/Holley carb and upgrade the ignition (hot coil, plugs, wires, cap and rotor). That will cost around 3-400 bucks and you'll think you have a hole new truck.

[Damien]

Originally Posted by 78BO

OMG, pardon me, but that's your problem. That carb is WAY to big for a stock engine. The heads on that thing can possibly flow enough to process that much fuel. You're just dumping gas out the pipe. Save all your money, buy you a nice 600 cfm Edl/Holley carb and upgrade the ignition (hot coil, plugs, wires, cap and rotor). That will cost around 3-400 bucks and you'll think you have a hole new truck.

You know that ALL Quadrajets are capable of flowing about 800 cfm? The same carb is used on a 231 Buick V6 as a Cad. 500. Each carb is tuned for the size of engine it came on and there is a stop that limits how far the throttle blades can open thus limiting airflow. The Qjet from the 231 will not work well on the 500 and vice vesa. Telling him to throw the Qjet in the trash is not good advice in my opinion.
First, you need to make sure the truck is tuned up. Cap, rotor, plugs, wires, fuel and air filters. Most of the time, the coil is fine and does not need to be replaced. Then move on to tuning the carb.
Also, you need to check your gearing. 4.10 gears is not helping the fuel mileage any. If you wanted to switch to fuel injection there is a good thread on here covering TBI swaps.
http://67-72chevytrucks.com/vboard/s...d.php?t=352321

[ANDREW]

Along with that 600cfm carb im going to do a new intake manifold (any recomendations) and i was also thinking my uncle has a set of camel hump heads can i put thoes on too

[78BO]

Originally Posted by ANDREW

Along with that 600cfm carb im going to do a new intake manifold (any recomendations) and i was also thinking my uncle has a set of camel hump heads can i put thoes on too

It depends on what valves they have and how much you want to spend. If it were me I'd have the heads worked first. But if you do that why not a new cam? Buy then that 600 would be too small and you'd need a 750.

So you really need to figure out what you are going to want. These pushrod v8s just aren't going to get good gas mileage if you start making more power. If you have a few grand to throw at it I’d spend some money on a top end kit like this one (http://www.jegs.com/i/Edelbrock/350/...oductId=760264) and I’d keep the 800. You just need to find someone that really knows how to build them. Rochesters aren’t bad, they’re just tricky.

Anyways, like I said you just really need to know what your future plans are for it. If it’s just a work truck daily driver and you want reliability and drivability I’d go with the 600 and ignition system, and save up for a 4 speed and gears.

[deepnsteep]

You could try this engine computer. You would have tons of options for sensors, injectors, throttle bodies, etc....

You can buy them as a kit to assemble or already built.

http://www.msefi.com/index.php

[71swb4x4]

If fuel economy is your main goal swapping in a 700r4 would be your best bet.

[ANDREW]

It has the 700r4

[355bullet]

have u tried this one?....friend of mine converted his jeep to GM TBI..he highly recommends this place
www.affordable-fuel-injection.com

[ANDREW]

ok so i think im just going to stick with a carb its cheaper .. what im thinking of doing is getting a new carb a new intake manifold and my uncle is giving me a set of camel hump heads that will be going to the machine shop for a freshing up and a valve job i think it will be more responsive and it will get a little better mpg instead of that big carb i have now? any tips on what carb and what manifold will thoes heads be good

[tucsonjwt]

Just curious:

i just want to get a little more mpg than 10.. its my daily driver

What mpg are you expecting to achieve? That will determine what you should do.

[ANDREW]

ok i think im going to just do the intake carb and the heads from my uncle there 202 camel hump heads.. i am going to have them sent to the machine shop to get a full valve job

[gchemist]

I can get 15 MPG in the city with my 355 HP motor. A tuned carb makes a difference. However, it's a truck.

Use a dual plane intake. An Edelbrock performer works great on a stock motor. Drop the carb down to less than 650 CFM.

If you are interested in stock GM tbi FI read this article: http://users.sfo.com/~eagle/howell.html

[78BO]

Originally Posted by gchemist

I can get 15 MPG in the city with my 355 HP motor. A tuned carb makes a difference. However, it's a truck.

Use a dual plane intake. An Edelbrock performer works great on a stock motor. Drop the carb down to less than 650 CFM.

If you are interested in stock GM tbi FI read this article: http://users.sfo.com/~eagle/howell.html

But don't you have a 4speed? I thought you had a 700r4? Gears make a big difference.