I have a carb 350 in a jeep i just bought. What are some good efi kits or mods?

Ive looked at several
edelbrock
howell
affordable fuel injection

Im trying to decide which is the best. Seems the edelbrock kit adds some mighty HP and torque gains.

If anyone is using these kits i'd like to hear some input.

Thanks, im really looking for something really simple, and i really would like something to make some more power.

My main concern is having it so it wont cut out on steep climbs. It kinda sucks!

So the howell kit is a good kit?

Warning: Toyota guy in Jeep forum.

Checkout megasquirt: www.msefi.com

Step one: 1) Buy TBI & fuel pump that fits your junk
2) Buy (or build) megasquirt: $175-$330 (with wiring harness).
3) Tune via laptop.
4) Enjoy.

Not *quite* that easy, but completely tunable.. TBI is a big improvement over a carb for most 4x4s. An 02 sensor will lean you out at cruise and probably improve mileage too...

Warning: Toyota guy in Jeep forum.

Checkout megasquirt: www.msefi.com

Step one: 1) Buy TBI & fuel pump that fits your junk
2) Buy (or build) megasquirt: $175-$330 (with wiring harness).
3) Tune via laptop.
4) Enjoy.

Not *quite* that easy, but completely tunable.. TBI is a big improvement over a carb for most 4x4s. An 02 sensor will lean you out at cruise and probably improve mileage too...


so.. is tbi the general concensus?

i thought tpi was better.. or is it that tbi is good enough?

any hp gains with tbi?

so a good tbi set up will work well offroad..

ok so my next question..
Which one is more reliable?

If you engine is stock, TBI will work fine. It uses a low pressure pump and parts are cheap/reliable. Idle and off idle performance are good but it will fall on its face up high. I don't recommend wasting time to get more power.

TPI is a little more trouble to fit (depending on your front accessory configuration) and may cost more. The parts, computers and head compatibiliy changed over the years, so parts scrounging can be difficult or expensive if you buy a whole kit.

Granite Guru!!! Dude!!!! What a great site!!! Damn there is more than porn on the internet!!!! Gonna do more research and maybe get one of those kits!!!

I am using a stock 89 Chevy 350 light duty pickup motor in my jeep. I bought a stock TBI system on Ebay for $400 and installed it. The wiring harness changes are not a big deal to do. There is information all over the internet. I abought a serial cable $36) and downloaded Winaldl software (free). It comes in handy if you have a laptop. The motor has great throttle response and low end torque. It will idle at 550 rpm all day long. Up to 3500 rpm it works great.

I am using a stock 89 Chevy 350 light duty pickup motor in my jeep. I bought a stock TBI system on Ebay for $400 and installed it. The wiring harness changes are not a big deal to do. There is information all over the internet. I abought a serial cable $36) and downloaded Winaldl software (free). It comes in handy if you have a laptop. The motor has great throttle response and low end torque. It will idle at 550 rpm all day long. Up to 3500 rpm it works great.

what happens after 3500 rpm?

what happens after 3500 rpm?

Above that the power starts to fall off.

yeah so i guess its looking like a tbi conversion for me..

has anyone done this by themselves?

a home made type thing or something and how much does it cost..

I've done a TPI system for my chevy 383. I am completely satisfied with the results. Since this is your first EFI system, I'd recomend a factory TBI system. You can get a complete system from a junkyard or Ebay for cheap. I'd also recomend a wiring harness from painless. They come with great instructions and only include the wires you need. They even make adapters that allow you to bolt the TBI throttle body onto a carb intake manifold. If you have all the parts, you can probaly get the conversion done in a weekend.

Here is a system on Ebay... (http://cgi.ebay.com/ebaymotors/GM-TBI-intake-with-TBI-computer-harness-distributer_W0QQcmdZViewItemQQcategoryZ33553QQitem Z8063553700QQrdZ1)It looks like all you'd need is a fuel pump (~$80-napa) and I'd get a new harness (~$150 ebay)

One more thing...If you are buying a system, get the smaller distributor that has the external coil (that ebay listing has the correct style). The HEI style sometimes interferes with the firewall on jeep engines.

Go here

http://www.binderbulletin.org/forums/forumdisplay.php?f=75

absolutely GREAT site....

A couple things: Move this to newbie. It's good tech, but the newbies would benefit far more than folks here. This has been covered in excrutiating redundancy. Search. Get the red star or use the google engine. Again: this has sooo been covered eleventy-billion times Yes, loads of us have done the TBI install and swap before and have gathered good tech on this. Chek posts in the 2002-2003 time frame

Affordable Fuel Injection has a nice wiring/chip package. (http://www.affordable-fuel-injection.com/) They are a PBB vendor too. Spend time on phone telling them details about your rig, the year, smog requirements, etc. They'll in turn tell you what sensors you need or can lose when switching to TBI and can send you a new EPROM with the correct programming. You'll get a wiring harness for the motor and ECM and a replacement chip. Integrate that to your regular vehicle wiring and you're good to go. And yes, the 15psi pump can be installed in or out of a fuel tank/cell, but you need to have a return line. Also consider a fuel pump kill switch and rollover shut-off.

The do-it-yourself approach is bitchen too, but too time-consuming for me.

Good luck

Edelbrock's claims are horsecrap, and they use a 1985 ECM from the first TPI setup.


What do you have against the Edelbrock setup, out of curiosity?

The Holley truck avenger is a real good carb, I ran tellico with it and had no trouble, just a thought.

TBI is cheaper and will run out of power at about 300 hp.


Not always.

I used to run with some guys in the early 90's- both had CJ7s with full roller 401s. They spent a lot of time flow benching the 2 bbl throttle bodies and with appropriate modifications (read big money) they were able to get both motors to spin 7500 rpm rather nicely for extended periods. I wish I had a way to convert VHS to digital. I have some excellent video of thes guys getting it on in Tellico on a rainy/muddy day.

this is good stuff...

thanks.. i think im gonna do tbi

TPI - any direct port injection is superior to TBI.
However, TBI does it's job and does it well. You won't have typical carb issues.

I run megasquirt with TBI. It's cake.. Especially if you've got a TBI that will already bolt up to your junk.

Affordable fuel injection will use a factory distributor and the howel setup doesnt.

By using the Factory TBI distributor it gives the system more flexablity as far as load and adjusting the timing.

350 is a no brainner really, Adapter, Distributor, Computer, TBI unit and harness.

Nothing to much to it. Buy a harness and have the computer reprogramed.

I've done a TPI system for my chevy 383. I am completely satisfied with the results.

What type of TPI are you running on the 383, speed density or MAF? I want to build a 383 w/ speed density, but don't know if the computer can handle it without some major re-programming.

I'm using the map style (speed density). I did have to re-program the chip to get it to work with my system. If you aren't up to the task of programming, MrWillys (who posted in this thread) sells custom chips.

I'm using the map style (speed density). I did have to re-program the chip to get it to work with my system. If you aren't up to the task of programming, MrWillys (who posted in this thread) sells custom chips.

What EFI system are you using?