I have an 89 f150 300 i6... Its running MFI and i want to put a turbo on it. I dont have enough money for new efi computer so how much boost can i put into it before it leans out? im only looking to make between 5 and 9psi. Will the EEC-IV be able to handle that much boost or will i have to hold off and but a standalone EFI computer for it?

 

There's a lot of info about tuning the stock efi system with boost here: The National Lightning Owners Club Inc

An aftermarket system would be the best option, but not the cheapest for sure. I installed Holley HP on my Lightning and couldn't be happier with it.

Also a good place for general turbo info: https://www.theturboforums.com/forums/

 

Stick with proven builds. If you can't find one to copy there are probably a lot of good (read expensive, time consuming, disappointing) reasons.

Hint: look up the world land speed record for the class in which that engine would compete. Find that build or something like that.

https://fordsix.com/viewtopic.php?t=74249

https://forums.vwvortex.com/showthre...n-truck-engine

http://www.aussiespeedshop.com/produ...rd-6-cylinder/

 

Alright... thanks guys... if you wanna loan me some money and a guy to come wire a new holley efi system into my truck that would be great

 

If you're stuck using stock parts, the only way to make this work is to switch to MAF by getting the engine harness and computer from a '96 with a six cylinder (preferably 5-speed). The Mass AirFlow setup will handle low boost without reprogramming, and will make switching to a standalone (or Tweecer, QuarterHorse) easier to tune than speed-density. Getting a 5-speed computer/harness will prevent problems when the computer cannot sense the electronically controlled transmission - even if your '89 has an automatic, they weren't computer controlled. You should probably grab a set of 5.0 fuel injectors while you're at the salvage yard. They're a little bigger and you'll run a tad rich off boost, but the stock six cylinder injectors are barely enough for a factory motor.

If you simply turbo a stock '89 the computer will go nuts as it's parameters expect a strict set of operating conditions because of the speed-density fueling. Likely, the truck would revert to limp-mode as soon as the MAP sensor saw more than atmospheric pressure. It would run like dog**** and not be able to cope.

If you switch to MAF and turbo it, the next thing to do will be to find an adjustable fuel pressure regulator setup. You'll be able to tune a bit more boost that way.

 

There's a lot wrong with that post.

 

I don't understand what you're talking about... I know my injectors are crappy... but why spend that much money on a new harness and computer for a 96? At that rate I might as well buy a Holley dominator or something like that... and how would I hook up a maf sensor if I already have a map sensor?

 

I stared at your post for a while trying to figure out what I should say. It's obvious you aren't following me, so anything I add will probably be a waste of time. Nevertheless:

The 1996 trucks switched to Mass AirFlow from speed-density. So, instead of the fueling algorithm using load and engine speed to calculate intake airflow, it actually measures intake airflow. MAF trucks can be mildly modded without reprogramming because the MAF sensor can compensate for changes in volumetric efficiency, while speed-density trucks cannot.

A '96 wiring harness is wired for a MAF already, you'll just have to adapt or swap the incompatible '89 sensors for the '96 stuff - maybe the TB too. There are writeups on this forum. But, 5 - 9 pounds is too much without a rising-rate fuel pressure regulator - and nobody makes one for a 300 fuel rail. And c'mon - a junkyard harness, sensors, EEC is going to cost as much as a Dominator EFI? That Holley unit is like two grand, and you could get a new harness and injectors for around $100.

But, you're just making excuses, aren't you? You're not going to turbo your truck. You're not going to swap a 300 six into a Bronco II like you mentioned in your other thread. You just like to pretend.

There are a bunch of threads on this forum about turboing the 300 - all talk. I put a Megasquirt II on my '93 300 5-speed with the intent to turbo it, but never did because turboing the 300 isn't worth the effort. Don't kid yourself. If you want to go fast, buy a V8 truck. If you want to tow, buy a big block. If you want to tow a lot, buy a diesel. Sure, the 300 is a fantastic engine - my favorite - but it is anemic and a ****load cheaper to get power out of a V8.

Idealism is nothing but a wasteland of sloth and decay - don't get trapped into thinking that your situation will never change. If I were to dole out any real advice, it would be to concentrate on hot-rodding your life while just enjoying your truck in stock form. Sometimes doing the best you can with what you've got is making yourself wait and learning how to recognize a trap disguised as an opportunity. This truck is going to be a trap with your extreme lack of cash and knowledge; simply self-medicating for nothing worthwhile to work towards. Work on yourself instead - in twenty years this truck will be long-gone, but you wont be. / End sermon.

 

But, you're just making excuses, aren't you? No need to be so rude about it, you may not have meant to come across rude but you did. In twenty years this truck will be long-gone. I actually intend to keep this old POS as long as the frame is in 1 piece, im hoping to get a newer truck and put this one back on blocks and work the 300 over and race it till it explodes. I only paid $600 for this truck and i am willing to spend a little over 2 grand on it to make it the way i want it. I am going to turbo this truck, it may not be this month or this year but it will happen. I have the turbo already... i just need someone to help me with the exhaust side of the turbo and the intake and im ready to go... all i needed from you was more specifics on what you meant. i dont follow vague instructions. SO, if you would like to be as specific as possible with this then by all means help me out. I dont know what im doing on most of the electrical on this truck. Im mechanically inclined, and gaming computer savvy. Ive never dealt with old crappy computers on cars or put a turbo on anything and this truck will be trial and error till i get it right. IF you can send me some links to places where i may not look for an engine control harness and computer for a 96 ford 300 with a manual transmission then please do. Im sorry if i come across rude during this but my day has been hell working on this truck and im about to open another thread for this new issue.

 

That's good stuff there.

Zach, $$ can be saved,and skills /knowledge learned. Just takes time.

 

I know that, but i also need help from you guys finding these websites or locations around houston texas to go pick a parting