controling fuel and spark?

[Anonymous]

Hi, just wondering how are all of you turbo charged guy/gals able to control fuel and spark with having the turbo hooked up?

i have a 93 F250 with a 4.9 I6 and was thinking about turboing it for towing reasons....i do not want a HP machine that sucks gass like no other, just a little extra power to tow while still being able to have OK gass milage when out of boost.

most of the fabbing would be easy for me except should i run the coolant lines right from the water pump or should i get it from the t stat housing?

i see a few of you are using a garret T03 at this oint i dont have any extra laying around but i do have an extra

TEO4H Mitsubishi
Compressor inducer 38 mm
Compressor exducer 53 mm

these turbos are the first to get tak'n off of the 2.2/2.5 engines due to the restriction on those engine..soo im guessing its too small

any info would be great

 

[Anonymous]

I have three of these in various states of degradation. I am planning to trade them in for a T4 for a 250ci aplication.

 

[XFlow_Fairlane]

well that mitsu turbo is nothing like a T3/T4 from garrett

I would think any turbo off a 4cyl might be a little small on a 300. for fuel I am simply running a vac line from the bonnet to the fuel pump reference port.

carb mods include

1. removed choke
2. choke linkage hole filled and vac port for choke capped off (I tapped the existing hole for a #10 screw)
3. solid float
4. milled horn (this is optional but I have access to a mill so why not)

thats it. pretty freaking simple. most of the work is just getting the darn thing mounted on the car.

 

[Anonymous]

well that mitsu turbo is nothing like a T3/T4 from garrett

I would think any turbo off a 4cyl might be a little small on a 300. for fuel I am simply running a vac line from the bonnet to the fuel pump reference port.


thats it. pretty freaking simple. most of the work is just getting the darn thing mounted on the car.

A T03 is ok up to 20 psi, soooo :

so to get the right amount of fuel on a 93 FI set up all i gotta do is simply run a vac line from the bonnet to the fuel pump reference port???

is the stock computer able to handle the fuel change or would i be running rich? would larger injectors be needed? how much boost would the stock engine take with the stock comp and injectores?....and what is pph of the injectores?


thanks!

 

[XFlow_Fairlane]

sorry forgot you were EFI.....you are screwed then...

only simple option will be a 96 MAF computer and harness and do a blow through MAF EFI setup....

on speed density the computer will go nuts if pressures goes over atmospheric.

while the T3 can put out 20psi that is at a lower mass flow rate. pretty much the more air you move the more boost you want to keep it going nicely.

 

[Anonymous]

1 ) A T03 is ok up to 20 psi, soooo :

2 ) so to get the right amount of fuel on a 93 FI set up all i gotta do is simply run a vac line from the bonnet to the fuel pump reference port???

3 ) is the stock computer able to handle the fuel change or would i be running rich?

4) would larger injectors be needed?

5 ) how much boost would the stock engine take with the stock comp and injectores?

6 ) ....and what is pph of the injectores?

1 ) on a little bitty, teensie tiny motor - YES.

On a 300 cube six? About as worthless as titis on boar hog.

2 ) You will need an aftermarket adjustable fuel pressure regulator. It still needs to be hooked to manifold vacuum. It will get boost when the manifold is boosted - think about it......

3 ) If stock computer is speed density, it will work but only to a point.

do a search for " SPEED DENSITY " here:
http://www.turbomustangs.com/forums/search.php?s=

searched:
http://www.turbomustangs.com/forums/sea ... descending

4 ) that depends

5 ) that depends

6 ) you'll have to research that yourself...

sorry forgot you were EFI.....you are screwed then...

1 ) only simple option will be a 96 MAF computer and harness and do a blow through MAF EFI setup....

on speed density the computer will go nuts if pressures goes over atmospheric.

2 ) while the T3 can put out 20psi that is at a lower mass flow rate. pretty much the more air you move the more boost you want to keep it going nicely.

1 ) Other simple solution is to buy a Megasquirt. Do a search.

2 ) the 5.0 V-8 guys use twins from turbo 2.3's, so it stands to reason a 4.9 six cylinder needs twins, too (if using baby turbos)

 

[Anonymous]

I ran one of those little garrets on my 300 for a while, that poor little guy would be spun all the way up by about 2500 rpm. Like Linc says two would be the cat's meow.
Megasquirt works pretty good, but you have to have some aptitude and patience to get it to work well. It is pretty problem free, I've been using it for over a year now without any hiccups.
With 12 pound (stock) injectors you'll probably be getting into 90% duty cycle at around 6 or 8 pounds of boost depending on conditions, position of the moon etc.

 

[Anonymous]

With 12 pound (stock) injectors.

!! DANG !! I thought they would at least be 19's like a stock 5.0.

 

[XFlow_Fairlane]

hehehe the turbo 2.3L motors had peak and hold 30's and 35's from the factory..

 

[Anonymous]

Now if only I could find some around here... I've been using the 24 pound injectors found in the 460's but on a hard suck uphill in the mud or on the highway in 4th with some heavy throttle they are maxing out as well. It's pretty close if I keep the boost down around 15 pounds though.

 

[Anonymous]

would injectors from a turbo dodge work? i got a set of 27 pph and 33 pph injectors from these cars..pretty much any factory turbo related part would be coming from these if i need them.

seems like megasquirtII is the best choice, i just hate electrical! thats why id like any and all info if the turbo'd EFI guys here on their set up.

also what if this sight were to have a guide or a thread so that way whome ever did the swap can share what they did and how they did it,

have one for the EFI and one for the carb'd

 

[MustangSix]

When sizing injectors, a six that makes the same hp as an eigh will need bigger injectors. That's because each cylinder is making more power, hence requireng more fuel.

A good chart is http://www.sdsefi.com/techffhp.htm

in fact, the whole SDS site is full of good info.