Turboed 300?

[dburton07]

How hard would it be to turbo a 300 6 cyl in an F150? My friend wants to do it to his and was curious. The motor will be rebuilt with some mods. Thanks guys.

 

[Ozwynn]

start with you need a cam that will alow it to breath.... and allot of head porting..... might be better off with a super charger.....




[EDIT] Or maybe a GM4 Turbo.... they like to spool at lower RPMs as the 94 6.5 defuels at 3400 RPMs and makes its peak torque around 1800 [/EDIT]

 

[Davis]

Do it, anything can be turboed. Putting the turbo on is the easy part. The main issue is engine management. Is it carbed? EFI?

 

[rurouni20xx]

id like to see that. the 300 6 is a tank, if you could get the motor to build more power after the torque peak that thing would be a beast, a turbo would def be the way to do it. ive seen one pulled on a stand and i have to admit the ports are smallish, not sure what the chambers or valves look like, increase of valve diameter prob wouldnt hurt, and a cam that moves the powerband up a hair where the turbo lives wouldnt hurt either. keep in a turbo cam doesnt need alot of overlap (blowby...), stock cams do well because because they reduce this. im sure somebody has done this at one point or another you may be lucky and find a turbo grind from one of the cam companies. tuning is def going to be the issue, thats the entire reason i almost stop most of my projects is lack of tuning resources (dyno...egr...computer setup...)

 

[rusty ol ranger]

Unless you run a turbo for low RPM use, the stock heads are going to be worthless. If you could get the heads, valves, and cam to work togther well to get it to actually use the air your shoving into it, it would be a hellacious machine.

Besides that, you could probley run crazy amounts of boost on one, seeing as how the bottom end on those are about as tough as they come.

later,
Dustin

 

[Davis]

Unless you run a turbo for low RPM use, the stock heads are going to be worthless. If you could get the heads, valves, and cam to work togther well to get it to actually use the air your shoving into it, it would be a hellacious machine.

Just treat the thing like any other engine and size the turbo for your airflow capabilities. I bet a smaller turbo from a cummins (hy35 or he351) would do just fine, possibly something a little smaller.

Also, restrictive heads aren't going to be that big of a problem with a turbo. You keep the same CFM, but double the density of the air, you'll make double the power. It's that simple, and it's just how turbos work.

 

[dburton07]

He wants to do some motor work to it, port polish, cam, pistons ect. I'd like to see him do this, it would be insane. I'll have to let him know about the low rpm turbos too. As far as fuel or carbed, I don't know, it's a 92.

Thanks guys

 

[mn_smokeater]

He wants to do some motor work to it, port polish, cam, pistons ect. I'd like to see him do this, it would be insane. I'll have to let him know about the low rpm turbos too. As far as fuel or carbed, I don't know, it's a 92.

Thanks guys

92 will be FI

 

[Davis]

Any idea if it's Speed Density or MAF?

 

[dburton07]

Any idea if it's Speed Density or MAF?

I'll have to ask him next time I talk to him.

 

[Sevensecondsuv]

It's speed density w/ 14 lb/hr injectors. They actually crank the fuel pressure up to feed that much engine with 14s. I'd recommend running megasquirt. Another bandaid option that might work is a EFI 460 computer. It's speed density with very similar cylinder volume but it runs 24 lb/hr injectors. All Ford truck ECMs from that year range use the pretty much the same pinout on the ecms and it's all bank fire injectors so the computer won't know the difference between a 6 or 8 cylinder.

 

[Davis]

It's speed density w/ 14 lb/hr injectors. They actually crank the fuel pressure up to feed that much engine with 14s. I'd recommend running megasquirt. Another bandaid option that might work is a EFI 460 computer. It's speed density with very similar cylinder volume but it runs 24 lb/hr injectors. All Ford truck ECMs from that year range use the pretty much the same pinout on the ecms and it's all bank fire injectors so the computer won't know the difference between a 6 or 8 cylinder.

Wouldn't that mess up the sparking, since the firing order is completely different?


Obviously megasquirt is the right way to do it, but if he wants to do it really cheap (and wants 50% power gain, or less) I do have a recommendation.

-get some 19 lb/hr injectors
-drop fuel pressure (you can make an adjustable fuel pressure regulator from a CFI fuel pressure regulator for about $5)http://www.turbolx.150m.com/The-fuel-regulator.htm
-add an FMU to add fueling under boost
-drop base timing back a couple degrees

But in all honesty, with as cheap as MS is anymore, why not use it?

 

[dburton07]

This is deffinately some good info to give him, thanks.

 

[Sevensecondsuv]

Computer doesn't care about firing order on these old speed density thing. The TFI module and distributor take care of firing order. The communication between the TFI module and computer is the same IDM, PIP, SPOUT and IGN GRND for all of them.

 

[Ozwynn]

Unless you run a turbo for low RPM use, the stock heads are going to be worthless. If you could get the heads, valves, and cam to work togther well to get it to actually use the air your shoving into it, it would be a hellacious machine.

Besides that, you could probley run crazy amounts of boost on one, seeing as how the bottom end on those are about as tough as they come.

later,
Dustin

GM4 would do it. you can feel mine starts spooling around 1100 and you can really feel it coming on strong around 1600 pushing 12psi..... 15psi around 2400 and 18-20 psi (enough to grenade the bottom end on a 6.5T Detroit) at 3400 ........ you will just have to replace the vacuum operated waste gate actuator with a mechanical one.

Just treat the thing like any other engine and size the turbo for your airflow capabilities. I bet a smaller turbo from a cummins (hy35 or he351) would do just fine, possibly something a little smaller.

Also, restrictive heads aren't going to be that big of a problem with a turbo. You keep the same CFM, but double the density of the air, you'll make double the power. It's that simple, and it's just how turbos work.

an He351 (thats from the 24v cummins right?) would be over kill......... would prolly boost enough to blow the head gaskets.....

Maybe with some ARP head studs, steel composite head gaskets, Main studs and a main girdle....... you might be able to boost a 300 I6 to 30psi.



[EDIT] keep in mind I don't know anything about turbo charging a gas engine but I do know a little about diesels and the 300 I6 has a very similar power curve to a diesel. [/EDIT]

FYI..... there is no difference in the pin out between an SD 300ci I6 computer and a 460ci V8 (respective to year)...... you can interchange the computer in otherwise identical vehicles (ie ..... emission packages)...... you could also use the 460 computer to manage a 400.