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post #1 of 14 (permalink) Old 02-10-2010, 08:29 PM Thread Starter
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Turbo 4.9L I-6

Has anyone put a turbo on a 4.9L I-6 that could tell me what it was like and if it's a good idea or not? I was thinking of eather using the 4.9L with a turbo for off roading, producing more power for towing, or maybe take a small light ranger and use it for a mediocre street rod. Any experience or suggestions will be helpful, thanks.

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post #2 of 14 (permalink) Old 02-11-2010, 12:16 AM
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Re: Turbo 4.9L I-6

personally I think it would be a good idea, get a turbo to spool in the lower rpm range to keep the torque down low. if you plan to run over 5lbs an inter-cooler would be necessary.

but if you don't have the engine already or the truck it would prob just be easier and cheaper to swap a 5.0l in.

not everyone turbos a 4.9l so it would different but if you have money to throw around I say do it. There is alot to setting it up correctly. it would need an aftermarket ecu to run it properly so its going to cost some cash, turbo setups are not cheap.

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post #3 of 14 (permalink) Old 02-12-2010, 02:05 PM Thread Starter
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Re: Turbo 4.9L I-6

[FONT='Times New Roman','serif']Cool. The truck I drive right now is the second truck I have ever owned with the 4.9 in it. It's not much to talk about when it comes to how fast I can go or how good of acceleration it has. I do carry a little favoritism and respect for the 4.9, however because you can almost kick it's a** around the block and it just looks at you and asks "more please," it has a great amount of low-end torque for towing as far as a 6 cylinder goes, and it also runs forever. I figured that one day I would like to see what the potential for the 4.9 could be with some mods. I used to help my Dad out in his shop as a diesel mechanic and I have looked at a million dump trucks and road tractors come in all with huge I-6 engines with turbos on them cranking out monster torque for the work that they do. I can only imagine what a comparatively smaller engine like the 4.9 would produce for torque and HP with a similar set up. I will be certain to do my research and make sure the systems are all set up right with the computer, intercooler, and anything else that I may learn I may need along the way.[/FONT]

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post #4 of 14 (permalink) Old 02-12-2010, 02:41 PM
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Re: Turbo 4.9L I-6

That sounds like a cool idea. I know there some guys out there that run the I6's on the track with good numbers. I always wished ford would use the I6 and build a diesel with it, turbo of course.
Probably use an old ford turbo custom header and some piping. Do some head work and do a look on the web for a custom cam. Keep us informed.

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post #5 of 14 (permalink) Old 07-17-2012, 10:17 AM
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Re: Turbo 4.9L I-6

I have been running a turbo on my f 150 6 from 1982. I run an advance retard distributer and block off the retard. this will give you less advance so you dont ping out the engine under load. I run an eldrebrock water injection unit with 50% alcohol. 15 lb stronger springs on the intake and 10% more surface area on the valves to dispate the heat. I usually run 1oz of acetone per gallon of gas to jump the octane but it will melt any plastic in the fuel system. The carb is a holly 650 spread bore with vacuume secondarys. jets are 90's and it has a bigger metering block. I use a holly red top fuel pump. normaly run 14 psi on the street and 20 at the strip. At 23 to 25 lb boost you will blow the head gasket unless you oring the heads. when I ran at great lakes dragway in 82 it turned 14.52 @ 98 mph in a fullsize 70 f150 with 3 on the tree and 1 leg. this was a 240 cid 1967 van engine with an air reasearch t2 turbine.
I am getting ready to bolt the setup in my 1986 f150 short bed and have changed to the 300 cid t3 turbine studded rockers with needle bearing rollers and double valve springs. I replaced the .538 lift solid lifter crane custom cam with a stock hydraulic cam
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post #6 of 14 (permalink) Old 07-17-2012, 11:46 AM
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Re: Turbo 4.9L I-6

look at my post tons of hp and even more torque
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post #7 of 14 (permalink) Old 07-17-2012, 04:46 PM
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Re: Turbo 4.9L I-6

Interesting, but I'm confused a bit. What turbo did you use with the 240, and what are you going to use with the 300? What rpms are/will you turn? What head mods? It isn't clear and I can't see many clues from the naturally aspirated engine in the pics. You may want to search other old threads about I6 turbo setups here. I have three larger Garrett single turbos that would do well on your 300 (non-gate,IW and VNT/VGT), and two or three used-but-good twin turbo pairs (MHI and 3K/BW) if you're looking for any.

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post #8 of 14 (permalink) Old 07-18-2012, 12:30 AM
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Re: Turbo 4.9L I-6

Big cube 6 should be a great application for a turbo.

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post #9 of 14 (permalink) Old 07-23-2012, 07:52 AM
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Re: Turbo 4.9L I-6

Used a Air Research t2 with the 240 and am using a t3 with the 300. Turn no more than 5000 rpm so it doesn't ping out under load and destroy the engine. Head mods this time are double valve springs studded needle bearing roller rockers.
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post #10 of 14 (permalink) Old 07-23-2012, 10:05 AM
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Re: Turbo 4.9L I-6

Don't worry about keeping it under 5000. The largest AiResearch/Garrett T3 turbo just barely feeds a stock 300 I6 at 3800 rpm. Any higher and it's blowing hot air like a furnace, as it just doesn't have the volumetric capacity (flow). See the compressor map below. At the red dot it's flowing 28 lb/min already, and that assumes zero improvements to flow, which would increase the demand on the turbo. I have no idea how a T2 fed a 240, but I'd be looking to up-size beyond a T3 if you want any more than 3800-4000 rpm out of your 300, or if your engine is modified for better flow - or both.

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post #11 of 14 (permalink) Old 07-23-2012, 02:26 PM
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Re: Turbo 4.9L I-6

You nailed it on the rpm. engine produces best between 1000 to 3500. I don't have much lag due to the short pipe running to the ex turbine. these engines have unbelievable low end torque. Did you notice the et vs mph in my earlier post. as you can see from the homemade intake with preheat chambers parts for custom turbine installs were hard to find in 1982. I am a hacker and go by the motto "run what you brung". I originally built the engine for better fuel mileage using the 650 spread bore but only gained 1 mpg and that is when I tried to go easy. Normally the pedal is to the metal.
is a good rule of thumb for figuring cfm flow for turbines 150 cfm per 100 hp with non injected engines?

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post #12 of 14 (permalink) Old 07-24-2012, 09:07 AM
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Re: Turbo 4.9L I-6

hey PSIG after looking at what is supposed to be a t3 I don't think it is. could you help me identify it? on the aluminum intake side there is a milled spot with SK3695 stamped into it. cast into it is m11 and vw in another spot. the aluminum is bolted to the center with 5 bolts. on the exhaust side cast in the steel housing is B 25 78 and in another spot M3 Y2 it is held to the center with 6 bolts. the center has a threaded oil inlet on top and a 2 bolt flange with a 1/2 inch pipe exiting the bottom.
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post #13 of 14 (permalink) Old 07-24-2012, 12:17 PM
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Re: Turbo 4.9L I-6

You may have a knockoff. M11 is typical for a casting mark on the .60 and Super .60 compressor housings, but they have an I.D. plate riveted to them. The plate info would help a lot. Knockoffs often have only the plate pad with engraving. In any case, there are a gazillion verions with different specs, and a T3 family turbo (usually TAO3/TCO3) can be made for 70 hp or 270 hp. Some good pics would be hlpful in making an I.D.. Some other turbos had M11 and M3 castings, but the Y2 (indicating the turbine housing metal alloy) tends to say it's a Garrett or copy.

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post #14 of 14 (permalink) Old 09-02-2018, 09:47 PM
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Re: Turbo 4.9L I-6

I think I am the one who sold you that engine. did you get it running?
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