Superturbocharged 300 Inline 6
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Joined: Mar 2015
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From: Central, WI
Superturbocharged 300 Inline 6
Since this engine has 3 out of the 4 prerequisites (meth coming after install) I thought this would also be a good place to show a nice combo of power adders.
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More Turbo
Joined: Mar 2015
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Likes: 20
From: Central, WI
The M122 has a nice large integral bypass that should keep it cool during cruising and the Gt45 ebay turbos are quite effecient...some 70* cooler compared to a china t4 turbo doing the same work.
The supercharger boost will be what it's going to be and never turned up....that's what the turbo is there for, to share the load and increase boost/power without extreme temps. That being said I believe the temps going into the cylinders will be 200-250*f on 15 psi and above before methanol injection, should be well under 200*f when the meth is on.
This engine will run on E85 which has proven itself in a Kenne Bell 302 supercharger build I have done where I started pulling additional timing at 250*f and has seen close to 300*f going into the cylinders. Pulling ignition timing for safety hurt power more than high iat's. I added a small bypass to help keep the KB cooler and will likely add another.
Another E85 twin turbo build was data logging 244*f going into the cylinders during a run. Turned on the meth and did pick up some power with no other changes. Haven't logged since adding the meth, but never hurt anything at 244*f so should be safer. Will definitely log more in the spring and fine tune.
The supercharger boost will be what it's going to be and never turned up....that's what the turbo is there for, to share the load and increase boost/power without extreme temps. That being said I believe the temps going into the cylinders will be 200-250*f on 15 psi and above before methanol injection, should be well under 200*f when the meth is on.
This engine will run on E85 which has proven itself in a Kenne Bell 302 supercharger build I have done where I started pulling additional timing at 250*f and has seen close to 300*f going into the cylinders. Pulling ignition timing for safety hurt power more than high iat's. I added a small bypass to help keep the KB cooler and will likely add another.
Another E85 twin turbo build was data logging 244*f going into the cylinders during a run. Turned on the meth and did pick up some power with no other changes. Haven't logged since adding the meth, but never hurt anything at 244*f so should be safer. Will definitely log more in the spring and fine tune.
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That's neat. What are the structural limitations of the 300 blocks? Does it start to crack cylinders or does the main webbing break out of the block? Are all the blocks basically the same or are there some that are better than others for this sort of thing? What do you use for a damper at the front of the crank?
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More Turbo
Joined: Mar 2015
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From: Central, WI
Strength of the block and where it's stressed is a loaded question, depends on the application and the tune. For my builds which are forced induction with low timing and e85, doesn't seem like I can hurt anything even when goin lean and all have at some point. I have seen a cracked cylinder in a turbo 300 but the guy was on gas and likely had a questionable injector.
I have ran 4 camshafts, 3 turbos, 3 different fuels, and as much as 22psi breaking up lean on stock 300's and can't seem to hurt anything. And that 22 psi was with stock head bolts and that engine had 1000 out of 1100 miles being pounded on...that's all it was, a test mule save for 1 car cruise and even then it was in boost every chance I could get.
So I don't know about hurting parts. For what I do, I'm not sure I can hurt anything with the limits of the stock 300 head architecture. I think the n.a. guys like FTF and others that have pushed these engines to the limit with high timing and high rpm would be more knowledgeable. Maybe they will chime in.
The Superturbocharged 300 uses a new stock efi 6 rib balancer with integrated pulley.
I have ran 4 camshafts, 3 turbos, 3 different fuels, and as much as 22psi breaking up lean on stock 300's and can't seem to hurt anything. And that 22 psi was with stock head bolts and that engine had 1000 out of 1100 miles being pounded on...that's all it was, a test mule save for 1 car cruise and even then it was in boost every chance I could get.
So I don't know about hurting parts. For what I do, I'm not sure I can hurt anything with the limits of the stock 300 head architecture. I think the n.a. guys like FTF and others that have pushed these engines to the limit with high timing and high rpm would be more knowledgeable. Maybe they will chime in.
The Superturbocharged 300 uses a new stock efi 6 rib balancer with integrated pulley.
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More Turbo
Joined: Mar 2015
Posts: 733
Likes: 20
From: Central, WI
...I guess it could have been high cylinder pressure from making good power in the turbo 300 that cracked the cylinder...it did have forged pistons so I would guess the head gasket would let go first if lean on gas...or maybe just a thin spot in that cylinder by chance...I believe it was standard bore.
I have heard the cylinders are thin, all of the 300's I have boosted including this one have been standard bore.
I have heard the cylinders are thin, all of the 300's I have boosted including this one have been standard bore.
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TheDudeAbides
Ford Inline Six, 200, 250, 4.9L / 300
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Jul 29, 2022 01:26 PM