Author Topic: Hypothetical Caveats of flipping heads around for a Turbo  (Read 299 times)

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Offline thumper 823

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Hypothetical Caveats of flipping heads around for a Turbo
« on: December 12, 2017, 02:03:24 PM »
Hypothetical Turbo Project l- exploring turboing this Road King.
I have been inspired by another thread on here -so here goes.
Ok  the what if(s)
To bolt a turbo on is always messy. It looks like an add-on.
So the maybe options
Could the heads be swapped   (rear to front and front to rear) so both exhaust ports are now together and the turbo bolted up where the air filter was?
I like that idea as it makes the unit more efficient .Plus it be a cleaner looking set up
Or
move the battery and put it under the seat?


What are you turbo experts doing?
Caveats - custom cam, and modifying heads.
Custom exhaust and more.
Lets explore it.
D Troop 3/5, - C/16 ,162AHC, Mekong delta.
Amateur engineering with bad math.

Offline 1FSTRK

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Re: Hypothetical Caveats of flipping heads around for a Turbo
« Reply #1 on: December 12, 2017, 02:39:42 PM »
It would require custom ground cams and recutting the angle in the upper pushrod tube seats, valve pockets in the pistons would need to be custom but all that is doable. I would wonder about the extra heat under the fuel tank, on the rear cylinder, and riders leg.
"Never hang on to a mistake just because you spent time or money making it."

Offline thumper 823

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Re: Hypothetical Caveats of flipping heads around for a Turbo
« Reply #2 on: December 12, 2017, 02:44:03 PM »
Those are the caveats and all very doable.
The turbo could be heat wrapped (and should be anyway) .
I think something would need to be done with the oil draining in the head too.
D Troop 3/5, - C/16 ,162AHC, Mekong delta.
Amateur engineering with bad math.

Offline 1FSTRK

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Re: Hypothetical Caveats of flipping heads around for a Turbo
« Reply #3 on: December 12, 2017, 03:01:29 PM »
Yep, the XR style Evo's used two front heads and the oil drains were not a big problem, couple ways to do it, external was quick and easy. On a turbo you could tie in the drain from that also.

You would would definately be cleaning up the exhaust, what do you picture the intake tract looking like?
"Never hang on to a mistake just because you spent time or money making it."

Offline harley_cruiser

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Re: Hypothetical Caveats of flipping heads around for a Turbo
« Reply #4 on: December 12, 2017, 03:15:03 PM »
And the turbo race is on :up:
What turbo are you looking at? You thinking about fuel injection, what carberation? I think under the seat would be a cool set up, nice and clean, What is under it now, oil tank? not sure how hot it would get I'm sure you could insulate it some how. A couple of years ago I made a custom spring seat and tried to ride it without any padding on it just to try it our. It like to fried my but....... it was so hot, had to stop pick up a cardboard box along the way to make it home. After the pad was on was as cool as any seat that I have.
I like the idea of the reversed heads to collect close together, not sure if it would help except to make the set up cleaner. Then you have the intakes at opposite ends, so not sure how you would plumb that and make them equal length, not even sure if that is important.

Offline thumper 823

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Re: Hypothetical Caveats of flipping heads around for a Turbo
« Reply #5 on: December 12, 2017, 03:24:50 PM »
I only want up to about 5 lbs  boost so I am hoping to stay with a blow through carburation.

BUT-
I am open to all considerations.
Under the seat would be EZ enough.
 Right now I have a fancy small 3-pound battery that could be moved almost anywhere else.
The other scenario is use two rear heads for that application.
D Troop 3/5, - C/16 ,162AHC, Mekong delta.
Amateur engineering with bad math.

Offline 1FSTRK

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Re: Hypothetical Caveats of flipping heads around for a Turbo
« Reply #6 on: December 12, 2017, 03:34:36 PM »
I only want up to about 5 lbs  boost so I am hoping to stay with a blow through carburation.

BUT-
I am open to all considerations.
Under the seat would be EZ enough.
 Right now I have a fancy small 3-pound battery that could be moved almost anywhere else.
The other scenario is use two rear heads for that application.

So air tubes and dual carbs?
Your going to have a long distance between the two intake ports.
"Never hang on to a mistake just because you spent time or money making it."

Offline harley_cruiser

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Re: Hypothetical Caveats of flipping heads around for a Turbo
« Reply #7 on: December 12, 2017, 03:57:27 PM »
I only want up to about 5 lbs  boost so I am hoping to stay with a blow through carburation.

BUT-
I am open to all considerations.
Under the seat would be EZ enough.
 Right now I have a fancy small 3-pound battery that could be moved almost anywhere else.
The other scenario is use two rear heads for that application.

Thinking out loud, mount the carb on the opposite side, run the intake around the heads.

Offline thumper 823

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Re: Hypothetical Caveats of flipping heads around for a Turbo
« Reply #8 on: December 12, 2017, 05:07:27 PM »
I would like all ideas  to keep coming,   so then borg of thought here can reply.
First things get all ideas in plain view then pick one.
The turbo under the seat is the least messy, but it could be disguised as a air filter box
in air filter location if heads were reversed.
that is kind of a trick mod to think about too.
D Troop 3/5, - C/16 ,162AHC, Mekong delta.
Amateur engineering with bad math.

Offline harley_cruiser

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Re: Hypothetical Caveats of flipping heads around for a Turbo
« Reply #9 on: December 12, 2017, 06:13:00 PM »
Well I don't see the advantage of reversing the heads, the exaust would be a problem because of the pushrod tubes and nose cone, not sure how you would run them to save any length to the turbo. And the extra length of the intake, carb set up, not sure how that would work. So what are you thinking on the intake? What size turbo?

Offline thumper 823

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Re: Hypothetical Caveats of flipping heads around for a Turbo
« Reply #10 on: December 12, 2017, 07:22:07 PM »
Well I don't see the advantage of reversing the heads, the exaust would be a problem because of the pushrod tubes and nose cone, not sure how you would run them to save any length to the turbo. And the extra length of the intake, carb set up, not sure how that would work. So what are you thinking on the intake? What size turbo?

Not sure on the size yet,  (turbo) but pretty sure a self-contained variable vain unit would best suit my needs.
I will have to consult with a snail engineer.
Reversing the heads like said would clean up the place rather than  a lot of stuff hanging off looking like crap.
The length of intake runners  is of no consequence as boost should be equal all the way through the IC.
D Troop 3/5, - C/16 ,162AHC, Mekong delta.
Amateur engineering with bad math.

Offline PoorUB

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Re: Hypothetical Caveats of flipping heads around for a Turbo
« Reply #11 on: December 12, 2017, 08:19:08 PM »
What difference will it make? Either the intakes are close together, or the exhaust is? either way there will be a bunch of plumbing.
I am an adult?? When did that happen, and how do I make it stop?!

Offline thumper 823

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Re: Hypothetical Caveats of flipping heads around for a Turbo
« Reply #12 on: December 12, 2017, 08:29:20 PM »
Have you looked at some turbo applications?
True as we know it is the same amount of plumbing is required-
I surely do not want to broach redundancy here, but some are very hard on the eyes.
Like i said earlier- They look like attachments.
With some thought, this can be accomplished better.
Cleaner.
D Troop 3/5, - C/16 ,162AHC, Mekong delta.
Amateur engineering with bad math.