Author Topic: ATP Turbocharger for Honda 750 (Read 6708 times)

Cougars750F0 · « **on:** December 18, 2016, 01:55:58 pm »

Hey as some of you already know I picked up most of a vintage ATP Turbocharger kit. I'm missing the header and the tailpipe. Anyhow I'm needing some pictures of one installed on a 750 so I can find out what to look for. Anyone have some pictures to share or can anyone tell me where to look? Thanks in advance for any help

Bill/BentON Racing · « **Reply #1 on:** December 18, 2016, 03:41:56 pm »

Two types of ex, log and spider- 4-1.Pics soon.Here's the spider and one type of outlet pipe.

Cougars750F0 · « **Reply #2 on:** December 18, 2016, 05:34:31 pm »

I think that's the type of header and tailpipe I need. The plenum is a different style. It definitely helps looking at a picture of one. I'll need to take a closer look but it looks like that might be it. Do you have a picture of the other type? And now to just find them. Thanks Bill.

Medyo Bastos · « **Reply #3 on:** December 18, 2016, 06:15:13 pm »

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Cougars750F0 · « **Reply #4 on:** December 18, 2016, 06:21:09 pm »

Thanks Medyo. Definitely the spider type I'm looking for.

TurboD · « **Reply #5 on:** December 19, 2016, 06:37:58 am »

By the looks of what you have, The wrap around pairs up with the ATP spider as you posted. The turbo is from something else and will likely need work to bolt up. The bigger issue will be the turbo, These old draw thru systems require a carbon seal on the impeller shaft to keep vacuum from sucking oil out of the turbo.

BPellerine · « **Reply #6 on:** December 19, 2016, 10:09:36 am »

Quote from: Medyo Bastos on December 18, 2016, 06:15:13 pm

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those headers would make a great high pipe,too bad they come with a turbo.haha bill

754 · « **Reply #7 on:** December 19, 2016, 10:53:26 am »

That last pic is a Magnum Turbo kit.
I got them to sell me just the front header pipe..its what I built my high pipe out of..
Pretty scarce stuff now.. Cavebear...RIP had that setup and maybe a second kit.

Cougars750F0 · « **Reply #8 on:** December 19, 2016, 11:02:22 am »

Thanks to all of your for your help. I'll post a picture of the tag on the turbocharger when I get a chance. I believe it said something like Heavy industries Japan. I sent a text to Mike the seller with a picture of the spider header and he replied that if he finds it he will send it to me. Fingers crossed! The last picture is a great look I'd like to have that in chrome.

Cougars750F0 · « **Reply #9 on:** December 19, 2016, 03:06:35 pm »

I checked and the wrap around pipe does fit the turbocharger. Here's a few pictures of the little bugger.

Cougars750F0 · « **Reply #10 on:** December 19, 2016, 03:07:55 pm »

A couple more. Anyone have or can tell me were to look for information on this unit? I hope it will work for me...

Medyo Bastos · « **Reply #11 on:** December 19, 2016, 07:24:50 pm »

Quote from: 754 on December 19, 2016, 10:53:26 am

That last pic is a Magnum Turbo kit.
I got them to sell me just the front header pipe..its what I built my high pipe out of..
Pretty scarce stuff now.. Cavebear...RIP had that setup and maybe a second kit.

korreck! its one of 3 magnums i know of... as rare as rocking horse poop!

Bill/BentON Racing · « **Reply #12 on:** December 20, 2016, 04:18:49 am »

IHI turbo, RC used them on their turbo setup for 900F, my buddy bought one for his. Little smaller unit maybe than Rajay.

kmb69 · « **Reply #13 on:** December 20, 2016, 08:36:20 am »

Quote from: Bill/BentON Racing on December 20, 2016, 04:18:49 am

IHI turbo, RC used them on their turbo setup for 900F, my buddy bought one for his. Little smaller unit maybe than Rajay.

Should spool up a little quicker than the Rajay, I think.

JacobMm · « **Reply #14 on:** December 20, 2016, 02:39:22 pm »

I noticed that you want to use a draw-through carburetor and a Garrett GT12. That turbo won't have much oil control on the compressor side when exposed to the vacuum created by having a throttle blade upstream. Worse, I don't think there are any drop-in carbon seals available for it.

Cougars750F0 · « **Reply #15 on:** December 21, 2016, 01:34:27 pm »

So am I screwed or can this work? Thought it was a working system.

MRieck · « **Reply #16 on:** December 21, 2016, 06:26:20 pm »

Quote from: JacobMm on December 20, 2016, 02:39:22 pm

I noticed that you want to use a draw-through carburetor and a Garrett GT12. That turbo won't have much oil control on the compressor side when exposed to the vacuum created by having a throttle blade upstream. Worse, I don't think there are any drop-in carbon seals available for it.

See....this is the type of salient, honest talk we need on this forum to survive. We have a great thing going here but this is what we need THOUGH the info is disappointing.
It's just my opinion.

Cougars750F0 · « **Reply #17 on:** December 21, 2016, 06:38:57 pm »

Dang! I was hoping for some good news. Did I just fork out $350.00 for a paper weight?

Medyo Bastos · « **Reply #18 on:** December 21, 2016, 06:52:35 pm »

I don't know to be honest, but I can say it didn't have enough for me to go after it.

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Cougars750F0 · « **Reply #19 on:** December 21, 2016, 07:26:17 pm »

Well... I never had a good December so the good news is that I'm used to bad news! Just thought I might have lucked out for a change. Anyway to salvage the experience?

Medyo Bastos · « **Reply #20 on:** December 21, 2016, 07:59:37 pm »

Yeah, keep your spirits up! The header does show up once in a while, and the tail pipe more frequently. Just wrap it up, put it away and keep looking until you find the rest of the parts. You won't know for sure until it is complete enough to run!

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scottly · « **Reply #21 on:** December 21, 2016, 08:35:08 pm »

Quote from: JacobMm on December 20, 2016, 02:39:22 pm

I noticed that you want to use a draw-through carburetor and a Garrett GT12.

IHI is Garrett?? I thought Garrett turbos were labeled Air Research?

Cougars750F0 · « **Reply #22 on:** December 21, 2016, 09:06:01 pm »

Well... I definitely need to educate myself on the subject of vintage motorcycle turbochargers! Anyone willing to direct me to some reliable information on the types of turbochargers needed for the 750's and what to look for and what to look out for.

Thanks for information it's well needed and very much appreciated!

Bill/BentON Racing · « **Reply #23 on:** December 22, 2016, 12:25:12 pm »

Yes, we all need to learn, B25 Rajay units come up ever so often. I sold one a couple months ago, Bill

Swoop · « **Reply #24 on:** December 23, 2016, 05:24:32 am »

Found this info on the net....don't know if it will help.

You are correct drop in carbon seals are not available - however carbon seal from the Hitachi HT10/12 can be retro fitted, or alternately run a carbon sealed HT10 from a Mazda RX7. I have been looking a bit further into turbo sizing and think the GT12 is a bit too small for what I'm after.
Currently trying to research carbon sealed alternatives - such as the HT10/12, but cannot find any Hitachi compressor maps or specs online, need to do the math before I pull the trigger on anything.
Failing this start to look at going to a push through design similar to this http://forums.sohc4.net/index.php/topic,59262.0.html which uses a Garrett GT2052.

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Author Topic: ATP Turbocharger for Honda 750 (Read 6708 times)