My 750 turbo build up

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My 750 turbo build up

Postby steady eddie » Mon Oct 28, 2019 1:59 am

Had this 12000 mile bike 23yrs bought as a basket case no front end tank ect ect been stood all that time since owning always took a back seat.now is her time,just took head and barrels off to inspect clean,repaint and rebuild.dont know if the clutch plates are stuck or not so will strip that tomorrow sump is off bottom end still in the frame,is it worth polishing up the piston crowns?? what is a cross drilled oil pan,??does it require an upgraded oil pump,what about oil screen banjo bolt,is it worth replacing it with an inline oil screen ? or left as it is,its late ...
will post pics as i go once i get to grips with doing so..
all the best....
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Re: My 750 turbo build up

Postby Charlie @ Evergreen » Mon Oct 28, 2019 11:54 am

Lot of the information you need is in this link.

Doing the oil pump and relief valve upgrades is worth the time and money to protect your engine with better oil pressure and volume of oil. You can leave the pan alone if you do this upgrade. Do the clutch basket for sure..this has caused many a failed turbo thru the years.
Link will have the information with pics and part numbers your looking for.


viewtopic.php?f=10&t=13810
84' ZX750 Turbo 85'ZX750 Turbo
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Re: My 750 turbo build up

Postby steady eddie » Mon Oct 28, 2019 2:41 pm

[quote="Charlie @ Evergreen"]thank you ,i am all ears,i just wasnt sure on any oil system upgrades that improve a stock bike,and are worthwhile,without deviating too far
i am getting on with the clutch,hence your advice, i also need to get turbocharger cleaned up and reconditioned,may get initial work done here to get it back in the land of the living,then maybe send the turbo to you for some pure tuning
one step at a time,
will let you know how i go,and may/will have some turbocharger questions down the road
All the best....
ps wonderful link thanks
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Re: My 750 turbo build up

Postby steady eddie » Mon Oct 28, 2019 3:38 pm

found out the main benefits of polished pistons{times by 30}are better overall heat transfer ,a reduce in overall temperature by up to 8oC , decrease in piston temp by 16oC, increase in exhaust temp 10oC,hence turbo temp?? , increase in torque up to 3 percent,better bang, benefits the performance and component life compared to none polished ones .
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Re: My 750 turbo build up

Postby georgew4714 » Mon Nov 04, 2019 12:11 pm

Heard alot of mods and upgrades on this forum but can't remember anyone talking about polished pistons , sorry no help from me . Isnt there something about not polishing anything except exhaust runners to help with fuel atomization ? Honestly don't know .

So what is the direction for this project .... rebuilt to stock specs to keep value , all out hot rod with upgraded suspension to fill the need for speed or something in between ? :popcorn
84 750E1 ,zx7 swing arm & rim , Zr7s shock ,dyna coils, k&n , bov , afpr , variable resistor for race mode. Ported spider ,dump pipe , Evergreen billet HT-10 , RTI hydraulic clutch .
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Re: My 750 turbo build up

Postby Kawadoodle » Mon Nov 04, 2019 7:12 pm

I think the piston crowns will still get a coat of carbon irrespective of being polished but might resist it for a little longer.
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Re: My 750 turbo build up

Postby steady eddie » Mon Nov 04, 2019 10:28 pm

[quote="georgew4714" Got my head and barrels off looks good,piston crowns, skirts,rings look ckean ive took pics will uploade them as i go ,going to polish up piston crowns,decoke and flow the exhaust ports and flow the intake ports,esp the entrance where the intake rubbers meet. i have already deviated from the total stock route just by having a different swinger{ gmc} on it which is an actual period of the time upgrade ,the weight difference is quite alot frrom the stock swinger,{ still got original one}. I am going to make my own exhaust up out of a neta system with two shortened rear near open end cans still got kwak y pipe, keeping with period look and keep bottom end grunt. I have got the turbocharger being looked at over here for now ,stage 1,with the hope of sending it to charlie down the road,stage 2.. I was thinking about oil system upgrades relief valve and pump, cross drilled oil pan but dont want to overload oil seals in the turbocharger ect ect .May do relief valve and pump to improve flow but my mind is not set on what the figures are for improvement and what exact parts to use.Was thinking about an Intercooler also but along comes further deviation. This motor wont get wrung for horses or abused.but i will improve things depending on the balance As you know the rule" for every gain there is a loss",i have another bike that i bought as a donor ,havent spun the motor on it yet but have been told it was a running bike,not standard like streefighter style,needs tlc my aim is to also put that back together looking closer to what it should be but maybe non stanard turbo and add some lightness to it.One stock, one not so stock. either to keep??,or just sell as a good project base,like all turbos it must be saved from the scrapyard in the sky.keep you posted
All the best...
Last edited by steady eddie on Tue Nov 05, 2019 3:50 am, edited 11 times in total.
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Re: My 750 turbo build up

Postby steady eddie » Mon Nov 04, 2019 10:36 pm

[quote="Kawadoodle"]the pistons are looking good on a 12000mile motor they look pretty clean as they are to be honest,,so polished crowns should still be looking even better than the stock ones are looking now and show better results by at least the same 12000 miles or 12miles down the road. certain old racers used to re polish them like a mirror after every race ,ceramic coating is an option,certain race events banned you for polishing them!, think it was rallying not sure ,maybe some still do? Im going to polish to crowns up and clean everything,no harm done
will keep you posted as igo
All the best...
Last edited by steady eddie on Mon Nov 04, 2019 10:51 pm, edited 1 time in total.
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Re: My 750 turbo build up

Postby steady eddie » Tue Dec 24, 2019 7:38 pm

[quote="Charlie @ Evergreen
hello Charlie,is it possible you have got the exhaust turbine housing for ht 10 turbocharger,i have managed to get a replacement turbo for one of my bikes which was leaking oil and not looking too good overall,although the impeller did not have play the turbine blades had a few chips which ac turbos the people responsible for loosing a turbocharger of mine reckon they have machined and balanced out even though i offered to buy a billet one,so now i have reconditioned turbo but the turbine housing has suffered the ravages of time and corrosion has eaten away,i have it getting fab work/welded and dressed up with the intention of sending it to you down the road if possible,all the best happy xmas...
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Re: My 750 turbo build up

Postby Charlie @ Evergreen » Wed Dec 25, 2019 11:15 am

Yes have turbine housings both types. One has a smaller waste gate arm pin on arm then the other that is larger. You would need to identify which you have or send a picture if your not sure and I can tell by visual look of a up close picture. Also what is wrong with your turbine housing? Usually the only issue is the flanges are eroded and need to be resurfaced. IF that is all that is wrong that can be done here so there flat and will seal up perfectly.

Please update your profile so we know your location on posts. Thank you
84' ZX750 Turbo 85'ZX750 Turbo
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Re: My 750 turbo build up

Postby steady eddie » Wed Jan 01, 2020 4:42 pm

[quote="Charlie @ Evergreen"]Yes have turbine housings both types. Hello charlie sorry about delayed response here
,ive been up the wall and i never expected such a quick response,{thanks}well the turbo that i got of donor bike was badly corroded,i have that getting welded up at moment i have had new seals fitted here and re balanced compressor wheel,but i am willing to by a new billet compressor wheel,depending on what they offer by way of performance,i know the difference is in the blades ,but i have not looked into it as of yet,i have just got the guy to redeem/honour himself for the loss of my original unit by cleaning it up and new seals and balance,my next step is sending it to you now i dont feel confidence in my entrustment to others
i have pictures on my phone that i could text or send as an email or wait until i get help getting to grips with uploading pictures onto here
my email is dave@rescueteam.com,mobile 07927 228683 any feedback is appreciated
Regards ....
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Re: My 750 turbo build up

Postby steady eddie » Wed Jan 01, 2020 5:03 pm

Hello Charlie thanks for quick response .the housing is badly corroded i am getting it welded up at moment ,turbo has been re sealed and balanced ,but i am willing to buy new billet compressor wheel ,i know there different variations in the blades, i will be sending it to you now though,just need to get housing picked up,thanks for your help so far
Regards dave@rescueteam.com 07927228683
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Re: My 750 turbo build up

Postby Charlie @ Evergreen » Thu Jan 02, 2020 1:37 pm

Sounds good will get it sorted and have you back up in short order. :thumbup
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