Race engine

It's only a 750...how fast can it be?
FOURCED
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Re: Race engine

Post by FOURCED »

Looking forward to whatever other details you can share on this beast! :popcorn
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Lorcan
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Re: Race engine

Post by Lorcan »

Custom built turbo by Charlie with a 60mm billet wheel in a small frame compared to my 200+mph GT22 with a 52mm compressor, but in a larger frame. The new one should be good for 300hp, the old one was maxed out at 240-250.
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First to 200mph (2006) and still the fastest (211mph)
Quickest turbo-only 8.69 @ 162mph
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Charlie @ Evergreen
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Re: Race engine

Post by Charlie @ Evergreen »

Maybe full belly pan will fit now give it that turbo look so unique! :banana
84' ZX750 Turbo 85'ZX750 Turbo
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Lorcan
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Re: Race engine

Post by Lorcan »

I saved a bellypan grill specially!
First to 200mph (2006) and still the fastest (211mph)
Quickest turbo-only 8.69 @ 162mph
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Lorcan
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Re: Race engine

Post by Lorcan »

Slotted the bolt holes in the oil drain flange with a die grinder attachment in my dremel and this now fits perfectly. The air filter fits too. Need to sort out a flange for the turbine outlet / dump pipe next.
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First to 200mph (2006) and still the fastest (211mph)
Quickest turbo-only 8.69 @ 162mph
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Lorcan
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Re: Race engine

Post by Lorcan »

Drawn up the flange. Bit weird that the bolt holes aren't concentric with the outside edge, but that's how it is.
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First to 200mph (2006) and still the fastest (211mph)
Quickest turbo-only 8.69 @ 162mph
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Charlie @ Evergreen
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Re: Race engine

Post by Charlie @ Evergreen »

May be due to the T-28s are more in the diesel family of turbos and the T-25 gas changing the flanges for beefier dump pipe setup.
84' ZX750 Turbo 85'ZX750 Turbo
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Lorcan
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Re: Race engine

Post by Lorcan »

Bit of dry building going on here to find out what needs doing. The new turbo from Charlie fits like a glove, but like the GT22 the grill won't be going back on as the turbo too far forward. The headers are going to need to be bolted to a spare head, warmed up and tweaked as they don't quite fit without some strong arm tactics. If you thought the originals were a pain in the ass to fit, you should try these!

Next up will be the design of a new plenum with a single throttle body on the side and injector rail on the back of the plenum and the injectors inside, facing straight down the ports. Just a cardboard model to start with. I think I'll run the boost tube around the side for authenticity, and to keep the weight as low as possible.
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First to 200mph (2006) and still the fastest (211mph)
Quickest turbo-only 8.69 @ 162mph
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Lorcan
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Re: Race engine

Post by Lorcan »

Anyone have the throttle body spacing between centres in mm handy? :baby Looks like 80-100-80mm from searching online. Can anyone confirm?
First to 200mph (2006) and still the fastest (211mph)
Quickest turbo-only 8.69 @ 162mph
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JezZedexE1
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Re: Race engine

Post by JezZedexE1 »

I measured a set and got 75mm - 96mm - 75mm = 246mm :thumbup :popcorn

However, I am not 100% sure this is accurate, so a 2nd opinion will be required. Don't want to get into trouble for getting it wrong. :humour

Attached is the set I measured. The black painted set which is different to the unpainted set. Not sure why? :?
948.JPG
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:victory
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2 x UK ZX-750E1
1 x US ZX-750E2
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Lorcan
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Re: Race engine

Post by Lorcan »

I expect yours are probably more accurate, Jez. The figures I obtained were from a less reputable forum. I don't know what the extra bit is. My first thought was a throttle stop, but it doesn't look like one on closer inspection.
First to 200mph (2006) and still the fastest (211mph)
Quickest turbo-only 8.69 @ 162mph
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Betterthanfabio
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Re: Race engine

Post by Betterthanfabio »

Just to confirm its 75 95 75 right again Jez! :rock
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Betterthanfabio
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Re: Race engine

Post by Betterthanfabio »

The bit circled is definitely a stop that stops you going past full open throttle on the E1. E2 is different it has a little stop that screws onto the bottom rail. I know this because when I fitted the BOV on the front of the plenum & the 1100 TB's the little bracket would touch the BOV & I had to get a tab welded on instead. They are all exactly the same spacing of course TB wise 750 and 1100. :thumbup
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JezZedexE1
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Re: Race engine

Post by JezZedexE1 »

Just to confirm its 75 95 75
95 OR 96? :? :popcorn
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Betterthanfabio
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Re: Race engine

Post by Betterthanfabio »

Bit hard to measure it that accurately. Does it matter much?
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