Delcoed 750cc Motorbike Engine

Converting To Delco ECU From Carby Or Other Injection Systems
Post Reply
User avatar
Jayme
Posts: 2585
Joined: Sun Mar 01, 2009 8:59 am
Location: North Coast, NSW

Delcoed 750cc Motorbike Engine

Post by Jayme »

Just got a hold of my latest project. I am going to attempt to Delco a 750CC twin cylinder four stroke motorcycle engine. the engine in quesiton will then be insterted into a go kart frame (The Edge mini sprint) and lots of fun will ensue. I have no idea what kind of engine it is. if any one can identify it that would be great. I cant find an engine number anywhere (I havent looked at the sump yet that thing is just too heavy for me :shock: )
My plan is to use a camira Memcal and $12P in four cylinder mode, being only a 2 cylinder, the ecu will only see half the revs the engine is really doing but I can adjust my definitions for that. also if my theory is correct, the four cylinder is expecting 90 degrees between ignition pulses so the engine will see double the timing advance that the ecu commands. again, I can just adjust my definitions to suit.
for the throttle body, again, camira parts, ill make a manifold 2 into one and have a camira throttle body and IAC valve mounted there. the injectors will be as close to the head as possible pointing in the general direction of the valve.
DSCN1473.JPG
DSCN1473.JPG (190.88 KiB) Viewed 12598 times
RHS with crank trigger and CDI visible
DSCN1477.JPG
DSCN1477.JPG (110.4 KiB) Viewed 12598 times
Front with starter motor visible

DSCN1480.JPG
DSCN1480.JPG (159.92 KiB) Viewed 12598 times
LHS with alternator visible and blank name badge where it was torn off :(

DSCN1481.JPG
DSCN1481.JPG (198.55 KiB) Viewed 12598 times
Back side (yes that is a pair of old socks hanging out the carby)

DSCN1476.JPG
DSCN1476.JPG (140.68 KiB) Viewed 12598 times
just in case I cant figure out what its for. youd have to be hercules to kick start this baby, im not even going to try, I dont need a broken leg
DSCN1479.JPG
DSCN1479.JPG (186.97 KiB) Viewed 12598 times
Starter motor and Engine size label
DSCN1474.JPG
DSCN1474.JPG (1.94 MiB) Viewed 12598 times
crank trigger. now I hope this is a reluctor, it looks like one to me, so my plan is to hook it up to a camira ignition module and use the coil that it already has as it is 12v anyways.

so there it is :D I do hope I havent forgotten anything HUGE that will be a show stopper but that is half the point of getting this thread out there. what does everyone think?
Last edited by Jayme on Fri Jan 15, 2010 8:13 am, edited 3 times in total.
User avatar
Holden202T
Posts: 10311
Joined: Sat Feb 28, 2009 9:05 pm
Location: Tenambit, NSW
Contact:

Re: Delcoed 750cc Motorbike Engine

Post by Holden202T »

this is a very cool project, i'm looking forward to seeing how well it works!
User avatar
delcowizzid
Posts: 5493
Joined: Sat Feb 28, 2009 8:38 pm
Location: Wellington NZ
Contact:

Re: Delcoed 750cc Motorbike Engine

Post by delcowizzid »

looks like suzuki 750 special :punk: thats my guess anyway
If Its Got Gas Or Ass Count Me In.if it cant be fixed with a hammer you have an electrical problem
User avatar
VL400
Posts: 4991
Joined: Sun Mar 01, 2009 2:54 pm
cars: VL Calais and Toyota Landcruiser. Plus some toys :)
Location: Perth, WA
Contact:

Re: Delcoed 750cc Motorbike Engine

Post by VL400 »

This takes the cake as the most out there EFI conversion I have seen on here! I have seen a harley converted to a delco, was on the kalmaker page, so it must be possible - and they are odd firing engines too.

Might have to add two cyl mode to $12P for you :P

How many pulses per rev from the crank trigger??
User avatar
Jayme
Posts: 2585
Joined: Sun Mar 01, 2009 8:59 am
Location: North Coast, NSW

Re: Delcoed 750cc Motorbike Engine

Post by Jayme »

from what I can tell, both pistons go up and down together but are on opposite strokes, the crank trigger pulses once per crank revolution and fires spark on both cyllinders at once when both are at tdc (one at top of compresison stoke other at end of exh stroke) just like a v6 wasted spark .
I was comtemplating trying to hook up an oscilloscope to the trigger to make sure it does the whole zero volt crossing stuff.

proper 2cyl support would be just awesome :D you might also have suspected where im going with this he he. once im happy with injeciton there is nothing stopping me adding a little charade turbo to the mix.
User avatar
Holden202T
Posts: 10311
Joined: Sat Feb 28, 2009 9:05 pm
Location: Tenambit, NSW
Contact:

Re: Delcoed 750cc Motorbike Engine

Post by Holden202T »

Kawasaki KZ750 is my guess .... can't find the right year model though
User avatar
Jayme
Posts: 2585
Joined: Sun Mar 01, 2009 8:59 am
Location: North Coast, NSW

Re: Delcoed 750cc Motorbike Engine

Post by Jayme »

good work Holden202 :D and thanks for these links for kz750 info..

Image

Image
User avatar
Holden202T
Posts: 10311
Joined: Sat Feb 28, 2009 9:05 pm
Location: Tenambit, NSW
Contact:

Re: Delcoed 750cc Motorbike Engine

Post by Holden202T »

bit of inspiration and also everyone should see this video atleast once in their life :punk:

http://www.youtube.com/watch?v=BWUcZXAHQ8I
Agroeureka
Posts: 8
Joined: Tue Jul 07, 2009 7:04 pm
cars: 1935 Buick
Wm Caprice
Purvis Eureka

Re: Delcoed 750cc Motorbike Engine

Post by Agroeureka »

Hi

I have one of these motors in a honda odyssey i thinks your going to have fun.
I found this motor to be a to touque monster.
In a kart traction will be fun

Good luck

Andrew
User avatar
Six_Shooter
Posts: 163
Joined: Wed Aug 05, 2009 2:06 pm
cars: 2005 Dodge Dakota - For Sale
2000 GMC Yukon - The Daily driver
1985 GMC Jimmy S-15 - Under reconstruction
1973 Datsun 240Z - Toy, uses GM EFI.

Re: Delcoed 750cc Motorbike Engine

Post by Six_Shooter »

Looks a lot like my Honda CB650 engine, just missing two cylinders. LOL

I plan to eventually, after I get my licence and such, Delco my 1984 Honda Interceptor 500. I didn't plan on using ECM controlled timing, but may be able to adapt something like the above diagrams to it. :)

I just have to figure out a laptop mount for the bike.......

LOL
2005 Dodge Dakota - The daily
1985 GMC Jimmy - A work in progress
1973 Datsun 240Z - The Toy, turbocharged and injected using GM EFI, and code59

If you're not living on the edge, you're taking up too much space.
Post Reply