Engine life span and EFI injector size? - Page 2 - SV650.org

07-11-06, 09:36 AM

I have heard of big end failures caused by low oil or excessive wheelies. I have also heard of broken cranks caused by ham fisted (footed) downgearing at the rev limit. I have not seen the cranks myself, so I can't comment on what part broke.

northwind · 07-11-06, 10:33 AM

As well as the oil starvation issues, they sometimes snap near the flywheel... Not common that, but if you're throwing a lot of boost at it it's maybe worth considering. Hardly anyone's turboed SV engines so it's not something you'll find a lot about specifically I think... What sort of power numbers are you reaching for?

07-11-06, 03:30 PM

Quote:

Originally Posted by northwind

As well as the oil starvation issues, they sometimes snap near the flywheel... Not common that, but if you're throwing a lot of boost at it it's maybe worth considering. Hardly anyone's turboed SV engines so it's not something you'll find a lot about specifically I think... What sort of power numbers are you reaching for?

I haven't even committed to going turbo, but I wouldn't bother if I couldn't get at least a 50% power increase. 100% would be preferable, so 135-140hp. Then again, I would like the engine to last a while, so I may just rebuild it and not use forced induction. My MegaSquirt fuel injection computer is tied up on another engine anyway.

07-11-06, 04:31 PM

Hmm, 50% might be doable. 100% would require stronger rods/crank at least, and maybe a better oil pump.

23-11-06, 07:00 AM

As anyone might have expected from my lack of activity,I let the worn-out engine pass by.

I'm still searching for the stock injector flot rate, though........

23-11-06, 10:02 AM

Try giving these guys a call... http://home.factorypro.com/services/...ean_match.html

07-11-06, 10:33 AM	#12
northwind Moderator Mega Poster Join Date: Jan 2004 Location: In the garage where I belong Posts: 17,083	As well as the oil starvation issues, they sometimes snap near the flywheel... Not common that, but if you're throwing a lot of boost at it it's maybe worth considering. Hardly anyone's turboed SV engines so it's not something you'll find a lot about specifically I think... What sort of power numbers are you reaching for? __________________ "We are the angry mob, we read the papers every day We like what we like, we hate what we hate But we're oh so easily swayed"

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07-11-06, 09:36 AM	#11
sdusk Guest Posts: n/a	I have heard of big end failures caused by low oil or excessive wheelies. I have also heard of broken cranks caused by ham fisted (footed) downgearing at the rev limit. I have not seen the cranks myself, so I can't comment on what part broke.

07-11-06, 04:31 PM	#14
sdusk Guest Posts: n/a	Hmm, 50% might be doable. 100% would require stronger rods/crank at least, and maybe a better oil pump.

23-11-06, 07:00 AM	#15
65ShelbYClone Guest Posts: n/a	As anyone might have expected from my lack of activity,I let the worn-out engine pass by. I'm still searching for the stock injector flot rate, though........

23-11-06, 10:02 AM	#16
sdusk Guest Posts: n/a	Try giving these guys a call... http://home.factorypro.com/services/...ean_match.html