DIY Tank raisers - Page 3 - SV650.org

19-12-07, 09:29 PM

I'll take a chance on it and test it with my 'seat of the pants' dyno. If it feels crap, I'll put it back to standard.

19-12-07, 09:52 PM

Let us know how you all get on

I tried something similar on a 400 once. Not raising tank, but taking away the snorkel and a plate that sat below where the snorkel used to 'scavenge' its air ... the inlet was still behind the frame - not in direct airflow, but the increased flow with removed plate fecked the fuelling totally at high speed!! To be fair I hadn't removed the plate myself, it was only when I couldn't get the fuelling right did I look into it further and realise that the plate had been removed ... took me ages to work out why

... but replacing the plate and suddenly it all worked and I was back to 'respectable' size jets ...

BTW I have put a few washers as raisers on my track SV

... but that is like 4-5mm tops

19-12-07, 10:22 PM

I can see a problem with carbs, but have a feeling that FI might be a different story. I'm not too clued up on FI systems, I'll have to ask one of my closest friends - she has a PhD in mechanical engineering gained through her research into hydrogen gas fuelled engines and specialises in automotive FI systems.

yorkie_chris · 19-12-07, 10:24 PM

I might not be that qualified, but it'll boil down to the engine either having a lambda sensor to sense the mixture, or a MAP/MAF sensor to sense the incoming charge and fire the injectors to suit.

19-12-07, 10:39 PM

Whooooosh

yorkie_chris · 19-12-07, 10:46 PM

Is that the sound of an increased charge of air rushing down the pipes... or is it the sound of what I just said going over your head?

19-12-07, 10:48 PM

Quote:

Originally Posted by yorkie_chris

Is that the sound of an increased charge of air rushing down the pipes... or is it the sound of what I just said going over your head?

The latter

northwind · 19-12-07, 10:59 PM

The SV has a MAF sensor, on everything up to the K7 I think that's the only feedback?

yorkie_chris · 19-12-07, 11:02 PM

Are you sure about that

I'm not convinced, thought it was MAP

northwind · 20-12-07, 01:10 AM

Ach, might be. Some sort of air mass sensor anyway.

19-12-07, 09:29 PM	#21
Lozzo Guest Posts: n/a	Re: DIY Tank raisers I'll take a chance on it and test it with my 'seat of the pants' dyno. If it feels crap, I'll put it back to standard.

19-12-07, 09:52 PM	#22
Blue_SV650S Guest Posts: n/a	Re: DIY Tank raisers Let us know how you all get on I tried something similar on a 400 once. Not raising tank, but taking away the snorkel and a plate that sat below where the snorkel used to 'scavenge' its air ... the inlet was still behind the frame - not in direct airflow, but the increased flow with removed plate fecked the fuelling totally at high speed!! To be fair I hadn't removed the plate myself, it was only when I couldn't get the fuelling right did I look into it further and realise that the plate had been removed ... took me ages to work out why ... but replacing the plate and suddenly it all worked and I was back to 'respectable' size jets ... BTW I have put a few washers as raisers on my track SV ... but that is like 4-5mm tops Last edited by Blue_SV650S; 20-12-07 at 09:49 AM.

19-12-07, 10:22 PM	#23
Lozzo Guest Posts: n/a	Re: DIY Tank raisers I can see a problem with carbs, but have a feeling that FI might be a different story. I'm not too clued up on FI systems, I'll have to ask one of my closest friends - she has a PhD in mechanical engineering gained through her research into hydrogen gas fuelled engines and specialises in automotive FI systems.

19-12-07, 10:24 PM	#24
yorkie_chris Noisy Git Mega Poster Join Date: Apr 2007 Location: Halifax/Leeds Posts: 26,645	Re: DIY Tank raisers I might not be that qualified, but it'll boil down to the engine either having a lambda sensor to sense the mixture, or a MAP/MAF sensor to sense the incoming charge and fire the injectors to suit. __________________ Currently Ex Biker Now rebuilding a 63' fishing trawler as a dive boat

19-12-07, 10:39 PM	#25
Lozzo Guest Posts: n/a	Re: DIY Tank raisers Whooooosh

19-12-07, 10:46 PM	#26
yorkie_chris Noisy Git Mega Poster Join Date: Apr 2007 Location: Halifax/Leeds Posts: 26,645	Re: DIY Tank raisers Is that the sound of an increased charge of air rushing down the pipes... or is it the sound of what I just said going over your head? __________________ Currently Ex Biker Now rebuilding a 63' fishing trawler as a dive boat

19-12-07, 10:59 PM	#28
northwind Moderator Mega Poster Join Date: Jan 2004 Location: In the garage where I belong Posts: 17,083	Re: DIY Tank raisers The SV has a MAF sensor, on everything up to the K7 I think that's the only feedback? __________________ "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"

19-12-07, 11:02 PM	#29
yorkie_chris Noisy Git Mega Poster Join Date: Apr 2007 Location: Halifax/Leeds Posts: 26,645	Re: DIY Tank raisers Are you sure about that I'm not convinced, thought it was MAP __________________ Currently Ex Biker Now rebuilding a 63' fishing trawler as a dive boat

20-12-07, 01:10 AM	#30
northwind Moderator Mega Poster Join Date: Jan 2004 Location: In the garage where I belong Posts: 17,083	Re: DIY Tank raisers Ach, might be. Some sort of air mass sensor anyway. __________________ "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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