timebombprod
Forum Sage
My 1100E came to me with a big single K&N filter on the front half of the airbox and the rear half removed. You can see the filter with the side panel removed, below:
Mark
sweet! cant wait until mine is ready and tuned well!
-
Required reading for all forum users!!!
Welcome!
Register to access the full functionality of the GSResources forum. Until you register and activate your account you will not have full forum access, nor will you be able to post or reply to messages.A note to new registrants...
All new forum registrations must be activated via email before you have full access to the forum.A Special Note about Email accounts!
DO NOT SIGN UP USING hotmail, outlook, gmx, sbcglobal, att, bellsouth or email.com. They delete our forum signup emails.A note to old forum members...
I receive numerous requests from people who can no longer log in because their accounts were deleted. As mentioned in the forum FAQ, user accounts are deleted if you haven't logged in for the past 6 months. If you can't log in, then create a new forum account. If you don't get an error message, then check your email account for an activation message. If you get a message stating that the email address is already in use, then your account still exists so follow the instructions in the forum FAQ for resetting your password.Have you forgotten your password or have a new email address? Then read the forum FAQ for details on how to reset it.
Any email requests for "can't log in anymore" problems or "lost my password" problems will be deleted. Read the forum FAQ and follow the instructions there - that's what we have one for...
-
Returning Visitors
If you are a returning visitor who never received your confirmation email, then odds are your email provider is blockinig emails from our server. The only thing that can be done to get around this is you will have to try creating another forum account using an email address from another domain.
If you are a returning visitor to the forum and can't log in using your old forum name and password but used to be able to then chances are your account is deleted. Purges of the databases are done regularly. You will have to create a new forum account and you should be all set.
performance intake mod
- Thread starter timebombprod
- Start date
sweet! cant wait until mine is ready and tuned well!
GSX1100 dreamn
Forum Mentor
Not relevant, as I am running EFI but here is mine.
Used a cut down 1250 Bandit filter.
Used a cut down 1250 Bandit filter.
timebombprod
Forum Sage
What were the performance gains like? Seems like it might run smoother than a aftermarket filter being it was designed for a large inline 4 motor
GSX1100 dreamn
Forum Mentor
No measured performance comparison between running standard verses panel filter.
Mainly did it because i could and I wanted to eliminate any restrictions.
Running EFI mans I do not have to worry about air flow balance e.g. CV carbys.
I am at 1260 cc which is all well and good but it's performance is limited with standard valves/ 36mm throttle body/ standard (degreed) cams/ standard (cleaned up) intake exhaust ports.
it is my commuter/ project bike so outright performance was not a priority.
Mainly did it because i could and I wanted to eliminate any restrictions.
Running EFI mans I do not have to worry about air flow balance e.g. CV carbys.
I am at 1260 cc which is all well and good but it's performance is limited with standard valves/ 36mm throttle body/ standard (degreed) cams/ standard (cleaned up) intake exhaust ports.
it is my commuter/ project bike so outright performance was not a priority.
I would hate to be a glass 1/2 full guy and I wish you all the success with your project but I bet you'll have to sacrifice something in the power band. Idle, mid range, top end.....something wont be just right.
Interesting. I had read somewhere where it was theorized that with C/V and pods, the intake pulse bounces off the the metal endcap of the typical pod and causes similar issues to what you mentioned. Very unscientific, but I removed the pods from my 1150, stuck the rubber trumpets from the original airbox on and went for a ride. It did seem smoother and more responsive, but I didn't get that into detail, plus it was a nice and cool night.
Of the three GS's I've owned, the best and smoothest runner was the 85 1150e with a 4 into 1 exhaust and stock intake with a K&N drop in original type replacement filter. I have been toying with the idea of going back to an airbox, but currently only have the front half on the shelf so this thread has been of interest.
zed1015
Forum Mentor
Yes! That's correct but not just with CV's but any carbs.
The solid caps cause pressure waves that can affect fueling/lean spots at particular rpm's depending on the engine tune and a million other factors.
It's not something you would probably ever notice or cause issues on the road.
The foam UniFilter types with are the ones to use for best results especially for racing.
timebombprod
Forum Sage
Well the good thing is we will get to find out lol, if anything I can just go back to the stock airbox since no hacking has been done and then possibly draw up another gameplan from there.
something that kinda sucks is one of the previous owners (I have a strong feeling it's the one on YouTube) had to cut open the airbox to fit the master cylinder on the bike and there's a hole in it now so I wrapped that area of the airbox in duct tape but I have a feeling it still might not perform aswell as an unmolested one
timebombprod
Forum Sage
getting closer to the rebuild being done and well i think its a better idea to use the stock airbox instead of modifying and tuning an aftermarket intake from a brand new engine, and it came with a question that hopefully actually helps my bike run better, after having an aftermarket exhaust installed my bike would have a really bad low end and also a idle that wasnt that stable, well with the stock pilot jets and turning the mixture screws as much as you can to affect the mixture, it still would have issues in the low end to about 2500 and i would tend to ride the clutch to prevent a rough takeoff, when i would go the next size up on pilots and do the minimum turns out on the pilots it would run too rich and have even less power and foul the plugs, well with me increasing the size of my engine i was wondering if it could possibly be enough increase in air to go up a size on the pilot jets from stock and maybe get a better mix.
Are you open for opinions?? I've not heard of pilots having near that much affect on a bike. I never owned a GS"650", but on other Gs's I've always went up one size on pilots, even with stock exhaust & air box, or with bigger pistons, cams, 4 into 1 exhaust, as the GS's always seemed cold natured, Up one size makes them easier to start in cold weather & slightly quicker to be able to turn choke off. NEVER seen one size up pilots foul any plugs. or affect the running of the bike. If you've lost low end power, adjust your cam timing & make a restrictor for your exhaust. V&H in the past, shipped some of their pipes with restrictors that slid in the collector for exactly that reason... Like said, just my opinion.
timebombprod
Forum Sage
Yes I'm open for opinions lol I couldn't be on here if I wasnt, do you think it could be something else causing the bike to act up? would leaky valves do something like that? My exhaust valves were very built up with carbon behind the valve seat.
Is it a common thing to adjust stock cams timing? Will it affect other parts of the powerband?
I have the stock exhaust and I could run it but the baffles were taken out by the PO so Im not sure if it's gonna be better than the 4:1
Going back to how it would act, with pilot size up it was very slow and bogged until it went to the next set of jets, it was a pretty dramatic difference, and with the stock jets max turns out it would idle well for the most part and rev up well with no load but under load without riding clutch it could act up pretty bad with the bike running and feeling rough and also being choppy, would be worse if I gave the bike more throttle, could die out if I wack it to full throttle. If it sounds like something other than the pilot jets or exhaust are behind this let me know what to check
Is it a common thing to adjust stock cams timing? Will it affect other parts of the powerband?
I have the stock exhaust and I could run it but the baffles were taken out by the PO so Im not sure if it's gonna be better than the 4:1
Going back to how it would act, with pilot size up it was very slow and bogged until it went to the next set of jets, it was a pretty dramatic difference, and with the stock jets max turns out it would idle well for the most part and rev up well with no load but under load without riding clutch it could act up pretty bad with the bike running and feeling rough and also being choppy, would be worse if I gave the bike more throttle, could die out if I wack it to full throttle. If it sounds like something other than the pilot jets or exhaust are behind this let me know what to check
Last edited:
Just a thought, May try lowering the needles a little, they may be too high (rich) & letting in too much gas in just off idle, thus the stumbling & fouled plugs. How much larger than stock are the mains???? With stock air box you should have plenty of vacuum to pull plenty of fuel through a reasonable ( couple of sizes maybe above stock) jets. BIG jets are needed for opener (less vacuum) intakes. I'm not an eng. tuner so beware.
timebombprod
Forum Sage
Mains are stock but I have 110 I can put in there, plugs looked lean last time it ran and it has stock pilots in there right now aswell, I'll have to learn how to check and adjust needle height.
