You can over do it with any engine, I've had a 45 for several years now and I think it's great. will the 48 be over the limit? I don't know, and haven't heard of anyone here on the forum who has tried it..but you can be the first.........

I think the 48 may be a bit of an overkill without engine mods. This engine will only be able to suck so much air and fuel in it's stock state. I think the 45 is pushing the upper limits on a stock engine. I saw a guy with two 42's on his chopper the other day and the way he was set up her ran on one carb but when he punched it the second carb kicked in. The bike sounded like a fuel dragster when he pulled in so he had some really bad azz cams in it. I am just waiting to get a dyno run on my 45's to see what my AF,HP, and TQ are.

Cool, thanks guys. I just saw the tiny difference in cost and thought it might be worth while to bump it up a notch. Ill stick with the 45 since that is the most my engine can use at this point but i like that it can accommodate some added demand if i can do something serious in the future.

Thanks guys,
Mike

Anyone get the complete kit from PR with there special Air Filter. I like how it has the broad side to the wind but it looks like it would sit out wide and pretty low... you know like right where my knee is probably going to want to be. Just wondering if anyone has tried it.

I was going to go with the BAK since it doesnt cause all the lean running issues a forward facing stack would (I looked at them originally they are SO cool looking) but still allows in plenty of air should the carb need it. I noticed some of you have used marine filters but i have zero machining abilities or equipment so if i cant do it with a dremel it is not going to happen.

I do currently have the Maxair intake oblong bubble thing. Im assuming i can stretch it over the 42 and it seems like it allows air just as much access to the carb as the BAK and such.

Oh, im going with the 42. I would love to be 45 brothers with flashback but since this is my first project i am going to stick with the wealth of information, being the 42 so that is the size of intake i will be looking for.

Also it seems that most of you run without a fuel pump, in which case it seems like these would be good to get to supply the carb. Will it be enough?


This Stuff from Maxair instead of Fuelpump

High Flow Fuel Inlet: 30.00
http://www.maxairengineering.com/mm5/merchant.mvc?Screen=PROD&Store_Code=ME&Product_Code=HSR_HI_FLOW_INLET&Category_Code=ROADSTAR

Pingle Fuel filter: 36.00
http://www.maxairengineering.com/mm5/merchant.mvc?Screen=PROD&Store_Code=ME&Product_Code=PINGLE_FUEL_FILTER&Category_Code=ROADSTAR

Pingle High Flow Petcock: 115.00
http://www.maxairengineering.com/mm5/merchant.mvc?Screen=PROD&Store_Code=ME&Product_Code=RS_PINGLE&Category_Code=ROADSTAR


Which all comes in this kit for a bit less money plus the kit has handy clamps and such:
http://www.maxairengineering.com/mm5/merchant.mvc?Screen=PROD&Store_Code=ME&Product_Code=NO_PUMP_MOD&Category_Code=



*edited to fix links, they should work now*

Guess what the 40mm CV carb, the 42 HSR carb, and the 45 HSR carb ALL have the same size spigot that goes in to the manifold. They also have the same grove around the spigot as the OEM carb so they all fit the OEM manifold just fine. My 42 was from another bike so it had a metal adapter on the spigot I didn't bother taking it off and it worked just fine. As for have to have tooling to make a K&N filter work you only need a hack saw and drill and some files. You cut a piece of 1/8" thick x 1" wide flat aluminum stock and drill the holes for mounting in it and your done. That is what is on my bike now. K&N RA-077V and they are only $40 from where I get them.

VegasMike wrote:
Anyone get the complete kit from PR with there special Air Filter. I like how it has the broad side to the wind but it looks like it would sit out wide and pretty low... you know like right where my knee is probably going to want to be. Just wondering if anyone has tried it.

I was going to go with the BAK since it doesnt cause all the lean running issues a forward facing stack would (I looked at them originally they are SO cool looking) but still allows in plenty of air should the carb need it. I noticed some of you have used marine filters but i have zero machining abilities or equipment so if i cant do it with a dremel it is not going to happen.

I do currently have the Maxair intake oblong bubble thing. Im assuming i can stretch it over the 42 and it seems like it allows air just as much access to the carb as the BAK and such.

Oh, im going with the 42. I would love to be 45 brothers with flashback but since this is my first project i am going to stick with the wealth of information, being the 42 so that is the size of intake i will be looking for.

Also it seems that most of you run without a fuel pump, in which case it seems like these would be good to get to supply the carb. Will it be enough?


This Stuff from Maxair instead of Fuelpump

High Flow Fuel Inlet: 30.00
http://www.maxairengineering.com/mm5/merchant.mvc?Screen=PROD&Store_Code=ME&Product_Code=HSR_HI_FLOW_INLET&Category_Code=ROADSTAR

Pingle Fuel filter: 36.00
http://www.maxairengineering.com/mm5/merchant.mvc?Screen=PROD&Store_Code=ME&Product_Code=PINGLE_FUEL_FILTER&Category_Code=ROADSTAR

Pingle High Flow Petcock: 115.00
http://www.maxairengineering.com/mm5/merchant.mvc?Screen=PROD&Store_Code=ME&Product_Code=RS_PINGLE&Category_Code=ROADSTAR


Which all comes in this kit for a bit less money plus the kit has handy clamps and such:
http://www.maxairengineering.com/mm5/merchant.mvc?Screen=PROD&Store_Code=ME&Product_Code=NO_PUMP_MOD&Category_Code=



*edited to fix links, they should work now*

Save your money, you don't need the high flow fuel inlet, you can run without a fuel filter as well, and the stock petcock flows more than enough. Been running this carb for close to 4yrs, played with jetting to many times to count, done numerous EGA's as well. And the 42 works just fine with stage 2 mods, you're not going to get more tq out of a bigger carb, that's all tied to what cams you run, as far as hp, until I see numbers of wot HP, I can't say yay nor nay. sure you can say that low and mid-range feels quicker on acceleration 42 to 45, but thats not the bottom line between the 2, wot hp is. I can adjust my 42 to feel a seat of the pants difference in mid-range acceleration, been there and done that, and had the AFR numbers to show why. it's all in the tune.

Erbman I disagree about the high flow petcock. With the 42 on my 07 when I hit 1/8 fuel left it start starving for fuel. I put a Pingle high flow on and haven't had a problem yet even at near WOT.

Cool, so maybe a petcock if i run into issues, other than that just a nice fuel line huh? Is stock ID sufficient? I assumed since the new jetting would suck more fuel i would have to compensate by supplying it with more fuel and without the pump i figured i would need some ginormous lines and petcock etc.

Thanks for the scoop

Mike

Heh, im sort of already having this conversation in a different thread but ill put it here too. As for manifolds... i've been looking at the maxair ported. I have to admit im not very engine savvy but it seems like i get a manifold that fits the bike/engine and then get a flange that fits the carb (i've found some at Patrick racing) being 42 which im sold on at this point ( again im new to the carb thing and i like the larger knowledge base that is available on the 42s )

Everyone is talking about nemesis but it doesnt seem like i can get one? are they by special order or something? There website doesnt exist right now and the only one i can find for sale is on ebay and i have no idea if 200 is a good price.

I am running 3/8 fuel line in mine, 5/16 or 3/8 will do the job well I also am running the Pingle high flow filter but you can run a cheap auto filter as well if it feed a V8 it will feed the V-Twin. As for he manifolds I am running one of my own ported manifold and the carb fits perfect. All you need to do is port your OEM manifold according to the tech article. If fits the carbs perfect and I have had no problem with air leaks like the Nemesis does. As for the other manifolds all they are is the OEM manifolds that are ported but they don't take them down to the metal they just round the corners I surface the flanges and remove the nibs for oversize o-rings. The cost of the other manifold far exceeds what they are worth compared to porting you own like I and others do.

Curt wrote:
Erbman I disagree about the high flow petcock. With the 42 on my 07 when I hit 1/8 fuel left it start starving for fuel. I put a Pingle high flow on and haven't had a problem yet even at near WOT.

Are you running pumpless now?......