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Lol same exact question at Harley Tech Talk. Immediately sensored. That is always the most censored forum. You can't hardly talk about Harley Tech there. I don't think its a controversial question. I do see where someone might want to take it an ill direction but sheesh. At that point is where the poster has to keep the direction or a mod can step in. This seems lazy on a mods parts and just way over censored.
11-1 static is sufficient for a street cam and safe. More compression by itself is getting to diminishing returns at that point anyway so to 12.0-1 maybe but higher just seems like unnecessary risk to return. I mean it has to be able to run on 91 when it needs to.
Street toy softail. Vtwins make plenty of torque so for better average HP I like the shorter 4.375 stroke to handle rpm to 7k. Not that it would run their everyday. So balanced crank custom rods & pistons. The billet jugs support 4.500 bore for a 139ci. Heads +2.5 valves. More cubes/stroke doesn't make HP it makes more torque and brings it in sooner. Intake, throttle body, pipes to compliment.
A good enough point, but I think what you see from them is basically their packaged commercial/standard offerings, but I'm sure they have the expertise to do the types of builds you're talking about - but it bears asking.
Also, not sure what "streetable compression" is. I've seen compression of up to something like 11.1 with their builds. I could be wrong, but I wonder if you can get to 170HP with compression below that.
I'm at 11:1 with my build. I don't think you can get to 170 HP at 11:1, I've seen 12:1 compression builds in the 160's. 170 is a big number to get to with pump gas and if someone wants to go that big or bigger they should probably be looking at a turbo kit like Trask.
Edit: I've heard A1 Cycles has a very fast M8..... The OP should reach out to them.
I'm a big fan of Fuel Moto. But you don't see them have some of these kind of components or do these kind of builds. No dyno charts of these kinds of builds. They do have a 143" full effort 100 octane race engine. I might inquire with them anyway.
When I took my fxlrs out there in February to get my 128 installed (154hp/150tq) they had a bagger sitting there with 200hp, non turbo. I would say they can go as wild as you want to go or spend.
I'm at 11:1 with my build. I don't think you can get to 170 HP at 11:1, I've seen 12:1 compression builds in the 160's. 170 is a big number to get to with pump gas and if someone wants to go that big or bigger they should probably be looking at a turbo kit like Trask.
Edit: I've heard A1 Cycles has a very fast M8..... The OP should reach out to them.
Yeah, I had them do my build at FM and had level a ported heads, woods 408 cam, SE throttle body with ward ported manifold, trask cleaner and jackpot riot 2-1 for an 11:1 compression build. I also did comp ramp, s&s fuel pump and cam plate, and aim clutch but none of that did anything for hp. That got me 154hp and a really perfect curve. I don't think you can really go much above that at 11:1 compression and pump gas. I think if you want to get into 170hp you are talking turbo or race gas and high compression. Honestly though, I think aft 150hp it is diminishing returns and you start really impacting reliability and streetability. Ive had some long time experienced riders and Harley techs ride my bike and they all come off it grinning and shaking there head, saying its the fastest Harley they have ever been on and it's perfect. At this level, I can't imagine another 20hp really giving me that much more enjoyment on the street and definitely not another 5k worth of enjoyment.
Lol same exact question at Harley Tech Talk. Immediately sensored. That is always the most censored forum. You can't hardly talk about Harley Tech there. I don't think its a controversial question. I do see where someone might want to take it an ill direction but sheesh. At that point is where the poster has to keep the direction or a mod can step in. This seems lazy on a mods parts and just way over censored.
11-1 static is sufficient for a street cam and safe. More compression by itself is getting to diminishing returns at that point anyway so to 12.0-1 maybe but higher just seems like unnecessary risk to return. I mean it has to be able to run on 91 when it needs to.
Street toy softail. Vtwins make plenty of torque so for better average HP I like the shorter 4.375 stroke to handle rpm to 7k. Not that it would run their everyday. So balanced crank custom rods & pistons. The billet jugs support 4.500 bore for a 139ci. Heads +2.5 valves. More cubes/stroke doesn't make HP it makes more torque and brings it in sooner. Intake, throttle body, pipes to compliment.
The M8 engine can handle higher compressions on the street, check FLSTFIDave build and his machine shop, 165/165 @ 12:1. I'm @ around 11.5 for 157/165, my exhaust is holding it back a bit, Tech Tommy has some 12.1 builds in AU for the street. I would not hesitate to go 12:1, just adjust chamber pressures with the correct cam. 170/170 is a good goal, I'd start with a 4-5/8 crank for sure. Wes @ Cycle Rama does big bore and has cams with long duration. The M8 has a lot of potential, many ways to get there.
EDIT: My 157/165 is a 131" with stock SE heads, very easy build.
I'm at 11:1 with my build. I don't think you can get to 170 HP at 11:1, I've seen 12:1 compression builds in the 160's. 170 is a big number to get to with pump gas and if someone wants to go that big or bigger they should probably be looking at a turbo kit like Trask.
Edit: I've heard A1 Cycles has a very fast M8..... The OP should reach out to them.
as long as one is willing and able to pay to play it's all worth it !
Wow, out for a ride today, gas at 2.22 a litre. U are running about the same as us, that would be the first time i can remember, US and Canadian fuel on par. Had a great day, but man its brutal when u have to hit the $200 button to fill two bikes, when the $75 button wont do. Lol, oh well, money well spent.
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Slideshow: The bar-and-shield logo shows up on far more than motorcycles, some of the company's most unexpected products have nothing to do with riding.
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Slideshow: A standard cruiser becomes an intricate metal canvas in the hands of a Swiss custom house known for pushing Harley-Davidson platforms far beyond their factory brief.
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