SLORYDER

If you would not have ignorantly skipped over the link I posted you would see that their upper bodies "appear" to be the same size.

Well there you go. You just proved your own self wrong. You CAN'T train your truck to get better mileage at 100mph. Just like you CAN'T train a 280lb man to go full blast for 2-3 minutes straight. There has to be a compromise. Anyone that size woulda gassed.

Good pipe and respond well to mods. I had 'em on a 521cc powervalve cheetah and they did fine, maybe a little choked up top but that would be expected of a large engine with a small bore pipe.

Yeah from what i gather the staggered design works well. Are you planning on doing the worm holes?

I agree that Brock will be hard to beat.

My 2008 Mugen SI

True that. My guess is stuck powervalves

I'm sure his torque curve is as flat as a table.

If you lost all your fat how much do you think you'd weigh?

So now you're in better shape than carwin. LOL

I'm going to go ahead and say that the .001" feeler may be close to accurate in this application. .004 or so and there will be a noticeable amount of loss of feel due to the curve of the bore. If you truly believe it is .001 and the piston spec is .004, I'd hone it out to .004". Better loose than tight. And if you have any doubts get a machine shop to check it.

When was the last time you saw a 275lb'er fight at that pace and not gas?

I would definately not recommend reshaping the head yourself unless you do this for a living. I can tell you that you will gain a few ponies by shaving .020" -.025" off the mating surface, and still run pump gas. Mill .030" to run 50/50 pump fuel and race fuel and more hp as well. Or you can get even better results shipping your head to Mull engineering and having them rechamber it. his handle on here is blowit.

Let me clear this up. I do not know if he has a cardio problem. I agree that he ran out of gas. If you drive your truck yhe speed limit and don't dog it lets say you get 15mpg. Now lets say i have the same truck but go 100mph everywhere i go, and i only get 6mpg. Would you say your truck inherently gets better mileage? I'm just trying to be logical. If carwin and lesnar fought at the same pace and carwin was shot at the end of the 1st and lesnar was not, I'd say carwin had poorer cardio. There is not enough evidence to say that however. Geez

Assuming you have stock base gaskets that are approx. .025" thick, and your deck has not been milled: Raise the transfers 1mm for a duration of 119-121 and a distance from deck of 43mm Raise the exhaust 1.5mm for a duration of 189-191 and a distance of 28.5mm from deck Widen the exhaust port to 45mm chord assuming 64mm bore. 70% of bore would be a good safe number as long as you don't square up the port too bad. The best way to do this is with a degree wheel. Google printable degree wheel. I would recommend 120/ 188 for a mild port, or 120/ 190 and have you mill .020"-.025" off the head to make up for the loss in power stroke. I would actually recommend shaving the head regardless, and go with the 188 for more bottom end and 190 for more rev-out. I would also recommend raising the intake port roofs to 70mm from deck and lowering them by 2-3mm, and give the bottom of the window a very gererous radius. Narrow the bridge to 5mm. I would also recommend drilling the auxilliary intakes as well. Best way to do this is by drilling 3 small holes on top of each othervertically and tying them in with your porting tools; there is not a lot of lateral area to play with without going through the side of the case. A lot of builders add these ports; surely it must be backed up with a dyno..

275lb guys with normal sized lungs. Doubt it

You you honestly think Carwins trainers totally neglected to train him for a 5 round fight??? If he would have paced himself, he wouldn't have gassed. You jump on top of someone and try to flatten their skull with every ounce of your energy for 3 or 4 minutes straight. That's like a 3 or 4 minute sprint. Then imagine if you were Carwins size. ANYONE would gas fighting at that pace at that size. I don't think it was his cardio that was lacking. I think it was his presence of mind to tell him to slow it down.

That fight with cabbage was epic though! I've never seen someone get hit in the face that many times in a fight.

Banshees are likely different than what you are accustomed to.

Here I fixed my previous post You will be very pleased with the pipes and gearing change. Don't forget to re-jet.

Carwin and lesnar have the exact same sized upper bdy, same sized arms; Carwins lower body is considerably bigger. I believe Carwin wears two glove sizes bigger than Lesnar. Lesnar looks bigger because his neck is thicker You can see their similar size here http://116.ufc.com/

I think his cardio is fine.. When you weigh 265 all muscle and you exert yourself in the way carwin did you are just gonna gas yourself out bottom line. Your lungs can only absorb so much oxygen and when you are that big it takes up alot. As said before, he should've let Lesnar get up and started teeing off again while he was still dazed. Fricking guy has a killer instinct like no other though, which was his double edged sword.

I assume you run pump fuel from your reply. Stock timing as well? You need to buy a compression gauge to check the compression. I suggest milling the head (assuming stock head) to run race fuel- shaving approx. .035" to leave .035" or more squish. This will help you pull taller gearing without bogging off the line. I would also highly recommend adding an adjustable timing plate and advancing your ignition timing. I'm not too keen on cub timing on race fuel. If you take off your flywheel cover and look behind the flywheel you should see elongated bolt holes on the timing plate and incremental lines for measuring the rotation of the plate. Google timing plate banshee. But yes, you will benifit greatly from running taller gearing-acceleration wise. To do this you need more compression and timing because with the cub engine you have very little bottom end to begin with. And yes, the cub engines like a "high rev" pipe. If you put a midrange pipe on them the port will still be open after the pipe returns its supercharging pulse, and the pressure will bleed back out the port at higher rpm's. Soooooo Shave stock head .035" after verifying .070" or more squish, or if your squish is less than .070" cut enough to end up with .035" squish. Or you could mill .030" and run 50/50 race fuel/ premium. Increase timing advance Gear up to 16t front CPI pipes

Yeah, check the torque on your base and head nuts and you should be good as far as break-in. You need to gear up. I'd go to a 16t front sprocket and see how you like that. You could get 10-15 hp more out of some CPI pipes. The combination you have is bad. Pipes come on too soon for the engine and sign off too soon as well. Where are you at as far as compresion/ timing/ rider weight?

Lean condition is my guess. Like AK sais, look for signs of an air leak on that side. Intake boots, carb came out of the boot ect.