Dyno Pull #2

After market jet sizes tend to be on the big size a cv jet marked 180 and a dyno jet or aftermarket 180 is. Very much so not the same 70hp and 70 torque ain't bad its nice when hp and torque is the same how high did it pull in mph and rpm ?

Here are the AFR readings from this pull.

Its a little fat if you look a the 13 area you make good power but it not a bad tune at all very stedy torque threw the whole pull that bike is running good if it were a little leaner on the needle it would be a little better on hp but not much maybe a horse or two that a good tune with ethanol at 10 or 15 percent mix that we get now you got a good tune for 60 bucks bud!

It isn't bad...Now it is just time to change the cams out.... Like I said, I will most likely go with the SE .575 cams. I am pretty psyched for that. That won't happen for a little while but most likely our next course of action..

Well worth the $60 then...compression check is a good idea...how many miles on the bike??

Check. Your cranking cylinder psi first beforehand. Then see what that cam calls for min pressures

I have 7k on the build. Ok, I go buy myself a compression tester and go to his place and check the compression. I suppose I can check my SM for values?? But don't they change now that I have higher compression???

I know how they work. I can assure that I have over 8.0:1 compression though.. I get what you mean... Thanks....

Yep that was it and don't forget you state your at 10 . 5:1 your cylinder psi better be over 180 psi. Who did the math to get that 10 .5 .1 ? We need to confirm that john your self how far is the piston above the whole what cc is the head gasket thickness and so on. So cranking psi will tell us something.

The compression ratio is advertised by Harley for 10.5:1 my heads are 55cc, at this point I am assuming that I am using a stock thickness gasket. I am running 10.5:1 Flat top SE pistons gentleman....

Here is the thing, this set up was highly recommended by HRK's peeps in Michigan. They picked this set up.

Understood . Cranking psi will give you some idea of were your at.

Bottom line here you picked up 8hp and 5ftlbs. On a pipe and jet change that's very cool .and a big step forward that you can enjoy . With out going in the motor.

Yep, we both agreed not to change anything until we have our research done. He is going to check into these heads (mine) and get the flow numbers off of them. If he can't find them by research, then off my heads come and then we are going to flow them on his flow bench. I think I am going to Harley and have tell me what the highest lift my heads can withstand before I have to make more modifications. I am guessing that I should be able to withstand at max the .575.. Just a thought.

I like what happened to my bike that is for sure, completely different bike. I will have a lot to look forward to this spring..

According to the HD catalog your heads are decked to provide 10.5:1 and 55cc chambers using stock pistons(in your case the XL 1200 flat top piston kit) You would have to assume it's also with stock head gasket,since there was no mention of a thinner gasket...but you should never assume anything

Thursday I will get to the shop and get it taken care of. MY guy isn't there today so it will have to wait until then. I am close guys.