Axtell 107" in the works!
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Tourer
Joined: Sep 2008
Posts: 259
Likes: 1
From: Kansas City, MO
Axtell 107" in the works!
Currently have a nice 95" 100hp 103tq. No longer good enough! Ive talked in depth with my builder several times about going to a 107" and now is the time! Details worked out so far...
Going to rework my already extensively worked heads to include 2" intake valves, they are already milled and 82cc.
Timken conversion, with the axtell 107" kit it'll already raise my compression, Im wanting to stay around 10.5:1 static compression. Gonna reuse my propipe, ignition and mikuni 42 but add the 325 KN filter, builder says itll work just fine.
The only details i need alittle help on are the correct pistons and CAMS.... Im trying to decide between wood 9b, tman 625 and ss 625s. Ive got all the confidence in the world with my builder, as he is the best in kansas city. Im wanting to get this underway with the next week so any advice would be great!!!
Going to rework my already extensively worked heads to include 2" intake valves, they are already milled and 82cc.
Timken conversion, with the axtell 107" kit it'll already raise my compression, Im wanting to stay around 10.5:1 static compression. Gonna reuse my propipe, ignition and mikuni 42 but add the 325 KN filter, builder says itll work just fine.
The only details i need alittle help on are the correct pistons and CAMS.... Im trying to decide between wood 9b, tman 625 and ss 625s. Ive got all the confidence in the world with my builder, as he is the best in kansas city. Im wanting to get this underway with the next week so any advice would be great!!!
Road Warrior
Joined: Nov 2007
Posts: 1,984
Likes: 7
A little bit of apples and oranges here
Tman will give wonderful lower torque and go all the way.
Woods 9b will do much the same but move the kick in about 300-500 RPM up the scale.
I would like the tman 625 over the 9b but I am old and slow.
But my Woods 400 -6 hits below 2000RPM, where I expect the t-Man would and go to redline. Can put around but still lots of bottom end to go with.
The woods 9b is a sure enough Killer Cam and probably give overall Horsepower increase. But you will have to keep the boil on.
A cam that has a LSA, Lobe Separation Angle, in the 100-103 degrees will work on the street real well.
But thats just me guys.
And better give upgraded clutchs a look.
Tman will give wonderful lower torque and go all the way.
Woods 9b will do much the same but move the kick in about 300-500 RPM up the scale.
I would like the tman 625 over the 9b but I am old and slow.
But my Woods 400 -6 hits below 2000RPM, where I expect the t-Man would and go to redline. Can put around but still lots of bottom end to go with.
The woods 9b is a sure enough Killer Cam and probably give overall Horsepower increase. But you will have to keep the boil on.
A cam that has a LSA, Lobe Separation Angle, in the 100-103 degrees will work on the street real well.
But thats just me guys.
And better give upgraded clutchs a look.
Last edited by Old Gunny; Aug 10, 2010 at 01:50 PM.
Road Warrior
Joined: Dec 2006
Posts: 1,530
Likes: 0
From: Diamond Bar, California
i thought the Axtell kit came with pistons??
you may be a bit challenged because 82ccs with a 107 kit will may pretty high compression. Using the Bigboyz heads compression calculator as a referance, with a 82 cc head and a 107 using a 4 inch stroke, flat top pistons, and a .030 head gasket, you would be at 10.78 to 1. at sea level.
for Tman cams you may want to look at the TR 662-1 or -2. The -2 would leave you at about 195 lbs ccp.
I have 82 cc heads as well, and a 107 with 10.5 looked pretty difficult to me.
I could do a 10.3 103 easy with my heads and that was about it.
I have a sneaking suspicion, that if you call Tman about your build he will recommend a Mikuni 45 carb as well.
you may be a bit challenged because 82ccs with a 107 kit will may pretty high compression. Using the Bigboyz heads compression calculator as a referance, with a 82 cc head and a 107 using a 4 inch stroke, flat top pistons, and a .030 head gasket, you would be at 10.78 to 1. at sea level.
for Tman cams you may want to look at the TR 662-1 or -2. The -2 would leave you at about 195 lbs ccp.
I have 82 cc heads as well, and a 107 with 10.5 looked pretty difficult to me.
I could do a 10.3 103 easy with my heads and that was about it.
I have a sneaking suspicion, that if you call Tman about your build he will recommend a Mikuni 45 carb as well.
Last edited by mentor70; Aug 10, 2010 at 02:04 PM.
HDF Community Team
Joined: Jun 2006
Posts: 12,773
Likes: 2,604
From: san antonio
Mentor's comment on the 82cc chamber volume and the resulting CR is a valid one. That set of numbers will put you cranking compression over 200psi which, I believe is the upper end of the range for that cam; IIRC, 190pis-200psi is the sweet spot for the 625. Call TR and get his thoughts before you work the heads; you might be able to pick up a cc or two with headwork. If I were in you shoes, I would start over with a fresh set of heads and sell the ones you have along with the cams. You should be intalling compression releases as well.
I think mentor is right about the carb also.
I think mentor is right about the carb also.
Thread Starter
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Tourer
Joined: Sep 2008
Posts: 259
Likes: 1
From: Kansas City, MO
My builder says the Mik 42 should work pretty well. Maybe not peak hp winner but still perform, we'll see how it tunes on the dyno. As far as cams go im not set on Tmans or Wood. I think this will turn out pretty good with either, just looking for thoughts. Axtell says their flat tops are -3ccs. Producing 10.32:1 add in 82cc heads and .030hg now at 10.62:1. I like a .040hg so that then takes it to 10.42:1, then plus or minus deck. I dont see why the compression is a factor in this...?
My heads are 06 castings he had with his reworking, not 05 with 7mm stems, with new springs 1.9 intake 1.625 exhaust. they are staying but adding 2" intake valves and compression releases.
The cams are really my deciding factor and of course if the pipe or carb dont work ill need to make an adjustment there as well. Im in kansas city and were around 500-750 ft above sea level but i ride all over the midwest.
My heads are 06 castings he had with his reworking, not 05 with 7mm stems, with new springs 1.9 intake 1.625 exhaust. they are staying but adding 2" intake valves and compression releases.
The cams are really my deciding factor and of course if the pipe or carb dont work ill need to make an adjustment there as well. Im in kansas city and were around 500-750 ft above sea level but i ride all over the midwest.
Last edited by matt816; Aug 10, 2010 at 10:45 PM.
Road Warrior
Joined: Nov 2007
Posts: 1,984
Likes: 7
Can always use the Woods 408-6. A little easier on compression. 44 intake closing
I'm running 205# CCR--Have to check again, that was with a Woods 7H cam-- but around that with the Woods 400 and no problem at all.
compressions releases.
Again highly recomment Woods Lifters to keep valve train noise quiet.
I'm running 205# CCR--Have to check again, that was with a Woods 7H cam-- but around that with the Woods 400 and no problem at all.
compressions releases.
Again highly recomment Woods Lifters to keep valve train noise quiet.
HDF Community Team
Joined: Jun 2006
Posts: 12,773
Likes: 2,604
From: san antonio
I dont see why the compression is a factor in this...?
My heads are 06 castings he had with his reworking, not 05 with 7mm stems, with new springs 1.9 intake 1.625 exhaust. they are staying but adding 2" intake valves and compression releases. The cams are really my deciding factor.
My heads are 06 castings he had with his reworking, not 05 with 7mm stems, with new springs 1.9 intake 1.625 exhaust. they are staying but adding 2" intake valves and compression releases. The cams are really my deciding factor.
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Road Warrior
Joined: Dec 2006
Posts: 1,530
Likes: 0
From: Diamond Bar, California
agreed, choose that cam and figure out which head gasket and support you will need to make it work.
I wish i was doing a 107 right now!!
I wish i was doing a 107 right now!!
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Thread Starter
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Tourer
Joined: Sep 2008
Posts: 259
Likes: 1
From: Kansas City, MO
I understand compression, static/dynamic and CCP. It seemed you guys were telling me that i was too high both static and ccp. From what Ive figured up Im neither. Now if you guys were saying that I needed more compression to make either the Tman or wood cams come alive I get that, but at 10.5:1 static with a cam that is 47-56 intake close yeilding around 180-190 ccp, I dont see where there is a problem.
I spoke with axtell and andrews, today both agreed that at my compression Id be in the "sweet spot" for several different cams. I seem to think a cam 48-50 intake closing with LSA between 105-108 and duration between 250-260 would be about perfect for a 107" at 10.5:1.
Looks like andrews makes a few that would fit that as well TW60 and TW67. Another thing that i like about those two is they are .560 and .570 lift, but long duration. Maybe easier on the life of the valve train??
Several of you guys are alot more experienced than me, Im more of a numbers/specs person. Dyno results are not my end all be all, I currently have 99hp 104tq out of a 95". Id like to have 15-20 sq. more but Id also like to ride it whenever and where ever without a concern.
Thanks for all your help with this, I told the builder that were going to order up the parts next week and get this thing going, if I could just pick a damn cam!!
I spoke with axtell and andrews, today both agreed that at my compression Id be in the "sweet spot" for several different cams. I seem to think a cam 48-50 intake closing with LSA between 105-108 and duration between 250-260 would be about perfect for a 107" at 10.5:1.
Looks like andrews makes a few that would fit that as well TW60 and TW67. Another thing that i like about those two is they are .560 and .570 lift, but long duration. Maybe easier on the life of the valve train??
Several of you guys are alot more experienced than me, Im more of a numbers/specs person. Dyno results are not my end all be all, I currently have 99hp 104tq out of a 95". Id like to have 15-20 sq. more but Id also like to ride it whenever and where ever without a concern.
Thanks for all your help with this, I told the builder that were going to order up the parts next week and get this thing going, if I could just pick a damn cam!!