95 Build Question
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Intermediate
Joined: Jun 2016
Posts: 35
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From: Seattle WA
95 Build Question
Have a question about compression with my 95 building a 2000 electraglide
Heres my build specs:
95 SE flat tops
96 heads,
andrews 37 cams
I am going to have the heads worked a little and decked for compression with an 030 hg.
I’m wondering what is a good target compression to hit with these on a 95 build. I’ve seen everything up to 10.2. I’m thinking about getting my heads decked to about 81cc’s to target about 9.8. Thoughts? Concerns I should have? Input would be much appreciated.
Heres my build specs:
95 SE flat tops
96 heads,
andrews 37 cams
I am going to have the heads worked a little and decked for compression with an 030 hg.
I’m wondering what is a good target compression to hit with these on a 95 build. I’ve seen everything up to 10.2. I’m thinking about getting my heads decked to about 81cc’s to target about 9.8. Thoughts? Concerns I should have? Input would be much appreciated.
Thread Starter
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Intermediate
Joined: Jun 2016
Posts: 35
Likes: 1
From: Seattle WA
Max- I have a module already. Thank you!
I already have the cams..... but interesting idea.
HDF Community Team
Joined: Jun 2006
Posts: 12,774
Likes: 2,606
From: san antonio
Have a question about compression with my 95 building a 2000 electraglide
Heres my build specs:
95 SE flat tops
96 heads,
andrews 37 cams
I am going to have the heads worked a little and decked for compression with an 030 hg. I’m wondering what is a good target compression to hit with these on a 95 build. I’ve seen everything up to 10.2. I’m thinking about getting my heads decked to about 81cc’s to target about 9.8. Thoughts? Concerns I should have? Input would be much appreciated.
Heres my build specs:
95 SE flat tops
96 heads,
andrews 37 cams
I am going to have the heads worked a little and decked for compression with an 030 hg. I’m wondering what is a good target compression to hit with these on a 95 build. I’ve seen everything up to 10.2. I’m thinking about getting my heads decked to about 81cc’s to target about 9.8. Thoughts? Concerns I should have? Input would be much appreciated.
Thread Starter
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Intermediate
Joined: Jun 2016
Posts: 35
Likes: 1
From: Seattle WA
If the "worked a little" heads don't include larger intake/exhaust valves and port work, no need for cams with higher lift than the 37s. I would not set static CR below 9.8 and would consider 10:1. Measure deck height and, if you haven't done so, include that in you compression calculations or have the cylinders machined for zero deck. If larger valves are part of the head work, open up the intake valve reliefs in the piston to accommodate the larger diameter valve. Assume the motor is carbed so a programmable ignition will be important to the tune to avoid detonation. I would get it on a dyno ASAP and tune.
I am going machine it for zero deck height. Running this setup on a couple of different calls (big boyz and hammer) milling the heads to 79cc should get me to 9.95-10:1The cylinders are currently at the machine shop getting bored out. I’m hoping I can get those picked up tonight so I can get the deck height measured this weekend. Once I get my heads finished I’m going to start with the head setup.... measuring piston to valve clearance etc. I’m not going with larger ports and valves I’m trying to keep this as steetable as possibly as I ride everywhere. Yes the bike is carb’d it’s got a mikuni 42 on it.
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Joined: Dec 2007
Posts: 12,084
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Just sent a 98"/37/our Stage II Heads, back to Ohio, yesterday.
10.0 cr, V&H exhaust, ported t/body.
Tuned with Techno Research.
106 hp/112 ft/lbs, sae.
109/115, std.
Scott
10.0 cr, V&H exhaust, ported t/body.
Tuned with Techno Research.
106 hp/112 ft/lbs, sae.
109/115, std.
Scott
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HDF Community Team
Joined: Jun 2006
Posts: 12,774
Likes: 2,606
From: san antonio
I am going machine it for zero deck height. Running this setup on a couple of different calls (big boyz and hammer) milling the heads to 79cc should get me to 9.95-10:1The cylinders are currently at the machine shop getting bored out. I’m hoping I can get those picked up tonight so I can get the deck height measured this weekend. Once I get my heads finished I’m going to start with the head setup.... measuring piston to valve clearance etc. I’m not going with larger ports and valves I’m trying to keep this as steetable as possibly as I ride everywhere. Yes the bike is carb’d it’s got a mikuni 42 on it.
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From: poway
Each to his own but larger intake and exhaust valves have no impact on "streetable" habits of these vtwins. Your call but it makes no sense to me to install stock heads back on a performance motor; the heads on Harley vtwin are where the major power gains can be realized. If you are OK with 10:1 compression as "streetable" and it is, you shouldn't be concerned that larger valves will negatively impact streetability.
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