engine mods?
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engine mods?
looking for advice, i am thinking of changing cams. I belive i'll go with andrews TW37B grind cams in. Also whille i have everything apart i am thinking of changing the pistons to keith black 9.2:1 flat tops. Any advice? Oh i have a FLSTSCI.
Cruiser
Joined: Jun 2005
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RE: engine mods?
I upgraded my cams to the S & S 510 gear driven cams last year. The cams are okay, but I think the Andrews cams would be a better option for low end torque.
If you are going to have your engine apart, why not go to a 95" big bore? I recently purchased this big bore kit:
http://cgi.ebay.com/ebaymotors/Harle...temZ4636528117
If you are going to have your engine apart, why not go to a 95" big bore? I recently purchased this big bore kit:
http://cgi.ebay.com/ebaymotors/Harle...temZ4636528117
Ultimate HDF Member
Joined: Feb 2006
Posts: 5,939
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From: TX
RE: engine mods?
Joker....
I am building mine this weekend (hopefully) with 37G's. I also sent a set of heads & jugs to BigBoyz for bore, port/polish/mill. I had all the machine work done for just over $500. That includes bore cylinders, port & polish heads, and mill the heads such that the assembled compression ratio will be 9.7:1 using cometic gaskets.
Bean, at BigBoyz, was most helpful in assisting me with my configuration selection. I have used TW26A's and TW55G's on two other builds. Both rocked, but this one should be more of a best of both worlds, as I am not going w/Hi-compression and should still have good rideable power.
Regarding pistons.... the S/E cast flat-tops are great pistons. They are cheap, durable, and have the teflon coating on the skirts that really helps reduce noise from skirt slap on the cylinder walls....
Give Bean a holler... you'll be glad ya did.
Let us know what you decide to do.
I am building mine this weekend (hopefully) with 37G's. I also sent a set of heads & jugs to BigBoyz for bore, port/polish/mill. I had all the machine work done for just over $500. That includes bore cylinders, port & polish heads, and mill the heads such that the assembled compression ratio will be 9.7:1 using cometic gaskets.
Bean, at BigBoyz, was most helpful in assisting me with my configuration selection. I have used TW26A's and TW55G's on two other builds. Both rocked, but this one should be more of a best of both worlds, as I am not going w/Hi-compression and should still have good rideable power.
Regarding pistons.... the S/E cast flat-tops are great pistons. They are cheap, durable, and have the teflon coating on the skirts that really helps reduce noise from skirt slap on the cylinder walls....
Give Bean a holler... you'll be glad ya did.
Let us know what you decide to do.
Cruiser
Joined: May 2005
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RE: engine mods?
PhilM, Any specifics on why you didn't go with the hi compression. On my '88 FLHS 80" with the mikuni cam and S&S carb, I've been told that if I'm looking for a little extra kick that high compression pistons is the way to go and is better money spent for bang for the buck than porting and polishing. Thanks
Ultimate HDF Member
Joined: Feb 2006
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From: TX
RE: engine mods?
Travisd -
What you've been told is 100% true.... BUT .....
The added compression makes life tuff on starter clutches. I know compression are "supposed to help"... but after replacing the starter clutch serveral times on my last bike and having the problem start when I'm on the road somewhere.... I'm not going there again!
If I can get satisfactory performance w/o risking starter problems.... that's what I'm after.
Again - there are many opinions and everyone has their own, but that's mine.
What you've been told is 100% true.... BUT .....
The added compression makes life tuff on starter clutches. I know compression are "supposed to help"... but after replacing the starter clutch serveral times on my last bike and having the problem start when I'm on the road somewhere.... I'm not going there again!
If I can get satisfactory performance w/o risking starter problems.... that's what I'm after.
Again - there are many opinions and everyone has their own, but that's mine.
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