57h in a 103 ...having second thoughts
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Road Warrior
Joined: Jun 2015
Posts: 1,325
Likes: 140
From: Edinburgh UK
Anyone that drives has known this since the start and I've been driving/riding all sorts for 35+ years
Tootling around town or some back roads (ok so not technical terms) is not working the engine hard at all and these engines are more than capable of keeping the bike moving on less than 2k, just. the same as a car.
Having said that I appreciate that metrics revving up to 10k or whatever will probably do next to nothing at under 2k
Stellar HDF Member
Joined: May 2009
Posts: 2,066
Likes: 97
From: Northern VA
I thought I'd read that the 57h didn't like compression too high?
edit... ah, found the thread again https://www.hdforums.com/forum/engin...for-a-57h.html it looks as if the consensus is 10:1 is the max to go
edit... ah, found the thread again https://www.hdforums.com/forum/engin...for-a-57h.html it looks as if the consensus is 10:1 is the max to go
Seasoned HDF Member
Joined: Apr 2014
Posts: 5,815
Likes: 2,555
From: UK
The Delphi ECM only has one map slot, so the PV considers whatever is in the memory as fair game - you can just upload it to the PV and then edit on your computer.
By the way - if you do decide on headwork in the future, Alex at Fast Lane Headwork is your man. Then put the heads back on with a 0.030" Cometic MLS gasket to get your compression bump. If you join the HDRCGB (Harley Davidson Riders Club of Great Britain), you even get a 10% discount....
Outstanding HDF Member
Joined: May 2014
Posts: 3,410
Likes: 143
From: Palm Desert,CA
No point being the richest man in the cemetery!
My local tuning guru told me that a 103" with 57s set at 10.0-1 with headwork would make a great street motor.
Last edited by tonebone_79; Mar 4, 2016 at 04:50 AM.
Tourer
Joined: Dec 2012
Posts: 372
Likes: 26
From: Oklahoma
FWIW, I just finished installing the 57H cams in my street glide (103) with a gutted stock header, Jackpot 4" mufflers and A/C. When i put the cams in, I started the bike using the FM Micro Tuner I had been using with the Stage 1 setup. It sounded OK, but didn't run well at all. Burbling, coughing and never really cleaned up until 3500 RPM's or so.
I took it to the dyno guy last week and he tuned it using PV building his own map. It starts easier, sounds much better and pulls harder throughout the curve. And it made 97hp/111 ft lbs after he was done.
I would certainly focus on getting the tune right and like others said, keep the RPM's up above 1700... Lugging these big v-twins isn't a good thing, no matter he cam or setup.
I took it to the dyno guy last week and he tuned it using PV building his own map. It starts easier, sounds much better and pulls harder throughout the curve. And it made 97hp/111 ft lbs after he was done.
I would certainly focus on getting the tune right and like others said, keep the RPM's up above 1700... Lugging these big v-twins isn't a good thing, no matter he cam or setup.
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Thread Starter
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Road Warrior
Joined: Jun 2015
Posts: 1,325
Likes: 140
From: Edinburgh UK
Originally Posted by tonebone_79
103" with 57s set at 10.0-1 with headwork
You are absolutely right ...that's probably THE bit that I'm really missing. Adm recommended Powerglides in the UK, any other recommendations at all?
Cheers All, been some really good advice here, really appreciate it
Gordon
Last edited by Gordon61; Mar 4, 2016 at 08:01 AM. Reason: highlight a user name
Road Warrior
Joined: Aug 2007
Posts: 1,392
Likes: 43
From: South Australia
Keep your revs up a bit more. Even though you read (and can do) pull from x amount of revs in x gear, I find it's still better to down shift, I throw mine back a couple if I'm really going for it even though it has very good torque. Don't be scared to let them rev a bit !!
Last edited by Tat2u; Mar 4, 2016 at 04:04 PM.