Considering a cam swap
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6th Gear
Joined: Dec 2021
Posts: 13
Likes: 1
From: USA
Considering a cam swap
I have a 94 fxr with ev27, ultima ignition, wiseco 10:1, thunderheader and hsr42. My bike runs great, but I have issues with hot starts and some pinging. I understand what a cam does and how, but my knowledge of them is pretty basic. I understand the ev27 isn’t so great with higher compression.
Is there a cam that would better fit what I have? I’ve been considering a woods w6. Would that be worth the swap or too similar? I typically ride solo and like to go fast. The ev27 fits my riding pretty well, but I’m willing to make changes.
Is there a cam that would better fit what I have? I’ve been considering a woods w6. Would that be worth the swap or too similar? I typically ride solo and like to go fast. The ev27 fits my riding pretty well, but I’m willing to make changes.
Road Warrior
Joined: Apr 2016
Posts: 1,528
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From: Long Island
I’ve got an ev13 in mine with similar setup which has nice pull right from idle.I use premium gas and the Ultima (recently swapped to a Dynatek) was set at #3 curve. Didn’t have a pinging problem.Did you static time it by way of the instructions?
Seasoned HDF Member
Joined: Oct 2015
Posts: 13,403
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From: Pine Flat Dam/South Bay Area, CA
A 1.4KW starter will take care of the hard starts or you can have compression releases installed in the cylinder heads.
Seasoned HDF Member
Joined: Mar 2010
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From: Poolville
One way to help the hard start is just by going to a longer duration cam with an earlier n later intake close.. it makes a huge difference..
Last edited by 98hotrodfatboy; Apr 23, 2022 at 12:49 PM.
Thread Starter
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6th Gear
Joined: Dec 2021
Posts: 13
Likes: 1
From: USA
I’ll have to get back to you on ccp. My heads are stock. Everything was rebuilt about 10k miles ago, but it’s all stock.
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Seasoned HDF Member
Joined: Mar 2010
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From: Poolville
The crane H296 is a very good bolt in and won't be too soft under 3k because your static comp if it is indeed indeed 10:1..
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Seasoned HDF Member
Joined: Mar 2010
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From: Poolville
Also test your VOES switch for the pinging issue..
One more thing, the Ultima ignitions curves are very fast ramping you might be better off with a Dynatek 2ki ignition..
Last edited by 98hotrodfatboy; Apr 24, 2022 at 07:10 AM.
HDF Community Team
Joined: Dec 2005
Posts: 5,374
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From: NC USA
When you say hard starting, do you mean difficult for the starter to turn it over, or turns over too long before starting? (or both) Hows the fuel mileage and did you install the Mikuni or someone else?
The 2nd questions may sound irrelevant, but I have some ideas that are or may be. But need to know those 2 answers.
** make that 3 questions. When does it spark knock (ping)? Under hard acceleration or on mild acceleration?
Last edited by t150vej; Apr 24, 2022 at 10:00 AM. Reason: one more question