Compression Releases
Seasoned HDF Member
Joined: Dec 2005
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RE: Compression Releases
ORIGINAL: jeepster09
I couldn't agree more! What are you runnig for compression? I am at near 10 1/2 to 1 and don't need them. It's all in the tuning.
ORIGINAL: PhilM
Even though it "might" be possible, I would never attempt it on my own engine.
You gotta drill thru into the cumbustion chamber.... I know drill bits are designed to pull metal out, but what about tapping it? Metal shaving will make their way in... now way, dude!
Heads off.... springs???? [8D]
Even though it "might" be possible, I would never attempt it on my own engine.
You gotta drill thru into the cumbustion chamber.... I know drill bits are designed to pull metal out, but what about tapping it? Metal shaving will make their way in... now way, dude!
Heads off.... springs???? [8D]
I couldn't agree more! What are you runnig for compression? I am at near 10 1/2 to 1 and don't need them. It's all in the tuning.
MUC - If you did do it with the heads on, I would get an air fitting adapter that is the same size as your spark plug hole and blast air into the chamber as you drill. Should minimize the amount of shavings that end up in the cylinder. Someone on HTT recommended that when this came up a month or so ago. Sounded like sound reasoning to me.
Outstanding HDF Member
Joined: May 2006
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From:
RE: Compression Releases
when I did my 88 to 103 I used my 88 stock starter for over a year. Then I started having kick back and hard starts when hot. My cure was to use the 1.4kv starter. One hit of the button and it's off and running.
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Elite HDF Member
Joined: Mar 2006
Posts: 4,722
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From: Biddeford, Maine
RE: Compression Releases
What size is the stock starter?
I have thought about upgrading the starter to a bigger, chrome one..........but wasn't have any troubles until lately when the temps have come up, and really only on hot-restarts.
If the heads come off this winter...........I'm going to do the compression releases and maybe have the heads milled a bit more to get somemore compresion. I'm keeping an eye out for a deal on a pair of heads, I'll send them off to HeadQuarters to be worked on.......then maybe a pair of 575 or 0039 cams.
Steve
I have thought about upgrading the starter to a bigger, chrome one..........but wasn't have any troubles until lately when the temps have come up, and really only on hot-restarts.
If the heads come off this winter...........I'm going to do the compression releases and maybe have the heads milled a bit more to get somemore compresion. I'm keeping an eye out for a deal on a pair of heads, I'll send them off to HeadQuarters to be worked on.......then maybe a pair of 575 or 0039 cams.
Steve
Ultimate HDF Member
Joined: Feb 2006
Posts: 5,939
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From: TX
RE: Compression Releases
ORIGINAL: maineultraclassic
So if the stock is a 1.2kw, does a 1.4kw make that big of a difference?
So if the stock is a 1.2kw, does a 1.4kw make that big of a difference?
On my old RG, that had a very hearty appetite for starter clutches, I tried a CompuFire Gen III "High-Torque" but was very disapoinited to find that it was more of a ratio change than more powerful starter. It did not spin the motor over as fast as the HD starter and I then ended up giong with an EVO style ring/pinion to get it spinning faster. It ultimately ate the starter clutch on the CompuFire too.
For anyone that has changed from the standard starter to the 1.6kv HD unit..... Do they "spin" at the same rate as the stock starter? Does the engine turn over as fast as it did before?
Seasoned HDF Member
Joined: Dec 2005
Posts: 5,450
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RE: Compression Releases
ORIGINAL: maineultraclassic
So if the stock is a 1.2kw, does a 1.4kw make that big of a difference? Or should a 1.6 or larger be used?
Steve
So if the stock is a 1.2kw, does a 1.4kw make that big of a difference? Or should a 1.6 or larger be used?
Steve
Are you still running stock battery cables as well? I've heard some of the aftermarket cables acutally make a difference. I can't imagine you need to upgrade your starter for the compression you are running.
Another way to look at it: The cost of a new starter is going to be the same as a set of compression releases, decking the heads, and getting new springs installed..... might as well throw in a few more bucks for some cams right?
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Joined: Nov 2005
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From: NE Ohio
RE: Compression Releases
ORIGINAL: maineultraclassic
I'm keeping an eye out for a deal on a pair of heads, I'll send them off to HeadQuarters to be worked on.......then maybe a pair of 575 or 0039 cams.
I'm keeping an eye out for a deal on a pair of heads, I'll send them off to HeadQuarters to be worked on.......then maybe a pair of 575 or 0039 cams.
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Elite HDF Member
Joined: Mar 2006
Posts: 4,722
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From: Biddeford, Maine
RE: Compression Releases
ORIGINAL: msocko3
Thats the ticket, go for the full meal deal.
Thats the ticket, go for the full meal deal.
If I'm going to have the heads off to do the compression releases, I might as well spend another couple of hundred and gain some more power.
Steve