Author Topic: Shovel Decompressor  (Read 379 times)

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Offline remington007

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Shovel Decompressor
« on: November 28, 2017, 12:49:24 PM »
Anyone installed decompressors in this fashion? It looks like on my heads there is not much meat in the area above the second fin. Does it take a special unit verses the ones used on Twin Cams?
Thanks.

Online hotrodshovel

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Re: Shovel Decompressor
« Reply #1 on: November 28, 2017, 01:02:12 PM »
Mine installed in the same location on both heads but they do not stick out so far.  Function perfectly. I don't know how they are seated in TC's
John

Offline Scott P

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Re: Shovel Decompressor
« Reply #2 on: November 29, 2017, 04:08:14 AM »
Good spot is between the pushrod covers.
Otto Knowbetter sez, "steer clear of chameleons."

Offline remington007

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Re: Shovel Decompressor
« Reply #3 on: November 29, 2017, 09:47:04 AM »
Looking at my stock 82 heads there appears to be very little material in either spot to put in even the short .360 length decompressors. I am nervous about ruining a set of heads.

Online hotrodshovel

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Re: Shovel Decompressor
« Reply #4 on: November 29, 2017, 10:49:23 AM »
 prodrag1320 , Kirby Vee-Twin Racing did mine and I'm sure he will guide you with particulars and answer all your questions.
John

Offline 72fl

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Re: Shovel Decompressor
« Reply #5 on: November 30, 2017, 06:03:09 AM »
Here's how mine are done as Scott said. Mine are on 99 Hot Rod Sporty, work great get a little warm but they work as suppose to.

Offline a_disalvo

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Re: Shovel Decompressor
« Reply #6 on: November 30, 2017, 06:34:40 AM »
Wonder if you can install them if you have dual plug heads? Frank

Offline Hossamania

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Re: Shovel Decompressor
« Reply #7 on: November 30, 2017, 07:35:31 AM »
Here's how mine are done as Scott said. Mine are on 99 Hot Rod Sporty, work great get a little warm but they work as suppose to.

Those are some finger burners there.
Happiness does not buy money.

Online hotrodshovel

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Re: Shovel Decompressor
« Reply #8 on: November 30, 2017, 05:50:54 PM »
disalvo,  I'm dual plugged and no problems  (Sorry, but you are not allowed to access the gallery)
John

Offline 72fl

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Re: Shovel Decompressor
« Reply #9 on: December 01, 2017, 05:36:51 AM »
Here's how mine are done as Scott said. Mine are on 99 Hot Rod Sporty, work great get a little warm but they work as suppose to.

Those are some finger burners there.

Hoss you need to see the Callous on my index finger :hyst:

Offline ghostrider

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Re: Shovel Decompressor
« Reply #10 on: December 01, 2017, 06:58:19 AM »
Heres a few pics of where I put mine, dual plugged heads too.








Offline wfolarry

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Re: Shovel Decompressor
« Reply #11 on: December 02, 2017, 06:30:10 AM »
Nice job. Long reach or short releases?

Offline ghostrider

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Re: Shovel Decompressor
« Reply #12 on: December 02, 2017, 06:52:07 AM »
Thanks.  I bought the long ones, from Vulcan, but in hindsight I probably could have gotten away with the short reach.

Offline remington007

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Re: Shovel Decompressor
« Reply #13 on: December 28, 2017, 12:50:58 PM »
Update on the install. I tried machining decompressors in the spot shown in the pic in reply 8, (I had a old head).
There is simply not enough material in that area on the heads i have to put them there. (Aftermarket heads most likely are thicker there). As suggested by Kirby i put them between the 1st and 2nd fin. There is plenty of material there, i was able to use standard length releases used on twin cams.

Offline 76shuvlinoff

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Re: Shovel Decompressor
« Reply #14 on: December 28, 2017, 01:13:51 PM »
I like it.  :up:

Tried them out yet?

 My S&S 93" hates starters and low batteries. It can hang my 200 lbs in mid air on the kicker.
Being defenseless does not make you more safe.

Offline remington007

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Re: Shovel Decompressor
« Reply #15 on: December 28, 2017, 01:40:17 PM »
I have been having problems with stall on first rotation on start up. Cold and hot. Too cold and snowy here to ride it but its started every time so far. I just put in a v thunder 4010 cam so it will be dynoed soon.

Offline Hossamania

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Re: Shovel Decompressor
« Reply #16 on: December 28, 2017, 02:43:53 PM »
I like it.  :up:

Tried them out yet?

 My S&S 93" hates starters and low batteries. It can hang my 200 lbs in mid air on the kicker.

A friend had a 93", hard starter, set up the start button to turn over with the kill switch off, get it turning, then hit the switch to turn the ignition on and it fired off nicely.
Happiness does not buy money.