 Bill's 2.8 -4 Twin Plug Thread, 48x38 twin plug conversion |
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| Bills914-4 |
 Nov 24 2013, 08:46 AM
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#1
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Member  Group: Members Posts: 310 Joined: 1-March 08 From: suburbs of Miami FL. Member No.: 8,762 Region Association: South East States  |
Here's a few pic's of my planned conversion to twin plug with a Pauter cam (IMG:style_emoticons/default/smile.gif) , &
either MSII or MegaJolt with edis4 x 2 for ignition, Bill D.         |
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| Jake Raby |
Nov 24 2013, 05:59 PM
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Engine Surgeon Group: Members Posts: 9,394 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
Twin plug engines LOVE cylinder pressure! I always back up a few degrees on duration and start at 11:1 CR with the tightest deck possible. So far thats been good for 274HP from 2.8 liters on 91 octane. That engine had .025" deck.
You'll find that timing the engine is very, very far removed from your previous attempts and that it will optimize much leaner than it used to. |
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| Bills914-4 |
Nov 24 2013, 06:41 PM
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#3
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Member Group: Members Posts: 310 Joined: 1-March 08 From: suburbs of Miami FL. Member No.: 8,762 Region Association: South East States |
QUOTE(Jake Raby @ Nov 24 2013, 06:59 PM)  Twin plug engines LOVE cylinder pressure! I always back up a few degrees on duration and start at 11:1 CR with the tightest deck possible. So far thats been good for 274HP from 2.8 liters on 91 octane. That engine had .025" deck. You'll find that timing the engine is very, very far removed from your previous attempts and that it will optimize much leaner than it used to. Thanks Jake for chiming in , these are those vintage heads I picked up last year on your e-bay site (IMG:style_emoticons/default/smile.gif) , wow .025 deck is a little to close for me (IMG:style_emoticons/default/biggrin.gif) , the timing I've read & been told will be less ,they say as much as 6-8 degrees less , this twin plug stuff is all new to me but its time for a change on this motor ( 3yrs + running on this version) , I'd be happy with 200hp at wheels , 15 more than I have now (IMG:style_emoticons/default/biggrin.gif) , thanks Bill D. |
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Posts in this topic
WLD419 Bill's 2.8 -4 Twin Plug Thread Nov 24 2013, 08:46 AM
RobW You rock. :headbanger: Nov 24 2013, 08:54 AM Kirmizi :popcorn: Nov 24 2013, 08:54 AM kid914 :Qarl: Nov 24 2013, 08:56 AM Maltese Falcon Nice machining , twin plugs rock !
More pictur... Nov 24 2013, 12:03 PM 396 Wow, congrats! Nov 24 2013, 02:51 PM r_towle Any flow bench work done on the heads?
How did the... Nov 24 2013, 03:02 PM Woody This is what I'm talking about. :headbanger: ... Nov 24 2013, 04:30 PM barefoot
Here's a few pic's of my planned conversi... Nov 24 2013, 04:56 PM WLD419 Thank you for the compliments & kudos ,
Rich... Nov 24 2013, 05:46 PM WLD419 I'm hoping this cam will be ok , it was ground... Nov 24 2013, 06:48 PM gothspeed AWESOME!!!! :trophy:
What EDIS m... Nov 24 2013, 07:01 PM Jake Raby The cam is a little long for what I'd choose, ... Nov 24 2013, 07:17 PM
WLD419
The cam is a little long for what I'd choose,... Nov 24 2013, 07:32 PM gothspeed What valve spring arrangement will be used on thes... Nov 24 2013, 09:08 PM WLD419
What valve spring arrangement will be used on the... Nov 25 2013, 05:10 AM gothspeed
What valve spring arrangement will be used on th... Nov 25 2013, 11:35 PM WLD419
[quote name='WLD419' post='1962034' date='Nov 25 ... Nov 26 2013, 07:14 PM wndsrfr
Beautiful set up--love the velocity stacks--old ... Dec 1 2013, 09:36 AM WLD419
Beautiful set up--love the velocity stacks--old... Dec 2 2013, 07:02 PM jimkelly http://thedubshop.net/
would dual plug be worth a... Nov 25 2013, 08:41 AM rick 918-S
http://thedubshop.net/
would dual plug be worth ... Nov 25 2013, 08:53 AM Jake Raby
[quote name='jimkelly' post='1962104' date='Nov 2... Nov 27 2013, 09:19 AM Mark Henry
http://thedubshop.net/
would dual plug be worth ... Nov 25 2013, 11:56 AM FourBlades You are always doing something cool to your engine... Nov 25 2013, 09:33 AM McMark Awesome Build! :trophy:
I love MicroSquirt :... Nov 25 2013, 10:41 AM WLD419 Here's some pic's of the pistons I'll ... Nov 26 2013, 08:16 PM gothspeed Wow!!! Great pics :headbanger: !... Nov 27 2013, 12:39 AM WLD419
Wow!!! Great pics :headbanger: ... Nov 30 2013, 09:16 AM gothspeed What cylinder head cores were used to create this ... Nov 29 2013, 01:36 AM gothspeed Post more pics of this engine Bill!!! ... Nov 30 2013, 10:02 PM dfelz
Post more pics of this engine Bill!!... Nov 30 2013, 10:20 PM gothspeed :bump: in the hope more pics will be posted ........ Dec 2 2013, 04:44 PM WLD419 Here's a few pic's sorry these are older... Dec 2 2013, 07:26 PM carr914
Here's a few pic's sorry these are olde... Dec 2 2013, 07:30 PM gothspeed Totally freakin' awesome!!!! ... Dec 2 2013, 10:14 PM Mueller Bumping an old thread while looking for info....
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