It is currently November 21st, 2024, 1:26 pm

Custom 12" 3 cylinder OMC/E-tec build

View active topics

All times are UTC - 5 hours [ DST ]


Post new topic Reply to topic  [ 38 posts ]  Go to page 1, 2, 3, 4  Next
Author Message
 PostPosted: December 16th, 2014, 11:56 am   
Drag Racing Sponsor

Joined: October 30th, 2012, 12:14 am
Posts: 698
Location: Palmerston
For a while now, I've been wanting to build something a little different. Something that I haven't seen tried before. I love 3 cylinders for some reason. V6's are just too big and expensive to play with. When Rick informed me Top Gun had a blown 75 E-tec there and Top Gun informed me he not only had that but another blown 75/90hp longblock as well, I paid him a visit and it followed me home. After spending a couple days planning it out, I've figured out my project. The plan is a 12" mid cut from an old 20" I have laying around. I'll see if I can fit a set of clamps to it. If not, I'll machine some up. The flywheel off a 70hp OMC fits right on but space from the top of the crank to the block is different. I plan to adapt an old school 70hp OMC ignition to it. This will require machining to both the crank trigger base and the top of the block as well as an adapter plate to make the trigger and the stator fit. I picked up some 2 barrel carbs off Top Gun I'm planning to use as well. The intake is huge on this thing with 12 pedal reeds. Looks like you can put a lot of air through there and it has finger ports. The ports look rather small in the cylinder both intake and exhaust and I think restrictive cast-in exhaust may be a bit of a limiter on horsepower. I'll be making an adapter plate and tuner for it rather than cutting and welding the mids as they are pretty different and if the whole project doesn't work out, at least I'll have a cool 12" mid I can bolt a 56 on. Hopefully if it works, it won't tear up the nitro gear case right away. I'll have to machine up a cylinder head as well or modify the current one and make domes for it. Not sure what I'm going to do about pistons yet. I wonder if I preheat them first and weld up the pocket in the center if they will hold their shape dimensionally? I'll try an old piston and see I guess. Here's a picture of the basic parts I'll be starting with. I'll keep posting updates as I go. Oh ya, I should also add that these are 1295cc...

Image

Image

Image

_________________
Image
13' Rapid Craft 15" OMC 56
13' Critchfield 15" OMC 56
19' Laser 380 Ray (Future Project)


Top
 Profile Send private message  
 PostPosted: December 16th, 2014, 12:52 pm   
Team Member
User avatar

Joined: April 4th, 2012, 2:04 pm
Posts: 879
Location: Mississauga
are those crossflow V6 carbs? this thing should haul...

Steve

_________________
1991 Hydrostream AE-21 2002 OMC modd


Top
 Profile Send private message  
 PostPosted: December 16th, 2014, 1:18 pm   
Drag Racing Sponsor

Joined: October 30th, 2012, 12:14 am
Posts: 698
Location: Palmerston
beavertonae-21 wrote:
are those crossflow V6 carbs? this thing should haul...

Steve

Not sure what the carbs are from. They might be Mod 50 carbs. They were on a home made mod 50 that Paul had. I asked Fast Fred on BRF what the difference was between the V-4, V-6 carbs to the mod 50 and these look like the mod 50 ones. I guess the plates and nozzles are different between them.

_________________
Image
13' Rapid Craft 15" OMC 56
13' Critchfield 15" OMC 56
19' Laser 380 Ray (Future Project)


Top
 Profile Send private message  
 PostPosted: December 16th, 2014, 1:40 pm   
HPBC PRESIDENT
User avatar

Joined: March 30th, 2012, 2:25 pm
Posts: 2392
Location: Barrie, On
good luck Kevi! keep us posted i love shit like this.


Top
 Profile Send private message  
 PostPosted: December 16th, 2014, 8:17 pm   
Drag Racing Sponsor

Joined: October 30th, 2012, 12:14 am
Posts: 698
Location: Palmerston
Starting on the Mid

Image

Image

Image

_________________
Image
13' Rapid Craft 15" OMC 56
13' Critchfield 15" OMC 56
19' Laser 380 Ray (Future Project)


Top
 Profile Send private message  
 PostPosted: December 16th, 2014, 8:33 pm   
HPBC PRESIDENT
User avatar

Joined: March 31st, 2012, 5:53 pm
Posts: 3548
Location: Lapping lil charger
Ya...ok....that's awesome.

_________________
08 SRV w/3.1 Hydro-tec Phase lll

I've got enough torque to tear a hole....in time...


Top
 Profile Send private message  
 PostPosted: December 16th, 2014, 9:19 pm   
Team Member
User avatar

Joined: April 3rd, 2012, 1:52 pm
Posts: 3162
I really like it! Bet you could match it up with a GiG drag set back unit.


Top
 Profile Send private message  
 PostPosted: December 16th, 2014, 9:29 pm   
Team Member
User avatar

Joined: April 1st, 2012, 12:29 am
Posts: 1445
Love it!

_________________
Bullet 20 cc Super Comp
Delta with a slow 56
Jcraft with a ProV 150


Top
 Profile Send private message  
 PostPosted: December 16th, 2014, 9:48 pm   
Member
User avatar

Joined: August 12th, 2012, 8:37 pm
Posts: 2699
Location: lake Muskoka
that is friggin wicked :D

_________________
Image
89 excel 91 valero,81mph sold
1988 baja x 15, chopped to 13'11" modvp Bridgeport 91mph
19' tempest picklefork 84 mod vpcarb 102mph


Top
 Profile Send private message  
 PostPosted: December 17th, 2014, 12:01 am   
Team Member
User avatar

Joined: April 4th, 2012, 2:04 pm
Posts: 879
Location: Mississauga
siiiiick!!!!

_________________
1991 Hydrostream AE-21 2002 OMC modd


Top
 Profile Send private message  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 38 posts ]  Go to page 1, 2, 3, 4  Next

All times are UTC - 5 hours [ DST ]


Who is online

Users browsing this forum: No registered users and 30 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
cron


Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group
Style originally created by Volize © 2003 • Redesigned SkyLine by MartectX © 2008 - 2010