RV Trip Planning Discussions

Go Back   iRV2 Forums > THE OWNER'S CORNER FORUMS > Revcon Owner's Forum
Click Here to Login

Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
 
Thread Tools Search this Thread Display Modes
 
Old 04-04-2019, 11:22 PM   #1
Junior Member
 
MCH1JDV's Avatar
 
Join Date: Mar 2019
Location: Cass City, Michigan
Posts: 17
1978 Engine and Trans Rebuild

Hello all, Just showing off my engine rebuild I started last fall
Attached Thumbnails
Click image for larger version

Name:	IMG_1591.jpg
Views:	34
Size:	164.1 KB
ID:	240722   Click image for larger version

Name:	IMG_1593.jpg
Views:	32
Size:	132.4 KB
ID:	240723  

Click image for larger version

Name:	IMG_1634.jpg
Views:	29
Size:	315.3 KB
ID:	240724  
Attached Images
 
__________________

MCH1JDV is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 04-04-2019, 11:27 PM   #2
Senior Member
 
HJLowell's Avatar
 
Join Date: Oct 2011
Location: Wolf Creek dam area, Ky. Cardinal Center Camp Ground, Marengo Oh. or on the road.
Posts: 657
Now that a very big project.
I see your very neat and tidy.
And
You have a good helper.
Thanks for sharing
Enjoy
__________________

HJLowell is offline   Reply With Quote
Old 04-04-2019, 11:29 PM   #3
Junior Member
 
MCH1JDV's Avatar
 
Join Date: Mar 2019
Location: Cass City, Michigan
Posts: 17
engine is a 403 oldsmobile bore .040 over- added forged pistons-H beam rods-aluminum cylinder heads-roller rockers-edelbrock intake- high pressure and volume pump- Still trying to decide on what fuel system to use
Attached Thumbnails
Click image for larger version

Name:	567539226.jpg
Views:	27
Size:	299.9 KB
ID:	240736   Click image for larger version

Name:	IMG_2173.jpg
Views:	28
Size:	145.7 KB
ID:	240737  

Click image for larger version

Name:	IMG_2174.jpg
Views:	27
Size:	165.6 KB
ID:	240738   Click image for larger version

Name:	IMG_2782.jpg
Views:	28
Size:	311.0 KB
ID:	240739  

MCH1JDV is offline   Reply With Quote
Old 04-11-2019, 05:55 PM   #4
Senior Member
 
Daveinet's Avatar
 
Join Date: Dec 2013
Location: Chicago Area
Posts: 645
Jim Bounds at GMCCoop had several castings made with bungs molded into the runners. These were made so they could be drilled for port injection. These intakes were flat with no rise, as they needed to still fit below the floor.



After having done port injection on my 502, I'm a big fan of it. Much better than throttle body.
__________________
2004 AllegroBay 34XB Nov 2017 Banks, Front & Rear Trac bars, Konis
Sold:'83 Revcon Prince 31' FWD GM Performance 502 w/Edelbrock MPFI, Thorley Tri-Ys & Magnaflows, 4L85E 4 spd
Daveinet is offline   Reply With Quote
Old 04-11-2019, 11:18 PM   #5
Junior Member
 
MCH1JDV's Avatar
 
Join Date: Mar 2019
Location: Cass City, Michigan
Posts: 17
I am trying to decide on what EFI fuel system to go with- I like the Holley Sniper so far but I see K&N has a simple fuel injection system that goes under the carb. I just cant find anyone that has used it. I also need to modify the engine cover due to taller intake. Only intake I could use with the 455 heads on a 403. Never thought of the port injection.
Attached Thumbnails
Click image for larger version

Name:	IMG_2806.jpg
Views:	22
Size:	290.4 KB
ID:	241648  
MCH1JDV is offline   Reply With Quote
Old 04-12-2019, 06:16 AM   #6
Senior Member
 
Join Date: Aug 2017
Posts: 1,144
I like the way the complete assembly just "rolls" out from under the motorhome. Nice job on the rebuild.
__________________
1993 Tiffin Allegro Bay 32'
Soppy is online now   Reply With Quote
Old 04-12-2019, 06:27 AM   #7
Senior Member
 
Join Date: Oct 2018
Posts: 113
Add a nitrous system for powering up steep grades ;-)
__________________
2013 F150 5.0
2005 keystone zeppelin 241
Wrktfsh is offline   Reply With Quote
Old 04-12-2019, 01:13 PM   #8
Junior Member
 
MCH1JDV's Avatar
 
Join Date: Mar 2019
Location: Cass City, Michigan
Posts: 17
Quote:
Originally Posted by Wrktfsh View Post
Add a nitrous system for powering up steep grades ;-)
I actually thought about that prior, just doing a small 100 horse kit.
I like the yearly trip to and from Myrtle Beach South Carolina from Michigan. I like to take the big hill Fancy Gap-- North carolina - Virginia. 7% grade for 7 miles. 1st year I had to pull to the side to cool trans and engine. Next year I installed twin Hayden engine oil and trans oil coolers with fans about half way back under neath motorhome. Also went with the Hayden severe duty fan clutch. I made it last year non stop but only topped hill at 30MPH. Not bad being it was mid aftrenoon 90 degree day. Looking forward to a trip this summer being the old engine was OEM rated around 180 and now I will be very close to 400 HP .
MCH1JDV is offline   Reply With Quote
Old 04-12-2019, 08:33 PM   #9
Senior Member
 
Daveinet's Avatar
 
Join Date: Dec 2013
Location: Chicago Area
Posts: 645
Quote:
Originally Posted by MCH1JDV View Post
I am trying to decide on what EFI fuel system to go with- I like the Holley Sniper so far but I see K&N has a simple fuel injection system that goes under the carb. I just cant find anyone that has used it. I also need to modify the engine cover due to taller intake. Only intake I could use with the 455 heads on a 403. Never thought of the port injection.
Except for cold starts and high altitude correction, throttle body may actually perform worse than a well tuned carb. One of the problems is that historically, a low pressure injector will not atomize the fuel as well as a carb. The second issue is that to help atomize the fuel, the intake is heated. The problem with that is that the heat causes the air to expand. As a result, you can not fit as much air in the intake. Thirdly, if you are mixing fuel, that means the fuel is taking up space in the intake. Lastly the intake tube length is limited, because if the travels too far, the fuel falls out of the air. This limits the intake design.

Port injection sprays the fuel on the intake valve. The heat on the valve atomizes the fuel. It also helps to cool the intake.

Oh, there is one other advantage. If you heat the intake, the underside of the intake is also heated. That means that oil that sprays on the bottom of the intake gets burnt. This shortens the life of the oil.
__________________
2004 AllegroBay 34XB Nov 2017 Banks, Front & Rear Trac bars, Konis
Sold:'83 Revcon Prince 31' FWD GM Performance 502 w/Edelbrock MPFI, Thorley Tri-Ys & Magnaflows, 4L85E 4 spd
Daveinet is offline   Reply With Quote
Old 04-19-2019, 09:58 AM   #10
Senior Member
 
BJohnsonsv's Avatar
 
Vintage RV Owners Club
Join Date: Jun 2017
Location: San Jose, CA
Posts: 199
Quote:
Originally Posted by MCH1JDV View Post
I am trying to decide on what EFI fuel system to go with- I like the Holley Sniper so far but I see K&N has a simple fuel injection system that goes under the carb. I just cant find anyone that has used it. I also need to modify the engine cover due to taller intake. Only intake I could use with the 455 heads on a 403. Never thought of the port injection.
So great to see this progress.

Can't wait to hear how it runs and of your future journeys. I'm also watching closely to see your aspiration choice. I hope to go EFI in a year or two.
__________________
~~~~~~~~~~~~~~
1972 RevCon 250 D/T
View my progress on Flickr https://flic.kr/s/aHskU8RN6W
BJohnsonsv is offline   Reply With Quote
Old 04-20-2019, 07:51 PM   #11
Junior Member
 
MCH1JDV's Avatar
 
Join Date: Mar 2019
Location: Cass City, Michigan
Posts: 17
Ran engine today- waiting on a few more parts- hope to start the install next weekend. Attached link to vid on youtube


MCH1JDV is offline   Reply With Quote
Old 04-20-2019, 08:13 PM   #12
Senior Member
 
Daveinet's Avatar
 
Join Date: Dec 2013
Location: Chicago Area
Posts: 645
You got to be careful adding much horsepower to that setup. You will exceed the strength of the Dana 60. Don't floor it in the low gears. A hard downshift can break things as well.

I was running about 420 HP on my '83. I broke the diff twice. The Dana 60 means 6000 LBS torque rating. I don't know what your ratios are for the Slantmobile, but it is worth calculating.



Do you know what a differential spredder is? Basically it is a tool that spreds the pumpkin, so you can pull the carrier out. They are typically rated for 10,000 lbs - meaning that 10K of force will spread the pumpkin far enough to remove the gears. So keeping that in mind, 6000 lbs of force on the gears will cause the pumpkin to spread some. The ring gear looses mesh with the pinion gear. This makes it much easier to break teeth off the ring gear. That is really were the rating comes from.
__________________
2004 AllegroBay 34XB Nov 2017 Banks, Front & Rear Trac bars, Konis
Sold:'83 Revcon Prince 31' FWD GM Performance 502 w/Edelbrock MPFI, Thorley Tri-Ys & Magnaflows, 4L85E 4 spd
Daveinet is offline   Reply With Quote
Old 04-21-2019, 08:07 AM   #13
Junior Member
 
MCH1JDV's Avatar
 
Join Date: Mar 2019
Location: Cass City, Michigan
Posts: 17
All i have is the olds toronado final drive with TH425 trans, not even close to the Dana 60. I will never drive it hard by taking off fast ro wide open throttle. I just baby it along. No matter what you beef up somewhere else there is going to be a weaker link. On the trans rebuild we did up the pressure on the clutches to prevent any slip, removed the passing gear(auto down shift) solenoid. I always let off the gas to manually down shift and then ease into the throttle so no harsh jerks to the drive train when in the hills or have to pass. I just upped the horse power for sound and feel that the engine wont have to work so hard.
MCH1JDV is offline   Reply With Quote
Old 04-21-2019, 03:37 PM   #14
Senior Member
 
Daveinet's Avatar
 
Join Date: Dec 2013
Location: Chicago Area
Posts: 645
I thought the Olds used a highly modified Dana 60.
__________________

__________________
2004 AllegroBay 34XB Nov 2017 Banks, Front & Rear Trac bars, Konis
Sold:'83 Revcon Prince 31' FWD GM Performance 502 w/Edelbrock MPFI, Thorley Tri-Ys & Magnaflows, 4L85E 4 spd
Daveinet is offline   Reply With Quote
Reply

Tags
engine, rebuild



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Sunshine and happiness - 1978 Eleganza II Rachel1970 Vintage RV's 0 10-13-2018 06:44 PM
Help! 1978 Trans Van in registration limbo... Geddycorn Vintage RV's 4 05-22-2018 10:31 PM
OPINION: Rebuild Engine on Current Coach, or Sell and Buy Slightly Older Monaco ereadingrv Monaco Owner's Forum 74 05-26-2016 06:59 AM
Hit and Miss Antique engine rebuild? monkey Hobbies, Passions & Pastimes 21 01-17-2014 09:32 AM
1978 dodge sportsman field and stream jteichmer Class C Motorhome Discussions 2 01-03-2013 08:02 PM

» Featured Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 04:49 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.