Rv motorhome build - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Hotrodding Basics
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 02-23-2012, 09:56 PM
Registered User
 
Last photo:
Join Date: Feb 2012
Posts: 120
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Rv motorhome build

Hello:
Want to throw this out there and get ur thoughts on what I am planning on building.
1) 1978 Mobile Traveler Rv @ 18.5 ft long. GVW is 8,400# with a 4.10 rear axle. (I think real weight is about 7,000#?) Motor is a 5.7 350 4 bolt main which will be a rebuilt motor from Mabbco Enterprises out of Tyler Texas. Going with dished cast pistons w/hardened rod bolts, nothing fancy.
2)The cam is going to be the Lunati 256/262 60101Lk cam w/lifters. Heads are going to be the RHS Vortec's with 170cc 202/160 valves.
3) I think I made a mistake by buying the KMJ airgap vortec intake. After I bought, I found a couple bad reviews. 1 on the intake I just bought( to much slag) and the claim that the distributor hole was off 1/4"? So, I am hoping that this has been corrected by the company that manufactures these.
3) I am thinking of the 680cfm vacuum secondaries Quick fuel carb.
4) Head gaskets are fel pro 1003 @ .041 compression thickness.

Well, I do not know the deck height, nor do I know the cc of the top of the pistons which are dished. But I think it is safe to say it is going to be near stock values.
What can I expect on Horse power? I am after low end torque for climbing all the mountains in Arizona on the highways, as well as low end torque when I take it off road for camping...I consider this my billygoat on wheels..It can get into places that 4x4 do..Nothing fancy here folks at all.
Thanks

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 02-24-2012, 08:58 AM
boatbob2
 
Join Date: Dec 2005
Location: north florida
Age: 76
Posts: 1,370
Wiki Edits: 0

Thanks: 6
Thanked 23 Times in 20 Posts
motor home..........

Hi,i sure hope you can live with 6 to 8 miles per gallon,been there,done that..........
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 02-24-2012, 09:51 AM
How fast is fast enough?
 
Last photo:
Join Date: Jun 2005
Location: St. Louis, MO
Age: 28
Posts: 8,609
Wiki Edits: 0

Thanks: 15
Thanked 273 Times in 255 Posts
Get gthe 1.94/1.5 valves if you can. Headers will help on power and mileage. Run gapless rings.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 02-24-2012, 01:02 PM
Registered User
 
Last photo:
Join Date: Feb 2012
Posts: 120
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Rv Motorhome build

Boatbob:
Currently this set up is getting around 8 miles a gallon. When the motor was fresher 7 years ago, I was getting almost 12mpg~! But climbing up the mountains was only 40 to 45mph. I am tired of running behind the big trucks going up mountains....
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 02-24-2012, 01:07 PM
Registered User
 
Last photo:
Join Date: Feb 2012
Posts: 120
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Rv Motorhome build

AP72:

Gapless rings, I will check into them. thx. Summit has a kit for my van that is a complete header muffler system...Headman headers @ 1-5/8" primaries, with mufflers, pipes and all hardware 2-1/2 pipes out of the headers.
The heads are completely setup already..Looks like the 202/160 stuff. with plates and screw-in studs.

So, how does it sound for possible Horsepower, figure 300-325? that is my target.
Just got the intake from KMJ..They are selling the Pro comp airgap intake...does not look too bad. Might need to clean up with a gasket match, though.

Last edited by Dannyringo; 02-24-2012 at 01:10 PM. Reason: add infor.
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 02-24-2012, 01:17 PM
DoubleVision's Avatar
Not Considered a Senior Member
 
Last photo:
Join Date: Oct 2002
Location: Heart Of Dixie
Age: 40
Posts: 10,652
Wiki Edits: 0

Thanks: 15
Thanked 58 Times in 55 Posts
In a RV horsepower would never enter my mind, my only thoughts would be what torque it developed. The RHS heads are excellant, we run them. Team them up with a Quadrajet and the low end throttle response is almost as sensitive as fuel injection especially teamed up with headers and a RV cam.
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 02-24-2012, 03:27 PM
Registered User
 
Last photo:
Join Date: Feb 2012
Posts: 120
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by DoubleVision
In a RV horsepower would never enter my mind, my only thoughts would be what torque it developed. The RHS heads are excellant, we run them. Team them up with a Quadrajet and the low end throttle response is almost as sensitive as fuel injection especially teamed up with headers and a RV cam.
Interesting...So, perhaps the Airgap is too much and maybe the performer would be better? My current Quadrajet for some reason only has the primaries opening; the secondaries do not work and I just do not remember if the previous owner stated he did that to save on fuel..Just do not remember...I could go with a carter though, no? what cha think...

Last edited by Dannyringo; 02-24-2012 at 03:29 PM. Reason: edit wording
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 02-25-2012, 08:41 AM
Registered User
 
Last photo:
Join Date: Feb 2012
Posts: 120
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Rv motorhome build

Here is a picture of my RV...18.5 ft long GVW is rated at 8,400# It has solar, a back up generator, and ham radio equipment inside, ready to go in an emergency. Fridge, stove, oven, shower and toilet. After the motor is redone, the next thing I am looking at is 4x4 conversion! I have been looking at suburbans in the same yr range (up to 86) an it looks quite easy from what I saw of the frame mounts on the front end. I am curious if these parts could be harvested from a suburban and bolted and welded into place. I already know that I need to get the undercarrige out of mine and the burb's into mine. shock mounts and spring mounts, tranny mounts, ect....
Attached Thumbnails
Click image for larger version

Name:	Snapshot_20110327.jpg
Views:	145
Size:	14.2 KB
ID:	63373  
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 02-25-2012, 11:49 AM
38 Special1's Avatar
Registered User
 
Join Date: Jan 2012
Location: Irondale, Alabama
Posts: 6
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Look for one ton stuff with a Dana 60 front and a 14 bolt rear. The Suburban, may have a Dana44 up front, and probably not hold up.
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 02-25-2012, 01:23 PM
Registered User
 
Last photo:
Join Date: Feb 2012
Posts: 120
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Rv motorhome build

38 special:
Your right on the 14 bolt rear end. currently that is what I have in it. I kind of think it should have been dually rear axle, but Mobile Traveler used the 1 ton cutaway van with single rear wheels...I would have to convert over to a detroit locker, or posi rearend. I am tired of getting stuck in sand, mud and loose gravel. It sinks like the Titanic and down here in Az., there are not a lot of heavy tree's to use a winch on to pull this boat anchor out~! They had a design flaw when they installed the holding tanks in the rear. They are so low to the ground that I have destroyed them several times and recently fubared them to the point they can't be repaired anymore...So, 4x4 and a lift kit, after the new motor...Currently looking at Craig's list looking for 3/4 /1 ton 4x4 chevy truck up to 1982 for the running gear...Dana 60 with 4.10's...If nothing else, we are going to have fun doing it and learn through mistakes...Measure 4x, cut once~!
Thanks for the reply~!
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 02-26-2012, 05:10 AM
How fast is fast enough?
 
Last photo:
Join Date: Jun 2005
Location: St. Louis, MO
Age: 28
Posts: 8,609
Wiki Edits: 0

Thanks: 15
Thanked 273 Times in 255 Posts
Running ms1 and a tbi unit would work well in this app and is pretty cheap. Usually I would go with a standard oil pump but in your high stress application id go high vol high presure. The airgap intake will work fine. Id go with a 200 or 210 thermostat and an oil cooler too. Tbi injection will really help your fuel consumption over a quadrajet, and tuning is a breeze. The more running conditions vary the more going efi can help, I think this would qualify and very varried.
Reply With Quote Quick reply to this message
  #12 (permalink)  
Old 02-26-2012, 07:40 AM
Registered User
 

Last journal entry: Some More Roll Cage Fabrication
Last photo:
Join Date: Apr 2010
Location: Ohio
Age: 31
Posts: 233
Wiki Edits: 0

Thanks: 0
Thanked 3 Times in 3 Posts
It might be too late, but if you find the right suburban/pickup you can take the entire frame and drivetrain with the BBC. The 454 will make the torque you are looking for with a few minor modifications. A later year model will net you fuel injection and a 4l80e as well. If you do it right you can sell your small block and get your frame, 4x4, and BBC and make some money.

I have a 98 2500 w/ a 454 4x4 long bed reg cab. Want me to measure the wheel base and stuff for you?
Reply With Quote Quick reply to this message
  #13 (permalink)  
Old 02-26-2012, 07:59 AM
38 Special1's Avatar
Registered User
 
Join Date: Jan 2012
Location: Irondale, Alabama
Posts: 6
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by Dannyringo
looking for 3/4 /1 ton 4x4 chevy truck up to 1982 for the running gear...Dana 60 with 4.10's...~!

Beware of the 3/4 Ton. Many came with a Dana 44HD. That is a Dana 44 with 8 lug wheels.

Last edited by 38 Special1; 02-26-2012 at 08:08 AM. Reason: Quote error
Reply With Quote Quick reply to this message
  #14 (permalink)  
Old 02-26-2012, 09:53 AM
Registered User
 
Last photo:
Join Date: Feb 2012
Posts: 120
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by ap72
Running ms1 and a tbi unit would work well in this app and is pretty cheap. Usually I would go with a standard oil pump but in your high stress application id go high vol high presure. The airgap intake will work fine. Id go with a 200 or 210 thermostat and an oil cooler too. Tbi injection will really help your fuel consumption over a quadrajet, and tuning is a breeze. The more running conditions vary the more going efi can help, I think this would qualify and very varried.
I found this ironic, because this morning, before coming here, I was just looking at the FAST efi under 600hp conversion system. I was really impressed with what I saw. Best of all, I don't need to become a rocket scientist to install it, so that might be an option. I do have a question, though. Some years ago, I had a 1 ton chevy TBI truck. I tried like hell to get better fuel mileage by going with a mild chip. The best mileage was only 10mpg. Needless to say, I got rid of it. Then I ran into this vehicle and gambled on it by trading a 1978 Jeep wagoneer straight up. The Jeep did get 12mpg. This rig almost got the same mileage, as long as I did my part. (55mph) on the freeways and best throttle on streets...Now the motor is toasted, so options are still on the table for this build..
Thanks for the idea and again, I was looking at the FAST EFI fuel injection kit this morning~!
Reply With Quote Quick reply to this message
  #15 (permalink)  
Old 02-26-2012, 10:04 AM
Registered User
 
Last photo:
Join Date: Feb 2012
Posts: 120
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by ethn_bert
It might be too late, but if you find the right suburban/pickup you can take the entire frame and drivetrain with the BBC. The 454 will make the torque you are looking for with a few minor modifications. A later year model will net you fuel injection and a 4l80e as well. If you do it right you can sell your small block and get your frame, 4x4, and BBC and make some money.

I have a 98 2500 w/ a 454 4x4 long bed reg cab. Want me to measure the wheel base and stuff for you?
ethn_bert.
Wow, if you can do a measurement that would be great. I can find out how long mine is, but I would have to get over to the storage place and get the manuals out to learn the info. From what I researched, up to 86 would work under mine, but as another person just said, beware of the Dana 44, not strong enough...I am a veteran and I have been looking at the M1009 trucks the military is/was using. They are 1-1/4 ton rated with Dana 60's both front and rear with very heavy duty parts under them (detroit lockers, but w/4.56)...Only drawback is the diesel motor in them. they suck~! So, I have been looking for one within my $ range to get through Gov. auction and then sell what is left on ebay..
Reply With Quote Quick reply to this message

Recent Hotrodding Basics posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




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

Posting Rules
You may post new threads
You may 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 On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Big block out of motorhome Crazy Fast on Ice Engine 6 11-02-2008 11:23 AM
BBC in a motorhome boatanchors Engine 5 09-14-2008 07:07 PM
Who Says You Can't Race a Motorhome? Blazin72 Hotrodders' Lounge 24 12-09-2007 07:24 AM
Amphibious Motorhome! TNTster Hotrodders' Lounge 4 09-14-2004 01:30 AM


All times are GMT -6. The time now is 03:44 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.