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Re: new engines for the GMCs [message #316438 is a reply to message #316311]

Sat, 22 April 2017 07:08

Chris Tyler

Messages: 458
Registered: September 2013
Location: Odessa FL

Karma:

Senior Member

First thing [which I think we can all agree on] whatever improvement in milage - if any- via any of the setups mentioned- will likely NEVER pay for themselves even if you do all the labor yourself.We do these things because we can and are inveterate tinkerers but we have to keep reliability and usability in mind with the sometimes esoteric ideas we come up with

Couple of years back was working on a "science project"with my BIL re trans mods and swaps for the GMC. Items considered doable included lower 1st/2nd gearsets, lock up converter, switch pitch converter conversion and some internal tweaks. His business has taken off to the point he can hardly keep up with the HP builds while I was sidelined with complications from 2 hip surgeries so they havent been fully realized.

Regarding 425 torque capacity, his feeling is that the drive chain is the weak link but can be upgraded

Also looked at the 4WD case/blocked rear idea- its doable but would require extensive mods and cubic money

I am a huge fan of the LS engine series and think this can work...if you want to spend the money. An iron block LQ9 with a stroker crank will get you around 400 cid fairly easily. Add small turbo[s] even to a 5.7 and you will have a torque monster. I know for an absolute fact you can make 556 #/ft at 3500 on a bone stock LS1 at 10# of boost and still get 35 mpg hwy in a corvette

Im also a huge fan of turbos. Set up for low end boost vs HP {IE small housings and wastegates] you could hget by with a smaller engine under cruise conditions

Another option would be the conventional SBC/383 stroker. I had one with twin turbos in a mid engine vega
Even a 350 single turbo works well for a tow rig

I understand Jim B was looking at a turboed Olds 350 a while back

For myself, Im content with the 455 I have for now, especially since I dont use the coach much lately. However, as I have mentioned before, at some point I will probably add 2 small turbos and a early model fuel injection system to it as I have everthing i need already laying around

76 Glenbrook

[Updated on: Sat, 22 April 2017 07:12]

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		new engines for the GMCs By: Mike S on Thu, 20 April 2017 13:49
		Re: new engines for the GMCs By: Justin Brady on Thu, 20 April 2017 13:53
		Re: new engines for the GMCs By: Mike S on Thu, 20 April 2017 13:55
		Re: new engines for the GMCs By: Justin Brady on Thu, 20 April 2017 13:56
		Re: new engines for the GMCs By: Mike S on Thu, 20 April 2017 13:59
		Re: [GMCnet] new engines for the GMCs By: James Hupy on Thu, 20 April 2017 13:54
		Re: [GMCnet] new engines for the GMCs By: USAussie on Thu, 20 April 2017 17:37
		Re: [GMCnet] new engines for the GMCs By: Botts Chuck on Sat, 22 April 2017 16:59
		Re: new engines for the GMCs By: Mike S on Thu, 20 April 2017 14:09
		Re: new engines for the GMCs By: Hal StClair on Thu, 20 April 2017 14:39
		Re: [GMCnet] new engines for the GMCs By: jimk on Thu, 20 April 2017 14:30
		Re: new engines for the GMCs By: JohnL455 on Thu, 20 April 2017 14:32
		Re: new engines for the GMCs By: Hal StClair on Thu, 20 April 2017 14:53
		Re: new engines for the GMCs By: Mike S on Thu, 20 April 2017 14:50
		Re: new engines for the GMCs By: Mike S on Thu, 20 April 2017 15:00
		Re: new engines for the GMCs By: Mike S on Thu, 20 April 2017 15:03
		Re: new engines for the GMCs By: Mike S on Thu, 20 April 2017 15:10
		Re: new engines for the GMCs By: Mike S on Thu, 20 April 2017 15:16
		Re: new engines for the GMCs By: lqqkatjon on Thu, 20 April 2017 15:50
		Re: [GMCnet] new engines for the GMCs By: k2gkk on Thu, 20 April 2017 17:16
		Re: new engines for the GMCs By: Mike S on Thu, 20 April 2017 15:56
		Re: new engines for the GMCs By: Hal StClair on Thu, 20 April 2017 16:46
		Re: new engines for the GMCs By: Harry on Thu, 20 April 2017 16:49
		Re: new engines for the GMCs By: Matt Colie on Thu, 20 April 2017 17:07
		Re: new engines for the GMCs By: A Hamilto on Thu, 20 April 2017 17:18
		Re: [GMCnet] new engines for the GMCs By: Ronald Pottol on Thu, 20 April 2017 16:43
		Re: [GMCnet] new engines for the GMCs By: Hal StClair on Thu, 20 April 2017 17:01
		Re: new engines for the GMCs By: kerry pinkerton on Thu, 20 April 2017 17:09
		Re: new engines for the GMCs By: Mike S on Thu, 20 April 2017 18:29
		Re: new engines for the GMCs By: kerry pinkerton on Thu, 20 April 2017 20:00
		Re: new engines for the GMCs By: Mike S on Thu, 20 April 2017 20:07
		Re: [GMCnet] new engines for the GMCs By: USAussie on Thu, 20 April 2017 17:42
		Re: new engines for the GMCs By: Mike S on Thu, 20 April 2017 18:08
		Re: new engines for the GMCs By: kerry pinkerton on Thu, 20 April 2017 18:27
		Re: new engines for the GMCs By: kerry pinkerton on Thu, 20 April 2017 18:31
		Re: new engines for the GMCs By: Mike S on Thu, 20 April 2017 18:32
		Re: new engines for the GMCs By: Mike S on Thu, 20 April 2017 18:37
		Re: new engines for the GMCs By: Hal StClair on Thu, 20 April 2017 18:52
		Re: new engines for the GMCs By: Mike S on Thu, 20 April 2017 19:08
		Re: new engines for the GMCs By: Mike S on Thu, 20 April 2017 19:12
		Re: new engines for the GMCs By: Mike S on Thu, 20 April 2017 19:15
		Re: new engines for the GMCs By: jhbridges on Thu, 20 April 2017 20:57
		Re: [GMCnet] new engines for the GMCs By: Mr ERFisher on Thu, 20 April 2017 21:15
		Re: new engines for the GMCs By: Francois on Fri, 21 April 2017 00:35
		Re: new engines for the GMCs By: Chris Tyler on Sat, 22 April 2017 07:08
		Re: new engines for the GMCs By: jhbridges on Sun, 23 April 2017 07:55
		Re: new engines for the GMCs By: Mike S on Sun, 23 April 2017 09:29
		Re: new engines for the GMCs By: Hal StClair on Sun, 23 April 2017 15:21
		Re: new engines for the GMCs By: TR 1 on Mon, 24 April 2017 17:40
		Re: [GMCnet] new engines for the GMCs By: Ken Henderson on Mon, 24 April 2017 18:09
		Re: [GMCnet] new engines for the GMCs By: richshoop on Thu, 27 April 2017 21:17
		Re: new engines for the GMCs By: Chris Tyler on Mon, 24 April 2017 08:14
		Re: new engines for the GMCs By: Mike S on Mon, 24 April 2017 08:42
		Re: [GMCnet] new engines for the GMCs By: James Hupy on Mon, 24 April 2017 09:13
		Re: new engines for the GMCs By: jhbridges on Mon, 24 April 2017 11:12
		Re: new engines for the GMCs By: Mike S on Mon, 24 April 2017 20:17
		Re: new engines for the GMCs By: kerry pinkerton on Mon, 24 April 2017 21:05
		Re: new engines for the GMCs By: TR 1 on Tue, 25 April 2017 09:33
		Re: [GMCnet] new engines for the GMCs By: Dolph Santorine on Tue, 25 April 2017 09:41
		Re: new engines for the GMCs By: A Hamilto on Tue, 25 April 2017 11:45
		Re: new engines for the GMCs By: Hal StClair on Sat, 29 April 2017 01:31
		Re: new engines for the GMCs By: TR 1 on Mon, 01 May 2017 06:28
		Re: new engines for the GMCs By: jhbridges on Tue, 25 April 2017 11:06
		Re: new engines for the GMCs By: kerry pinkerton on Tue, 25 April 2017 12:24
		Re: new engines for the GMCs By: jknezek on Tue, 25 April 2017 12:49
		Re: new engines for the GMCs By: A Hamilto on Tue, 25 April 2017 12:52
		Re: [GMCnet] new engines for the GMCs By: Ken Henderson on Tue, 25 April 2017 13:25
		Re: new engines for the GMCs By: TR 1 on Wed, 26 April 2017 21:14
		Re: [GMCnet] new engines for the GMCs By: Olly Schmidt on Thu, 27 April 2017 06:04
		Re: new engines for the GMCs By: rcjordan on Thu, 27 April 2017 06:34
		Re: [GMCnet] new engines for the GMCs By: James Hupy on Thu, 27 April 2017 09:08
		Re: new engines for the GMCs By: jhbridges on Thu, 27 April 2017 11:22
		Re: [GMCnet] new engines for the GMCs By: James Hupy on Thu, 27 April 2017 11:41
		Re: new engines for the GMCs By: kerry pinkerton on Thu, 27 April 2017 14:51
		Re: new engines for the GMCs By: jhbridges on Thu, 27 April 2017 13:52
		Re: new engines for the GMCs By: kerry pinkerton on Sat, 29 April 2017 07:38

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