Engine advice - opinions - The 1947 - Present Chevrolet & GMC Truck Message Board Network

TigerDMD · 07-19-2012, 10:23 PM

I need a little advice/input. I currently have a rebuilt 250 inline 6 paired with a turbo 350. I have been presented with a really good opportunity to replace said engine with either a 5.3/4L60-E or 4.8/4L60-E. Has anyone done the switch that would recommend it or should I just leave it as it is. Also what could I expect to sale the 250/350 for - its was rebuilt in Mar 2011 and runs extremely well - has power steering and HEI. Thanks

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oklalawnboy · 07-19-2012, 11:41 PM

My 2 cents... I haven't done the swap but my Suburban with the 5.3 runs WAY better than the buddies 4.8.

TigerDMD · 07-20-2012, 07:09 AM

Anyone else - any ideas what I could maybe sell my 250 for?
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sir_talk_alot · 07-20-2012, 08:42 AM

Man those 5.3s are awesome. They are ls design if I'm not mistaking. They sound smooth and tough. My buddy has it in an 05 sierra and with the hypertech programmer that truck really runs. He has dual glasspacks and you could never tell that they are, sounds like a flowmaster setup. No cracking and popping.
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cdowns · 07-20-2012, 09:35 AM

not much resale value in the 6cyl engines from what i have seen over the years in fact sometimes it is really hard to give one away

dan42 · 07-20-2012, 09:49 AM

Quote:

Originally Posted by cdowns

not much resale value in the 6cyl engines from what i have seen over the years in fact sometimes it is really hard to give one away

I agree; unfortunately not a whole lot of demand, but ou never know. They are great little engines.
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GRX · 07-20-2012, 10:00 AM

Quote:

Originally Posted by TigerDMD

its was rebuilt in Mar 2011 and runs extremely well

If it runs extremely well why replace it? The inline 6 is a very good design. Venture to guess it will out last the other offerings mentioned.

TigerDMD · 07-20-2012, 11:59 AM

It does run well - they are having to pull the engine to replace the rear main seal - that's what brought all of this up. It's under warranty- so it's not costing me anything, but thought it might be a could time to swap. It I don't do the switch, I am thinking about swapping to a 700r - how would that be paired with the 250?
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chopnchaneled · 07-20-2012, 01:58 PM

Scott if you look at the power you engine makes in comparision to a 350 v/8 they are pretty close.
as you know i have a 350 with a 700r4 in my 68 and i love it, It has a lower 1st gear and will pull off very well and when i'm on the interstate at 70 mph its turning 2001 rpms. and thats with a 3:73 rear end.
One of the things you will have to deal with is the TV cable and mating it to your carb. linkage with the 700 trans.
Maybe some one has already done it on here.
anyway good luck with what you decide to do.

07-19-2012, 10:23 PM	#1
TigerDMD Registered User Join Date: Feb 2011 Location: Laurens, SC Posts: 182	Engine advice - opinions I need a little advice/input. I currently have a rebuilt 250 inline 6 paired with a turbo 350. I have been presented with a really good opportunity to replace said engine with either a 5.3/4L60-E or 4.8/4L60-E. Has anyone done the switch that would recommend it or should I just leave it as it is. Also what could I expect to sale the 250/350 for - its was rebuilt in Mar 2011 and runs extremely well - has power steering and HEI. Thanks Posted via Mobile Device __________________ http://i358.photobucket.com/albums/o...0/DSC02997.jpg

07-19-2012, 11:41 PM	#2
oklalawnboy Registered User Join Date: Jan 2012 Location: Glencoe Alabama Posts: 510	Re: Engine advice - opinions My 2 cents... I haven't done the swap but my Suburban with the 5.3 runs WAY better than the buddies 4.8. __________________ 72 Cheyenne super 10 08 3500 HD 4dr dually 12 ford flex (wifes ride) 76 Monte Carlo 83 Chevy short wide Silverado 96 Mazda Miata, 2000 Allegro Bus

07-20-2012, 07:09 AM	#3
TigerDMD Registered User Join Date: Feb 2011 Location: Laurens, SC Posts: 182	Re: Engine advice - opinions Anyone else - any ideas what I could maybe sell my 250 for? Posted via Mobile Device __________________ http://i358.photobucket.com/albums/o...0/DSC02997.jpg

07-20-2012, 08:42 AM	#4
sir_talk_alot Registered User Join Date: May 2011 Location: Mayflower,AR Posts: 802	Re: Engine advice - opinions Man those 5.3s are awesome. They are ls design if I'm not mistaking. They sound smooth and tough. My buddy has it in an 05 sierra and with the hypertech programmer that truck really runs. He has dual glasspacks and you could never tell that they are, sounds like a flowmaster setup. No cracking and popping. Posted via Mobile Device __________________ -Mike- '94 GMT 400 ext z71 3" body, 3 in rough country, hd mirrors, 20" motometals on 35s

07-20-2012, 09:35 AM	#5
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	Re: Engine advice - opinions not much resale value in the 6cyl engines from what i have seen over the years in fact sometimes it is really hard to give one away __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

07-20-2012, 11:59 AM	#8
TigerDMD Registered User Join Date: Feb 2011 Location: Laurens, SC Posts: 182	Re: Engine advice - opinions It does run well - they are having to pull the engine to replace the rear main seal - that's what brought all of this up. It's under warranty- so it's not costing me anything, but thought it might be a could time to swap. It I don't do the switch, I am thinking about swapping to a 700r - how would that be paired with the 250? Posted via Mobile Device __________________ http://i358.photobucket.com/albums/o...0/DSC02997.jpg

07-20-2012, 01:58 PM	#9
chopnchaneled Registered User Join Date: Dec 2009 Location: Atlanta, Ga. Posts: 1,050	Re: Engine advice - opinions Scott if you look at the power you engine makes in comparision to a 350 v/8 they are pretty close. as you know i have a 350 with a 700r4 in my 68 and i love it, It has a lower 1st gear and will pull off very well and when i'm on the interstate at 70 mph its turning 2001 rpms. and thats with a 3:73 rear end. One of the things you will have to deal with is the TV cable and mating it to your carb. linkage with the 700 trans. Maybe some one has already done it on here. anyway good luck with what you decide to do. __________________ I don't think we get smarter as we get older. We just run out of Stupid things to do.



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