going for it lq9 /1995 silverado

i have read until my eyes hurt and taken notes on it all this winter my 95 silverado is getting a lq9 . my 4l60e has been heavily modified to handle extra power as has most of the drivetrain gears axles locker ... i am going with nelson performance to handle the wiring and dirty dingo for the mounts stock radiator should handle cooling.. all the threads have been very helpful but some info conflicts other info who can help me the most? i have questions whats needed to run current 4l60e? stock exhaust manifolds off ??? or buy custom headers? smog is not an issue where i live so i can delete egr and have custom tune to best use what i have,,, where should i go for that? i want to leave engine internally stock but externally is open game.. a complete list of needed mods would be a dream cuz looking at so much info and trying to pick and choose whats best for my application gets to be a little stressful thanks in advance for helping the new guy to your page..

also is there a fuelpump capable of feeding my motor that will fit in my stock fueltank ? or do i need one of those also

not sure how the stock fuel pump is setup on the TBI trucks so I cant tell you what fits the stock sending unit but if there isnt anything out there then you may have to swap the sending unit and possibly the tank for a Vortec style one. An OEM Vortec fuel pump will run the 5.3 with no issue.

The fuel pump should be fine. Unless its old then swap it out for a new one. I am running my stock pump on my LQ4 and it is plenty. All stock except for CAI and headers. The new ECU should be able to control it. Its all controllable with a tune. Headers are your choice. Depends on your location. Salt in the winter will eat them alive unless you dont plan on driving it in the winter.

I am almost done with a 5.3/t56/14bolt swap into my 95 ecsb. 95 is still TBI so your fuel system operates at about 10-12 PSI IIRC. So you will need a stock vortec 96-98 fuel pump because the ls engines need 58 PSI. It is AcDelco Ep-381. Or you could go for something like a walbro 255 if you plan on more power in the future. Here is a link to my build thread, I haven't gotten around to starting one here yet. I also stopped posting as much in it. I can try to answer whatever questions I can, but remember I did a t56 and was 5 speed to begin with so I can't help with that.

http://www.gmfullsize.com/forum/showthread.php?t=259002

Going 6.0 locating fuel pump isn't an issue. Even swapping the tanks isn't an issue if need be. What about tranny issue ? No salt here. So no worries.

Few more specific questions for you who have done it. What fuel pump will run my 6.0 but will fit in the tank of a 1995 silverado ?? And. What's required to bolt my built 95 4l60e up to my 6.0? Spacers? Parts from the 4l80e that came behind the 6.0 ?

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Originally Posted by Jeebalow

So you will need a stock vortec 96-98 fuel pump because the ls engines need 58 PSI. It is AcDelco Ep-381. Or you could go for something like a walbro 255 if you plan on more power in the future.

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Did you miss this?

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Originally Posted by Jeebalow

Did you miss this?

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I did miss that. Thanks for the info. Narrowing it down one step at a time

Have you read this?
http://www.ls1truck.com/forums/lsx-t...onversion.html

If not read it at least 5 times. You'll get more from it each time. That should answer some of the questions you have.

To mate your '95 trans, you'll need a flat flexplate that come on 6.0, the flexplate spacer, and longer bolts. You'll need to elongate the holes for torque converter bolts on the flexplate.

I blew my '95 transmission 2 months after the swap, had 4L65E fully built (servos, Red Alto Eagle Powerpack, sleeved input drum, billet input shaft, Beast sunshell, yada yada yada) and ran it behind a tuned 5.3 w/ headers till it blew 2 years later. Don't think your transmission is invincible.

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Originally Posted by silverado_lover

To mate your '95 trans, you'll need a flat flexplate that come on 6.0, the flexplate spacer, and longer bolts. You'll need to elongate the holes for torque converter bolts on the flexplate.

I blew my '95 transmission 2 months after the swap, had 4L65E fully built (servos, Red Alto Eagle Powerpack, sleeved input drum, billet input shaft, Beast sunshell, yada yada yada) and ran it behind a tuned 5.3 w/ headers till it blew 2 years later. Don't think your transmission is invincible.

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Stock spacers? Are the longer bolts a specific application ( out of a 2002 or something else) or do I just buy a longer bolt

Jesus. i cant believe the flexplate/spacer ordeal is still in question after all this time. you can use the dished flexplate with a spacer on the trans side of it with your 60e. Longer bolts are not app specific. they are obviously required due to the extra thickness of the spacer. i did same swap as you. read my thread. 60e lasted 2 months but was stock with 200k on it. went to built 80e. no problems since. your gonna love the six-O...

Get the flat flexplate and this

http://www.jegs.com/i/Chevrolet-Perf...oductId=835483

http://www.pirate4x4.com/forum/11065304-post1.html

I have a flat flexplate with spacer that i ended up not using in my swap if your interested. no bolts tho. i used em. but summit sells them in a pack for nothing or you can just get some grade 8's or 10.9's from your local hardware store. let me know.

I hate to beat a dead horse, but ditch the 60 and find yourself an 80. I'm about to do the same swap as you (LQ9 into '98 ecsb) and from what I've read, the 60 just gives out after a while with all that newfound power. Plus you're going to be pedal happy for at least a month which is gonna add a bunch of extra stress to your trans anyways. Let me save you any further questioning, because I've already done the research, find an 80 out of any donor 2000s 2500 truck that already came with a 6.0L and it should bolt up no problems

Id love to put an 80 in my 2 door when I do my LS swap but I dont know how well it will fit considering my truck has 4WD with the shifter for it on the floor. Did any of the gmt400s have a 4L80 with 4x4 on the floor? I think the 4wd guys would also have to swap out the tailhousing as well

Yep, lots of 400's had the 80 with a floor shift transfer. My 6.5 dually has that combination as well as every 94-00 big block or diesel that I have owned.

sub'd

I hate to thread hi-jack, but im in the process of swapping an ls1 into my 95 c2500. Its got the manual 5 speed...what would be needed to mate the 5 speed to my ls1??

nevermind found it in previous posted link!!!

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Originally Posted by chvy=power

nevermind found it in previous posted link!!!

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6.0 came w/ nv4500, just get 6.0 clutch and flywheel

With mine being a light duty 2500 I was thinkin it had the nv3500? It's got a 350 TBI not a 6.0

If you have the nv3500 just get the flywheel, clutch ,pressure plate and pilot bushing for a 4.8 with the 5 speed. I have a 5.3 in a 1992 with a nv3500 and that is what I did.

http://pages.ebay.com/link/?nav=item...d=171413311322

Is that the clutch I need??

Not sure what trans you actually have but every k2500 I've seen had the 4500 didn't matter 6 or 8 lug. Even seen a 94 K2500LD 4.3l V6 4x4 w/ nv4500.

Mine is a c2500...

I'd check before you buy. Jmho

You were right it's got the nv4500

Cannot find specific answer to flexplate hole fix. If obs tc is 298mm and NBS tc is 300 mm than I only need to modify the holes 2mm overall. Have machine shop at my disposal is it really as easy as mill 2mm out of each hole towards center of flexplate ? Swap is happening soon as flexplate is done. Everything else is ready and waiting