Hopefully this is the right spot... - LS1TECH - Camaro and Firebird Forum Discussion

Small Block & Big Block Chevy Specific Mouse & Rat Motor Discussion & Conversions

Hopefully this is the right spot...

Thread Tools Search this Thread
Old 11-08-2011, 12:01 AM   #1
Teching In
Thread Starter
Join Date: Sep 2011
Posts: 32
Default Hopefully this is the right spot...

I figured it would be since the engine I am referring to is, IIRC, classified as a Gen 1+.

Does anyone have any experience with the Vortec 5700 L31 engine? I was looking into getting vital info for a swap I want to do into my '91 Jeep Cherokee, hence why I joined this website. My first idea was to run a '96 B-body LT1 in my XJ, and use the 4l60e transmission from a '97 Tahoe to unitilize the 3 piece tranny and 6 bolt tail pattern. Well, I am yet to find out if the Tahoe tranny will bolt up to and directly work with the LT1 engine.

My next idea was to use the L31. Not only was this a truck motor from the get go, IIRC is also has similiar torque ratings and peaks as the LT1, with only 5 hp less than the b-body LT1. Plus, whatever tranny I got would work right with the engine (if I go this route, this also opens the opportunity to swap to a manual NV3500 tranny). Plus, the L31 has a conventional cooling system, making it MUCH MUCH easier to get it to hook up to the original Jeep Cherokee radiator design, as where the LT1 would require my new radiator be chopped up and basically have everything swapped to the opposite side.

My main concerns with the L31 are as listed:

1) Is the L31 as tall or taller than the LM7? Reason being, using an LM7 requires a cowl hood on the Jeep XJ. I would like to avoid this if possible.

2) It seems as though the general concensus on the L31 induction and fuel injection system is that it is crap. Comments on this? I know many people dislike the 19 lb injectors, however I would only hope to get 300 hp from this engine. If the updated spider injector thing design would support this demand, then I see no issue.

3) Would basic bolt ons allow me to easily reach the 300 hp goal? I'm talking headers with fairly large pipes, 3 inch exhaust (mandrel bent sections), high flow cat, Flowmaster Super 44, bored TB, 1.6 RR's and matching springs, MSD coil. Anything else?

4) I have heard getting Roller Rockers to fit under the L31 valve covers can be troublesome due to the valve cover setup. Is this true?

Any other advice would be GREATLY appreciated. And if I am in the wrong section, I sincerely apologize, and will gladly edit my thread to a basic blank and admit my error.
ProbablyInsane is offline   Reply With Quote

Related Topics
Thread Thread Starter Forum Replies Last Post
Pulling a 5.3 advice... jhc7399 Conversions & Hybrids 13 11-15-2016 05:07 PM
Whats up... jhc7399 Introductions & Greetings 3 11-15-2016 01:27 AM
LQ4/9 swap into Jeep Cherokee XJ Caseythefalcon Conversions & Hybrids 3 12-12-2014 10:09 AM
4l60e Experts needed. ProbablyInsane Automatic Transmission 7 03-07-2012 01:57 PM
'96 B-Body LT1 Cooling System Questions ProbablyInsane LT1-LT4 Modifications 16 09-22-2011 09:54 PM

l31, spider, updated

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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

All times are GMT -5. The time now is 04:42 PM.

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
  • Ask a Question
    Get answers from community experts
Question Title:
Your question will be posted in: