Thread: LS2 Throttle Body Install

EDITED: first off thanks to fieroguru, DavidGXP, and GXP25 for their research in this area the FSM GXP25 provided was the last unknown for this swap turns out my alldata Ls4 wiring diagram was wrong, so i deleted it out of the original post please disregard quotes of the orginal in posts mentioned below..


Courtesy of GXP25
**This is a general guide ALWAYS verify your year TB pinouts first**


PINOUTS ARE AS FOLLOWS


LS2 GTO TB . LS4 TB
PIN A ---- PIN F
PIN B ---- PIN E
PIN C ---- PIN H
PIN D ---- PIN A
PIN E ---- PIN B
PIN F ---- PIN D


NOT USED PIN G&C ON THE LS4 HARNESS


**If you have idle surge or hanging idle see below







http://youtu.be/WI-RuRQ1nDc




PARTS LIST:


TB adapter here 55 USD http://www.alpermotorsports.com/inde..._detail&p=1688


Pigtail: LS2 Throttle Body Pigtail Brand New LS2 TB Pigtail | eBay


Throttle body: Ebay got mine for 140 shipped


all bolts are m6 x 1.0 you will need 4 for the TB and 3 are included with the TB adapter to the intake manifold


Thickness of LS2 TB for bolt length



Adapter





For issues with idle like i eventually had you will need to adjust 2 tables in the pcm


ETC scaler and Base idle airflow need to be adjusted to get you idling right.
here are the values i used with good sucess results may vary.

Any noticeable difference?

Originally Posted by mudneck4

Any noticeable difference?

kind of a unfair question the LS1 intake is worth 15hp alone its also ported and instead of a 75mm TB theres a 90 now so needless to say theres more involved then just the TB here. When i get it on this weekend ill update

I'm loving this!

Didn't know the ls1 or I read over it lol... I heard the ls1 intake swap was a b!tch to so?

I can pick up a ls1 intake for 50$ so that's why I'm asking

If you can get a ls6 though i d get that But regardless the ls1 over the ls4 any day theres plenty of write ups though on ls1tech to get you through matter of fact nmp0098 has a writeup on this site iirc

Ill look into it. Might just be having one pop up friends going with a fast intake on his 00 camaro and he has a ls6 right now

Grab it and remember all ls6 intakes have a flat underside ls1's are curved

Be flat out honest I'm a ford guy at heart and the Prix grew on me!!! What's the difference between flat bottom and curved? Clearance issues? Flow issues?

Nah that's just how gm made them ls6 intakes are way better than ls1's intakes but I'm cheap and not in a hurry to get one yet.

btw i like your motivated fu*k yea at the end of the video...youd think you just made a major improvement or something on your car

Originally Posted by marines542

btw i like your motivated fu*k yea at the end of the video...youd think you just made a major improvement or something on your car

**** I was happy I sent blow up my pcm lol but motivated.... Hell yea lol

Do u remember the length bolts u ended up going with on the ls1 intake with the ls2 tb and all?

40mm. M6 bolts.