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LS2 Throttle Body Install

91parkave

91parkave

New member
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


300qtj6_zps564f0652.png





http://youtu.be/WI-RuRQ1nDc




PARTS LIST:


TB adapter here 55 USD http://www.alpermotorsports.com/index.php?l=product_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
IMG_20130411_093311_zpsbf3e06ab.jpg



Adapter
IMG_20130411_092939_zps0ce4141e.jpg





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.
 
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Re: LS2 TB install

mudneck4 said:
Any noticeable difference?
Click to expand...
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
 


Re: LS2 TB install

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
 
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Re: LS2 TB install

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
 
Re: LS2 TB install

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?
 
Re: LS2 TB install

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.
 


Re: LS2 TB install

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
 
Re: LS2 TB install

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


I Had to drill and tap my TB adapter to fit a new fitting for the brake booster vaccum line. I used a 1/4 NPT with 1/2 dia. barded end.
 
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