My Dyno Numbers & Tune Question
07-31-2012, 05:41 PM
#21
i had a janzer performance ported ls2 tb..lasted about a month before it **** the bed. before that was a stocker..both went bad. the problem i see with ported TB's is they for the most part are used tb's. no one offers new tb's that have been ported.
when i bought my new one i could feel the difference just pushing on the butterfly valve with my finger. my bad ones had hardly ant resistance..the new one took force to open it..i have not had a problem since and it will stay as it is.my car is finally problem free
when i bought my new one i could feel the difference just pushing on the butterfly valve with my finger. my bad ones had hardly ant resistance..the new one took force to open it..i have not had a problem since and it will stay as it is.my car is finally problem free
The place that I went to rebuilds the entire throttle body, including the motor, before porting, polishing, and powder coating.
08-01-2012, 03:26 AM
#23
TECH Enthusiast
Thread Starter
Join Date: Jun 2011
Location: New Haven, CT
Posts: 654
Likes: 0
Received 0 Likes
on
0 Posts
I just ordered an LS2 throttle body, harness adapter and adapter plate for my ls6 intake tonight. That will get me by until I scrounge up a little more cash for a fast 90 or 102, 90 mm will be plenty for my needs!
If this doesn't fix the issue I'll try a new gas pedal, wish I had a tech II scanner to test this stuff!!
Last edited by etcts-v; 08-01-2012 at 03:34 AM.
08-01-2012, 03:32 AM
#24
TECH Enthusiast
Thread Starter
Join Date: Jun 2011
Location: New Haven, CT
Posts: 654
Likes: 0
Received 0 Likes
on
0 Posts
I had a ported TB and intake on my old setup and was throwing reduced power. I believe I had the same code as yours and borrowed 2 TB's from buddies, and didn't fix the issue. Ended up being my gas pedal went bad it was like $80 or $90. So try and borrow a TB before you buy a new TB.
Also man that graph sure is choppy who did your tune because there's still power left on the table?
This was my old setup in my ls2 before the ls3 with ported ls2 intake and TB, afr225, and pat g cam.
Also man that graph sure is choppy who did your tune because there's still power left on the table?
This was my old setup in my ls2 before the ls3 with ported ls2 intake and TB, afr225, and pat g cam.
08-01-2012, 05:22 AM
#26
But that's the thing--you absolutely do feel the different in throttle response.
08-04-2012, 02:58 AM
#27
TECH Enthusiast
Thread Starter
Join Date: Jun 2011
Location: New Haven, CT
Posts: 654
Likes: 0
Received 0 Likes
on
0 Posts
I received my LS2 throttle body today, do you fellas think it is worth just polishing the rough edges of the throttle body lightly to get rid of the rough casting, no porting just a little polishing? Or should I leave it the **** alone?
08-04-2012, 08:39 AM
#28
Didn't a bad porting/polishing job get you into this conundrum in the first place?
08-04-2012, 03:46 PM
#31
TECH Enthusiast
Thread Starter
Join Date: Jun 2011
Location: New Haven, CT
Posts: 654
Likes: 0
Received 0 Likes
on
0 Posts
Yeah I think I'm going to just leave it alone. It's interesting the LS2 has very unique angles to it which must have been engineered for a reason. Only thing that seems odd to me is the casting is so rough around the edges, is this for creating turblance on purpose or cost in production reasons? I can't imagine GM wouldn't design the manufacturing of these to make them completely smooth if it would result in better performance, seems like it would be an easy fix.
Anyways, just ramblings of a noob.
Anyways, just ramblings of a noob.
