SlvrSierra4.8

iTrader: (24)

Did a search and came up empty on any solid info on the LS3 throttle body swap for L92/L9h 6.2's? Considering the swap on my 2011, but was cuious what the results are on this? I have heard heresay of the ramp rate being more agreesive and a small TB opening increase but other than that haven't heard much? Curious if anybody has done the swap and what the results were good or bad?

The fact that it is supposedly a true bolt-on swap has me considering trying it and porting it at the same time? Can anyone enlighten me on this?

zero2sixT

iTrader: (4)

Ive read its a more throttle response thing. Maybe a few more hp. I'll sell you my gold blade for $150. It does work, just not with my x link. It's not ported.

11Denali62

For what its worth...right after I bought my 2011 6.2 Sierra Denali I swapped a Tony Mamo (AFR Cylinder Head's Chief of R&D) custom ported LSA throttle-body onto my truck. It did nothing what so ever for performance and I think it may have made throttle response a tiny bit more sluggish? Maybe the computer was not adapting to the increased airflow?? Not sure. I took the TB off of my CTS-V before I traded it in. It helped throttle response nicely on the V but not at all on the truck. I sold it to a V owner two days later. From the V side of things, the difference between an LS3 and an LSA TB on the 6.2 was negligible at best. The LSA TB and the L92 were identical. Same numbers stamped into the casting, etc.

SlvrSierra4.8

iTrader: (24)

I have a line on one otherwise I would be interested. I have heard the same as well on throttle response

Did you ever have the ls3 TB on the truck or just the ported LSA?

zero2sixT

iTrader: (4)

Pm if you want it. It's a best offer type thing

silverado1ss89

I did the swap. I don't know if I got faster or gain anything. Just better throttle response .. Which I'm happy with ...

RS/SS 4.8

iTrader: (13)

I put one on my 4.8 and at part throttle it ran lean. Swapped tb to make sure that wasnt the problem on my g8 gt

SlvrSierra4.8

iTrader: (24)

Any other info out there on this?

rijrunr

I have an LS7 90MM ported on my 2010, but didn't notice any improvement after porting it.

You have to tune it to adapt the air flow change, but it will help you coming out of the hole. Not really much of a horsepower gain, but maybe a little. It's one of those things that's a link in the total chain of small bolt on improvements. Get a few bucks, buy one, takes 10 minutes to change it out and hardly anything to tune.

11Denali62

Sorry I missed this question before. I never had an LS3 TB on my truck, just the stock unit that came with the truck and the ported LSA.