Technical question, Stock throttle body size?

[ScottieBlkSS]

Does anyone know what size the stock Throttle body is on the LS3? I am thinking 90mm But not 100% certain on that, Can anyone shed some firm advice on this?
Thanks All;
Scottie

[SC2150]

The LS2/3 are 90mm.

[ScottieBlkSS]

Exactally what I was thinking... I appreciate the info

[Havok1105]

is that the same for the L99?

[Vettecityman]

So if I was to get a 92mm would the stock computer compensate for the extra 2mm?

[lemontwist]

i wouldn't waste the money on 2mm.
what other mods have you done that necessitate a larger throttle body?

[joshnmn]

Stock throttle bodies are capable of 1500+ hp. No reason to change it

[jcampos]

Originally Posted by Vettecityman

So if I was to get a 92mm would the stock computer compensate for the extra 2mm?

Just purchase a ported TB or send yours in?

[GAD]

Originally Posted by jnmn

Stock throttle bodies are capable of 1500+ hp. No reason to change it

I’ve debated a larger TB myself. But if stock TBs work perfectly fine for 1500hp, why is there a marker for aftermarket? Does aftermarket really have any added performance over stock?

[FasNuf]

Originally Posted by jnmn

Stock throttle bodies are capable of 1500+ hp. No reason to change it

There are HP gains to be had on highly modified engines that use larger intakes and larger TB's. Most notably on boosted engines.
$ to hp ratio may leave you wanting to spend that money in other places first.

[Drew2]

I have a 2013 L99 that I have a 3.0L Whipple I just put on a couple months ago and was thinking about putting a 103mm on. Any educated opinions??

[larry_g]

Originally Posted by Drew2

I have a 2013 L99 that I have a 3.0L Whipple I just put on a couple months ago and was thinking about putting a 103mm on. Any educated opinions??

Draw through systems like the Whipple do well with larger throttle bodies. Once I got to the mid 700 hp range it turned out the ported stock throttle body was my limiting factor. I picked up something like 40 hp going to a 103.

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[1JEWLDSSRS]

Originally Posted by larry_g

Draw through systems like the Whipple do well with larger throttle bodies. Once I got to the mid 700 hp range it turned out the ported stock throttle body was my limiting factor. I picked up something like 40 hp going to a 103.

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Hey there Larry, glad that worked so well for you!! Nice gains for just a TB... Kinda wished I would have just kept it and used it on my LOD just to see what it would do for my setup, but glad it worked well for yours.