5.7 throttle body on 3.6

[Sasquash]

So I'm sitting under a forest fire smoke cloud. The air quality scale that tops out at 500 but we hit 803 today so I got nothing to do today but good around online. Anyway I found a kit to put a 5.7 throttle body onto the 3.6 intake. They are claiming 20 HP gain but I'm not sure. Has anybody tried this yet?

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[PsychoTrucker81]

Not even 260(roughly 60in/liter).

 

[rubileon]

People put on all kinds of abominable aftermarket intakes... could this cause that much of a problem? It's surely not as severe as forced induction and you get people operating the engines at low rpms with superchargers fitted and no tunes (for testing at least). I think the ECU will learn and compensate.

Not saying there will be gains though.

 

[CarbonSteel]

Not even 260(roughly 60in/liter).

220 CI and 285 HP = 1.3HP per CI

 

[CarbonSteel]

When looking at different air filters, I found an article (I will try to find it again) that stated the OEM air box and filter out flowed the requirements of the engine by a VERY wide margin. Based upon that, I find it difficult to believe that a new CAI or throttle body would improve anything.

 

[Sasquash]

I play in sand dunes, I do a fair amount of 2nd gear wide open throttle stuff. Even with the 6 speed the motor is lacking in the high end. Like I said, it was a curiosity I stumbled onto. I'll go back to saving my pennies for a supercharger. Thanks for the replies.

 

[DaltonGang]

I play in sand dunes, I do a fair amount of 2nd gear wide open throttle stuff. Even with the 6 speed the motor is lacking in the high end. Like I said, it was a curiosity I stumbled onto. I'll go back to saving my pennies for a supercharger. Thanks for the replies.

Or, you could save you pennies and put an entire 5.7 engine in, instead of a supercharger.

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[AnnDee4444]

I don't have any experience with the 3.6 or 5.7, but I do know that many modern tunes use a combination of the TPS & MAP (or MAF) sensors to calculate the amount of airflow being delivered to the engine based off of the VE table. A larger bore throttle body would allow more air to pass at lower throttle angles, which would cause a lean condition. Other ECUs I have messed with have a maximum percentage that they can richen the AFR (usually 10%-15%). This is also assuming that the 3.6 & 5.7 use the same sensor voltage range.

A tune would probably be needed to get this working properly (correcting the VE table at a minimum). While it may be possible to gain HP, you could also end up losing low speed throttle resolution.

*Edited for clarity

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