S650 Manifold Twin 80mm TB map based on S550

[Strokerswild]

Interesting.

Wonder how a Gen 2 would respond....

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[GregO]

Interesting.

Wonder how a Gen 2 would respond....

Very well IMO.

 

[Blackedoutdreams]

This is the latest I've seen.

 

[GregO]

Nice !
Would be interesting to see GT350 IM ZR1 95mm TB

 

[K4fxd]

Nice !
Would be interesting to see GT350 IM ZR1 95mm TB

I'd love to see the CJ vs 24.

The GT350 will be slightly less than the 24 up top IMO.

 

[GregO]

The GT350 will be slightly less than the 24 up top IMO.

GT350 w/87mm TB or ZR1 95mm TB ?

 

[K4fxd]

GT350 w/87mm TB or ZR1 95mm ?

I'd say both due to inlet opening size. Ported who knows. I'm still thinking 2 or 3 Kpa.

I will say I'm surprised. I thought the 24 swap was going to be cosmetic only. 40 HP is a lot. I'd like to have the trace to check avg over the usable curve.

And a critic as always,, Why Why WHY use MPH instead of engine RPM??????

 

[EFI]

This is the latest I've seen.

Those results make sense, and seem to be similar to what the gains are from a 15 to 18 manifold eg. mainly up top.

 

[GregO]

@Wengerd Performance
Thanks for posting this project on M6G. I’m not on FB much so I’d be missing most of your information.

 

[robvas]

Yea, nice to see people doing the work and sharing the results. Would have liked to seen the 18 with a different TB

 

[Wengerd Performance]

Here is where it gets interesting. Take a look at KPA on the 18 mani vs 24 mani at 7700rpm. I agree we do need to try another larger tb and see when the 18 inlet becomes the restriction

 

[engineermike]

I still believe the dual tb’s are largely marketing. The gt350 has a single 87 and gt500 makes 760 hp on a single 92. Are we saying the 500 hp engine needs 50% more flow area than the 760 hp engine? I believe they could have accomplished the same result with a larger single.

 

[Wengerd Performance]

I still believe the dual tb’s are largely marketing. The gt350 has a single 87 and gt500 makes 760 hp on a single 92. Are we saying the 500 hp engine needs 50% more flow area than the 760 hp engine? I believe they could have accomplished the same result with a larger single. I think the gains seen are probably due to some high rpm dynamic acoustic issue they worked out.

If you look at kpa in the screenshots i posted you will see whats happening

 

[Strokerswild]

Flow harmonics?

I recall reading about this (assuming I'm referring to the proper term, that is harmonics) back in the early '90s doing my senior engineering project on cylinder head airflow. Different orders of magnitude within an intake tract or some such, affecting ram effect and VE.

The memory bank is a little fuzzy 30+ years on....

 

[GregO]

For reference only;
https://www.mustang6g.com/forums/th...r-throttle-body-necessary.133789/post-2759838

https://www.mustang6g.com/forums/th...r-throttle-body-necessary.133789/post-2759846

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