Tech question 49mm FS intake manifolds

[orangefinger]

So i ran across a somewhat weird combo of parts and like to get some input.

We have dual 49mm full specs and previously ran on 90RR which the intake manifold is specific to this engine.

The current intake manifold / adaptor plate has no bottom throttle pick up as we as only measures 47,40 mm...

That being in place my questions now are as follows, which manifold or adaptor plate is this ?

Should the opening for the intake manifold not equaly be 49m like the carbs ?

If I order a new Boyesen intake manifold with adaptor plate are these automatically 49mm 's ? ( the come with the bottom throttle pick up )

and last but not least is there a bottom throttle pick up adaptor plate for this current set up ?

Thank you for any advise, and if you have the correct parts for sale let me know.

 

[Proformance1]

Put up a photo of the manifold also. Thats not a Boyesen carb mounting plate. Looks like a PHP manifold. If you notice the FS 49s measure 49 at top, but not at adapter ring.

 

[JetManiac]

Put up a photo of the manifold also. Thats not a Boyesen carb mounting plate. Looks like a PHP manifold. If you notice the FS 49s measure 49 at top, but not at adapter ring.

That is what I was thinking, measure carbs at base. PHP mani doesn't have plates that color?

 

[zzylstra]

I think he is asking about the 900rr xscream intake manifold, he is wondering if the boyeson manifold he plans on purchasing will measure the same


Sent from my iPhone using Tapatalk

 

[zzylstra]

@orangefinger if that is the setup off Kelly's 900rr then that is a specific intake manifold setup for that engine, I have many assumptions as to why they use and recommend their own intake manifold/reeds for their engines. Your carbs will need to be removed from the pictured plate, and installed on the boyeson plate. If your wondering wether the bore measurement will match, it will since the boyeson manifold was actually designed to work with the full spectrums. I assume along with the rest of the hurricane crew you are installing a tpe 900, so any of the 2 manifolds (boyeson, php) will do what you want


Sent from my iPhone using Tapatalk