X51 throttle body vs. non X51 throttle body

[Dave07997S]

Is the bolt pattern the same and just the throttle opening is larger, anyone know?

Dave

[phillipj]

I believe it is larger

[Dave07997S]

I believe it is larger

I know the opening is larger..just wondering if the bolt pattern is the same.

Dave

[Loren]

I am pretty sure the bolt patterns line up on 997S but not normal 997's.

You should read the lengthy discussion here.

[Dave07997S]

I am pretty sure the bolt patterns line up on 997S but not normal 997's.

You should read the lengthy discussion here.

Thanks Loren..I was involved with that discussion. However it never was fully understood why the X51 throttle body was incompatible. If it's just the opening is larger than that can be changed. I was hoping one of the techs who are ont his site and maybe installed a X51package what is the difference.

[phillipj]

Dave,

If you read the link that Loren gave you I think all of your questions will be answered. It talks about intake manifolds, Plenums and a custom machining option to make the X 51 TB fit.

Oh sorry I see you were in that thread already.. My apologies

Edited June 4, 2009 by phillipj

[Dave07997S]

Dave,

If you read the link that Loren gave you I think all of your questions will be answered. It talks about intake manifolds, Plenums and a custom machining option to make the X 51 TB fit.

Oh sorry I see you were in that thread already.. My apologies

Yea Wanyne mentioned machining, but machining what. A new bolt pattern, larger throttle area (this is a given). RSS wants $300 to machine a plenum. That's kind of outlandish. Maybe I can do it myself.

Dave

[dndodd]

Dave,

If you read the link that Loren gave you I think all of your questions will be answered. It talks about intake manifolds, Plenums and a custom machining option to make the X 51 TB fit.

Oh sorry I see you were in that thread already.. My apologies

Yea Wanyne mentioned machining, but machining what. A new bolt pattern, larger throttle area (this is a given). RSS wants $300 to machine a plenum. That's kind of outlandish. Maybe I can do it myself.

Dave

Dave,

I think they would have to machine one of their plenum's. Not only for the four ne mounting holes but the opening is 4-6MM bigger too.

The stock Plastic Plenum would not work.

David

[dndodd]

Dave,

If you read the link that Loren gave you I think all of your questions will be answered. It talks about intake manifolds, Plenums and a custom machining option to make the X 51 TB fit.

Oh sorry I see you were in that thread already.. My apologies

Yea Wanyne mentioned machining, but machining what. A new bolt pattern, larger throttle area (this is a given). RSS wants $300 to machine a plenum. That's kind of outlandish. Maybe I can do it myself.

Dave

Dave,

I think they would have to machine one of their plenum's. Not only for the four ne mounting holes but the opening is 4-6MM bigger too.

The stock Plastic Plenum would not work.

David

OOPS!! checked the other thread you knew all that. I should have known better I have seen many of your posts before. I think we have even exchanged e-mails.

Edited June 10, 2009 by dndodd

[Dave07997S]

Dave,

If you read the link that Loren gave you I think all of your questions will be answered. It talks about intake manifolds, Plenums and a custom machining option to make the X 51 TB fit.

Oh sorry I see you were in that thread already.. My apologies

Yea Wanyne mentioned machining, but machining what. A new bolt pattern, larger throttle area (this is a given). RSS wants $300 to machine a plenum. That's kind of outlandish. Maybe I can do it myself.

Dave

Dave,

I think they would have to machine one of their plenum's. Not only for the four ne mounting holes but the opening is 4-6MM bigger too.

The stock Plastic Plenum would not work.

David

Thanks Dave,

I knew the OEM plastic plenum wouldn't work, but just how much work would it be to machine the RSS piece. I may drive down to RSS as Greg says he has a 997 X51 throttle body there so I can see.

Dave

[dndodd]

Dave,

If you read the link that Loren gave you I think all of your questions will be answered. It talks about intake manifolds, Plenums and a custom machining option to make the X 51 TB fit.

Oh sorry I see you were in that thread already.. My apologies

Yea Wanyne mentioned machining, but machining what. A new bolt pattern, larger throttle area (this is a given). RSS wants $300 to machine a plenum. That's kind of outlandish. Maybe I can do it myself.

Dave

Dave,

I think they would have to machine one of their plenum's. Not only for the four ne mounting holes but the opening is 4-6MM bigger too.

The stock Plastic Plenum would not work.

Let me know the results.

ddodd100@charter.net

David

Thanks Dave,

I knew the OEM plastic plenum wouldn't work, but just how much work would it be to machine the RSS piece. I may drive down to RSS as Greg says he has a 997 X51 throttle body there so I can see.

Dave