#21  
Old 07-21-2021, 01:39 PM
Nobuddy Nobuddy is offline
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I have one of the Speedmaster/Procomp intakes with the injector bosses machined if anyone wants to see pictures. Seems to be a copy of the modified Holley Street Dominator like the Hurricane in the Butler link. Looks like it can be port matched to RAIV or SD.

Barry

  #22  
Old 07-21-2021, 01:57 PM
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Post up pictures, no need to ask first.

Tom V.

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If you are Talking, You are not "Listening", you can only LEARN by LISTENING. LLM
  #23  
Old 07-21-2021, 02:46 PM
maxpowerta maxpowerta is offline
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The speedmaster is cheap as chips and fits great under a shaker.
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Old 07-21-2021, 03:53 PM
Steve C. Steve C. is offline
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In 2005 Ken at Pacific Performance Racing in conjunction with Professional Products introduced the Tomahawk intake manifold, which is essentially a modern interpretation of the original Holley Street Dominator intake with some minor enhancements. It was patterned after a Holley Street Dominator intake modified by Dave Bischopp for PPR. Later there was a falling out between PPR and Professional Products. Since then the intake has been sold under several different names and some versions with slight deviations. One example, as with one Speedmaster model that has the fuel injector ports drilled.


.

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'70 TA / 505 cid / same engine but revised ( previous best 10.63 at 127.05 )
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http://www.hotrod.com/articles/0712p...tiac-trans-am/

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https://www.youtube.com/watch?v=qDoJnIP3HgE

Last edited by Steve C.; 07-21-2021 at 04:00 PM.
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  #25  
Old 07-21-2021, 09:57 PM
Nobuddy Nobuddy is offline
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Default Speedmaster/ProComp manifold

Couple of basic pics. Plenum is pretty ugly but rest looks OK to me. That is a felpro 1233 gasket just lined up on the bolt holes.

Barry
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  #26  
Old 07-21-2021, 10:10 PM
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At Holley Engineering, they used a RA-IV Pontiac intake (1969 I believe) ported by Booth & Aarons and designed the Holley Street Dominator intake to flow approximately 3 percent better vs that modified RA-IV intake.
Their goal was to just advertise a Holley intake/ carb that actually flowed slightly better than the RA-IV / Rochester carb did.

So it was NOT designed to royally kick butt on the factory part.
Doug Nash did work for Pontiac Engineering and the Nash Intake was developed for Herb Adams 366 engine for Trans Am racing. Again, the Nash intake needed mods to work properly with the larger Pontiac 455 engines. (Mostly in the Plenum Volume.)

Tom V.

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Barney Navarro (Engineer, Fabricator, Machinist,
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If you are Talking, You are not "Listening", you can only LEARN by LISTENING. LLM
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  #27  
Old 07-21-2021, 10:58 PM
Steve C. Steve C. is offline
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The Tomahawk was designed by PPR to meet the Street/Strip needs of a broad market segment for owners of Pontiacs with an intake that will fit under the hood and feed 300 cfm cylinder heads.

As can be seen the Tomahawk intake will port match to the FelPro 1233 intake gasket with no issues. As cast it's port exit dimensions are actually small and was done for marketing to allow the intake to work on unported factory heads.
If necessary it can go to 2.300" tall ports without welding. However if done so there is not much material to seal at that height, about 1/8" or so.

.

__________________
'70 TA / 505 cid / same engine but revised ( previous best 10.63 at 127.05 )
Old information here:
http://www.hotrod.com/articles/0712p...tiac-trans-am/

Sponsor of the world's fastest Pontiac powered Ford Fairmont (engine)
5.14 at 140 mph (1/8 mile) , true 10.5 tire, stock type suspension
https://www.youtube.com/watch?v=qDoJnIP3HgE

Last edited by Steve C.; 07-21-2021 at 11:15 PM.
  #28  
Old 07-21-2021, 11:24 PM
Dragncar Dragncar is offline
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A Tomahawk ran 11 flat on my 455. The one I have had some work done by SD. But the Warrior ran over 1.5 tenths quicker. Some plenum work and 2" of spacer.

  #29  
Old 07-21-2021, 11:31 PM
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65madgoat 65madgoat is offline
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https://www.edelbrock.com/torker-ii-...old-50565.html

Torker 2 EFI manifold being used with soon to be released Fitech rails -- and yes you need to space the throttle body up 1" to clear fuel rails. Saw this online:

https://www.instagram.com/p/CRO5iY6DtLh/
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