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  #41  
Old 06-12-2022, 11:06 AM
mgarblik mgarblik is offline
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I have a little feedback on fitting the bathtub intake to my engine. This is NOT intended as a post to complain about ANYTHING on this intake. I did a final fitment of the lower intake yesterday. It's a beautiful casting, with lots of material available for fitment. My application is late style, Edelbrock CNC ported, D port heads. Stock block, deck cut to zero, .-002". The lower intake casting was a close fit, but not a direct bolt-on. On a 50+ year old block, with aftermarket heads, you just can't expect that or get that with ANY intake. I had a tight fit on a few bolt holes, especially the front 2 on the water crossover holes. I lightly polished the remaining 8 mounting holes with a cartridge roll, removing about .005" The front 2 holes I carefully ran a 31/64 th drill bit through removing about .015" from each hole. Then I used a cartridge roll to gently open the hole to the rear an additional .010" That gave me excellent clearance to start all the bolts. As you all know, all the bolt holes must have enough clearance to allow the manifold to pull forward and crush the rubber O-ring to the timing case, always a leak point. The only other modification I had to make was cutting a little clearance in the timing case for a nice, straight shot for the long pull-in bolt through the timing cover for the O-ring. Not sure if there was casting flash in the way on the timing case, or if the threaded hole in the intake was off a few thousanths, but you don't want any interference between the timing case slot and the bolt. Finally, for those buying the aluminum thermostat housing from Ames: It is a pretty lousy piece, IMO. It can be made to work, but mine had 2 time consuming issues to deal with. First, the mounting pad was very poorly machined and was not even close to flat. Measured on a surface plate, it had almost .030" warpage and would have leaked for sure. Spent about 1/2 hour with 280 paper and a surface plate sanding it flat. Second, inside the neck, there was a huge pile of aluminum slag blocking about 25-30% of the flow area inside. Spend a bunch of time with a die grinder and a carbide bit chopping all that crap out so coolant could flow smoothly through it. So look carefully inside if you buy one of these. Port alignment on the new intake is just great. I had to do nothing at all on any of the runners. Fantastic job guys!

  #42  
Old 06-12-2022, 11:24 AM
tom s tom s is offline
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Thanks Mike,as everyone knows these were scanned to fit both of my engines.We did not know how much my heads or blocks had been decked.Tom

  #43  
Old 06-12-2022, 11:40 AM
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Having bought current manufacture aluminum tripower water necks for years from various vendors I can say that the surface where the neck bolts to the intake not being flat, and there being slag or casting sand blocking the passage inside the neck, can be a common thing. I just hold the mounting surface on a table top belt sander for a second or two and that usually fixes the mounting surface. A screw driver removes casting sand and a die grinder, as Mike said, may be necessary for slag.

  #44  
Old 06-13-2022, 07:47 PM
mgarblik mgarblik is offline
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I began the final steps to do a permanent install on my new bathtub manifold base. To match up properly and produce the best power from my CNC ported Edelbrock heads, the roof of the bathtub intake needs to be raised substantially. Thankfully, Toms original design and subsequent revisions allow for this by having lots of material in the of the port! Almost 1/2" of aluminum available . I needed to raise the port about .250", so very much appreciated. Look how nice the as-cast port alignment is. Compare that to the reproduction Ram Air IV/455 HO intakes. Most of them need substantial welding to just be usable. Not to mention that is a super easy manifold to make compared to this 2-piece factory tunnel Ram. I have about 4-5 hours of grinding to do the other 7 ports, then it's final wash and install. Thanks again for a really nice piece.
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  #45  
Old 06-13-2022, 07:57 PM
tom s tom s is offline
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The donor intake was a early style with a 2.100 opening.Jon Schmidt did the computer magic to relocate the ports to the late style.We all thought better to take out material than have to fill in.Tom

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  #46  
Old 06-13-2022, 08:16 PM
mgarblik mgarblik is offline
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Quote:
Originally Posted by tom s View Post
The donor intake was a early style with a 2.100 opening.Jon Schmidt did the computer magic to relocate the ports to the late style.We all thought better to take out material than have to fill in.Tom
Absolutely, I have welded up Wenzler and Offenhauser intakes to raise the ports. It's a ton of work, not to mention it looks terrible when done. When this is installed, the only people who will know about the tall ports are the PY forum folks.

  #47  
Old 06-13-2022, 11:40 PM
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Quote:
Originally Posted by mgarblik View Post
The only people who will know about the tall ports are the PY forum folks.




Frank

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  #48  
Old 06-15-2022, 07:47 AM
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Not sure if these pics will help but I believe this intake will
Clear an early Firebird hood. Pic shows performer rpm and Holley that a standard 400 air cleaner fits fine under hood. Also placed tunnel ram and a Holley 650 with a 1” spacer (no air cleaner) and out some
Foil in the air horn. Hood shut but did compress the foil to about 1/2” or so.
My plan and hope is that the Holley efi will not require a spacer and I will gain that 1” back or atleast
Some
Of it. This is a. Standard non 400 hood.
Observations: 69 alternator bracketry may not allow alternator to clear front of flange without trimming of manifold. And the water neck bracket location obviously will not be available
Large base distributors will definitely NOT fit, I have an hei body on This motor currently but will
Switch to standard smaller body when time comes,
I only tried to thread one bolt in to make sure manifold was in right position for the pictures. I may fiddle around with it when motor goes back in. I had a roller
Lifter fail so pulled motor to clean it up and the photo op was available

These are not complaints only observations
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  #49  
Old 06-15-2022, 09:43 AM
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Good pictures. Cut the crossover off and use a late model water crossover instead?

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1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever!
1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand
1965 GTO 4 barrel 3 speed project
2004 GTO Pulse Red stock motor computer tune 13.43@103.4
1964 Impala SS 409/470ci 600 HP stroker project
1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs
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  #50  
Old 06-15-2022, 09:57 AM
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You might be able to use a little longer alt belt and move it away enough.When I get around to it,im moving my alt to the pass side to clear some room on that side.Already have it setup with I think a 64 power steering bracket and a 63 Tempest alt bracket just been too busy to make the change.Mounted it all on a 69 engine I had sitting in my garage.FWIW,Tom

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  #51  
Old 06-15-2022, 10:25 AM
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Quote:
Originally Posted by Skip Fix View Post
Good pictures. Cut the crossover off and use a late model water crossover instead?
its crossed my mind too, but every thing else will be considered before i cut this intake up lol

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  #52  
Old 06-15-2022, 04:17 PM
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What is the spacing between front/rear carb stud holes? You going AFB or Holleys?

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1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever!
1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand
1965 GTO 4 barrel 3 speed project
2004 GTO Pulse Red stock motor computer tune 13.43@103.4
1964 Impala SS 409/470ci 600 HP stroker project
1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs
  #53  
Old 06-15-2022, 04:24 PM
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im going to try and fit dual holley efi. looks like it will fit to me. i have a summit link a few posts back. Havent ordered yet as there is a few things to do before i switch it to efi
https://www.holley.com/products/fuel.../parts/550-527

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1972 Maverick under slow construction
  #54  
Old 06-15-2022, 04:30 PM
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Wondering about 4150s or 4160s.

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1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever!
1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand
1965 GTO 4 barrel 3 speed project
2004 GTO Pulse Red stock motor computer tune 13.43@103.4
1964 Impala SS 409/470ci 600 HP stroker project
1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs
  #55  
Old 06-15-2022, 04:42 PM
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oh they will not fit without some adapters at minimum from what i saw. i laid the 650 and another 750 on it and put the second back in the drawer for the pics as it was not going to happen just too wide/long maybe some sideways action with some creativity.

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  #56  
Old 06-15-2022, 05:47 PM
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ANYTHING but a AFB will require a adapter!There goes hood clearance!Tom

  #57  
Old 06-15-2022, 05:54 PM
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Quote:
Originally Posted by tom s View Post
ANYTHING but a AFB will require a adapter!There goes hood clearance!Tom
this will fit, has both bolt patterns and i think there is a lot more spacing on your intake than this one.
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1972 Maverick under slow construction
  #58  
Old 06-15-2022, 06:21 PM
tom s tom s is offline
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Let us know when you confirm.E AFBs have both pattern also.Its the room in between that can be a deal breaker!Tom

  #59  
Old 06-15-2022, 07:06 PM
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Warrior/Nash 3.5 apart -4150s close. 409 Eddy and factory dual quad 7/8. Center squirters(or vacuum secondary with dashpots off) with secondary shaft trimmed fit sideways, AFB bases almost touching.

NHRA would no go for all that rubber line now!
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Skip Fix
1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever!
1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand
1965 GTO 4 barrel 3 speed project
2004 GTO Pulse Red stock motor computer tune 13.43@103.4
1964 Impala SS 409/470ci 600 HP stroker project
1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs
  #60  
Old 06-15-2022, 07:44 PM
tom s tom s is offline
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Center squirters will fit with adapters!My intake was running them.I still have the adapters that were on the intake when I bought it.Tom

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