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-   -   421 SD Bathtub intake (https://forums.maxperformanceinc.com/forums/showthread.php?t=845557)

tom s 02-02-2023 11:41 AM

There is a early intake ready to ship right now and castings are on hand to machine with shipping being about 2 weeks.Contact me or John direct.Tom

433lemans 04-18-2023 10:30 PM

Tom, are there any more late intakes available?

tom s 04-18-2023 10:57 PM

Yes they are,machined to order.No more early availability.Tom

ANDYA 04-19-2023 08:07 AM

Tom, out of curiosity, what is the total number of intakes made?

tom s 04-19-2023 09:22 AM

I think low 40s shipped.John has late castings available to machine.Could possibly be the last run.The foundry needs a large quantity to cast.Tom

JSuchma 04-19-2023 07:39 PM

Tom, when all is said and done, could give us a total breakdown of the early and late designs.

tom s 04-19-2023 08:08 PM

Will check with John.I think it was like 3-1 late to early.Tom

JSuchma 04-20-2023 07:44 PM

Thanks again Tom, without you and John this would just be a Pontiac dream!

tom s 07-01-2023 10:52 PM

Late style available!Tom

mgarblik 07-02-2023 08:26 AM

Just thought I would drop a note on here. I have driven my 62 Catalina with the new bathtub intake about 800 miles now. If anyone is on the fence with concerns about street manners, rest assured, this version of the bathtub has excellent street manners. My engine will idle at 1000 RPM's for as long as you like, rock solid, no loading up. I have been caught in construction traffic for 45 minutes at a time, smooth as silk. Off idle, very snappy. Tire shredding power at WOT. Draws quite a bit of attention at car shows. If you plan to run air cleaners, you can PM me about the fitment on a 62 at least. If you always wanted one, this may be your last chance. Super high quality piece. BTW, I have a pretty big solid lifter cam in my engine. 13.5" of vacuum at 1000 RPM. I am confident with a milder cam, this intake would idle right down to whatever speed you like.

sdbob 07-02-2023 08:50 AM

Thanks Mike. Im working on 63 Lemans car slowly. Going to look at Norwalk for linkages and air cleaners, ideas. 455 dport RAIV cam.

ANDYA 07-02-2023 05:50 PM

I haven’t done anything with my bathtub yet( late style) as I’m finishing up a 455 project for my 70 GTO convertible. The bathtub eventually will be going into a 65 GTO. Looking forward to Ohio in a few weeks hoping to see some running bathtubs. Would love to see what others have done. BTW, I showed Nunzi my manifold. He was impressed by the quality of the casting. He said the design on the manifold looked good for making power.

beemergary 07-02-2023 06:30 PM

Quote:

Originally Posted by sdbob (Post 6437347)
Thanks Mike. Im working on 63 Lemans car slowly. Going to look at Norwalk for linkages and air cleaners, ideas. 455 dport RAIV cam.

I have one on my 63 Tempest 421SD North end of pits and car parked with Little Indians Sat. and racing on sunday.

tom s 07-02-2023 06:44 PM

John has 2 machined and ready to ship.One is already spoken for.Tom

rolling money pits 07-02-2023 07:32 PM

This was/is an interesting project…kudos to you for taking it on and seeing it through.

Buddy of mine has a small foundry here in town( aluminum/bronze, no CI ) and I help him out every so often. Been a real learning experience with casting and all that’s involved, from idea to breaking a piece out.

Patterns can cost a fortune, and what pattern makers can do with wood, plastic, steel, and various other materials is impressive. 3D printers make cool things as well.

I’ve got a few things I’m going to try and mold/cast myself, should be interesting my pattern making ability.

tom s 08-07-2023 10:56 PM

I think John has 3 late casting ready for machined.No clue how long it will take to get another run done!At this time no plans to make another run of early intakes.Pm if interested.Tom

tom s 12-19-2023 10:41 PM

Sold out!

4zpeed 12-19-2023 10:57 PM

Early and late?


Frank


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