Tri Y FBody Header interest 304 stainless
 

Met with a couple companies at the PRI show & threw out the idea of making a run of the Tri Y FBody Headers. Similar to Tribal tubes. Since Ron seems to have stopped making these, perhaps this would be a nice offering. Looking to see interest if these were to be made. They would be 304 Stainless, 3" collector with V band option, All TIG welded, two (2) O2 bungs per side (narrow band & wideband for tuning), 1 3/4 dia primaries. O2 bungs would be placed to clear & still be accessible for 6 speed manual transmissions which are larger than any factory offering in this area. Price point would be on par with good modern muscle headers. These will not be cheap & may be one of the more more expensive header options. At small quantities (<100) sets, the $600 price point is unobtainable. These would be over 1200 but under 1800. Polished would be additional. Port shape based on most interest. They would be snug to the floor for low ride height cars, yet ample clearance so they dont hit the floor.

Depending on design direction, I may go the length of 3D scanning the body/ chassis, powertrain & existing header mock up so the deliverable will be all CAD designed.

I've played with 2nd Gen platform & various driveline configurations for decades. Used cheap 3 tube heads, Dougs, Hookers, Headman, Tribal tubes, modern engine swap headers, ect thus familiar with the nuances of each.

Looking to see if there's enough interest to make the R&D & investment worthwhile to provide a very high quality & excellent fitting piece to the market with reasonable delivery time.

You can email me directly at transam_engineer at yahoo dot com.

Had to break up the email as last time I used in it traditional format I received a few scammers.

Looks like its crickets on this idea. Maybe another time.

I just found this post since I spend most of my time on the Race and Street sections.

I'm intrigued. Making a CAD model and snugging them to the floor is very attractive. Price is reasonable if they are a terrific fit (and you can prove it with CAD model cross-sections) although a lot of the potential customers will balk.

My selfish requests:

Fit around the Canton T-shaped road race pan.
Tuck the right side up and assume that the oil filter has been remotely located.
Round port.

I'd think if you make a CAD model, the price could be significantly reduced by having the tubes CNC bent, rather than all of the usual hand-fitting and welding small pieces together.

Eric

Excellent input!
RH sides always hung low on these. Remote filter assumption will be taken in consideration but not mandatory as that's a small percentage of builds. I know some race applications would like something off the self vs custom made. Would be nice to incorporate all builds, but business decision need to be made also. This has a min. 50k+ initial investment thus need the initial run to capture large audiences. Not sure is CNC tubing is an option due to some of the bend complexities. Looked into CNC tube bending in the past for other projects. Other inputs that would be in consideration. Will review that option though. Drivability & fit vs all out max effort. Obviously, we don't want to sacrifice power , but if it means capturing more audience (street vs drag) , I'm willing to give up a little power. Percentage should be small however. D vs RD port is solely be based on audience again. While I'm an enthusiast, I want to recoup the investment in a reasonable time frame. That is the overall factor as to which version is made. CAD & 3D modeling/ scanning will be utilized for this project.

I’ve copied this thread from the original that was posted in the Lobby: https://forums.maxperformanceinc.com...=1#post6393456

Tri-Y up top is very nice, but i would hope to move the design to be the dual-pair output, like old SD cast aluminum did. see a second part can take the pair to a universal/STD collector, or a equal-pulse header cross-pipe collector.

2:1 merged collector into 3" or 3.5" STd Collector flange.
And the opportunity to cross 1-pipe over to the other side for even-pulse (pulsetrain ) timing.
Such that the 2-4 goes straight to RH Collector. 6-8 crosses over to LH Collector.
And 1-5 goes straight to LH collector. 3-7 crosses over to RH Collector.

If you don't make em, i will make my own.

The Herb Adams TA oil pans were 'short' in the front of the sump so that you could route the pipe configuration you describe, HIS.

You need about 5" of clearance from the front of the oil pan to the cross-member to fit 2 sets of 2" OD pipes in that "alternate space" where the front of the oil pan sump used to be.

Tom V.

My selfish request also... I would be interested but would be after round port flanges with 2" pipes with 3.5" collectors. 68 Firebird.

Tom, if ya haven't already do so, and you remain too curious, map out the exhaust pulses in a timing train; spoiler alert the Tri-Y being key for physical real implementation and pulse order.

Then see how DS and PS are equally satisfied.

For me, the In-pipe exhaust Speed for Primaries still conclude that 29" (port to Collector) is a good compromise for wideband with 1 7//8.

Collector design seems to be keyed to the compression (balance anti-reversion with EGR) and driving application (boost at rpm, i picked my 3900 rpm converter flash)

To be clear, to everyone, seems to me ;

a 304 SS "HO Manifold" format on RH using 1 7/8 tube, and twin outlet is ideal, up top. Long-branch format not so useful as it looks.

Whereas, the LH format could be a blended format between HO and Long-Branch, again with a twin outlet to Collector.

SS 304 parts (itemized to make each side) seem much more affordable than the full kits online.

I have a set of H-O tri-y s in the garage. would you like to borrow them for your project?

Only if they are roundport and 1 7/8.

Last time i fab'd with 1 5/8 and Jeff Kauffman said they were better than any manifolds, but not better than the 1 7/8 or 2" 4-tube headers. If we do this i wonder of Kauffman will dyno them again.

Sorry, Mine are D ports

If 1-7/8" primaries, them a photo of each would aid in grading each side for complexity. Thank you for the idea to offer.
Seems to me the SBC, and 318 mopar are possible low-price tri-y core starts BUT the Ys are not good! They appear good but for me, the Y is a good for noncompressible fluid plumbing like water and lacks consideration for the exhaust pressure-vacuum signaling of the compressible/stretchy EXH.

The BBC, LS are like RA-V cores, and low price for reflanging to RA-V. (Is what i'd do...).

304 Stainless flanges and a few 304 bends makes for a no compromise build-to-design/config. Those parts are affordable to finish the job, but when kitted it is too costly because they assume 4-tube and Quad Collector.

I have a set of H.O. Specialties Tri-Y Roundport headers stuffed away in storage. I haven't seen them in years, but I don't remember the primaries being that large.

The round port H-O Racing Tri-Y headers had 1-3/4 primaries, 2” secondaries and 2-1/2” collectors.

I'd love a set of those for my TA. Was the three bolt collector ring added?

Yes the 3-bolt collector flanges were added on, they originally came without flanges with a slip-on mating piece to weld to your exhaust.

The slip-on with a U-bolt provided better ground clearance than the 3-bolt flange, but nowadays both are inferior to a modern ball flange setup.

I bought those headers from Ron Hildreth (RIP), he added the flanges and then had them coated by Jet Hot. I also had another set that I bought new from Ken Crocie that I used with the slip on collector adapters.

+ R 70 Judge,

Yea, those would be nice to work with. The 1 3/4 could be "close enough!" If it is ID. Not sure if OD. Away from my workdesk notes showing 060 wall stuff and ID OD. May even be nice to borrow awhile as a guide model that doesn't get altered, while building ss 304 flanges, setting pipes "laying" on their side to create a proper angle ( to promote a cut once fitment).

Imagine the 6-8 path inboard, and the 2-4 path outboard.. DS would want the 3-7 inboard, 1-5 outboard. Otherwise reshaped Ys, and some trick on the Sec exit, and past the header.

All exhaust tubing is sized by O.D. not by I.D. so that would make the tubing I.D. of the round port Tri-Ys close to 1-5/8”.