Sedan tri-y header

[modok]

while car was on stands, I took some pictures for you

[bugguy1967]

Did you make that? Can you explain the advantages? What size tubing?
_________________
"A petrol engine can start readily, run smoothly and give every appearance of being in good order, without necessarily being in good tune." - Colin Campbell, "The Sportscar Engine"

[ralf]

awesome work man...

clever lay out. its always hard to figure out a "lay out" with that kind of pairing

bugguy1967, the pairing is to equally space each cylinder in accordance to firing order/rotation
_________________
Flow Through a Curved Conduit

porting my SP head for my brother's project
https://youtu.be/OS_mVjQuqgk

[modok]

Short story is I "re-discovered" the tri-y several years ago. I built one in a "baha" layout and tried a dozen or so small design changes, figured out somewhat how it tunes and so forth.

Then figured out this layout that fits behind the apron. I built the muffler also. It sounds like vintage porsche guys wish they sounded

Some parts are plain, some were ceramic coated, and some are aluminumized. It's clear which one is proving more durable

[Altema]

[Altema]

[modok]

it is only a 2007cc. 1.5 primaries and 1.75 secondaries.

Tangerine racing's one for the 356 and Tencentlife's vanagon tri-y are the only "commercial" systems I am aware of that have any resemblance
(that is, they fit the type-1 port layout). My tube layout is unique. It's kind of like a "45 winder". I found merging the primaries at about 45 degrees, and then turning another 45 in the secondaries was the only way to keep it behind the apron. The bend under the oil filter then must be extra tight, but one tight bend is a small price to pay.
This would work for more conventional four into one headers also, to allow shorter primary tube lengths than the sidewinder designs.

[bugguy1967]

I never understood how header fabricators make equal length tubing without wasting a lot of material to get it right.

Do you pre-measure the first pipe before you bend, and then make the rest work at that same length?

I'd need a mile of tubing before I got one right myself.
_________________
"A petrol engine can start readily, run smoothly and give every appearance of being in good order, without necessarily being in good tune." - Colin Campbell, "The Sportscar Engine"

[ALB]

[juki48]

Glad I'm not the only one...

[jhoefer]

[58 Plastic Tub]

Glen-

I've been waiting for years for somebody to do this. Want to make me one?
_________________
Stan Galat
"Everybody is entitled to their own opinions, but not their own facts."

[Howard 111]

Watch that "only a 2007" Glen. That's what I run.

Nicely designed!


.

[youngnstudly]

Tell us more about the muffler (if you don't mind). I'm just as curious about that as I am the rest of the setup!
_________________
The economy is in a state of disaster, we have NO time for common sense!

[theastronaut]

Carb bump? There's only one...

Would love to hear how that sounds, and I'm really thinking about a tri-y for the 2276 since you've been posting about them.
_________________
Strive for perfection in everything. Take the best that exist and make it better. If it doesn't exist, create it. Accept nothing nearly right or good enough."
-Sir Henry Royce, co-founder of Rolls-Royce

'64 Beetle Sunroof OG Bahama Blue
'63 Beetle Vert
'66 Beetle
'88 Festiva L
'89 Festiva L
'64 Chevy C10
'66 Chevy C10

[juki48]

x2 I was just thinking the same thing, would love to hear it!

[ralf]

the other cool thing about is is

an oilsump would fit and it doesnt look to be hampering ground clearance at all
_________________
Flow Through a Curved Conduit

porting my SP head for my brother's project
https://youtu.be/OS_mVjQuqgk

[esde]

I've installed tri-y headers on other engines, and the improved performance was extremely noticeable. Especially so with the Toyota 2f engine. I've been waiting to see one for an aircooled VW. Very, very nice work Glenn.

[modok]

Exactly. I had a merged bugpack header on this car for two years with a hideaway muffler, and the darn thing scraped on the ground all the time and really cramped my style.
This setup has not hit the ground yet! And adding the 26mm torsion bars has really transformed it too! I should have done that from the start!

The bulge in the decklid is to clear the aircleaner, I am using the CB big beef manifolds and they do not have any offset, so only the right side needs a bump.

[modok]

This week I will try to get my buddy to lend me a nice microphone to do a proper recording of the sound.

The muffler is very simple, inside is divided into three chambers. The tailpipe tube is 2" and perforated with 1/4 holes..... a lot of them, I forget how many but more than the area of the tube, and this runs through all three chambers.
The inlet runs through the first chamber as a perforated tube, then ends in the second, and there is a hole in front of it into the third chamber, (exactly like a flo-pro muffler).

I had a magnaflow glasspack on it at first but it had some VERY bad droning, enough that it actually upset the tuning