The Millennium pipe future (aka Moto Carrera pipes)

[GRA2STROKES]

They will be a round silencer and will come in 2 lengths. I figure an option would be a great thing to to have.

Garrett

[pdxjim]

[pdxjim]

[GRA2STROKES]

Thanks Jim. I'm probably the most computer illiterate young person you'll ever meet. Anyway here's what I have been up to.

Garrett

[SoCal250]

    

[Dvsrd]

Nice!
What kind of powerband is to be expected on a non-ported 350?  Power dropping off before any major mayhem occurs?

[quocle603]

Thanks Jim. I'm probably the most computer illiterate young person you'll ever meet. Anyway here's what I have been up to.

Garrett

team work makes everyone happy!!

[GRA2STROKES]

Nice!
What kind of powerband is to be expected on a non-ported 350?  Power dropping off before any major mayhem occurs?

I ran these pipes on a stock ported 350 with cut heads and 30mmcarbs and had A solid 5500-9500 power band.

Garrett

[GRA2STROKES]

So I got my quote back and I was pretty blown away at cost. It was going to be $385 per set in machined parts. That's a total of 10 machined pieces per set of pipes. I have decided to use the burned flanges and a piece of 1-1/2 od tubing. The pieces welded on to the pipe will still be machined and seal with o rings. The tubing is surprisingly round and with work fine as well as be substantially cheaper. I believe it will still tied a high quality pipe at an affordable cost. Still shooting for 599-649 range.

Garrett

[m in sc]

 

[Dvsrd]

Looks good!
However, I do wonder if the machining cost would be lower if the o-ring grooves were on the spigot, and the piece welded to the pipe was just a piece of larger tubing, or a straight bushing?
Just seems easier to cut grooves on OD, rather than ID.

[teazer]

I really like that TZ style design with twin O rings but it's an expensive way to do things unless you are set up with a CNC lathe. 

Single external O ring suggested by Dvsrd might reduce cost a bit.  Check out the Jim Lomas design for a simple version of single external O ring.

On my RD drag race pipe I was able to use some chopped down TZ "headers, but for production, costs need to be low.

[GRA2STROKES]

Actually the piece with the o ring grooves is not bad price wise even with a lower quantity of 20.

Yes I see how loomas does it but that sealing actually sucks. Owned a few sets and his flanges suck. I wanted to do better than that. I'll get some more picture up tomorrow for what I came up with.

Garrett

[pdxjim]

Tyga silencers are only $50 each retail.

They'd probably cut you a bulk/wholesale deal and sell em to you without the nameplate if you ask nice 🤷🏻‍♂️

[Clem]

Having more of a dirt background, I'd say check out how pro circuitdoes there flanges. I never had issues with the head pipe sealing until I met my first RD. 😂

https://express.google.com/u/0/product/7282435543945003936_823300960269045748_3103314?utm_source=google_shopping&utm_medium=tu_cu&utm_content=eid-lsjeuxoeqt&gtim=CMaP-IGMhICdgAEQkNy2vqSk57fyARig5LMRIgNVU0Qo8OKM5wUw0rS9AQ&utm_campaign=3103314&gclid=Cj0KCQjwn8_mBRCLARIsAKxi0GKoOWHYtzy4AX6gF2n2Wn0Ux9O1gVsdOTUOINqg1dttvavOZFzAopcaAlJFEALw_wcB