72 k20 project

[burnitg]

Originally Posted by ryanroo

i've found 5" to be a little harder to find. mandrels are out there but fewer places carry 5". for most of the bends and the strait tube sections, i order from Columbia River Mandrel Bends

they have reasonable prices and a good selection. i havent used any of the stainless stuff so i can't comment on that. they have many flanges and clamps as well. i used Amazon to search for the 5" machined v-bands since prices are all over the place and amazon seems to be the easiest way to find the cheaper offering. Burns stainless has a good reputation for quality, with an associated price tag. Reid Washbon racing exhaust has all the goodies in stainless too. i have talked with them. you pay for their stuff as well, but nice people and the product looks great. i will probably use them the next time i build a performance exhaust. they have 621 Inconel mandrels! super bragging rights if you build a TT manifold for a cummins with Inconel.

4" should pose no issues for locating parts. if you are looking for super tight CL bends Reid Washbon carries them in square radius and chassis shop sells the torus donuts in a square CL in 304l, MS and AL.

there is an outfit in denver that i can get the name and number for you if you are interested. they sell the v- band clamps and turbo outlet flanges(Mild Steel) for about half of any of the "performance" outfits online. i would bet they have 4" as well. quick shipping and pretty easy going staff.

Thanks for the info, Ryan. I am interested in the outfit in Denver. We go down there almost every week and I could just pick the parts up.

[burnin oil]

Most big truck parts supply houses carry 5" and larger. Local sourcing of 4" was always more difficult. To small for semis and the likes.

[Dieselwrencher]

Racepartsolutions is another good source for flanges for 4" AND 5" pipes and turbo parts.

[$20071k10]

Ryan not trying to rain on your parade but aren't you concerned about the lag time you exhaust brake will have being that far away for the motor?

[ryanroo]

nope. Pressure is pressure. There is a slightly increased volume to fill, but considering an engine displacing nearly six liters per 2 revolutions it won't take enough time to notice the volume, especially at higher engine speed. It's a pretty common place for these big ones in pick ups. And more importantly, it won't matter, since this is the first place it will reasonably fit. even if there was a notable difference, it will be considerably better than not running one.

[$20071k10]

Very true!

[Dieselwrencher]

Every medium duty truck I've ever worked on that had one was a minimum of 24-36" from the engine. They all worked fine. And like Ryan said, there will be pressure built up. It's like jamming half a potato in there side ways.

[ryanroo]

who was timing me? i think i started on this in november.



finally assembled. 1.375 input and cast iron tailhousing, new counter shaft, new updated main. i am going to be a happy SOB when i finally dont see this on the floor anymore.

[burnin oil]

Originally Posted by ryanroo

i am going to be a happy SOB when i finally dont see this on the floor anymore.

I hear ya there. I have one sitting right outside my door with a 205 next to that. Once I get around to finishing up making the adapter plate it can be installed. Somehow it keeps getting bumped down on the list. Something about the trans waiting to be rebuilt for the wifes car takes priority. I really need a shop!

One more thing. My exhaust brake is mounted back like this also. Its probably 4' back once the down pipe is accounted for and that was as close as I could get it. It works perfectly fine however it does take a second longer to start slowing the truck down over a turbo mount. In actuality it is probably better for the turbo as it gets a little more time to spin down. As said it takes a little longer to fill the pipe volume up but it is not bad at all. Its like adding a larger intercooler.

[ryanroo]

I have that parts everywhere thing too. bigger shop area and some storage will be on my dream list when we decide to get out of the crackerbox row. just enough space to build would be nice. id like to pick my own set up, but anything more spacious will be welcome!

i hacked away at this some.

5" donut







the pair of pants flanged on



from the outside

[Dieselwrencher]

Great work!

[ryanroo]

thanks dude.

here are a few more bits and pieces

these things



go here,



and here



then the fun happens

[Dieselwrencher]

Very nice! I bet you could sell those hangers to quite a few folks!

[mx289]

Originally Posted by Dieselwrencher

Very nice! I bet you could sell those hangers to quite a few folks!

X2.

Very nice work.

[sboris]

Ryan this thing is really gonna be bad %ss. Doesn't seem to be any lack of motivation! Killer job so far!

[woodwright]

Your build is looking nice Ryan. Back on page 52 you mention trailer safety chains. On a flatbed I built a while back, I welded some grade 8 nuts to supports under the deck and the owner bought several forged eye bolts. I welded 7 of them around the exterior of the deck plus the 2 next to his drop ball. That way he had tiedowns everywhere, but still had a flat deck for sheet goods. When he tows his trailer he puts in the center 2 for chain hook points.

[ryanroo]

Originally Posted by Dieselwrencher

Very nice! I bet you could sell those hangers to quite a few folks!

haha. unboxed frame need not apply...

Originally Posted by mx289

X2.

Very nice work.

Thanks Tom!

Originally Posted by sboris

Ryan this thing is really gonna be bad %ss. Doesn't seem to be any lack of motivation! Killer job so far!

Thanks Shawn! some days are more motivated than others...

Originally Posted by woodwright

Your build is looking nice Ryan. Back on page 52 you mention trailer safety chains. On a flatbed I built a while back, I welded some grade 8 nuts to supports under the deck and the owner bought several forged eye bolts. I welded 7 of them around the exterior of the deck plus the 2 next to his drop ball. That way he had tiedowns everywhere, but still had a flat deck for sheet goods. When he tows his trailer he puts in the center 2 for chain hook points.

Thanks Clint! i think i have a plan for what ill do for the safety chain hooks, but i have been trying to figure out some tie downs for the bed. i wonder what kind of eyebolts are out there. i'd like to have some way that they were detachable. or unobtrusive.

this needed to be addressed. i drew up a simple solution to a pesky thing. for the fuel feed, return, brake line and electric harness.





i still have the brake line to the rear to make up.

[woodwright]

I found 3/4" forged eye bolts at a local farm and garden store. That size has a working load of around 5000 lbs.

Did you make those hard line holders? Those are sweet. I made some cruder versions of those for my Nova.

[ryanroo]

thanks! i did make them. they are jetted from 1/2" 6061 and then cross drilled for the mounting screws. we were having software issues with the pathing program for a while and i was about to mill them from bar stock. i'm glad the jet came back. much less time involved there

[1985-GMC]

Hey quit making us all look bad!

[woodwright]

I'm betting if you made a bunch of the 2 piece blanks you could sell a ton of them. I miss having access to a waterjet.

[$20071k10]

Man nice parts would be awesome to work with all those cool toys

[Dieselwrencher]

Have any plans on putting any isolators in there to keep the lines from chattering or anything? Nice work, I really like that type of holder.

[woodwright]

Originally Posted by Dieselwrencher

Have any plans on putting any isolators in there to keep the lines from chattering or anything? Nice work, I really like that type of holder.

I was thinking the same thing. Maybe make the holes a tad bigger for a piece of hose.

[ryanroo]

Originally Posted by 1985-GMC

Hey quit making us all look bad!

they gave me the key to the water jet. big mistake.

Originally Posted by woodwright

I'm betting if you made a bunch of the 2 piece blanks you could sell a ton of them. I miss having access to a waterjet.

the jet is sweet. makes crazy ideas become more realistic...

Originally Posted by $20071k10

Man nice parts would be awesome to work with all those cool toys

Thanks!

Originally Posted by Dieselwrencher

Have any plans on putting any isolators in there to keep the lines from chattering or anything? Nice work, I really like that type of holder.

Originally Posted by woodwright

I was thinking the same thing. Maybe make the holes a tad bigger for a piece of hose.

Thanks! keeps the lines all strait. i dig.

no plans. no need. the tube is seamless drawn SS control tube. pretty much like really small DOM only more critically manufactured. the parts are jetted and the head is dynamic so the cut is square. its pretty spot on with the tolerance to the small. after you clamp them down over the hard lines you have to manually separate them. there is no movement and no need for isolation. you could do pull ups off these... haha i will have an actual loom for the wiring and if i need to i will wrap the loom with material to give a snug fit in the clamp.