First Attempt At Twins...

[Tacoclaw]

I don't know when he'll be back on here again, but yes he does have both of his drains T'd and then run into the stock return.

[DLittle]

Here's a picture of mine. I wrapped it with header wrap and it seems fine and it's just as long as your hot pipe.



unwrapped


I T'd my oil drains together and all is fine.

[92 D/UNIT]

Looks good Dana. how are you supporting the primary turbo?

[lectro_static]

Here's a picture of mine. I wrapped it with header wrap and it seems fine and it's just as long as your hot pipe.



unwrapped


I T'd my oil drains together and all is fine.

Is that an MSD ignition box on the drivers inner fender???? You know diesels dont use spark plugs

[92 D/UNIT]

Here's a picture of mine. I wrapped it with header wrap and it seems fine and it's just as long as your hot pipe.



unwrapped


I T'd my oil drains together and all is fine.

Is that an MSD ignition box on the drivers inner fender???? You know diesels dont use spark plugs

LOL i told him the same thing.

[IowaCummins]

Looks good Dana. how are you supporting the primary turbo?

See the plate steel located rear side of the exhaust inlet on the primary might have to zoom in

[cedardiesel]

AHineman it all looks great! only thing I would say in advice is make the cold charge pipe from your primary to your secondary like either 3.5 inch or 3 inch it will keep the velocity up and create a faster spool

[AHineman]

Thanks man! I don't think it spools bad with the 4" coldpipe, but when it warms up outside I may try to make one out of 3". Drain lines are #12 line teed into stock location. Hot pipe is wrapped and everything is painted black or cummins beige. I'll try to get pics next week sometime. I have a question though...Back when SNOOT made the thread about his twins he said if he lifted too fast when on it hard it would kill it. I have the same problem. What will fix it? Blowoff valve help?

[BC847]

I have a question though...Back when SNOOT made the thread about his twins he said if he lifted too fast when on it hard it would kill it. I have the same problem. What will fix it? Blowoff valve help?

Don't let off so fast.

I have the same issue and I'll be the first to admit it takes practice to "roll-off" the throttle instead of side-stepping it.

When side-stepping the throttle after a full throttle blast, the fuel pressure in the tip of the nozzle drops below the pressures in the combustion chamber, thus air is backing-up into the nozzles. It's the same effect as letting the truck run out of fuel ~ air in the injectors. You have to crack the injector feed-lines to burp the air out to get the mess to run again.

It is so cool when it does that sthi after a WOT 1/4 mile blast and things are still glowing.


A blow-off valve won't fix it (you'd have to come up with a controller to make it work right to start with).


I second the point of keeping the charge-air piping size smaller than one might think one needs. A larger diameter pipe may offer a tiny amount less resistance to flow, but then you've also got to charge that fat boy with air every time you hit the throttle, and that is presented as Lag (poor throttle response).

[AHineman]

Thanks. I hate to sound dumb, but its not something you hear about everyday. At least not on 1st gen forums. I just wondered about blowoff valves because Source Automotive uses them with their kits, but I didn't know if it was because of this or to limit max boost pressure.

[Tacoclaw]

Though it may be a bit of a pain to package, why not some sort of micro switch on the throttle arm, hooked to an electronic gate on your IC piping? Have the gate dump into the atmosphere, and anytime you're at idle it's open. Perhaps filter it someway, so you don't have dust coming in, if you can find a filter that can handle 60+ psi coming out of it.

[dazedandconfused]

What about an external wastegate mounted at the manifold?

[SNOOT]

I have got use to the lifting issue. I was really worried at first but now I am all good have not killed it in months. I am also going to make a 3" cold pipe this spring and see if its better... I will say I have been very happy with the way my truck spools even with the 62...

[AHineman]

Well, its been forever and a day but I just got a new laptop and highspeed internet so I finally got around to posting some more pics. Some were taken after dark, they aren't the best but oh well.

Primary brace (Oil drains are no longer teed)
http://i809.photobucket.com/albums/zz16 ... CN0138.jpg
5" downpipe vs. stans 4" downpipe
http://i809.photobucket.com/albums/zz16 ... CN0147.jpg
Painted and header wrapped downpipe
http://i809.photobucket.com/albums/zz16 ... CN0156.jpg
A few pics of it painted, etc. Downpipe was off because I was cleaning and painting it...
http://i809.photobucket.com/albums/zz16 ... CN0161.jpg
http://i809.photobucket.com/albums/zz16 ... CN0158.jpg
http://i809.photobucket.com/albums/zz16 ... CN0157.jpg

[Tacoclaw]

DANG!!!

Your grandpa has a sweet truck.