Twins

[Swayse]

Who makes them? How Much? I talked to Bully Dog, they told me soon. No time frame, just soon. It would be nice to have a waste gate so you wouldn't have to o-ring the head right away, head gasket should hold 50 to 55 right? I've got some buddies that need some.

 

[Jetpilot]

Head gasket is normally safe at 35 and below. Yet even some have had failures below 35 psi. Once you go above 35 psi one can never be sure if/when the head gasket will fail. If I were you and considering twins O-ringing the head is good cheap insurance. It is always easier to build it right rather that try and fix it later.



Doug

 

[Swayse]

o-ring

I've got 4 buddies that each want a set of twins. I guess I just need to send them to Enterprise Engine to get the twins and the head o-ringed. I was just hoping to save them some $$$$. I still don't really understand how they work. It looks like all the exhaust gases go through the small turbo and then through the big turbo. It still looks like a big restriction to me. Unless, when the small turbo opens the waste gate that it becomes less restrictive and then dumps the into the big turbo and gets that to spinning... . As long as it works.

 

[TxDieselKid]

Don't forget our friend Nowel of PerformanceDiesel.net. He was the first one to put twins on a 24v, and has several sets also.



Andrew

 

[cmonroe]

Peter, I started seeping the stock head gasket at 42 psi. I would not expect a head gasket to last very long without o-ringing the head or the block for compounds. I would recommend o-ringing before using compounds. However Mark Kendrick sales a set compounds for a very reasonable price and I'm sure me would really work on the price if you bought 4 or 5 sets. His compound setup works very well for both racing or daily driving. I have over 8000 miles on this setup right now and have had no problems. The system also comes with a huge external adjustable waste gate. Happy ramming and trust me, you will love compounds.

 

[csutton7]

Peter--it works you won't have to worry about that-- you should call Performance Diesel and Enterprise and talk to them--I think you get 2 new turbos from Perf. Diesel, where as you only get one(big) turbo + a housing for your existing turbo from Enterprise and there may other things that are different between the two--I know I love my Performace Diesel set up..... chris

 

[Jim Fulmer]

Or you could just build it yourself. I've had mine on for 3K or so now with no problems, not even a blown off hose yet... . Knock on wood... ... . Oh yea... ... 60 PSI in lockup!



Jim



https://www.turbodieselregister.com/user_gallery/displayalbum.php?&userid=9347&albumid=420

 

[JohnE]

When I told Piers my timing was at 20&deg;, He asked if I had <nowrap>o-ringed</nowrap> the head.

Boost isn't the only gasket <nowrap>by-pass</nowrap> method

 

[csutton7]

John E--you're dead on there---if your truck isn't warmed up enuff and you step on it you can also have the head gasket blow ---chris

 

[Roger rodbolt]

I've been running my ETC hard in the 50's on boost and am still on the to stock head gasket. Never a reason to pull the head or I would oring. The 12 valve engines won't take as much boost/timing before the gasket goes. Larry

 

[JohnE]

Forgot this in the first post

Go to TDR Classified



Mark Kendrick has been working on an affordable twin set-up. Maybe this is what you're looking to use?

 

[work2muchplay2little]

For those of you who have had the o-ringing done, what gasket are you using? I've had some trouble in this area - we used one of the new copper gaskets with the sealer imprinted around all the oil/water passages - was loosing compression into the coolant system from the start even with the head torqued to 135 ft/lbs. We have replaced it with a 12valve 0. 0020 inch over gasket.

 

[Strick-9]

work2much,



I wanted to try out one of those copper gaskets with the sealant already on it. My concern was the copper wasn't properly annealed. In my opinion, it is crucial to anneal the copper to get it soft enough to seal. Those copper gaskets with the sealant on them can't be reannealed so you end up trusting someone elses work on what's good enough.



That was most likely your problem.



-Chris

 

[cmonroe]

Work2Much,

I wanted to us the . 020 over head gasket, but at the altitude I live at I decided to go with another stock gasket. As far as your head bolts go, I tested the factory Cummins head bolts on my 12v and they were stretching right at 130 something I forget now. So I torqued them at 120.

 

[Jim Fulmer]

work2muchplay2little



Kurt, call Piers about his and he will set you up with a good gasket and set of studs and you'll be done.



Jim

 

[Sled Puller]

Enterprise!

 

[work2muchplay2little]

Thanks for the responses - I've got the studs in already - Nowel (HVAC) has done all the work on the head and turbos. His customer service is outstanding - he came all the way from CA to TX to replace the copper gasket that wasn't holding. I'm just wondering what type of head gasket those of you who are running insane amounts of boost have found to be successsful.

 

[Jim Fulmer]

Kurt, I didn't even think about Nowell coming down to help you... my bad. I guess that pretty much explains his customer service and that is nice to see this day and time, Thumbs up Nowell! Kurt are you using a B-1 as the primary or are you using your 40... just curious! I like the idea of folks using different turbo's, give the customers, buyers or builders a different set of options, I guess the reason I used what I did was I had it.



Jim

 

[csutton7]

I'm not sure this head gasket thing is worked out yet--my copper head gasket & double "o"ring we put in back in February blew in July--it still holds until you hit about 50 psi and then it pressurizes the coolant system---the other guys--Enterprise in particular, have used the waste gate and this I believe is why their's is holding-you can't count Dave's as his top end is torn down after every 3 or so runs(I've heard)-once you continually hit 65 psi and above at some point they will fail---I know Nowel and I will try something new when we tear mine apart--what that will be I don't know yet, as we are still researching---it's too bad about the silicone coated gasket not working-there was high hopes for this version---waste gating may be the only answer, but I hope not---chris

 

[Sled Puller]

A lot of it has to do with common sense. My system hit 84 pounds when we broke it in. It is not needed, and it super heats the air anyway. I wastegate at 60-65, had the BLOCK decked and O-ringed, and went with a marine head gasket. It is holding fine.



Of course, there is no doubt a few tricks Mitchell applied to this area while he was doing it, I/we will never know.



Anybody can put these engines together or build twins, but getting them to stay together at these levels is another story.



I don't believe Daves has been apart much at all this year, it was a pretty mild year for carnage.