Competition Newest set of twins

[TxDieselKid]

Cool bit of info Jim. Glad to hear you are still finding enjoyment from tinkering with them.



Andrew

 

[kevin1]

I talked with mark a long while ago and told him he was on the right track. My screen name was WIZ1 but after I moved here from Calif I couldn't get it to work, anyway we used this (devorced waste gate setup a long while ago on a bigger application (4 Turbo's) Mark knows his stuff from what I can see just my . 02

 

[Steve Campbell]

Just a thought....

Mark, ... .....





quote:

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-Why is the primary compressor airflow tubing not stepped up sooner in size instead of just enlarging the tubing diameter at the secondary compressor wheel??.

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smaller pipes have less volume. This preserves velocity and reduces lag.



The 40 (on this HX35) compressor wheel is just over 2" at the opening. 4" pipe is only needed to seal the pipe to the compressor housing.





... ... ... would it be of any benefit to keep the 2'' right up to the inlet of the HX35 compressor "wheel "(less about . 020) and weld the same 4" adaptor "over" the 2'' to allow sealing the pipe to the compressor housing. This would eliminate the "expansion" chamber almost completely (Which your new system does a pretty good job of already)?

 

[Jim Fulmer]

Two things I will throw in here to kick around. 1. The outlet to the HT3B is 3. 5" that's why I used that size pipe on mine. 2. The smaller pipe would equal less pressure in the pipe but more velocity, Convergent nozzle design like a jet engine, It may not matter but I thought of it!



Jim

 

[Mark_Kendrick]

I used 3" pipe on these. the HT3B has the 3" pipe fit into the outlet so it can't expand to 3. 5" then I welded a 3. 5" collar to the outside of the pipe for a coupling surface.



yes, putting a smaller coupling on the 35 would be great but probably not woth the effort. the air stacking up in the front of the housing, I feel, probably takes better advantage of the bleed oraface on the HX35/40 allowing more air to be pushed through the compressor.



Thanks,

Mark

 

[TxDieselKid]

Originally posted by Jim Fulmer

2. The smaller pipe would equal less pressure in the pipe but more velocity, Convergent nozzle design like a jet engine, It may not matter but I thought of it!



Jim

Wouldn't the larger piping allow the air to be less dense, and therefore, allowing it to not heat up as much?



Seems like a trade-off.



Andrew

 

[Cooker]

Originally posted by Mark_Kendrick

smaller pipes have less volume. This preserves velocity and reduces lag.

I am asking this for a topic unrelated to twins.



Mark,

With this statement, are you essentially saying that it increases pressure?



Thanks,

Ryan

 

[Mark_Kendrick]

No, smaller volumes take less time and air to achieve the same pressure given the same pressure source.



so te time it takes to increase the pressure in the vessel is reduced... hence a itty bitty bit less lag

 

[Joseph Donnelly]

How much horsepower are you going to show us at May Madness with the new twins?

Oo.

 

[Mark_Kendrick]

1200+ . . from 2 trucks



Hopefully my dually will be back on the road by then.