Fuel MPG with Mitchell Cam and Twins

[KatDiesel]

Originally posted by Mark_Kendrick

How do I get a hold of him???

Enterprise Engine



Telephone:

(740) 246-6329





Email:

-- email address removed --

 

[Mark_Kendrick]

Thanks Kat!!

 

[Chipstien]

Uh Oh!

Bombitus really has a hold of you, Mark.

 

[Chipstien]

Who knows...

Maybe I am next.

 

[OO]

I'm running twins with the 6 speed. HX40 into HX55.

 

[Chipstien]

OO, what are the specs on a HX-55. Can you use the HX-55 in place of the HX-35. Do you have pics.

 

[Mark_Kendrick]

Chip, you'd be using a 35 instead of a 40. . the 55 is the big dog and the 40 does the bottom side. . sort of.



OO drop me a not &/or some pics. . tell me about your rig.



Later,

Mark

 

[Jim Fulmer]

One for the poor boys

I thought that on a twin set up that a 55 would feed a 40... ..... would some one strighten me out. I hate to call someone and ask a bunch of questions as it's a pipe dream for a $4000. 00 kit right now, I was just wondering if I bought a HX-40 right now could I use it later.



Jim

 

[Mark_Kendrick]

From what I've learned. . someone chime in if I'm wrong...



one common way of setting up twins is for a smaller turbo to be bolted the the engine(hx40 or hx35) the exhaust outlet is routed to the exhaust inlet of a larger turbo.



the air comes in the larger turbo. the the outlet of the larger turbo is piped to the inlet of the smaller. The outlet of the smaller is to the engine.



I hope it helps,

Mark

 

[Don M]

Jim,



the smaller turbo will feed the larger one. The 40 would be a great single turbo and can be used as the primary or first turbo in a twin set-up. Most street guys do not do this though to help with lag. 35's are more common to get boost built faster.



Don~

 

[Jim Fulmer]

Thanks guys

Thanks for the info, yea it is a pipe dream, one thing I don't want to do is cut the truck up, I've been looking at enterprises pics and understand better on a set up.



Jim

 

[JB @ C and L Machine]

Originally posted by Don M

Jim,



the smaller turbo will feed the larger one. The 40 would be a great single turbo and can be used as the primary or first turbo in a twin set-up. Most street guys do not do this though to help with lag. 35's are more common to get boost built faster.



Don~

Don... didnt DBR blow up his 35 using it as the feed turbo on his twin set up???

 

[Strick-9]

Jim,



The larger compressor needs to have the air cleaner on it. After that, it can be hooked up any way you want.



The air needs to be compressed by the large compressor first. For the same reasons a 2-stage air compressor has a large cylinder for the primary and a small cylinder for the second stage.



-Chris

 

[Jim Fulmer]

Thanks, I like the air compressor thing! I didn't think of it like that but it makes all the sence now.



Jim

 

[Don M]

JBC,

yeah I think he did. He later said he thought he had a burr in the welding job that popped off and ate the turbine blades upon entering.



Don~

 

[Sled Puller]

Originally posted by Strick-9





The air needs to be compressed by the large compressor first. For the same reasons a 2-stage air compressor has a large cylinder for the primary and a small cylinder for the second stage.



-Chris

I ain't quite buyin the comparison to a two stage air compressor.



The air compressor is using the second stage to build high pressure with no concerns about heat or volume,(to a point), becasue the big stage can't do it.



We are using the second stage (littlecharger) for bottom end power, reduce lag, get out of the hole, help light the big one, whatever you want to call it.

Not for compressing the air more.

To a point, it is in the way after the big one lights. (Keeping in mind we are working in a circle, more air in means more exhaust gas to spin them even faster. )

If we wanted to compress it more, we would be looking for a REALLY small turbo, But we aren't. We are trying to make the little turbo as big as possible for less compression, less heat, max flow, low pressure, HIGH volume, and still have streetabilty.



Similar, but two totally different things the way I see it.

Gene

 

[OO]

Joe Donnelly is the only one I know of running the HX55 by itself. He's using the smallest housing which is 18cm. It will not bolt up to the stock exhaust header without an adapter plate. The flange is about twice the size of the HX35. The exhaust outlet of the turbo is 5". The compressor side will hook right up to the stock turbo elbow and the stock 4" intake hose. It also uses the same oil feed and return lines. If it weren't for the huge flange on the exhaust side it would bolt up just like an HX40. I already asked Joe if it was possible to bore out a 40 housing to fit the 55 and he said there simply isn't enough room to fit the monster exhaust turbine of the 55 into it. Too bad, that would make one sweet bolton setup.

I'll take a couple pictures of my twin setup tomorrow. I still have a lot of work to do on them to get rid of the lag and to make it easier to change my oil filter. Right now it takes about 2 hours. When you see the pics you'll understand.

 

[Sled Puller]

csutton,

I didn't take it as a fight, I just don't think we have two turbos for same reason an air compressor has two pistons.

Keep in mind we didn't want 85# of boost.



There was two other trucks getting twins after mine left. Pullers more than daily drivers. BIG turbos!



Gene

 

[csutton7]

I knew I wasn't ruffling your feathers, but just in case someone thought I was I threw that in there---point takin' about the air compressor comparison--I misinterpretted your post----pulling vehicles with bigger turbos--yes--cuz we can move the sled for a ways before turbos start to kick--thus one can deal with the lag until those big boys light----Dave better watch out he's going to put himself out of the pulling competition with all his work..... chris

 

[Sled Puller]

Yup, yer right, I always forget there is people out there that don't know us, that read things wrong EVERYTIME. LOL:{