RPM High Flow Intake Bridge

RPM Motorsports

smokinum
May 13, 2008
3,271
10
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Central Valley Ca.
Thanks for the explanation. How much room would you theoretically need moreso than whats there? Another inch or two of height?

What if you make a pedestal that simply tips the turbo up in front?

Thats what I mean by moved;). The pedistal needs to be reconfigured for larger runners to fit. Matt's BD has about 3/16-1/4" between the pass side runner and pedistal. The stock turbo is about the same.
 
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Mike_S

OOPS!
Nov 18, 2009
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Idaho
I have something to add here: Yes, shortfalls of intake systems can be REDUCED by forced induction, but not eliminated. If you have a system like the bridge in a duramax, where the intake stream has to make a near 90* bend to feed one side of the engine then it will tend to feed one side better than the other. How can a person see this you ask? Several ways...measuring EGT on both banks of cylinders, measuring boost pressures at the intake valves, you get the idea.

It is true that forced induction changes how the theorys are applied but the theorys are still the same. Even though it is forced induction there is still flow there and flow doesn't like to change direction. Besides, if a poor design can be fixed why not fix it?
 

Mike L.

Got Sheep?
Staff member
Vendor/Sponsor
Aug 12, 2006
15,681
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I have something to add here: Yes, shortfalls of intake systems can be REDUCED by forced induction, but not eliminated. If you have a system like the bridge in a duramax, where the intake stream has to make a near 90* bend to feed one side of the engine then it will tend to feed one side better than the other. How can a person see this you ask? Several ways...measuring EGT on both banks of cylinders, measuring boost pressures at the intake valves, you get the idea.

It is true that forced induction changes how the theorys are applied but the theorys are still the same. Even though it is forced induction there is still flow there and flow doesn't like to change direction. Besides, if a poor design can be fixed why not fix it?

Measuring EGT's per side will not tell you anything. We already have a hot side. Trying to direct pressure in the Duramax runners will not work. Fix the runners and it will all fall together.
 

othrgrl

Diesel Addiction Owner
Mar 10, 2008
2,151
4
38
Wilmington NC
www.mydieseladdiction.com
While I think it is an awesome piece I agree with Mike that you aren't going to see the gains that you may be expecting. I'm excited to see what you come up with for the runners and think there is ALOT of improvement to be had there.
 

BlkMax

Member
Sep 1, 2008
743
4
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Wasilla, AK
Trying to direct pressure in the Duramax runners will not work. Fix the runners and it will all fall together.
X3

In our case pressure is pressure, ignoring spraying (either nitrous or H2O/Meth) we are not trying to bring in something (like fuel) with the air-there is no need for even distribution of a fuel/air mixture. The high pressure (in the runners) will travel to the low pressure (the open intake valves).

Remember the Banks intake system?

Having said all that, that piece really looks cool :thumb:. It is great fabrication!
 

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RENODMAX

Dead Wrong
Mar 4, 2008
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Just a? but has anybody tried mounting the twins like the cummins guys do? both on the side of the engine? I was thinking about going to a single and pulling this year, and doing something with a remote mount, but i think im gonna stick to the strip, and keep the twins. But ive been brain storming about an intake also, making more room for the runners.

The empire diesel guys did something like that with their pulling truck but with a single. Basically the uppipes come up from the back of the motor to the side. Doesnt seem to be a ton of room but Im sure someone could stuff a big charger in there somewhere on the same side.
 

LBZ

Super Moderator
Staff member
Jul 2, 2007
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B.C.
I seen a really cool Quad turbo dmax in progress recently and the guy is doing something like that -except on both sides of the engine. And ya-it's tight!!
If one was making custom up-pipes, why couldn't he run one pipe all the way from one side of the engine to the other and tie them in before they go into the turbo?

I would think that would work pretty sweet!
 

Rhall

Old Skooler
Aug 12, 2006
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I seen a really cool Quad turbo dmax in progress recently and the guy is doing something like that -except on both sides of the engine. And ya-it's tight!!
If one was making custom up-pipes, why couldn't he run one pipe all the way from one side of the engine to the other and tie them in before they go into the turbo?

I would think that would work pretty sweet!

Thats what i was thinking. Tim and I have been brainstorming a few ideas to make more room for an intake. The longer the run, the more heat it will lose thus harder to light the charger, if i was sticking with a single, i was going to run the driver side manifold pointed towards the front, and the uppipe would come around the front side, (got all sorts of room with the electric fans) and then you have all sorts of room for a intake like the banks style. I dont know if theres enough room for a 42 and a 55 over there though.:eek:
 

05smoker

I'm officially done!
Mar 30, 2007
2,379
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Thats what i was thinking. Tim and I have been brainstorming a few ideas to make more room for an intake. The longer the run, the more heat it will lose thus harder to light the charger, if i was sticking with a single, i was going to run the driver side manifold pointed towards the front, and the uppipe would come around the front side, (got all sorts of room with the electric fans) and then you have all sorts of room for a intake like the banks style. I dont know if theres enough room for a 42 and a 55 over there though.:eek:

Keep the piping small. Don't ask me how I know.:rolleyes:

I am looking at ideas to modify my intake since my turbo is not there, just can't swallow 3k for a full sheet metal intake right now.
 

juddski88

Freedom Diesel
Jul 1, 2008
4,655
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Chesterfield, Mass.
would something like a tubular center section with individual "legs" for each port fed from the back where turbo would be work? kinda like the banks but with only one feed, not two, or could flip it so if CP3 was moved out of valley it would feed from front and be more of a 45* into it and not a 90*
 

05smoker

I'm officially done!
Mar 30, 2007
2,379
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36
Lebanon, OH
would something like a tubular center section with individual "legs" for each port fed from the back where turbo would be work? kinda like the banks but with only one feed, not two, or could flip it so if CP3 was moved out of valley it would feed from front and be more of a 45* into it and not a 90*

I like that idea also but that is where the big cost will come in - those individual runners take a lot of fab/welding.
 

juddski88

Freedom Diesel
Jul 1, 2008
4,655
120
63
Chesterfield, Mass.
im no fabricator, but to me its just some bent up sheetmetal :confused:
make flanges -> make legs-> weld legs to flanges @ equal legths -> bend up center tube to fit within space -> weld....polish, polish, and more polish:D

maybe i am just too optimistic
 

Rhall

Old Skooler
Aug 12, 2006
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Keep the piping small. Don't ask me how I know.:rolleyes:

I am looking at ideas to modify my intake since my turbo is not there, just can't swallow 3k for a full sheet metal intake right now.

Yeah, i remember your problems you had. Got a lot of ideas from your set up too. Sorry for the ot Russ.