RPM High Flow Intake Bridge

rdohara

New member
Jun 17, 2009
122
0
0
I agree all the way Mike! The runners are the next step, and on my list. All that air trying to go through the stock bridge, and hitting a wall on the inside, has got to be a restriction feeding the stock runners. Just my way of eliminating an issue.


what is what in the photos???
 

TheBac

Why do I keep doing this?
Staff member
Apr 19, 2008
15,595
1,842
113
Mid Michigan
Im not sure if LBZ runners/bridge will work with an LB7 turbo inlet, will they?

If you did finally find a way to make a set of low-rise (read: within stock or near stock size so turbo is left alone) intake runners, wouldnt you then have to worry about the size/length of the runners themselves? Or doesnt that matter on a positive-pressure (boosted) intake system as compared to a n/a (suction) one?

Cp3 shouldnt be an issue, would it? Wouldnt you just run it in the dual-alt space, and if want to run a second Cp3, you run it like Rob and Ken did on Max'd Out?
 
Last edited:

RENODMAX

Dead Wrong
Mar 4, 2008
3,602
0
0
I was going to post to watch for some runners and some other new goodiespryer told me about when i was down at his house two weeks ago but he beat me to it! I bet you the stock runners are capable of flowing more than the stock y bridge can provide :cool:
 
Last edited:

TheBac

Why do I keep doing this?
Staff member
Apr 19, 2008
15,595
1,842
113
Mid Michigan
LB7/LLy bridges will not work with LBZ/LMM runners, and vice versa.

Yes, know that. You have to change the runners on the heads along with the bridge. I was wondering if the LBZ setup would work with the LB7 metal turbo inlet. Im not sure where the LBZ intake pipe is in relation to the inlet.
 

paint94979

Beer Nazi
Sep 18, 2006
11,715
8
38
37
Yes, know that. You have to change the runners on the heads along with the bridge. I was wondering if the LBZ setup would work with the LB7 metal turbo inlet. Im not sure where the LBZ intake pipe is in relation to the inlet.

in MPI's kit does isn't the stock turbo fed through a modified LB7 MP?
 

bullfrogjohnson

Big Girl!
Nov 20, 2006
4,167
1
0
39
Locust, NC
LBZ/LMM on the left, LB7/LLY on the right.

The one on the left is not a lb7. The lb7 are top fed and to me it looks like all the air flows to the driver side especially if you run injectables.

Look very nice Russ. I would love one for a lb7. The unit you have now would work perfect if you just welded a 3" 90* on what you have.

Here is a PPE modified LB7
 

Attachments

  • intakemanifold.jpg
    intakemanifold.jpg
    11.4 KB · Views: 64

paint94979

Beer Nazi
Sep 18, 2006
11,715
8
38
37
The one on the left is not a lb7. The lb7 are top fed and to me it looks like all the air flows to the driver side especially if you run injectables.

Look very nice Russ. I would love one for a lb7. The unit you have now would work perfect if you just welded a 3" 90* on what you have.

Here is a PPE modified LB7

i would much rather have Russ's piece over that... for 750$ PPE welds a single on top and thats it? come on that can be done A LOT cheaper
 

bullfrogjohnson

Big Girl!
Nov 20, 2006
4,167
1
0
39
Locust, NC
i know that Travis:D

:rofl: I am very impressed with russ' stuff. This unit on a LB7 should flow the air alot more evenly to the heads especially for the guys running water or nitrous. If you look down a lb7 unit it look to me everything gets sent to the drivers head as the water or nitrous would have to make a 90* abrupt turn to make it to the passenger.
 

Mike L.

Got Sheep?
Staff member
Vendor/Sponsor
Aug 12, 2006
15,681
232
63
Fullerton CA
:rofl: I am very impressed with russ' stuff. This unit on a LB7 should flow the air alot more evenly to the heads especially for the guys running water or nitrous. If you look down a lb7 unit it look to me everything gets sent to the drivers head as the water or nitrous would have to make a 90* abrupt turn to make it to the passenger.

I also like Russ's unit, but your explanation is only valid with a naturally aspirated setup. Add forced air and all bets are off. Forced air changes everything. I learned this working with Gerry Magnasson with his twin screw years ago. We did test after test changing intakes and exhaust. We tested converter stall and differential ratios. We tested camshafts and head work.
We learned a lot and found that if there was any weakness in air delivery with a naturaly asperated enfine; that problem did not exist any longer with forced air, to a certain extent. Flow is a different problem and the Duramax has one. It is not at the pipe that feeds the runners. It is the runners themselves. Fix the runners properly and you will add 100 hp.
 

RENODMAX

Dead Wrong
Mar 4, 2008
3,602
0
0
You can't just go build high flow runners..you have to build the whole system and this is just one part of it. You need runners pedestal y bridge etc all of which russ stated he's working on. This is just a sneak peek :D. Also put a pressurized substance such as n2O through a stock y bridge and see which way it flows. I'll tell you it's definately not even so yes it does matter.
 
Last edited: