Interesting 110" Dyno Results
Thread Starter
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Novice
Joined: May 2017
Posts: 24
Likes: 2
From: Peoria, IL
Interesting 110" Dyno Results
New to the forum... so I appreciate all feedback.
New build this winter has interesting results... Peak Dyno numbers are impressive at 125hp and 130tq, however what is going on at ~2400 rpm
The build:
110"
MVA Heads
High Compression Pistons
5.3 SE Injectors
58mm Throttle Body
259e Cams
Cam Support & High Volume Pump
SE Race Clutch
Vance n Hines Power Duals
Rinehart 4" with competition baffles
New build this winter has interesting results... Peak Dyno numbers are impressive at 125hp and 130tq, however what is going on at ~2400 rpm
The build:
110"
MVA Heads
High Compression Pistons
5.3 SE Injectors
58mm Throttle Body
259e Cams
Cam Support & High Volume Pump
SE Race Clutch
Vance n Hines Power Duals
Rinehart 4" with competition baffles
Seasoned HDF Member
Joined: Dec 2005
Posts: 19,868
Likes: 7,987
From: poway
Cutting the duration of the cam will help also.. While I say the head pipe is the problem, I'm not sure how the SnS 2-1-2 headpipe would do.. I was thinking more of a full exhaust system, something more like a Fatcat or super-trap 2-1..
I would probably do both cam and pipe.. IMO they work together to get rid of the dip but you'd probably loose some of the peak numbers. But then you might not loose much..
Sounds a little wishy-washy on the output numbers and it is. I don't have a direct example of a motor change that size.. Finding a longer head pipe, and less duration on the cam (with earlier intake close to increase CCP) will both help. If doing 1, don't know which is better.
Road Captain
Joined: May 2014
Posts: 648
Likes: 35
From: San Diego
A 30 plus drop in torque seems excessive for an exhaust but what the hell do i know. Is the fit really that bad or can that be tuned to improve it a little? Did your tuner work the timing at all?
Road Warrior
Joined: Feb 2017
Posts: 1,523
Likes: 642
From: Saint Charles, Missouri
I would advance the cams 4 degrees from straight up, and play with the ignition timing, that would clean up that dip, and bring everything in earlier. Save you a bunch of money and still get results.
Thread Starter
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Novice
Joined: May 2017
Posts: 24
Likes: 2
From: Peoria, IL
Well I received a suggestion, so I'll try it out. It was recommend to unplug the ACR, and then test the compression from front, to rear. If there's a significant difference (+/-10) it may suggest a cam timming issue... makes sense.. could explain why the AFR is good on the front cylinder but all over the place on the rear...
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HDF Community Team
Joined: Jun 2006
Posts: 12,774
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From: san antonio
Well I received a suggestion, so I'll try it out. It was recommend to unplug the ACR, and then test the compression from front, to rear. If there's a significant difference (+/-10) it may suggest a cam timming issue... makes sense.. could explain why the AFR is good on the front cylinder but all over the place on the rear...
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