MP122H Dyno Numbers.
Thread Starter
11 Second Club
Joined: Jun 2005
Posts: 287
Likes: 0
From: San Diego, Ca.
MP122H Dyno Numbers. Well, we got a chance to do some tuning today. Below is the before and after dyno for my car. The injectors (42lb) are at 94% duty cycle, and fuel pressure is steady at 50psi at wot. Below are the mods I had before, and what I have now.
The mods that did not change:
-Full 2.5" dual exhaust into a 2-1 muffler at the rear.(3 mufflers, 2 cats)
-Fuddle 3200 stall converter
-K&N Cone Filter
This is what I had before in addition to the above mods.
-MP112 1:1 rear ratio, 2.9" pulley on the front (11.5 psi)
-Stock throttle body ported
-Stock descreened maf
This is what I have now in addition to the mods up top.
-MP122 1:1 rear ratio, 2.9" pulley on the front (13.5psi)
-UMI 90mm throttle body
-GM 85mm MAF
-Magnavolt
This is a stock engine, stock manifold, stock tranny car. Here is the before and after.
434/460 before
485/456 after
I'm sure some people will be happy, and others dissapointed. Post up what you feel, I'm sure Magnuson will be listening. I have tried to be as straight forward, and honest as possible, as not to sway anyone's opinion. For me, this blower is great. The car pulls very hard, and I'm sure the MPH will be there at the drag strip as well. I should have timeslips on the 23rd.
The mods that did not change:
-Full 2.5" dual exhaust into a 2-1 muffler at the rear.(3 mufflers, 2 cats)
-Fuddle 3200 stall converter
-K&N Cone Filter
This is what I had before in addition to the above mods.
-MP112 1:1 rear ratio, 2.9" pulley on the front (11.5 psi)
-Stock throttle body ported
-Stock descreened maf
This is what I have now in addition to the mods up top.
-MP122 1:1 rear ratio, 2.9" pulley on the front (13.5psi)
-UMI 90mm throttle body
-GM 85mm MAF
-Magnavolt
This is a stock engine, stock manifold, stock tranny car. Here is the before and after.
434/460 before
485/456 after
I'm sure some people will be happy, and others dissapointed. Post up what you feel, I'm sure Magnuson will be listening. I have tried to be as straight forward, and honest as possible, as not to sway anyone's opinion. For me, this blower is great. The car pulls very hard, and I'm sure the MPH will be there at the drag strip as well. I should have timeslips on the 23rd.
TECH Resident
Joined: Oct 2004
Posts: 807
Likes: 0
From: TAMPA by way of MIAMI!!!
Am I reading that correctly the graph starts at 3500 rpm? How did it look before that? These roots style blowers are supposed to have more low end right? I'm looking into this as an option for my Blazer X LS2 with some mods mostly valve train and a Maggie the MP122H looks promising. I would prolly run it at 8 psi though.
Thread Starter
11 Second Club
Joined: Jun 2005
Posts: 287
Likes: 0
From: San Diego, Ca.
Originally Posted by firefighter
Am I reading that correctly the graph starts at 3500 rpm? How did it look before that? These roots style blowers are supposed to have more low end right? I'm looking into this as an option for my Blazer X LS2 with some mods mostly valve train and a Maggie the MP122H looks promising. I would prolly run it at 8 psi though.
Thread Starter
11 Second Club
Joined: Jun 2005
Posts: 287
Likes: 0
From: San Diego, Ca.
Originally Posted by firefighter
Oh so converter lock up? What kind of numbers would you be able to expect? Theories? Estimates? SWAGS? Just for conversation.
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?
Pouria Savadkouei
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
