2012 Dyno Results

[y5e06]

post up your 2012 numbers, ain't got nothin to hide...


dyno: ProTech, Austin
date: 14-Jan-2012
Car: #95 Firebird
Class: CMC
Engine: LT1
Restrictor: 41mm [dual hole] plate
HP: 259
Tq: 304

Bumped up from the 40mm plate of last year to a 41mm this year.
pulled 259/304 averaged peaks of 3 runs. last year at Colvin's w/ a 40mm I did 255/304 and with a 39mm I did 251/302, so it is good to see consisent results. I had previously estimated 5hp/mm in plate size for a relative short range of diameters and this set of pulls was spot on.
Don't worry, I'm sure I'll scale in around 75-100lbs over. Plenty of margin.

[michaelmosty]

dyno: Dallas Mustang
Date: 1/9/12
Car: #11 Mustang
Class: CMC
Engine: 302
Restrictor: haha
HP: 261
TQ: 295

Same numbers as last year.

[RichardP]

dyno: Houston Performance
date: 12-Jan-2012
Car: #82 Camaro
Class: CMC
Engine: LT1
Restrictor: 36mm [dual hole] plate + one piece of 2" wide duct tape over the air box opening
HP: 258
Tq: 302

The duct tape will be replaced with an identically sized but more durable piece of sheet aluminum before the first race. Dan is making up some more restrictors with smaller openings for the next time it is on the dyno. Let me know if anyone needs some...


Richard P.

[Chuck]

dyno: ProTech, Austin
date: 14-Jan-2012
Car: #14 Mustang
Class: CMC
Engine: 302 EFI
Restrictor: None
HP: 251
Tq: 290

First dyno numbers with new E303 cam installed.

Chuck
CMC#14

[Casey_SS]

dyno: Colvin Automotive, Austin
date: 19-Jan-2012
Car: #29 Camaro
Class: AI
Engine: LT1
Restrictor: 42mm
HP: 370
Tq: 365

Last season I dyno'd 360/360 with a 38mm plate. Shooting for 375 this year so I swapped to a 42mm plate, made a small change to the tune and dyno'd 355 at ProTech last weekend. HP went the wrong way and the AFR was doing some wacky things...no bueno on the tuning change. No time to fix it though so I just got my annual done (Thanks Kyle!) and put it back on the trailer. Tried a different approach in the tune, went to Colvin today and pulled 370/365 with exactly the AFR I was looking for. Started to try a 44mm plate but not while paying hourly dyno rates. It's close enough...I'll just yank some ballast and call it done. No fun paying for two dynos but it's done now, I learned some stuff, and made sure the tune is safe to go out and beat on.

[AllZWay]

My numbers were the same as last year with the newer engine.

dyno: Alamo - Arlington, Texas
date: 2-Jan-2012
Class: CMC
Restrictor: None
HP: 264
Tq: 303

[jdlingle]

dyno: LateModel Racecraft, Houston
date: 21-Jan-2012
Car: #25 Mustang
Class: CMC
Engine: 4.6L
Restrictor: A restrictor plate or air restrictor is a device installed at the intake of an engine to limit its power. It is not needed in Mustang applications.;)
HP: 255
Tq: 297

[ShadowBolt]

dyno: LateModel Racecraft, Houston
date: 21-Jan-2012
Car: #25 Mustang
Class: CMC
Engine: 4.6L
Restrictor: A restrictor plate or air restrictor is a device installed at the intake of an engine to limit its power. It is not needed in Mustang applications.;)
HP: 253
Tq: 297

Yep, that is a 4.6

Team Jordan
Dyno: Protech Austin
date: 1-21-12
#55 Mustang
class: CMC
restrictor: yeah right NONE
engine: 4.6
HP: 256
TQ: 299

JJ

[edrock96GT]

dyno: Central Texas Motorsports, Kempner
date: 21-Jan-2012
Car: #21 Mustang
Class: AI
Engine: 4.6
Restrictor: stock pcm tune...
HP: 290
Tq: 293

Good thing that first turn is only about 10' away at MSRH...

[Alien]

dyno: Late Model Racecraft, Houston
date: 21-Jan-2012
Car: #32 Camaro
Class: CMC
Engine: LT1
Restrictor: 43mm [dual hole] plate
HP: 262
Tq: 305

First set of pulls was 262hp unrestricted. Back on the rollers later w/ 47mm plate to take the edge off, 270hp, but the water temp was low. Got it up in the temp range, three more pulls, 269hp (same 47mm plate). Hmmm. Lets try a 43mm plate, maybe it will keep gaining hp and I'll go run AI. :)

[ShadowBolt]

dyno: Late Model Racecraft, Houston
date: 21-Jan-2012
Car: #32 Camaro
Class: CMC
Engine: LT1
Restrictor: 43mm [dual hole] plate
HP: 262
Tq: 305

First set of pulls was 262hp unrestricted. Back on the rollers later w/ 47mm plate to take the edge off, 270hp, but the water temp was low. Got it up in the temp range, three more pulls, 269hp (same 47mm plate). Hmmm. Lets try a 43mm plate, maybe it will keep gaining hp and I'll go run AI. :)

Damn fine numbers Gary.

JJ

[Tilton]

dyno: Late Model Racecraft, Houston
date: 21-Jan-2012
Car: #35 Mustang
Class: CMC
Engine: 5.0
Restrictor: none
HP: 215
Tq: 285

I have long tubes which are going to be replaced sometime before TWS. It's going to be a fun battle for Rookie of the Year. :)

[cobra132]

Are you guys making your restrictor plates or is there a place to purchase them. I'am new to this restriction action. FMR

[rleng1]

dyno: Late Model Racecraft, Houston
date: 21-Jan-2012
Car: #77 2000 Camaro LS1
Class: CMC
Engine: LS1
Restrictor: 46 mm
HP: 262
TQ: 298

Same as last 3 years.

[Fbody383]

dyno: Late Model Racecraft, Houston
date: 21-Jan-2012
Car: #39 1994 Camaro
Class: CMC
Engine: LT11
Restrictor: 40 mm
HP: 260
TQ: 309

Definitely not the same as last 3 years and certainly no room to moan about lack of power out of this car. Was just happy to get through the dyno runs clean since the whole drivetrain was out of the car 2 weeks ago. Motor keeps running stronger so it must be getting ready to let go. Dyno showed a huge drop in power around 4900 rpm; springs are relatively fresh so maybe that automatic computer just isn't happy... or just scared of mighty Mustang power.

I also have a set of passes with a 42mm plate 266hp/311tq.

[ShadowBolt]

Are you guys making your restrictor plates or is there a place to purchase them. I'am new to this restriction action. FMR

I will make whatever you need Frank. Just let me know.


JJ

[ShadowBolt]

dyno: Late Model Racecraft, Houston
date: 21-Jan-2012
Car: #39 1994 Camaro
Class: CMC
Engine: LT11
Restrictor: 40 mm
HP: 260
TQ: 309

Definitely not the same as last 3 years and certainly no room to moan about lack of power out of this car. Was just happy to get through the dyno runs clean since the whole drivetrain was out of the car 2 weeks ago. Motor keeps running stronger so it must be getting ready to let go. Dyno showed a huge drop in power around 4900 rpm; springs are relatively fresh so maybe that automatic computer just isn't happy... or just scared of mighty Mustang power.

I also have a set of passes with a 42mm plate 266hp/311tq.

WOW!

Great numbers. No 4.6 can't get near that

JJ

[BryanL]

Are you guys making your restrictor plates or is there a place to purchase them. I'am new to this restriction action. FMR

Aren 't you are running a carb (ugh) now? Look into old Nascar plates maybe? Glenn and I came up with the plates for the LS1 then had a machine shop make them out of plastic so probably won't help you much.

[Wade]

dyno: Late Model Racecraft, Houston
date: 21-Jan-2012
Car: #34 1986 Mustang
Class: CMC
Engine: 302
Restrictor: 50 mm
HP: 254
TQ: 299

[HoustonNW]

dyno: Late Model Racecraft, Houston
date: 21-Jan-2012
Car: #85 1998 Camaro
Class: CMC
Engine: LS1
Restrictor: 48 mm
HP: 256
TQ: 303

dyno: Late Model Racecraft, Houston
date: 21-Jan-2012
Car: #85 1998 Camaro
Class: CMC
Engine: LS1
Restrictor: 49 mm
HP: 266
TQ: 306

I didn't have a 48.5mm diameter restrictor!

Since the car is still 50lbs overweight I am tempted to run the higher numbers. 266 is a little close if I ever need to dyno however.

What do you think?

[michaelmosty]

Wayne, I'd go with the 48mm plate. To go w/ the 49mm plate you would need to be 75 lbs over min weight. Maybe run the big plate at TWS and the small plate everywhere else.

[GlennCMC70]

dyno: Late Model Racecraft, Houston
date: 21-Jan-2012
Car: #85 1998 Camaro
Class: CMC
Engine: LS1
Restrictor: 48 mm
HP: 256
TQ: 303

dyno: Late Model Racecraft, Houston
date: 21-Jan-2012
Car: #85 1998 Camaro
Class: CMC
Engine: LS1
Restrictor: 49 mm
HP: 266
TQ: 306

I didn't have a 48.5mm diameter restrictor!

Since the car is still 50lbs overweight I am tempted to run the higher numbers. 266 is a little close if I ever need to dyno however.

What do you think?

Run the 48MM. 10hp jump is alot for 1MM. Besure your being very consistant w/ dyno runs from start RPM to engine temp and trans/diff temp. Looks like to me the diff and trans warmed up during the 1st set of pulls and the result showed up during the 2nd set.

[BryanL]

Wayne-thats a big jump in hp. I looked through my old dyno's and didn't see anything that big when changing one plate size. How many pulls did you make on the 48 and then the 49? You would have to add some weight to run that 49 mm. I would just stick with the 48 and then you don't have to worry about it. You could even see about pulling more weight out of the car to get closer to the minimum which shouldn't be hard to do.