Just got back from the Dyno

HoofnIt

Founding Member

Jan 8, 2001

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36

North Carolina

Nov 9, 2004

#1

• Nov 9, 2004

• #1

I learned alot today and although I didn't quite reach the 300rwhp mark I am still happy with the outcome and my ping is GONE! The car also feels alot smoother and the fan temps were lowered.

stock, untuned 278hp 317tq
after tuning 283hp 316tq
minus Flowmasters 291hp 323tq

Bottom line the car did not perform better by adding more timing in the upper rpms. The power/torque curve pretty much peaks at 5000 and 4100 rpm respectively. My valvetrain was floating at 5800rpm but I think I need to readjust the valves and use 3/4 turn as opposed to 1/2 past zero lash. The tuner seems to think my Cobra intake (ported lower) is holding the power down. I'm pretty much falling off @ 5600rpms. Even with a different intake I guess the point would be mute without upgrading the valvetrain.

If anyone wants to comment I would appreciate it. I would post the graphs but they are a winPEP 7 file.

Thanks!

I found it very interesting that with the Flowmaster 2 chambers disconnected the car picked up 8 rwhp. Although I did not reach my goal of 300hp I came pretty darn close and the ULTIMATE goal is to attain high 12's at the track and with this data I know the numbers are there, now I will need alot of practice.

 

H

HRT11

New Member

Feb 2, 2004

122

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0

Plattsburgh, NY

Nov 9, 2004

#2

• Nov 9, 2004

• #2

nice numbers
cant believe the cat back held it back that much!

 

mytight95

Active Member

Apr 11, 2003

2,605

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46

Dothan,Al

Nov 9, 2004

#3

• Nov 9, 2004

• #3

what did you guys do..........take a sawzall to it while on the dyno or something.....


jason

 

HoofnIt

Founding Member

Jan 8, 2001

1,175

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36

North Carolina

Nov 9, 2004

#4

• Nov 9, 2004

• #4

We took off the 4 nuts that held each muffler/tailpipe in place. I think welding in some cutouts would accomplish the same thing. I will add that without the mufflers it was loud as H_LL!

 

Joes95GT

New Member

Jan 23, 2003

3,132

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Delaware

Nov 9, 2004

#5

• Nov 9, 2004

• #5

Who ever said you need backpressure?!

Have you ever seen inside of a Flowmaster muffler? If you have, you would know why they kill horsepower. It looks like Flowmaster welded metal bricks in the muffler...

Those are very impressive numbers for such a "small" cam.

Joe

 

Killercanary

The car that set the bar.

Founding Member

Nov 29, 1999

5,676

1

76

Altoona, PA

Nov 9, 2004

#6

• Nov 9, 2004

• #6

Damn nice numbers indeed. I wonder how much my stock tail pipes are hurting me... if I showed you pics of how they are butchered on there and how much of a restriction there is I think you'd crap. Hopefully I can address that issue soon. Again, congrats! Did you make peak HP at 5000rpms???

 

R

rudeone707

New Member

May 17, 2003

1,829

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Fairfield, Ca

Nov 9, 2004

#7

• Nov 9, 2004

• #7

nice numbers, what do you hit 1/4 wise?

 

HoofnIt

Founding Member

Jan 8, 2001

1,175

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36

North Carolina

Nov 9, 2004

#8

• Nov 9, 2004

• #8

Peak torque occured around 4000 to 4100 rpm. Yes, peak hp was @ 5000 rpm and started to fall off 5600-5700. I don't know how to post the graphs. I should be able to take a pic of the printed version if all else fails.
Does anyone know of some quality cut-outs? I'd love to be able to crawl under the sides of the car and turn a valve when I'm on the track but I want a good seal and no leaks.

I won't be able to take it to the track for another 3 months! I guess that will give me some time to get some drag radials.

 

final5-0

Mustang Master

Apr 6, 2003

6,817

12

79

DFW Texas

Nov 9, 2004

#9

• Nov 9, 2004

• #9

I wanted to ask about your valves floating. It would seem to me that the
springs are quite not up to the task of controling the valves. I don't think a little less preload on the lifters would make a difference.

Are you using the regular AFR springs or the upgraded ones?

I've seen many folks get pretty good results with that cam.

Later
Grady

 

HoofnIt

Founding Member

Jan 8, 2001

1,175

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36

North Carolina

Nov 9, 2004

#10

• Nov 9, 2004

• #10

Grady, the preload may not be affecting the valve floating but they are a little too noisy. The springs are not the upgraded versions. However, I am using 1.7 rockers. From the graphs it doesn't appear to be making much power past 5500 rpms so I don't see a need to run it past 57 or 5800 when I go to the track.

 

Killercanary

The car that set the bar.

Founding Member

Nov 29, 1999

5,676

1

76

Altoona, PA

Nov 10, 2004

#11

• Nov 10, 2004

• #11

JFYI- I don't have the spring upgrade and I shift at 6000rpms and I have made dyno pulls to 6300.

 

tmoss

Gettin Wired

Founding Member

Jun 28, 2001

7,153

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128

Saint Louis, MO

Nov 10, 2004

#12

• Nov 10, 2004

• #12

Please don't look at a new intake until you get the valve train fixed - that could be holding the power down, not the intake. If it was ported correctly, it will make a lot of power. Here is the dyno results of one of my recent customers who went to a RPMII and lost lots of troque and power under 5,200 rpm compared to his ported Explorer.........

 

VibrantRedGT

"STANGNET'S PENGUIN SMACKER"

15 Year Member

Nov 29, 1999

14,679

424

154

Boca Raton, Florida

Nov 10, 2004

#13

• Nov 10, 2004

• #13

That's my favorite cam. I miss that thing. Good numbers!

 

Killercanary

The car that set the bar.

Founding Member

Nov 29, 1999

5,676

1

76

Altoona, PA

Nov 10, 2004

#14

• Nov 10, 2004

• #14

tmoss said:

Please don't look at a new intake until you get the valve train fixed - that could be holding the power down, not the intake. If it was ported correctly, it will make a lot of power. Here is the dyno results of one of my recent customers who went to a RPMII and lost lots of troque and power under 5,200 rpm compared to his ported Explorer.........

Click to expand...

Hmmm... I wonder which one I'd rather have and which one would be quicker. HINT HINT... it's not the RPM II! Thus another example of "bigger isn't always better."

 

Jo_885o

New Member

Jul 17, 2003

422

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Clint. Twp, Michigan

Nov 10, 2004

#15

• Nov 10, 2004

• #15

What are the specs of that crowler cam?

 

T

Touring23

Founding Member

Dec 29, 2001

294

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Washington

Nov 10, 2004

#16

• Nov 10, 2004

• #16

Final5-0, I sent you a PM offline & sort of off-topic. thx.

 

Joes95GT

New Member

Jan 23, 2003

3,132

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Delaware

Nov 10, 2004

#17

• Nov 10, 2004

• #17

I agree with the guys on the valvetrain; Grady especially.

120# on the seat is not nearly enough pressure, and I'd imagine that the open pressure is in the 330-340# range. Just as a reference, my springs at 142# on the seat and 405# open. The springs aren't up to it. I hope for your sake that it is just a lifter preload issue, but I don't see that being the problem

Paul, I NEVER knew you were still running the stock AFR springs! Maybe AFR used to use a beefier spring "back in the day" when their SBF market wasn't so big? That's incredible, but kind of scary at the same time.

Joe

 

go.rei GT

New Member

Nov 29, 2003

267

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Az

Nov 10, 2004

#18

• Nov 10, 2004

• #18

What dyno did you go to, and what did they do to tune it? Did you still have pinging after putting on the AFR's?

 

final5-0

Mustang Master

Apr 6, 2003

6,817

12

79

DFW Texas

Nov 10, 2004

#19

• Nov 10, 2004

• #19

A thought or maybe it is a Q, it don't matter. Paul says he has same springs as HoofnIt and has no valve float plus higher rpms.

HoofnIt is using 1.7 rr's. I don't think Paul is and that extra lift just might be the difference that is causing the float.

Later
Grady

 

Chythar

Recently finished repairing my rear

20+ Year Stangneter

Aug 26, 2004

2,373

140

113

Foothill Ranch, CA

Nov 10, 2004

#20

• Nov 10, 2004

• #20

As to losing power after 5000rpm, are your distributor & coil stock? If so, you may want to upgrade them. My stock V8 felt like it was losing some power around the 5000rpm range, just before my pig-of-a-AODE would upshift. I added a Performance Distributors dizzy and coil, and the car now pulls hard until my AODE upshifts. Granted, this is a seat-of-the-pants feeling, and not backed up with dyno numbers. But I think it's worth looking into.