dyno:(

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coupecop

New Member

Aug 9, 2006

166

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mission texas

Jun 1, 2007

#1

• Jun 1, 2007

• #1

I just had my car dyno after putting some 1.7rr and a bigger mas air the one on my sig and only made 255hp 296tq less than last time almost two month ago I changed the stock computer to the cobra com since then I have been less than when I had 65 TB 55 mas and stock rr I made 260HP 296tq with the heads cam intake I have now don't know what can be wrong

 

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coupecop

New Member

Aug 9, 2006

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mission texas

Jun 1, 2007

#2

• Jun 1, 2007

• #2

After I did the dyno I had some mis fire so changed the mas air to the 55 and that got rid of the misfire and hesitation.

 

88mouse

New Member

Apr 18, 2007

630

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Mooresville nc

Jun 1, 2007

#3

• Jun 1, 2007

• #3

aren't cobra computer tuned for 24# lb injectors?

 

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coupecop

New Member

Aug 9, 2006

166

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mission texas

Jun 1, 2007

#4

• Jun 1, 2007

• #4

I have 24# injectors and the masair for it with a 255 fuel pump

 

DucatiRdr

New Member

Nov 22, 2006

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North of Boston, Massachusetts

Jun 1, 2007

#5

• Jun 1, 2007

• #5

Was it the same dyno, same dyno tech and similar weather conditions? LOTS of things can effect a dyno read and unless you keep all of the variables to a minimum it is not unusual to see different results from different dynos...or even the same dyno. Instead of looking at peak numbers look for area under the curves and smooth lines.

 

TheBocSez

New Member

Feb 3, 2004

652

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Converse, TX

Jun 1, 2007

#6

• Jun 1, 2007

• #6

Is it possible the 1.7 are causing valve float? What shape are your springs in?

 

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coupecop

New Member

Aug 9, 2006

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mission texas

Jun 1, 2007

#7

• Jun 1, 2007

• #7

What I dont get is how the hesitatian whent away if I only changed the size of the meter not the sencer I used the one on the 80 masair

 

Ranchero5.0

The Voice of Reason

Jan 1, 1999

5,306

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76

Hagerstown MD

Jun 1, 2007

#8

• Jun 1, 2007

• #8

You can try putting the larger meter back on, leave it unbolted and the hose clamps a little loose and start the car. Then rotate the meter to see if the miss goes away. The idea behind this is all about the port flow and where the sensor element is reading the air flows.

Jamie

 

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coupecop

New Member

Aug 9, 2006

166

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mission texas

Jun 1, 2007

#9

• Jun 1, 2007

• #9

We did that in the dyno and it whent away but my power level whent to 243

 

DMAN302

My mom says thanks for the pearl necklace.

Nov 8, 2003

2,120

2

59

windsor, Canada

Jun 2, 2007

#10

• Jun 2, 2007

• #10

I was under the impression the cobra computer is calibrated for 24's and used a stock style maf...if I'm reading this correctly your added maf is calibrated for 24's. Could be your ECU is in conflict with the info your maf is providing, where the stock maf is providing correct feed info for the ECU to accomodate the larger injector. Not to mention I have seen over 10hp differences in dyno numbers just based on weather and how she was strapped down on the same machine.

 

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coupecop

New Member

Aug 9, 2006

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mission texas

Jun 2, 2007

#11

• Jun 2, 2007

• #11

Do I all think if I get a regular a9l comp my 80 mas will work so that I can ask my friend to lend me one

 

9

94v6GT

New Member

May 13, 2006

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Jun 2, 2007

#12

• Jun 2, 2007

• #12

yea if the maf is cal for 24's and your running the cobra ecu that would be a problem. change one or the other i guess

 

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coupecop

New Member

Aug 9, 2006

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mission texas

Jun 2, 2007

#13

• Jun 2, 2007

• #13

Now I'm going to have go get it tuned ! With the small masair I drove it with the small mas and it feels better