Safe rpm to shift at?

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StarFox07

New Member

Jun 10, 2005

71

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Texas

Jun 23, 2007

#1

• Jun 23, 2007

• #1

I just put an E303 in my car and it now pulls pretty strong to ~6500 rpm. Is that to high for a stock bottom end 5.0? My car, for some reason or another, has no rev limiter so I dont really know how high is too high. Advice appreciated.

 

88mouse

New Member

Apr 18, 2007

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Mooresville nc

Jun 23, 2007

#2

• Jun 23, 2007

• #2

are you going by the stock tach? they are off pretty bad.

 

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StarFox07

New Member

Jun 10, 2005

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Texas

Jun 23, 2007

#3

• Jun 23, 2007

• #3

high or low?

 

Hickfied

Member

Nov 9, 2005

413

0

16

Morganton, NC

Jun 23, 2007

#4

• Jun 23, 2007

• #4

High. You have a 6250 rev limiter. Take her to it.... But get some new valve springs first.

 

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StarFox07

New Member

Jun 10, 2005

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Texas

Jun 23, 2007

#5

• Jun 23, 2007

• #5

Ok so is it normal for the tach to be reading 7,000rpm and still not hit the 6250 limiter yet?

 

Hickfied

Member

Nov 9, 2005

413

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16

Morganton, NC

Jun 23, 2007

#6

• Jun 23, 2007

• #6

I've seen it, and others have said they have too, so I think so. Has your car ever had a tune?

 

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StarFox07

New Member

Jun 10, 2005

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Texas

Jun 23, 2007

#7

• Jun 23, 2007

• #7

not under my ownership, and the previous owner knows nothing, hes a complete toolbag.

 

blackened88lx

Active Member

Aug 9, 2006

0

4

28

Connecticut

Jun 23, 2007

#8

• Jun 23, 2007

• #8

Yes, the tach can be that far off. Mine reads a little over 7 when hitting the 6250 rpm rev limiter. Just shift it when it stops pulling. It won't pull over 5500 with the mods you have, and that's not enough to hurt it.

 

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StarFox07

New Member

Jun 10, 2005

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Texas

Jun 23, 2007

#9

• Jun 23, 2007

• #9

My engine is cammed. It still wont pull past 5500?

 

25thmustang

Mustang Master

Sep 5, 2003

2,021

85

99

Montgomery, NY

Jun 23, 2007

#10

• Jun 23, 2007

• #10

It should pull to 5500-5700 alright. With the stock tach though, that 5500 could be 5000, who knows. Drive it until it stops pulling, or get a shift light!

 

Aliate X

Member

May 9, 2005

602

1

18

Rockland NY

Jun 23, 2007

#11

• Jun 23, 2007

• #11

StarFox07 said:

My engine is cammed. It still wont pull past 5500?

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a cam alone is not going to make your car pull past 5500 very much at all, get some heads and an intake to match and your car will scream right up to the rev limiter.

 

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fordguy87

Member

Jul 15, 2005

47

0

6

PA

Jun 24, 2007

#12

• Jun 24, 2007

• #12

we've revved past 7 in my cousins 87 and didn't find the rev limiter thought it was gonna blow up haha

 

blackened88lx

Active Member

Aug 9, 2006

0

4

28

Connecticut

Jun 24, 2007

#13

• Jun 24, 2007

• #13

fordguy87 said:

we've revved past 7 in my cousins 87 and didn't find the rev limiter thought it was gonna blow up haha

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What's done to the car? Again, the tach could be off. The limiter is at 6250, and you would need a pretty serious combo to be near or over 7k if there was no limiter for some reason.

 

grey5.0beast

Cookies should never be DUNKED!!!

Aug 3, 2004

0

1

0

atl ga

Jun 24, 2007

#14

• Jun 24, 2007

• #14

One time racing an 05+ stang on the hwy my pedal got stuck under my carpet at WOT and when I let off I didn't realize this, I pushed in the clutch and it shot straight to pegging the tach and bouncing off the rev limiter, so it was well over 7k on the stock tach, but really only 6250.

 

bad98rt

New Member

Mar 27, 2006

7

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Indiana

Jun 24, 2007

#15

• Jun 24, 2007

• #15

Waiting to shift until it stops pulling. Isn't that pretty bad for the engine. It's happend to me once and I thought I was gonna blow the motor. Although I do feel a tad better now that you guys say that the tachs are off.

 

4G-KDMP

10 Year Member

Jul 23, 2005

935

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39

CA

Jun 24, 2007

#16

• Jun 24, 2007

• #16

shift just before you hit the rev limiter.....on whatever tach you're using.

 

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StarFox07

New Member

Jun 10, 2005

71

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0

Texas

Jun 24, 2007

#17

• Jun 24, 2007

• #17

alright this is dumb, i'm just getting a monster tach, at least 9 inches.
































I think i'll just get a shift light.

 

blackened88lx

Active Member

Aug 9, 2006

0

4

28

Connecticut

Jun 25, 2007

#18

• Jun 25, 2007

• #18

4G-KDMP said:

shift just before you hit the rev limiter.....on whatever tach you're using.

Click to expand...

You are joking right??