more RPMS?

87Mustang351

Member

Sep 12, 2005

220

1

16

Canada, Nova scotia, Cape Breton

Mar 26, 2007

#1

• Mar 26, 2007

• #1

hey everyone i had a street donimator intake with a unknown cam and lifters, i upgraded to a 274 XE cam, and a eddy RPM air gap intake, with new lifter, with my old setup i ran my car at 5,800 RPMS, i was wondering how much more i can rev my car with the new setup if its possiable at all..thanks alot

TOdd.B

 

87Mustang351

Member

Sep 12, 2005

220

1

16

Canada, Nova scotia, Cape Breton

Mar 26, 2007

#2

• Mar 26, 2007

• #2

ttt

 

dragnazz5.0

My "0" key d0esn't w0rk, s0 I have t0 use the zer0

Nov 19, 2005

815

5

18

mooresville, nc

Mar 26, 2007

#3

• Mar 26, 2007

• #3

its gonna depend on the heads really. what heads are you running? more than likely if they are stock heads you wont get much more rpm out of the combo but if they are decent heads than you might get a couple hundred more

 

8

86bluecobra

Advanced Member

Dec 20, 2004

4,265

12

69

B.C. Canada

Mar 26, 2007

#4

• Mar 26, 2007

• #4

Yes heads are a big factor but the valve springs are a bigger issue. If you didn't install new springs to match the cam and you were experiencing valve float then it will be the exact same no matter what cam you install.

 

dragnazz5.0

My "0" key d0esn't w0rk, s0 I have t0 use the zer0

Nov 19, 2005

815

5

18

mooresville, nc

Mar 26, 2007

#5

• Mar 26, 2007

• #5

86bluecobra said:

Yes heads are a big factor but the valve springs are a bigger issue. If you didn't install new springs to match the cam and you were experiencing valve float then it will be the exact same no matter what cam you install.

Click to expand...

very true...i didnt think about that.

 

87Mustang351

Member

Sep 12, 2005

220

1

16

Canada, Nova scotia, Cape Breton

Mar 26, 2007

#6

• Mar 26, 2007

• #6

well i installed a 274XE cam, and i have 1970 heads, off a windsor, was told they are slightly ported n polished, not sure on the valve springs tho

 

87Mustang351

Member

Sep 12, 2005

220

1

16

Canada, Nova scotia, Cape Breton

Mar 26, 2007

#7

• Mar 26, 2007

• #7

anyone elsee?

 

87Mustang351

Member

Sep 12, 2005

220

1

16

Canada, Nova scotia, Cape Breton

Mar 27, 2007

#8

• Mar 27, 2007

• #8

????? ttt again

 

B

brands5.0

Founding Member

Jun 25, 2001

577

0

17

miami ,florida

Mar 27, 2007

#9

• Mar 27, 2007

• #9

Like thay said above if you didnt change out the springs to match the cam then you'll get float at about the same rpm you did before.

 

87Mustang351

Member

Sep 12, 2005

220

1

16

Canada, Nova scotia, Cape Breton

Mar 27, 2007

#10

• Mar 27, 2007

• #10

ok thanks, maybe ill look into springs, do the heads have to come off to change them out?

 

B

brands5.0

Founding Member

Jun 25, 2001

577

0

17

miami ,florida

Mar 28, 2007

#11

• Mar 28, 2007

• #11

No the heads do not need to come off. Your new cam should have came with a recommendation of what springs were needed.

 

87Mustang351

Member

Sep 12, 2005

220

1

16

Canada, Nova scotia, Cape Breton

Mar 28, 2007

#12

• Mar 28, 2007

• #12

ok ill check the box, thanks alot