GT40P's Stock Cam?

stangzroastrice

Founding Member

Aug 5, 2002

278

0

16

Belmar, NJ (Jersey Shore)

May 20, 2007

#1

• May 20, 2007

• #1

Hey guys, after all that debate about the xe270hr-14, i got to thinking. i am on a budget and i already have the stock cam, so on an untouched explorer motor with supporting bolt-ons, what kind of numbers N/A would i be looking at with our stock cam retarded 4 degrees with 1.7 rockers??? Based on some research, it seems as if this makes for a killer street setup (low end torque), its a stock cam so the drivability will still be awesome, and will be perfect for forced induction down the road. What do you guys think???

 

final5-0

Mustang Master

Apr 6, 2003

6,817

12

79

DFW Texas

May 20, 2007

#2

• May 20, 2007

• #2

As for backing up the cam

I don't see the procedure as anything that would give a gain

It should shift the power band up a bit

Grady

 

stangzroastrice

Founding Member

Aug 5, 2002

278

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16

Belmar, NJ (Jersey Shore)

May 20, 2007

#3

• May 20, 2007

• #3

i'm new to the whole advancing and retarding the stock cam so i may sound retarded haha, i just remember regarding a post where 25thmustang on the 5.0 tech forums retarded the cam 4 degrees on a GT40P setup and said that the combo went very well together...

 

stangzroastrice

Founding Member

Aug 5, 2002

278

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16

Belmar, NJ (Jersey Shore)

May 20, 2007

#4

• May 20, 2007

• #4

yeah guess i misinterpreted what i was reading, so what numbers would i be looking at advancing the stock cam 4 degrees along with 1.7 RR's

 

final5-0

Mustang Master

Apr 6, 2003

6,817

12

79

DFW Texas

May 20, 2007

#5

• May 20, 2007

• #5

A few rules of thumb

Advance or Retard of a cam is about shifting the power band

Advance will shift it downward for a stronger low end
Retard will of course be the opposite

Since the oem stuff falls like a rock around 5K .......
Can you see the thinking of why one might consider sacrificing
a bit of low end for additional high end

As for the rockers

If moving from oem rockers to 1.7 roller rockers ...........
One would gain from two advantages

1) Reduced friction from the rollers
2) Increased lift of the valve

The gain is gonna fall between 5 & 10 rwhp and IMHO ..........
its gonna be closer to 5 than 10 from what all I've seen

Grady

 

stangzroastrice

Founding Member

Aug 5, 2002

278

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16

Belmar, NJ (Jersey Shore)

May 20, 2007

#6

• May 20, 2007

• #6

ok makes much more sense now heh, so i've been contemplating, considering that i may change in the near future and 1.6 rockers are more favorable when it comes to P/V clearance and high lift cams, esp. with this longblock, you think i should just stick the stock 1.6 rockers on there? or would the 1.7 roller rockers be worth the investment?

 

stangzroastrice

Founding Member

Aug 5, 2002

278

0

16

Belmar, NJ (Jersey Shore)

May 21, 2007

#7

• May 21, 2007

• #7

hah figures after all that, i spontaneously found and bought a TFS Stage 1 cam for 75 bucks on another forum