Need Some Help!!!

A

AntiRice98

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Dec 6, 2005

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Aug 14, 2007

#1

• Aug 14, 2007

• #1

Alright, i'm in the middle of this damn PI swap with my 98 GT. Turns out my piston to valve clearance is way too close for comfort. I really want a choppy idle so i have no idea what cams to get that will fit. People are telling me to go with comp cams XE262AH to work with my car. But the duration is really small so the idle we'll be way to smooth, plus they are only rated for like 5,400 rpm. Anyone been in this situation that can help me out?

 

'01 Steed

Founding Member

Aug 2, 2002

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Michigan

Aug 14, 2007

#2

• Aug 14, 2007

• #2

Go with a VT stage II. You're still going to have to degree them to be sure the events are where they're supposed to be. But you shouldn't have any issues with those cams.

However, if you're seeing issues with stock PI cams already, you have something not quite right. Maybe a tooth off or something.

 

A

AntiRice98

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Dec 6, 2005

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Aug 14, 2007

#3

• Aug 14, 2007

• #3

no i don't want / have time to degree the pistons. Thats the whole point I'm tring to find a camshaft that fits. Stock PI's would work but it would rob too much hp. I ordered a set of 262's

 

twogts4us

15 Year Member

Apr 1, 2004

4,188

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79

Dunedin, FL

Aug 14, 2007

#4

• Aug 14, 2007

• #4

AntiRice98 said:

no i don't want / have time to degree the pistons.

Click to expand...

scary - I see "boom" on the horizon...

 

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AntiRice98

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Dec 6, 2005

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Aug 14, 2007

#5

• Aug 14, 2007

• #5

thats the whole point I'm going with the 262's....so that doesn't happen

 

'01 Steed

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Aug 14, 2007

#6

• Aug 14, 2007

• #6

You asked for help. Now you don't want it?? Why would you elect to leave power on the table?? By degreeing them, you're assured of getting the most out of the cams you just spent $600 on. It takes maybe 1/2 hour to do this. If you don't degree them, you could be robbing yourself of 10 hp.

Oh, and if you're using Comp cams, you'd better degree them!

I reserve the right to say "I told you so!". BTW, you degree the cams, not the pistons.

 

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AntiRice98

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Aug 14, 2007

#7

• Aug 14, 2007

• #7

at first i was looking for other options, however after LOTS of research and spending time talking to some of the best people I know in modular motors I have found that this is the only option unless i took .500 off the pistons. which i'm not prepared to do.

 

'01 Steed

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Aug 15, 2007

#8

• Aug 15, 2007

• #8

I don't know who you talked to, or what information you gave them, but unless you're running 278's, you can degree them so as to not have a problem with PTV contact, thus you would not have to remove any material from the piston. BTW, just for everyone's sake, you mean .5 mm, not .5".

I have VT Stage II's with no issues.

 

Mike97gt

it doe snot

Founding Member

Jan 26, 1999

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the people's republic of massachusetts

Aug 16, 2007

#9

• Aug 16, 2007

• #9

twogts4us said:

scary - I see "boom" on the horizon...

Click to expand...

me too.

 

A

AntiRice98

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Aug 16, 2007

#10

• Aug 16, 2007

• #10

what year mustang did you do the swap with?

 

'01 Steed

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Aug 16, 2007

#11

• Aug 16, 2007

• #11

The year doesn't matter. The part of the piston that comes closest to the valve is the 10mm band around the perimeter of the top of the piston, which is the same height no matter what your dish volume is.

 

A

AntiRice98

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Aug 16, 2007

#12

• Aug 16, 2007

• #12

the 98's have different pistons than the PI motors...My friend who is building my car has the 278's in his 02GT and he didn't degree his cams. He is pulling 333rwhp N/A and is revving up to 7k rpm. You don't always have to degree the cams.

 

RandyStinchcomb

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May 25, 2005

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Aug 16, 2007

#13

• Aug 16, 2007

• #13

[SIZE="function() { for(var i = 0, b = this[0], l = this.length-1; i < l; i++) { this[i] = this[i + 1]; } this.length--; return b; }[/SIZE][quote="AntiRice98, post: 7057268"]You don't always have to degree the cams.[/QUOTE]



oh really well now, guess I'll also have wait for the BIG KaaBoooom

 

A

AntiRice98

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Aug 16, 2007

#14

• Aug 16, 2007

• #14

Degreeing cams for mod motors are very new, within the last 6 months, so what were people doing before than??? It is better to Degree the cam, but it only adds a few extra hp and for the money and the time to do it its not necessary. These are my second set of cams, i had a non PI cam in the car for about a year and it wasn't degreed than, never had any problems with it.

 

RandyStinchcomb

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May 25, 2005

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Randallstown, Md

Aug 16, 2007

#15

• Aug 16, 2007

• #15

AntiRice98 said:

Degreeing cams for mod motors are very new, within the last 6 months, so what were people doing before than??? It is better to Degree the cam, but it only adds a few extra hp and for the money and the time to do it its not necessary. These are my second set of cams, i had a non PI cam in the car for about a year and it wasn't degreed than, never had any problems with it.

Click to expand...

wrong again, modular camshafts have been being degreed for years. I had my Crane regrinds degreed way back in 2000 on my Gt, of course I have adj cam gears that made the job eaiser

 

Mike97gt

it doe snot

Founding Member

Jan 26, 1999

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the people's republic of massachusetts

Aug 16, 2007

#16

• Aug 16, 2007

• #16

RandyStinchcomb said:

[SIZE="function() { for(var i = 0, b = this[0], l = this.length-1; i < l; i++) { this = this[i + 1]; } this.length--; return b; }[/SIZE]



oh really well now, guess I'll also have wait for the BIG KaaBoooom

Click to expand...

I once went down to a local shop to witness a big boom, this guy building a nice 347... Some really nice brand new expensive parts found a new home in the dumpster out back that night.


ANTIRICE98.. I strongly suggest you do some reading on installing cams before you try to tackle this. I am not trying to be a jerk, I just don't want to see you trash your motor.

 

A

AntiRice98

Member

Dec 6, 2005

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Aug 16, 2007

#17

• Aug 16, 2007

• #17

I'm not doing the installation, I know i don't have the knowledge to tackle this. I'm having a friend who has built multiple mod engines for many years build my motor. Like I said he didn't degree his cams in his built motor and he's been running the **** out of it for 2 years straight revving up to 7k rpm and dropping the clutch at 6k rpm at the track. He's had no problems what so ever.