upgrade cam ??

[selarep]

The comp cams set was only $45

 

[crusTodd]

On the JeepStrokers forum, it has been suggested you can use Yella Terra 1.7 ratio RR's. This give some of the effect of a high lift cam, but with the stock profile. This would be a more expensive route, for sure. I assume you would need different springs. Anyone have an insight on this approach?

crust1

 

[selarep]

Those rockers are a great combo with the yella terra 1.6 rockers, any of the extreme cams or crane cams with a similar profile and the mopar springs listed for the highest cam mopar makes.

 

[Talyn]

Those rockers are a great combo with the yella terra 1.6 rockers

What?

 

[selarep]

hah, sorry, I added rockers to that sentence.

 

[POLAR_JEEP_04]

part number on the mopar springs? where do you get them? the dealership?

might need new lifters so i plan on swaping in the comp sk68-232-4 with mopar springs in a 97 4.0 any advice?

 

[Talyn]

You NEED new lifters with a new cam, its not an option.

Part numbers for the springs:
valve springs Mopar Performance #5249464
retainers Mopar Performance #4452032 (8*) 8mm
locks Mopar Performance #4529218 (8*) 8mm

Check on line before the dealership. Also try Advance. On the dealers someone posted on here that one dealer is giving a steep discount on your first order.. may want to do a search for that.

 

[POLAR_JEEP_04]

You NEED new lifters with a new cam, its not an option.

thanks for the info! I meant that I need new lifters now so might as well swap in a cam at the same time.

 

[POLAR_JEEP_04]

You NEED new lifters with a new cam, its not an option.

Part numbers for the springs:
valve springs Mopar Performance #5249464
retainers Mopar Performance #4452032 (8*) 8mm
locks Mopar Performance #4529218 (8*) 8mm

Check on line before the dealership. Also try Advance. On the dealers someone posted on here that one dealer is giving a steep discount on your first order.. may want to do a search for that.

WOW!!! $$$ Im re-thinking this cam thing now!

 

[Talyn]

The Mopars are expensive, butt hey are pretty much drop in.

There are other spring options, but you have to do some research and see what fits. Look at catalogs of companies that make springs. The install height for the 4.0L head is 1.64". You want 100-110 lbs of seat load. I wouldn't go with a high rate spring as the cams we use are fairly mild. If you are staying with stock valves, the single groove stem is easier to find locks for than the 3 groove. Keep in mind that they are the bead style locks as well. Also, make sure the spring can provide enough room before solid height for the cam you choose. Depending on the spring you may need the have either the valve seat deepened or widened and you will want to keep the cost of that in mind. You may also want to talk your machinist about spring recommendations.

 

[POLAR_JEEP_04]

I know ill need 12 springs but how many retainers and locks will i need? im not really sure what those are.

 

[gradon]

12 retainers, 24 locks

 

[POLAR_JEEP_04]

would i have to swap in single groove valves with the comp cam and mopar springs? I read that I would have to on hescos site if I used their cam. wasn't sure if this one was the same.

what is the "break-in" procedure for the comp cam?

 

[Frank Z]

http://shop.505performance.com/product.sc?productId=178&categoryId=23

 

[POLAR_JEEP_04]

That's too much money for me

 

[POLAR_JEEP_04]

what makes it worth over $400 more then that comp cam with mopar springs?

is it worth it? whats the break in like for both the comp cam and the 505?

 

[Frank Z]

Couldn't tell ya. I posted the link because someone is always asking about roller cams and lifters for 4.0L motors...and now there is one that doesn't require a custom grind on a cam blank.

As far as break in is concerned:
http://www.hotrodders.com/forum/roller-cam-break-59091.html

 

[POLAR_JEEP_04]

What makes rollers better? Sorry I'm a cam noob

 

[Talyn]

Roller cams don't have a break in period. Roller cams are suppose to have a longer life with modern oils however, 505's isn't that way. They do offer more aggressive profiles though.

http://www.naxja.org/forum/showthread.php?t=918403&page=4