upgrade cam ??

[jasonsxj]

need info on a good r.v. cam or torque cam ?? but don't won't to have it mess with the computer or anything else ?? i do have a 2000 intake and cold air intake !! any help on a good cam for the 4.0l would be great ?? and brand and power of the cam ?? did'nt search :looser: thanks jason

[RCman]

A cam alone won't add all that much power to the 4.0L.
That being said I'm running a Comp Cams A6 X4 250H-13 (SummitRacing Link to the full kit (http://www.summitracing.com/parts/CCA-K68-232-4/)) camshaft in mine with good results.

Oh, and some searching might help...

[D.I.T.A]

A cam alone won't add all that much power to the 4.0L.
That being said I'm running a Comp Cams A6 X4 250H-13 (SummitRacing Link to the full kit (http://www.summitracing.com/parts/CCA-K68-232-4/)) camshaft in mine with good results.

Oh, and some searching might help...

what differences did you feel with this cam . sorry for the hijack

[jasonsxj]

A cam alone won't add all that much power to the 4.0L.
That being said I'm running a Comp Cams A6 X4 250H-13 (SummitRacing Link to the full kit (http://www.summitracing.com/parts/CCA-K68-232-4/)) camshaft in mine with good results.

Oh, and some searching might help...
your right !! does the cam you put in mess with the computer ?? it is actually on the engine stand with 30,000 miles on it mild build stock cam though !! just thought since it was on stand might as well put a good pull'en cam in it ?? just don't want to mess anything up ??!! :dunno:

[sjkimmel99]

Crower 44243 here. Never drove the jeep (a 96) without it so can't compare to stock. The computer in mine doesn't seem to care. Not sure why it would unless it couldn't get a balanced a/f ratio.

[RCman]

what differences did you feel with this cam . sorry for the hijackCan't say about just the cam, there was other engine mods that went along with it. your right !! does the cam you put in mess with the computer ?? it is actually on the engine stand with 30,000 miles on it mild build stock cam though !! just thought since it was on stand might as well put a good pull'en cam in it ?? just don't want to mess anything up ??!! :dunno: No issues with the ECU in my '97.
If it's on the stand then you might as well...

[jasonsxj]

Can't say about just the cam, there was other engine mods that went along with it. No issues with the ECU in my '97.
If it's on the stand then you might as well...
cool thanks for the info !! anybody else ?? thanks alot :helpme:

[badron]

IMO the stock cam is sweet as is. The stock engine makes 85 % of it's max torque at idle so you going to be hard pressed to find a better bottom end cam.
Your 2000 should have one of the better stock cams for towing. In that it moves the torque peek a bit up the RPM range compared to early cams. Without giving up anything/much at the bottom.

[Talyn]

I've used the Comp Cam 68-231-4 and it plays nice with the PCM. I haven't heard of any street type cam that the PCM bitches about. I think our PCMs are actually pretty forgiving.

The reason the PCM would complain isn't due to the AFR... its due to the LSA and overlap of the valves, vacuum, and idle quality.

[Dr. Dyno]

I used to have the Crane 753905 cam (almost identical spec to CompCams 68-231-4) in my 4.6 stroker until I had to swap my old stock cam back in. No significant difference between the two performance-wise but with the stock cam/valve springs, I don't have any valvetrain noise and the engine's sweeter.

[jasonsxj]

thanks guys alot of good info !!~

[selarep]

The valve springs in the kit listed above wont work! Heads up.

[RCman]

The valve springs in the kit listed above wont work! Heads up.
Are you talking about the K68-232-4 kit I linked here (http://www.summitracing.com/parts/CCA-K68-232-4/)? If so, you are correct, they are for a 258 and won't work.
I linked the wrong one (right cam, wrong kit/package), I am using this Comp Cams SK68-232-4 kit (http://www.summitracing.com/parts.aspx?sku=CCA-SK68-232-4) with Mopar Performance springs.

[selarep]

Exactly. I called comp cams and they told me the valve springs in that kit are the wrong ones. They suggested to used mopar springs. If they know those springs won't work, why do they sell that kit?

[RCman]

If they know those springs won't work, why do they sell that kit?
...they are for a 258 ...


:)

[jasonsxj]

Are you talking about the K68-232-4 kit I linked here (http://www.summitracing.com/parts/CCA-K68-232-4/)? If so, you are correct, they are for a 258 and won't work.
I linked the wrong one (right cam, wrong kit/package), I am using this Comp Cams SK68-232-4 kit (http://www.summitracing.com/parts.aspx?sku=CCA-SK68-232-4) with Mopar Performance springs.
can you tell a big difference in the cam swap ? like you would in a v8 ??

[RCman]

can you tell a big difference in the cam swap ?
Like I mentioned when Nick (D.I.T.A (http://www.naxja.org/forum/member.php?u=39028)) asked, I really can't say as there was a whole heck of a lot else that changed with the engine when it went back it. I'm sure there was a difference, but I can't tell which was from what. It does idle smoother than a stocker though.
like you would in a v8 ??
I think a cam swap would have much more effect on a typical V8 than our I6's.

[Talyn]

Same here. When I put the 68-232-1 into my 4.0L I also did a head swap and header at the same time, but the combo of all that felt quite a bit different.

[selarep]

I'm putting in the extreme cam and comp cams timing set this week, its a stock motor but the head is getting a lot of work done. .030" take off, a extensive valve job and some minor polishing on the ports. I had to use the mopar springs too.

[Talyn]

If its not too late check out the JP Performance billet timing set.

[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