Which Mopar cam to go with the low buck stroker?

[floundering]

So far got the KB IC944 .060 over
Scat crank
Perfect Circle rings

I will be using this as my daily driver and from doing searching a little here, it seems the wider cam lobes have better longevity?

So I'm thinking the 4529228 or 4529229. I mostly do around town driving but can be aggressive at times so I'm really after low down torque.

I also see Mopar recommends different springs with the 4529229 cam but some people seem to be using it with factory springs. Which ones to go with?

Also, I see the recipe says to mill the deck .020" . Am I really going for a 0 deck? Should I have the machine shop mock it up then shave it? Will I be running premium with this?

[Muad'Dib]

The P4529229AC uses stock springs just as the 228. Its the 230 that wanted different springs (and isn't made anymore).





I went with the P4529215 on my 229 which is the same as the P4529214 except that its a Conical (stock) versus Cylindrical. The Cylindrical springs also have an inner spring (Damper) that I did not want.

[floundering]

I'll use the 4529229 cam and I'll go with the P4529215 springs as well. Can I use the stock retainers with them?

Am I shooting for a zero deck on this build or just taking .020" off per the recipe? I know this affects the compression ratio and quench but don't really understand what that equates too.

[gradon]

The 29 has less overlap than the stock cams, so will build torque earlier and have a higher DCR. It is good that you will be using the deeper dish ICs(compared to off-the-shelf 4.0 pistons) and it will be good to zero deck the block. I'm using the 30.

[Muad'Dib]

Can I use the stock retainers with them?

When I put mine together I purchased new springs, but re-used the retainers and locks from the head that I was using. In all reality you could probably re-use the springs too.. but I wanted the peace of mind.

[floundering]

I found some specs on another forum for the valve springs. I was about to order the 4529215 but they're quite a bit lighter than what Mopar recommends for 229 cam. Have you had any problems in the upper rpms with the 9215s Muad'Dib?

P4529215 - single spring, no damper. Good for up to 0.430" lift. Conical. Stock replacements. 79# at 1.640" (closed, on the seat).
P4529214 - single spring w/damper. Good for up to 0.430" lift. Cylindrical springs. 120# at 1.640".
P5249464 - recommended for their 0.450" 4.0L cam. These are also recommended for 5.2/5.9L V-8s. 0.400-0.525" lift, single spring w/damper. 270# at 1.640".

[Muad'Dib]

I found some specs on another forum for the valve springs. I was about to order the 4529215 but they're quite a bit lighter than what Mopar recommends for 229 cam. Have you had any problems in the upper rpms with the 9215s Muad'Dib?

P4529215 - single spring, no damper. Good for up to 0.430" lift. Conical. Stock replacements. 79# at 1.640" (closed, on the seat).
P4529214 - single spring w/damper. Good for up to 0.430" lift. Cylindrical springs. 120# at 1.640".
P5249464 - recommended for their 0.450" 4.0L cam. These are also recommended for 5.2/5.9L V-8s. 0.400-0.525" lift, single spring w/damper. 270# at 1.640".

No

[SilverXJ]

Isn't the 9215 just a stock replacement spring with a high price?

[Muad'Dib]

Isn't the 9215 just a stock replacement spring with a high price?

9214 is the higher price stock replacement. 9215 cost less (but still may be considered pricy)

[floundering]

I think the stock spring is listed as 66-74 foot lbs. closed so I think the 9215s would be probably about equal.

The 9214s however are listed at 120 lbs., little bit more than the stock ones. Perhaps this is why Mopar recommended this number for their two milder performance cams.

[Muad'Dib]

I think the stock spring is listed as 66-74 foot lbs. closed so I think the 9215s would be probably about equal.

The 9214s however are listed at 120 lbs., little bit more than the stock ones. Perhaps this is why Mopar recommended this number for their two milder performance cams.

That's assuming the lb rating for the springs given above are accurate. I haven't seen anything from Mopar/Jeep that state spring rates for the two springs; although I can see a damper spring increasing the spring rate as suggested.

I can tell you though that the 9215's work just fine with the 229AC as that is what I am running in my 4.7 without issue.