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View Poll Results: To Mill or not to Mill?
Swap cam only, leave heads/gaskets alone
2
11.11%
Swap cam, run thinner gasket, leave heads alone
6
33.33%
Swap cam, mill heads, run stock gasket
5
27.78%
Swap cam, mill heads, run thinner gasket
3
16.67%
Leave the set up alone/other ideas?
2
11.11%
Voters: 18. You may not vote on this poll

To MILL or not to MILL, that is the question...

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Old May 21, 2007 | 07:28 AM
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Question To MILL or not to MILL, that is the question...

I have the newer PRC Stage 2.5 5.3L (62.5 cc) heads as some of you may already know. I also run the MS3 cam on a 113 LSA, stock gaskets.

Combo made numbers in sig...HP is nice, but torque is a bit low. I decided to keep the heads. I am going to swap cams to something a little tamer with a more useable powerband for the street, something along the lines of a 228/232 112 (or 110 +2 like Pat G suggests to many people), G5X1, etcetc.

My poll is intended to get some feedback on whether or not I should mill the heads, run a thinner gasket, flycut, etc to get all my $'s worth out of the heads/cam combo.

I like the idea of just swapping the cam, it certainly easier, but if I can make the power I am making now, PLUS 400+ rwtq with the smaller cam, the money and time spent would be worth it to me...

I don't want this to neccesarily become a $ to power ratio poll, but I guess it is a factor.

Choose one of the options, and state your case.

The other helpful factor would be to suggest a cc to mill to, and a desired gasket thickness as well...Oh yeah, I only want to run pump gas, 93 octane.

THANKS!
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Old May 21, 2007 | 08:18 AM
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mill, flycut and run a MS4 on 110
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Old May 21, 2007 | 09:29 AM
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Hey Pred....I thought about the MS4, since a lot of people claim the power band is better than its older brother, the MS3.....but isn't the MS4 still a hog of a camshaft?

I was looking for something more streetable...isn't the MS4 defeating that purpose, or no? I bet the peak power and torque with that cam and milled heads would be OUT OF THIS WORLD!!
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Old May 21, 2007 | 11:02 AM
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This sounds an awful lot like the suggestion I made in one of your post weeks/months ago. If you do not want to flycut, then I think you should go with a cam very similar to what you listed (228/232, you know what i chose) and .040 gaskets. You would not want to mill your heads with that cam because I think it would put your DCR over the top. However, if you did mill the heads then you would want to go with a larger cam (like the MS4 or even your old MS3) but you would need to flycut. I do not remember if you ever posted your ICL, but I would suspect if you reused your cam you would want to advance it 4-6 degrees, but i would check with Pred, Pat to get there recommendations as they have much more experience with this than I do
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Old May 21, 2007 | 11:16 AM
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Originally Posted by BOWTIE
This sounds an awful lot like the suggestion I made in one of your post weeks/months ago. If you do not want to flycut, then I think you should go with a cam very similar to what you listed (228/232, you know what i chose) and .040 gaskets. You would not want to mill your heads with that cam because I think it would put your DCR over the top. However, if you did mill the heads then you would want to go with a larger cam (like the MS4 or even your old MS3) but you would need to flycut. I do not remember if you ever posted your ICL, but I would suspect if you reused your cam you would want to advance it 4-6 degrees, but i would check with Pred, Pat to get there recommendations as they have much more experience with this than I do

Hey bud,
I remember your suggestion...hell I have had a lot of ideas thrown at me...I am just posting to get some thoughts from others...
All of you guys are a HUGE help!
Thanks
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Old May 21, 2007 | 11:47 AM
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I would buy a set of trick flows, or ETP's, run around 11.5:1 compression without flycuting and run a slightly smaller cam if your not happy about the driveability.
The 228/232 is a good cam. I would do something along the line of a TRak or Torquer 3 myself. I personially believe there is some nice gains out of the aftermarket heads.
Not having to flycut is also a nice feature.
My suggestion.....
ETP 215 59cc heads. a Torque 3 or similar camshaft. Ported 90mm intake with a stock gasket. On the same dyno you made you numbers on another camaro with the 59cc ETP 215's, Torque 3 and non ported Fast 90 made 470 HP and 440 TQ.
THIS WAS THROUGH A stock 10 both just so your know.
But that is great power, and with a ported fast you could be in the same power range with the 12 bolt you have.
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Old May 21, 2007 | 12:18 PM
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Originally Posted by MPHmotorsports
I would buy a set of trick flows, or ETP's, run around 11.5:1 compression without flycuting and run a slightly smaller cam if your not happy about the driveability.
The 228/232 is a good cam. I would do something along the line of a TRak or Torquer 3 myself. I personially believe there is some nice gains out of the aftermarket heads.
Not having to flycut is also a nice feature.
My suggestion.....
ETP 215 59cc heads. a Torque 3 or similar camshaft. Ported 90mm intake with a stock gasket. On the same dyno you made you numbers on another camaro with the 59cc ETP 215's, Torque 3 and non ported Fast 90 made 470 HP and 440 TQ.
THIS WAS THROUGH A stock 10 both just so your know.
But that is great power, and with a ported fast you could be in the same power range with the 12 bolt you have.
Do you know what head gaskets that guy was using? If he was using anything thinner than stock then his DCR was considerably higher than Erik's. I would gamble to say if Erik's DCR was up around 8.7 he would make those numbers as well with a set of heads 1/2 the price. Unfortuneatly he would have to flycut to get his DCR up that high with his existing camshaft. I am not knocking the aftermarket heads at all, but he already has a nice set of ported stock castings that will net numbers fairly damn close..
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Old May 21, 2007 | 01:10 PM
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Other scenario,
a reverse split cam with a tight LSA like 232/228 110-1 LSA and a slight mill (PTV allowing)
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Old May 21, 2007 | 02:02 PM
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Subscribing...

We are going to end up with the same setup...lol
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Old May 21, 2007 | 02:57 PM
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Hey Tim, tell me about it...keep me posted...there are SO many dam options...
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Old May 21, 2007 | 02:59 PM
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I just read a post of a guy who is going to run an MS4 on a 110 +4....that sounds SICK...and I think even though it is a LARGE cam, something I was considering getting away from, the 110+4 may bring the powerband in a lot sooner...

Anythoughts Guru's on a cam like that?
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Old May 21, 2007 | 03:18 PM
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i wouldnt touch it spend the rest on suspension
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Old May 21, 2007 | 03:27 PM
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I have all suspension done, since '05...minus torque arm, which I will get when I order my rear
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Old May 21, 2007 | 04:56 PM
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Originally Posted by erikthegoalie
I bet the peak power and torque with that cam and milled heads would be OUT OF THIS WORLD!!
Do it! I was a little concerned about the driveability of my setup, but its worlds better than my old GTP heads/cam setup. More power everywhere, improved throttle response, and the cam just does not stop pulling. I haven't had it tuned yet, but I seriously think once tuned this car will go 10s at 3700lbs on 346" and N/A!! The only downside is that you will need to flycut.
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Old May 21, 2007 | 05:07 PM
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Originally Posted by erikthegoalie
I just read a post of a guy who is going to run an MS4 on a 110 +4....that sounds SICK...and I think even though it is a LARGE cam, something I was considering getting away from, the 110+4 may bring the powerband in a lot sooner...

Anythoughts Guru's on a cam like that?
Flycut, Flycut, Flycut...
If you are thinking of the one I think you are, he has aftermarket pistons with valve reliefs.
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Old May 21, 2007 | 05:11 PM
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Originally Posted by PREDATOR-Z
Other scenario,
a reverse split cam with a tight LSA like 232/228 110-1 LSA and a slight mill (PTV allowing)
I was under the impression these rev split cams really only worked well with stock type heads and intakes. He has the 2.5 5.3's with the 2.02 intake valve and a ported FAST 90/90. I would have thought he would be better off witha more traditional split.
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Old May 21, 2007 | 06:38 PM
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I know I would have to flycut...I dont give a ****...
I want to learn how to anyway ya know...
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Old May 22, 2007 | 01:19 AM
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Originally Posted by BOWTIE
I was under the impression these rev split cams really only worked well with stock type heads and intakes. He has the 2.5 5.3's with the 2.02 intake valve and a ported FAST 90/90. I would have thought he would be better off witha more traditional split.
It is not a matter of working better, it is a matter of valve events. One has to have the right valve events to produce a certain power range and amount at said range.
The VEs of a Reverse will produce more trq, of course this comes at the cost of acertain amount of peak HP.
Even the 90/90 is a restriction (by design) as to how much air can be sucked in through it. That is why sheet metal intakes exist.
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Old May 22, 2007 | 06:29 AM
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i think the ms4 or similar lsk intake / xer exhaust lobe on something like a 110 will net you some nice midrange and low end gains while picking up alittle hp also. flycut and get some .040 gaskets and run the numbers scr/dcr wise and mill acordingly to get up over 8:5 dcr and it should be a sweet setup and not have to spin the motor as high as you do right now.
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Old May 22, 2007 | 07:52 AM
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I say cut back on costs by just getting .040 gaskets. Than use the extra $$ for some n2o
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