2008 ROUSH Stage 3 Build...Take III

[JoshK]

^yes sir, you are correct again! All I know is I am glad you showed me that calculator so I could be sure for myself that the pistons are right

 

[05stroker]

^yes sir, you are correct again! All I know is I am glad you showed me that calculator so I could be sure for myself that the pistons are right

I edited that post to reflect that my head hurts now...

 

[JoshK]

What the calculator calls for they would be the same yes. Mine are further from what the calculator calls for which gives me more clearance as I am seeing it. Missed that myself lol.

All I know is I am glad to see I will have the clearance needed.

 

[AutoXRacer]

Update!!!

Stiegy has my blower and the new VMP Gen2 case. Damage on the rotors is repairable; not minor, but not major either. BTW, you can't buy replacement rotors...you have to purchase a brand new blower. sigh

I also got my pistons today...finally after 3-4 weeks.

Now for the comparison between the JDM piston and the MMR:

Its interesting to see the differences in design. The JDM version has a shallower top and shorter skirts, while the MMR has a deeper and more traditional top with longer skirts.

What do these differences equate to when the motor is operating???

BTW, I regret getting the coating. I took a 2-3 week hit and after looking at it, not sure I like it. Almost looks like a rubberized powder coat.

 

[santi_bh88]

I would never put those pistons.. I would prefer to see them above the fireplace

 

[Wes06]

Wonder if they use the same paint on their pistons they used on their oil pumps. Lol

 

[AutoXRacer]

Wonder if they use the same paint on their pistons they used on their oil pumps. Lol

What happens to the coating on their oil pumps?
Frankly, I am not impressed with the coating. I guess I was expecting some type of anodized type coating versus an actual rubberized/vinyl type coating. I'll be dropping them off to my engine builder this afternoon. I am predicting I will get an earful... sigh

 

[lito]

Is it me or the whole ring stack is lower?

 

[AutoXRacer]

Is it me or the whole ring stack is lower?

I thought it was...but I don't think so. Referencing this picture:

I think the ring stack is the same, but seems like the top is thicker (not sure what the technical name is).

Looking at this picture, I think the spacing between the rings is different.

I wish I would have looked at this closer. I would have pulled out the rings out of the JDM piston and compared closely.

So I think yes, the ring stack (top and second ring are lower) is slightly lower from the top edge.

Is this a problem? What does this do?

 

[lito]

The top ring distance looks to be bigger in the new one, 2nd to oil control looks smaller too and the oil control looks closer to the pin.

 

[blownGTvert]

Looks like Manley makes them both. Why not call them to inquire on the differences and pros/cons of each?

 

[Wes06]

http://www.s197forum.com/forum/showthread.php?t=119200&highlight=MMR+oil

That's the oil pump I was referencing

 

[AutoXRacer]

The top ring distance looks to be bigger in the new one, 2nd to oil control looks smaller too and the oil control looks closer to the pin.

So what does this mean?

Looks like Manley makes them both. Why not call them to inquire on the differences and pros/cons of each?

They are both Manley pistons...same base piston, just different cut/design. The numbers underneath the piston match each other.

http://www.s197forum.com/forum/showthread.php?t=119200&highlight=MMR+oil

That's the oil pump I was referencing

OMG, this is what I was afraid of. I will call Manley ASAP and I am sure Chuck my engine builder will verify this too. He won't build a motor with questionable concerns. Its his way or the highway. lol

I did find some flash or what seemed like rubberized flash that was stuck to the piston. Like when you do painting at home and you remove the blue tape and you get a little flashing from the paint where it got stuck on the tape and the wall.

I am very concerned with this "coating" and the long term survivability. Will it start flaking off (specifically the underside of the piston) and clog my oil pump screen? The top I am not too concerned with since I would expect it if it were to fail, to blow out the exhaust.

DAMN YOU WES!! I am officially stressing out now!! I seriously expected some type of hard anodized finish and not an actual coating (what seems like a rubberized coating).

 

[Wes06]

Hah sorry to ruin your heart health. I've just seen enough MMR posts on here I wouldn't trust and of their stuff. They may have some good parts, but when there's a bad part that's when it turns south really quick

 

[rednek01]

So what does this mean?




They are both Manley pistons...same base piston, just different cut/design. The numbers underneath the piston match each other.





OMG, this is what I was afraid of. I will call Manley ASAP and I am sure Chuck my engine builder will verify this too. He won't build a motor with questionable concerns. Its his way or the highway. lol

I did find some flash or what seemed like rubberized flash that was stuck to the piston. Like when you do painting at home and you remove the blue tape and you get a little flashing from the paint where it got stuck on the tape and the wall.

I am very concerned with this "coating" and the long term survivability. Will it start flaking off (specifically the underside of the piston) and clog my oil pump screen? The top I am not too concerned with since I would expect it if it were to fail, to blow out the exhaust.

DAMN YOU WES!! I am officially stressing out now!! I seriously expected some type of hard anodized finish and not an actual coating (what seems like a rubberized coating).

When you say its rubberized all I can think is they paid some ricer kid to plasti-dip your pistons red.

 

[Wes06]

That's what I'm imagining. Wondering if its just a texture thing. Or if it actually feels like rubber

 

[AutoXRacer]

I can't say for sure... There was a little flash right at the lower edge of the oil ring gap. I just pulled it off...it felt rubbery or vinyl like (I'm sure I am wrong but thats the closest I can compare it to that I have personally seen).

According to MMR, they worked with Manley to come up with this specialized coating.
I need to call Manley.

A good sign is that I don't see that MMR offers coated oil pumps.
I think that thread above, the owner most have painted that oil pump.

 

[lito]

So what does this mean?

Having the top ring lower is usually good for FI due to it being farther from the heat, OEM tries to avoid this as it can for emissions purposes, the bigger the distance, the bigger the pocket and usually the charge that goes there goes unburnt which will affect HC emissions so they try to reduce the pocket all they can with tighter tolerances and higher rings.

 

[lito]

A good sign is that I don't see that MMR offers coated oil pumps.
I think that thread above, the owner most have painted that oil pump.

They did offer them.

 

[AutoXRacer]

Having the top ring lower is usually good for FI due to it being farther from the heat, OEM tries to avoid this as it can for emissions purposes, the bigger the distance, the bigger the pocket and usually the charge that goes there goes unburnt which will affect HC emissions so they try to reduce the pocket all they can with tighter tolerances and higher rings.

Interesting, so this is good!!
One positive... lol