MP5T Rebuild Photo Journal
- Thread starter Brian MP5T
- Start date
- :
- MP5T / 944
TurfBurn said:fingerprint eh... wow.. talk about one thing leading to another or something!LOL.
It was so cool. I just used Mothers Metal Polish thinking it would remove the print. It also took all the CNC off. I'm obsessed I guess. I had to do the other three. I don't think I'll bother doing anything else to the piston before assembley...
Last edited:
- :
- MP5T / 944
A Bud of mine around here in Petawawa has a sick all motor Neon. Extreme Compression, Rods, Port Polish, Timing.
I asked him about Ceramic Coating my new pistons because a "Certain Member" [font="]suggested [/font] it to me. I originally thought it had little merit but this is what he said...
Quote Chris Fleury
There is merit to ceramic coating the tops of the pistons. What it does is
create a thermal barrier between the piston and the combustion chamber.
Basically it's a heat reflector. By reflecting the heat away from the
piston, you reduce the likelihood of overheating the piston, which can cause
scuffing. Also you in turn reduce the likelihood of having preignition
promoting hot spots. Lastly carbon deposits are a lot less likely to
accumulate on the piston surface. Reflecting the heat back into the
combustion chamber also increases potential power output. I have no numbers
so to speak, but when you drag race in the bug game, every bit helps. For
us, the grassroots enthusiast, I'd be more apt to invest in some moly
coating on the skirts to reduce wear, scuffing and the dreaded cold engine
piston slap which makes the engine sounds like a diesel till it warms up.
Ceramic coating the piston top will not make the piston stronger. Forged
pistons are more malleable and will deform/conform under extreme pressures
and absorb impacts rather than shatter and crack like their
cast/hypereutectic counterparts. It's like comparing cast iron and billet
steel, one will flex and has 'give' the other will crack/shatter. This makes
forged ideal for high performance applications, they are more forgiving and
will take more abuse per se.
Be forewarned, if this is your first use of forged pistons... the engine
will be noisy when cold. Gear Junkies call it 'piston purr'. I call it
piston slap. Ever hear an older 4 banger (K-car and variants) start when
cold? That 'cluck-cluck-cluck' sound ? That's piston slap !! When the piston
is cold it sits loose in the bore and actually rocks in the bore when the
rod changes angles at TDC and BDC. As it warm up, the piston expands and
tightens in the bore.
Forged pistons run loose cold clearances as the alloy expands more that
others when heated to operating temperature. That's their downfall. Cast
expand less but are weak and brittle as s***. Hypereutectic are cast as well
but with an improved alloy. Hypereutectic means that the aluminum alloy is
supersaturated with silicon, which makes it stronger and causes it to expand
much less.
Forged pistons in our small mores generally run a cold clearance of 0.0030"
(3 thou), Wiseco's do anyway.
Hypereutectic run REAL tight at an average of 0.0015" (1.5 thou)
Hence, they are quiet and start up.
Well my hands are sore so I'll leave it at that.
I asked him about Ceramic Coating my new pistons because a "Certain Member" [font="]suggested [/font] it to me. I originally thought it had little merit but this is what he said...
Quote Chris Fleury
There is merit to ceramic coating the tops of the pistons. What it does is
create a thermal barrier between the piston and the combustion chamber.
Basically it's a heat reflector. By reflecting the heat away from the
piston, you reduce the likelihood of overheating the piston, which can cause
scuffing. Also you in turn reduce the likelihood of having preignition
promoting hot spots. Lastly carbon deposits are a lot less likely to
accumulate on the piston surface. Reflecting the heat back into the
combustion chamber also increases potential power output. I have no numbers
so to speak, but when you drag race in the bug game, every bit helps. For
us, the grassroots enthusiast, I'd be more apt to invest in some moly
coating on the skirts to reduce wear, scuffing and the dreaded cold engine
piston slap which makes the engine sounds like a diesel till it warms up.
Ceramic coating the piston top will not make the piston stronger. Forged
pistons are more malleable and will deform/conform under extreme pressures
and absorb impacts rather than shatter and crack like their
cast/hypereutectic counterparts. It's like comparing cast iron and billet
steel, one will flex and has 'give' the other will crack/shatter. This makes
forged ideal for high performance applications, they are more forgiving and
will take more abuse per se.
Be forewarned, if this is your first use of forged pistons... the engine
will be noisy when cold. Gear Junkies call it 'piston purr'. I call it
piston slap. Ever hear an older 4 banger (K-car and variants) start when
cold? That 'cluck-cluck-cluck' sound ? That's piston slap !! When the piston
is cold it sits loose in the bore and actually rocks in the bore when the
rod changes angles at TDC and BDC. As it warm up, the piston expands and
tightens in the bore.
Forged pistons run loose cold clearances as the alloy expands more that
others when heated to operating temperature. That's their downfall. Cast
expand less but are weak and brittle as s***. Hypereutectic are cast as well
but with an improved alloy. Hypereutectic means that the aluminum alloy is
supersaturated with silicon, which makes it stronger and causes it to expand
much less.
Forged pistons in our small mores generally run a cold clearance of 0.0030"
(3 thou), Wiseco's do anyway.
Hypereutectic run REAL tight at an average of 0.0015" (1.5 thou)
Hence, they are quiet and start up.
Well my hands are sore so I'll leave it at that.
- :
- MP5T / 944
Here is a Picture of Chris's Neon
- :
- MP5T / 944
New Seats...Today!
black_rob00
Member
- :
- 01 Sunlight Silver ES
Nice!!!(cool)
- :
- MP5T / 944
mcstark said:
I wasn't planning on the seats till later, but a member was parting out his car and the deal was way too good to pass up... $800.00 cash CDN with bracket installed... For Both...
- :
- MP5T / 944
BTW: If you want to drive all the way up here, I would be happy to take you for a spin when it 's back together.
Engine work begins this week!
Engine work begins this week!
- :
- MP5T / 944
ahb11m said:
Where are you going to be in Canada? (shrug)
- :
- MP5T / 944
UPDATES...
Waiting of Final Paint for the Pillar...
Waiting of Final Paint for the Pillar...
- :
- MP5T / 944
Got rid of the Gap and am waiting on White paint to match the A-Pillar
Last edited:
- :
- MP5T / 944
mp3josh said:
Thanks. I'm really quite excited. It's sunny and quite warm. It's onlt February, but it's starting to feel like spring. The motor goes to the shop next week!
- :
- MP5T / 944
TurfBurn said:Brian.. does that pillar hold 52mm gauges??? if so where'd you get it.. I need a 4 podder
Here is a picture of it as I was making it. They do not make a 4 Pod Pillar.
I took the stock pillar and attached two double pods to it with epoxy. Then with Bondo, removed all the harsh edges, sanded it down and now it's just primed. When I get my Hood, Front, Console painted, it's geting painted as well. Check out Page one for a shot of what it looked like before with the paint on it...
- :
- MP5T / 944
- :
- MP5T / 944
