My All-Motar Build

Q&A: Performance Technical Support
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MikeSDA
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Joined: Sun Aug 26, 2007 6:05 pm
by MikeSDA » Sun Aug 26, 2007 6:11 pm
Hey guys, I cant belive I never registered on here! I could have sworn I did?? Oh well.

Figured I show you all what Ive been up to:

I sold my maxima and picked up a 94 SC2.
Were going to be doing another all motor build in
this one. Basically taking the same mods of the
old red sc2 and adding some new knowledge, more
planning, and a little more of a budget. The basics
of the lower end are somewhat of an experiment
but not completley.

Im using the 99-02 style cracked rods with shaved
95-98 DOHC Hyperutectic pistons. After doing all the
calculations to make up for the .151 difference in
length from the 91-98 rods and the 99-02 rods, I
found the correct ammount to shave the pistons.
I also kept in mind top ring landing size, piston to
head clearance, quench, and valve to piston clearance.
After all is said and done the combo (including a
.040 overbore and flatface valves) will give me 11.5
to 1 compression ratio AND the pistons have a little
larger of a top landing size than a 99-02 OEM piston.

The benefits to this are many for all motor instances.
A smaller top ring landing will have more complete and
efficent combustion due to less trapped gasses on the
sides of the landing....on a side note that equals less
emissions too. The piston ends up being completley
flat faced / flat top and will gain a tighter quench area.
Closer piston to head clearance which will also help
with quench. The piston ends up being lighter And we
all know the benefits of using a longer rod and shorter
piston. Plus this is more cost effictive than using forged
pistons for N/A and the hyper pistons allow tighter piston
to wall clearances than forged would.

I also got the crank lightened and the rotating assembly
balanced (pistons, rods, crank, flywheel).

Here are some pics of the block. Its been bored and honed
.040 over and then cleaned.


Image

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Heres some of the crank, luckily it only needed a polish
on the journals so I can still run std. bearings and it ends
up being cheaper.

Image

Image

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^ Heres the dots on the counter weight where the flywheel
and crank need to line up for the correct balance.

Just some pics of the flywheel...it weighs in at 7.5 Lbs. Also
on a plus note the balance on it was so good no material had
to be removed from it.

Image

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^you can see the marks on the top right corner to match
up with the marks on the counter weight on the crank.


Pics of the shaved pistons

Image
^here you can see how some material needed to be
removed from the bottoms to match the weights for the balance.

Image

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^ 0.083 top ring land, .003 more than a stock 99-02 piston


Image
I was also concerend with how much meat in the middle of
the piston would be left. I had 1 lone 95-98 hyper and a stock
99-02 piston so I cut them both in half to see after the shaving
how much material would be left. I was very happy to see
how much thicker the hypers are vs. the stockers. Theres
still going to be more material on the shaved hypers than
the 99-02's, so thats all good.



Pics of the rods

Image

Image
^ you can see the material removal on some of the rods needed for the balance


Image
Heres another little prototype part I made. Its a crank
scraper. Should help with the higher rpms by keeping oil
from slinging off and adhereing to the counter weights of
the crank and off the ends of the rods. It also should cut
down any kind of "windage cloud"

 

pn2r
6th Planet Addict
Posts: 293
Joined: Mon Oct 16, 2006 3:51 pm
Location: Mississauga / Toronto area
 
by pn2r » Sun Aug 26, 2007 6:29 pm
hey mike..welcome NOOB lol

can you look at my email for a qoute on a forged engine build

thanks

 

coppertop_01
Crazy Saturn Mofo
Posts: 1974
Joined: Sun Oct 15, 2006 12:10 am
Location: Brampton
 
by coppertop_01 » Sun Aug 26, 2007 8:11 pm
Welcome mike...........sounds like a sweet sweet build, should make lots of power, what are you doing for the top end? If you wanna go to building your own intake manifold, I got a TB for you..........from a Northstar V8.........probably too big, but would help your engine breathe

Also any fabricating you need that you can't find locally, ask me, I can laser up those windage scrapers.........

Jer

 

Viperoni
onenut
Posts: 1667
Joined: Sun Oct 15, 2006 10:44 am
Location: B-town, ON
 
by Viperoni » Sun Aug 26, 2007 8:58 pm
Awesome work Mike, I like those completely flat top pistons. I imagine it'll keep turbulence down inside the combustion chamber... perhaps that'll lead to quicker burn times?

Also it's a pity we don't have a taller deck so we could run long rods... $%(*#&@%(

 

STATIX
Registered User
Posts: 33
Joined: Thu Nov 27, 2008 3:46 pm
Location: Colorado
 
by STATIX » Wed Jan 14, 2009 3:57 pm
wow .40 over how is the internal temp lol i only went .20 over how much WHP did you make outta yours? But really GOOD build brother... :D

 

STATIX
Registered User
Posts: 33
Joined: Thu Nov 27, 2008 3:46 pm
Location: Colorado
 
by STATIX » Mon Jan 19, 2009 4:42 pm
Mike maybe you can post some specs or sell whichever you do about your "windiage scraper" im very intrested ive completly built the inside of my LLO just lookin :shock: for some more little tweeks to get that extra 2hp :lol:

 

viperssaturn
Moderator
Posts: 1653
Joined: Sun Oct 15, 2006 10:34 am
Location: Hamilton
 
by viperssaturn » Mon Jan 19, 2009 8:02 pm
Mike hasnt been around the board for quite some time. He is extremely busy at SDA! Give him a call if you have any questions regarding his products. He would be more than willing to share any info you need. Mike and Lisa are both a great help any time you need some.

 

STATIX
Registered User
Posts: 33
Joined: Thu Nov 27, 2008 3:46 pm
Location: Colorado
 
by STATIX » Tue Jan 20, 2009 4:38 am
cool cool thanks brother...

 

Viperoni
onenut
Posts: 1667
Joined: Sun Oct 15, 2006 10:44 am
Location: B-town, ON
 
by Viperoni » Tue Jan 20, 2009 8:32 am
I'm running 40 over and I have no problems at all, there's still plenty of thickness available. I would have gone with 60 over if I didn't have to get custom pistons.
I should have shaved the head a bit more too.

 

STATIX
Registered User
Posts: 33
Joined: Thu Nov 27, 2008 3:46 pm
Location: Colorado
 
by STATIX » Wed Jan 21, 2009 9:43 am
How much HP do you develop. I see there is plenty of thickness but my compression is 11.1:1 so yeah it would be bad to go any higher but also im not sure about the stengh or the LLO block...

 

Viperoni
onenut
Posts: 1667
Joined: Sun Oct 15, 2006 10:44 am
Location: B-town, ON
 
by Viperoni » Thu Jan 22, 2009 8:46 am
STATIX wrote:How much HP do you develop. I see there is plenty of thickness but my compression is 11.1:1 so yeah it would be bad to go any higher but also im not sure about the stengh or the LLO block...


Haven't got it dyno'd yet, but it is a pretty mild build. I'm only at ~10.0:1 with the stock height pistons and the head decked about 0.030".
The 91-94 OEM header isn't helping me much either, I need to mod my SPS header and get it on. I do expect something in the 130whp range though.

 

97SaturnSC2-Turbo
6th Planet Addict
Posts: 352
Joined: Sun Oct 15, 2006 9:32 pm
by 97SaturnSC2-Turbo » Thu Jan 22, 2009 10:44 am
I don't know Rudy, your one nut is probably holding you back....

Kevin

 

Viperoni
onenut
Posts: 1667
Joined: Sun Oct 15, 2006 10:44 am
Location: B-town, ON
 
by Viperoni » Thu Jan 22, 2009 8:27 pm
97SaturnSC2-Turbo wrote:I don't know Rudy, your one nut is probably holding you back....

Kevin


Not as much as your smoked clutch haha

 

97SaturnSC2-Turbo
6th Planet Addict
Posts: 352
Joined: Sun Oct 15, 2006 9:32 pm
by 97SaturnSC2-Turbo » Fri Jan 23, 2009 5:30 pm
lol, that should be attended to tomorrow.


Kevin
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kuchnie na wymiar radomsko

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