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Old 05-08-2010, 10:42 AM   #1
TurboQueef
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Join Date: May 2005
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Silver/Black,11.44@123.60

Default 21500 miles on an Axis / RAW Performance motor

Did you ever wonder what the inside of a Axis / RAW Performance built motor looks like after 21500 miles?

At 21500 miles the motor was still running strong.. making same power as it did at 5K miles when I started to add BOOST to it.

The only issue I had with this motor was piston slap from the drivers side. It became noticeable at 5K miles.

I continued to drive the car with the piston slap and put 16500 additional miles on it.

I decided to pull the motor and drive it down to Ron's shop in Columbia IL for a refresh. The car is for sale... for the right price (see my classified add if interested). My plan was to evaluate the motor condition after 21500 miles and if everything looked good... upgrade the performance a bit more with ported heads and aftermarket rods.

Ron, Shawn (Ron's assistant) and I were very happy with what we found inside the motor... very minimal wear and no surprises.

The video below captures the key points of our evaluation.



About my project:

2005 STi, AXIS / RAW Performance motor (see spec below), FP Red, KS Tech 83mm CAI, DW 850 injectors, Tuned with ROMRaider & StreetTUNER by myself (with help from a few very good friends).

The car was achieving 29.72 miles per gallon highway driving.

I ran a best of 11.44 @ 123.60 in the 1/4 mile

My build specs:



About Axis / RAW Performance:

The video probably speaks for itself... but I will add that I am very impressed with the quality of work Ron produces. In addition to top quality the customer service is unbelievable. I really appreciate Ron and Shawn's willingness to allow my son and I to capture the experience on film.

If you are looking for a solid build, I recommend Ron and his team. If you are interested, visit his webpage: http://raw1performance.com/
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Old 05-08-2010, 10:56 PM   #2
cha86
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ok..im not one to question rons ability to build engines, but keeping those cam caps in order is pretty important, not one minute into the video they just discard them into a box.

i dunno about all that.
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Old 05-08-2010, 11:02 PM   #3
wrxwhat
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21,500 miles isnt exactly a lot
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Old 05-08-2010, 11:07 PM   #4
MartinSTi05
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Quote:
Originally Posted by cha86 View Post
ok..im not one to question rons ability to build engines, but keeping those cam caps in order is pretty important, not one minute into the video they just discard them into a box.

i dunno about all that.
All the caps are numbered from the factory.
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Old 05-09-2010, 12:07 AM   #5
john 1badSTI
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they are not only numbered position wise but also with the matching 3 digit # on the back of the head so they are matched to the appropriate head.
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Old 05-09-2010, 12:33 AM   #6
jigga
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The deposits on the valves..... was that from running c16 race fuel?
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Old 05-09-2010, 12:56 AM   #7
TurboQueef
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Quote:
Originally Posted by jigga View Post
The deposits on the valves..... was that from running c16 race fuel?
Nope... it was from Citgo 110 leaded
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Old 05-09-2010, 09:04 AM   #8
2milehi
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How much clearance was there between cylinder #4 and the associated piston?
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Old 05-09-2010, 09:23 AM   #9
TurboQueef
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Quote:
Originally Posted by 2milehi View Post
How much clearance was there between cylinder #4 and the associated piston?
Let me confirm with Ron, I believe: Passengers side (no noise) were around 0.003, noise maker was 0.0035
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Old 05-09-2010, 06:23 PM   #10
cha86
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Quote:
Originally Posted by MartinSTi05 View Post
All the caps are numbered from the factory.
are you sure? i never saw any numbers on mine. just a small arrow indicating direction..i guess i was just over cautious on my build then i suppose
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Old 05-09-2010, 06:56 PM   #11
MartinSTi05
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Every Subie ive ever torn apart the caps are serialized and have int and or ex somewhere on them.
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Old 05-09-2010, 07:02 PM   #12
sense of nature
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Quote:
Originally Posted by TurboQueef View Post
Let me confirm with Ron, I believe: Passengers side (no noise) were around 0.003, noise maker was 0.0035
The way that piston moved in the video it looked alot more than .0035
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Old 05-09-2010, 09:54 PM   #13
subSTIaru
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i believe that they use CP pistons they ask for a lot of clearance and they always slap i had a car in that sounds just like that with CP pistons it souned like it had a rod knock it is normal for cp's

Last edited by subSTIaru; 05-09-2010 at 10:44 PM.
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Old 05-09-2010, 10:14 PM   #14
woodys77
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Quote:
Originally Posted by sense of nature View Post
The way that piston moved in the video it looked alot more than .0035
^^^^ This

that looked real sloppy.
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Old 05-10-2010, 04:22 AM   #15
TurboQueef
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Just checked with Ron, the noisy on was .0037 all rest were .0032~.0034.

He is going to set the refresh a little tighter, .0027~.0028
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Old 05-10-2010, 05:50 AM   #16
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Of course it is, the bore clearance is measured at the largest point on the piston, which is near the base of the skirt. The crown is much smaller as it expands more due to being much hotter.

A 99.5mm piston crown will expance to 99.86mm when going from 20degC to 180degC, so obviously it needs to be MUCH smaller than the base of the piston.



Quote:
Originally Posted by woodys77 View Post
^^^^ This

that looked real sloppy.
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Old 05-10-2010, 09:10 AM   #17
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Quote:
Originally Posted by Pavlo View Post
Of course it is, the bore clearance is measured at the largest point on the piston, which is near the base of the skirt. The crown is much smaller as it expands more due to being much hotter.

A 99.5mm piston crown will expance to 99.86mm when going from 20degC to 180degC, so obviously it needs to be MUCH smaller than the base of the piston.
Interesting insight....
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Old 05-10-2010, 12:59 PM   #18
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The top ring land will also be oval too, and some piston companies use grooves to allow a tighter clearance, if the pistons scuff the grooves allow the high spots to deform or wear without seizing in the bore.
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Old 05-10-2010, 02:38 PM   #19
kellygnsd
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Quote:
Originally Posted by cha86 View Post
ok..im not one to question rons ability to build engines, but keeping those cam caps in order is pretty important, not one minute into the video they just discard them into a box.

i dunno about all that.
They're marked as to what positionand direction they go on the head so putting them backin the right spot is all about knowing what direction is fron and what cylinder is what.
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Old 05-10-2010, 03:08 PM   #20
03silverscoob
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I have a motor from them also, but mine actually has like 30k miles almost. it has the cp pistons and mine are noisy as hell! theyve gotten a lil louder, but theyve really stayed about the same for awhile. they do sound like a rod knock, alotta people have asked me about it.
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Old 05-10-2010, 07:50 PM   #21
TurboQueef
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Quote:
Originally Posted by 03silverscoob View Post
I have a motor from them also, but mine actually has like 30k miles almost. it has the cp pistons and mine are noisy as hell! theyve gotten a lil louder, but theyve really stayed about the same for awhile. they do sound like a rod knock, alotta people have asked me about it.
Yea... the sound is horrible.. and embarrassing .... till you get into the throttle and all worries go away.

I carpool with a guy to and from work... he is a performance nut ... but... the first time he heard the piston slap, he asked that I give him warning before mashing it ... so he could put his safety glasses on
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Old 05-10-2010, 07:56 PM   #22
AWDWRXLOVER
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do you have a clip of the motor running?
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Old 05-10-2010, 08:06 PM   #23
TurboQueef
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Quote:
Originally Posted by AWDWRXLOVER View Post
do you have a clip of the motor running?
Sure.. here is a clip from last Friday as I was positioning it for the extraction!

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Old 05-10-2010, 08:15 PM   #24
TurboQueef
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Old 05-10-2010, 08:19 PM   #25
TurboQueef
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And.. finally, here is what it sounded like running the 11.44 pass (the slap started to happen well before this pass was made)

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