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balancing. / Shot peening my rods?
Grinding (to remove stress risers) is different from shot peening (done to introduce a compressed surface, thereby reducing chance of crack initiation), done for these different reasons.
With low hp engines (such as the VW 8v), it's hardly necessary, but it won't hurt!
Larry
sandiego16v
----- Original Message -----
From: shawn f
To: Joe Doty
Cc: scirocco list
Sent: Tuesday, October 28, 2003 3:12 PM
Subject: Re: balancing. / Shot peening my rods?
Ok so if a grind them smooth (the sides of my rods) i dont really need to
shot peen? Hmmm maybe a wont bother anyway then. Just figured lighter rods
are easier on everything as well.
----- Original Message -----
From: "Joe Doty" <Joe.Doty@lcnetwork.com>
To: "shawn f" <falzsf@mts.net>
Cc: "scirocco list" <scirocco-l@scirocco.org>
Sent: Tuesday, October 28, 2003 4:59 PM
Subject: RE: balancing. / Shot peening my rods?
I wouldn't bother with shot peening unless you plan on making more than
300hp.
Joe
-----Original Message-----
From: shawn f [mailto:falzsf@mts.net]
Sent: Tuesday, October 28, 2003 2:59 PM
To: Adrian
Cc: scirocco list
Subject: Re: balancing. / Shot peening my rods?
Yeah i just have stock pistion (1mm overbore though), ARP head studes,
ARP
conrod bolts. Crank, is shaved done .25MM. I was thinking of grinding
the
rods a little bit like they show in the performance VW book. Then you
need
to shot peen it. I was just wondering if i can shot peen with me
sandblaster
cabinet. Do i need too just buy shot peen pellets? If so where can i
find
them. I tried princess auto but they didnt carry anything like that. Any
ideas anyone?
----- Original Message -----
From: "Adrian" <adrian.culda@sympatico.ca>
To: "'Adrian'" <adrian.culda@sympatico.ca>; "'Mark'" <mardak@cogeco.ca>;
"'shawn f'" <falzsf@mts.net>; "'scirocco list'"
<scirocco-l@scirocco.org>
Sent: Tuesday, October 28, 2003 3:25 AM
Subject: RE: balancing.
> BTW
> Depeneding on what parts are used engine balancing will add anywhere
> from 500 - 2000 extra RPM up top!!!
>
> Adrian C.
> Project Scirocco R2.oT - "The Turbocharged 16Valves of Fire Breathing
> Fury"
> ( 2.0L 16V T66 )
>
>
> -----Original Message-----
> From: scirocco-l-bounces@scirocco.org
> [mailto:scirocco-l-bounces@scirocco.org] On Behalf Of Adrian
> Sent: October 28, 2003 1:24 AM
> To: 'Mark'; 'shawn f'; 'scirocco list'
> Subject: RE: balancing.
>
> The reason why they need the pulleys is that need to retune the
> harmonics of the crank shaft once its been balanced.
> My machinist after he knifeedged my crank he took a look at my pulley
> and looked at me and said:
> This is garbage... if I put this back up we didn't really accomplish
> anyhting cuz were just putting back some more weight.
> So I guess he got me aluminum one. From where he got it, I have no
clue.
>
> The engine is almost complete.
> Rods and pistons are still back ordered (dammit why do they have to
> always give you a hasle with custom stuff!
>
> Head will be done soon and will post pictures of it :)
> - Ported and Polished ( 2.0L 16v )
> - Head Converted to Solid Lifters
> - Black Nitrided SS intake Valves and Inconel Exhaust Valves
> - Valves are .5mm oversized and 1mm back cut for better flow.
>
> Now I'm a bit confused on whatever I should wait for UMS or get the
DTA
> unit.
> Either way I will have to look at fitting the Gm sensorsso it's a toss
> up between the $2500 CAN ECU or the $250 Can ECU ;)
>
> Adrian C.
> Project Scirocco R2.oT - "The Turbocharged 16Valves of Fire Breathing
> Fury"
> ( 2.0L 16V T66 )
>
>
> -----Original Message-----
> From: scirocco-l-bounces@scirocco.org
> [mailto:scirocco-l-bounces@scirocco.org] On Behalf Of Mark
> Sent: October 27, 2003 9:25 PM
> To: 'shawn f'; 'scirocco list'
> Subject: RE: balancing.
>
> I don't think they'll be grinding any metal off of the pulleys... My
> guess is that they bolt it together with the crank and material gets
> taken off of the crank if it's out...
>
> Mark.
> 80 S
> 81 S ABA/JH/4K
>
> > -----Original Message-----
> > From: scirocco-l-bounces@scirocco.org [mailto:scirocco-l-
> > bounces@scirocco.org] On Behalf Of shawn f
> > Sent: October 28, 2003 12:09 AM
> > To: scirocco list
> > Subject: balancing.
> >
> > Well since my engine build got delayed i decided i should get it
> balanced.
> > They (the machinist) want my Rod, one set of con rod bearings, one
set
> of
> > rings, The crank, flywheel and bolts, cluch, pressure plate, front
> srocket,
> > with bolt and pulley. I was wondering i sanblasted (another get air
> tool i
> > got recently, sand blasting cabinet) the parts pulley and sprocket
> that is
> > and was wondering if it would be ok to paint these parts. Just
> wondering
> > if they mind i guess it doesnt matter. Problem i was thinking is if
> they
> > have to grind some of the parts there goes the paint. I guess i can
> touch
> > any areas ground down. But then that may throw it out of balance
> again.
> > Anyone know how much redline i can expect. I relize that i still
need
> a
> > better cam and stronger springs in the future, but when i get some
> good
> > springs what redline can i expect. Any things i should stress with
the
> > machine shop? Any advice would be great...
> >
> > Shawn F
> > _______________________________________________
> > Scirocco-l mailing list
> > Scirocco-l@scirocco.org
> > http://neubayern.net/mailman/listinfo/scirocco-l
>
>
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