Re: (tech)2.0 L 16V Build.

[mike <rept@qwest.net>]

That was EXCELLENT.  thank you.   I could actually
follow that and not get lost within all the new
info. 

Brett Van Sprewenburg wrote:
> 
> I'll take a stab at this, as many years ago, I was in your shoes.  Took
> me years to get the right info to make those decisions...anyway...
> 
> >I need to acquire the a list of pieces to build my new tuned engine.
> >But I also need the advise of the more knowledgeable list members on the
> >topic.   (thanks all)
> >
> > Here is the goal-    2.0L 16 V - with 1.8L head, Scirocco 16V Exhaust
> >Manifold, Polished Intake Manifold.    I want 180 hp (total) I want more
> >bottom end then top speed.  The car will be a daily driver for the most
> >part so I need a degree of drivability. I love torque.     My towns a
> >college town Lots of hondas-  I drive a BRIGHT yellow scirroco-  I hate
> >to lose.      the parts listed in this paragraph are all that I have
> >(block, stock crank, pistons, rods, 1.8l head (with burnt valves),
> >intake, and exhaust Manifold).
> 
> I believe you can hit 180hp depending on your cams...i sound like
> a broken record, but peak hp is for bragging, you drive torque.
> 
> >
> >I NEED
> >1)Valves-   high performance?  what brands?  will the lengths change or
> >stem thicknesses?
> 
> Stock, nothing changes.  don't bother oversizing due to what's called
> shrouding...it's where the valve starts to get too close to the chamber
> wall and flow is reduced.  Others will naturally disagree.  You should
> have the head ported however...several venders off the scirocco.org
> links page will do this for you.  from $300-$1200...quite a range.
> 
> >
> >2) springs-
> 
> Depends on cams...268's are at the edge between stock and higher
> perf.  I've gotten valve float at sustained high rpm running...I'm
> talking 130ish mph at 6500+ rpms for what seemed like minutes, and
> my cams are 260's.
> 
> >
> >3) cams. I want schricks-  should I run 276 or 286 or?   remember this
> >is a daily driver.
> 
> It's a hard lesson to learn, but do not over cam your motor if what
> you want is a torquey daily driver.  Based on everything I've learned
> over the years, keep with a 268 or lower.  In fact, you might want
> to try an asymetric 260 intake / 268 combo.  Seems the 16v's like
> that difference.  Oh, if you insist and that radical a cam profile,
> you're out of the range of hydraulic lifters and have to convert
> the head to solid lifter.  Do have the head decked to minimum, but
> .020-.030 more though to get yourself in the 11:1 CR range.
> 
> >
> >4) crankshaft-  I heard something about getting the "diesel" crank.  and
> >then something about a TDI? should I just maintain with the stock crank?
> 
> stock crank is 92.8 in the 2L block.  Some tdi's have a 95.5mm crank,
> this would increase your stroke...but physics says that you'll need
> newer pistons with a higher rod connection, or shorter rods (not
> recommended due to torque angles  but that's out of scope here...)
> 
> >
> >5)Lifters
> 
> have  your head rebuilder replace if necessary
> 
> >
> >6) pushrods
> 
> your engine is not so equipped. connecting rods maybe?  You might
> consider having the full rotating mass of the block balanced.
> Otherwise, stock rods will work fine.  Skip the arp fasteners unless
> you're into forced induction.
> 
> >
> >7) oil pump (high pro?)
> 
> bilstein stock replacement.  get the good one from mike potter.
> 
> >
> >8) water pump- thermostat?  what temp for my area- WA state (brrrr).
> >should I keep my stock fan? (81 storm w/ ac)
> 
> replace them, if you run the car in the winter, I'd get stock.
> Switch to the 16v rad and dual speed 16v fan is my advice.
> 
> >
> >9) brass freeze plugs?   what the hell?
> 
> Dunno much about the....all I can tell you is that when I had
> my engine rebuilt (the bottom end) by professionals, they
> replaced them.  No concerns there.
> 
> >
> >10) Pistons-  cast, forged, aluminum?   what is second size over?
> 
> Cast is stock, 83mm is biggest cast you'll find.  Made by Mahle in
> general.  You'll pay $350-$500.  Every oversize is .25mm, since
> 83mm is .5mm over the stock 82.5mm, 83mm pistons are the second
> oversize for that motor.  Most forged pistons run looser
> tolerances in the bores, and rattle on start up...burns more
> oil etc...only way to go for a really big motor though.
> 
> >
> >Thanks in advance.
> >
> >Mike Blain
> 
> My engine makes a dyno confirmed 170hp +/- some error with many
> of these same mods plus several more actually.  I'm changing my
> cam timing this year (less advance), and adding a supersprint header...
> I think I'll be really close to the 180hp mark.  I think I'd like to get
> a set of the internal 16v adjustable cam gears at some point too...
> 
> good luck.
> 
> ==Brett
> 
>  \/  '84 Scirocco (ITB racer 2B) | "Hot VW's, take two home. They're small"
> \/\/ '88 Scirocco 16v (Show), '92 Passat 16v (Winter+) | - brett@netacc.net
> 
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