Re: 16v pistons on 8v

[Shawn C Meze <skerocdriver@juno.com>]

On Tue, 27 Mar 2001 18:52:31 -0400 "gabriel avila"
<rocco_16v@hotmail.com> writes:
>Has anyone ever installed 16v pistons on an 8v engine? Is the 
>increment in 
>power noticable? I saw this done on an 86 8v Scirocco and the guy 
>sweared it had about 150HP?


150hp isn't unobtainable in a 1.8L 8V. I don't know the entire recipe
this 86 had but at the very least, he would of needed race gas. 


> I saw the engine with the head removed and the pistons 
>were from a 16v. Is the increment in power that big? 


I recently bought a used 1.8L 16v short block (beat all to crap, sound
familiar Shannon?) from Potterman. The 16V has the vast majority of its
quench area in the head. Although the tops of the pistons are relatively
flat, there is a small amount of material removed so they're not
completely flat top pistons, damn close tho. Compression determines power
so its possible. 
 


>The mechanic who 
>dissasambled the engine told me the compression ratio was about 13:1. 
>Are this number realistic? 


Id guess more like 14:1. Probably high 13's to 1 CR is more realistic. Id
love to build up a motor for drag racing using these pistons. ALL factory
parts MOTOR! Sweet. 



>I don't know what code the engine block has nor 
>if it had other mods done to the engine. Any comments?


Im sure its got a few mods done to run the 16v pistons. Head work frees
up quite a lot of power gains. Cam, exhaust, ignition system (stock
wouldn't work with the motor you described.) fuel ect. These all play
into account as to what the final result in numbers will be. Anything is
possible. 


Shawn Méze
86' Jetta GLi 8V       84' Scirocco 8V           88' Corvette -SS 30-
82' Scirocco GTi -FSP 54-     79' "Project FSP Scirocco"
The Fastest, Quickest, Cleanest and best looking Scirocco in all of San
Diego!
http://www.Geocities.com/MotorCity/Speedway/1308/index.htm

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