50mm intake, was Re: ebay link

[jdbubb at verizon.net (Dan Bubb)]

I don't have any hard data either, but some peripheral data seems to indicate the 50mm ought to work well on a 2.0 or 2.2L.
Of course, the 50mm originally came on the European 1.8L. That, the addition of a cat and the Euro intake cam, which is still nothing to write home about, raised power from 123@5800 to 139@6100. The maximum torque speed went from 4250 to 4800 although the max torque value didn't change much (conflicting numbers from my research). And, of course, the breadth of the torque curve is probably very much in favor of the US engine.
Anyway, the bigger intake manifold seems to be integral to the higher power of the Euro 1.8L.
I'd can't think of any reason why that wouldn't translate to a bigger engine that will have an even higher airflow capability.

My experience with 16V engines isn't extensive, but I do know that the difference in midrange power going from a 1.8L to a 2.0L, with no other changes, is really dramatic. I'd expect the 2.2L would be another big step up. So, much in fact that I doubt you'd miss the comparative lack of midrange of the 50mm.
Typically, increasing an engine's displacement without other changes will increase torque and low end power, but will also reduce the peak power speed. So you end up with a comparative torque monster that needs to be shifted at a lower maximum RPM. Making changes to bolster the top end would seem appropriate to me.

Check out the pictures here:
http://www.scirocco16v.com/gallery/16v_abfengines_index1.htm
The 2.0L European ABF looks to have a hell of a big intake manifold.
Well, at least it looks that way to me!
Anyway, nothing definitive, just a bunch of sort of related facts and my opinion.
Dan
 
 ----- Original Message ----- 
 From: "Lance LaPrarie" <sciroccojunky@gmail.com>
To: "Dan Bubb" <dan.bubb@gmail.com>
Cc: "alex porter" <alexporter_14@hotmail.com>; <scirocco-l@scirocco.org>
Sent: Thursday, July 06, 2006 5:51 PM
Subject: Re: ebay link
 
 
> Hey Dan,
>
> I don't have any hard data to back that statement up. I did a bunch of
> research when deciding to get the best out of my buck on my current motor. 
> I
> was going to buy a 50mm intake and read somewhere that it really doesn't
> do anything for you on larger motors. I also asked the shop that built my
> motor and they said it wouldn't do anything benefitial for me and not to
> spend the money. From what I gathered it's like the 1.8ltr head on a
> 2.0ltrblock. It helps if you don't port it out. Once you port it out
> you lose the
> advantage over the 2ltr head ported. Porting a 1.8 and a 2.0 head there is
> really no difference between them. So if you know something that I don't, 
> I
> stand corrected. Also, top end power really doesn't matter to me since I'm
> not going to be racing my car. I'd rather have the power in a usable spot
> which is the midrange. My personal preference though.
>
>
> On 7/6/06, Dan Bubb <dan.bubb@gmail.com> wrote:
>>
>> Lance,
>>> Have any data to back up this statement?
>>> I think the common knowledge is that the 50mm intake boosts top end
>>> but hurts the midrange some, at least on the 1.8L.
>>> I'd think with the additional airflow of the 2.0 or 2.2L engines it'd
>>> be a benefit everywhere.
>>> Dan
>>>
>>> On 7/5/06, Lance LaPrarie <sciroccojunky@gmail.com> wrote:
>>>
>>> > I opted out on the
>>> > 50mm intake since it actually robs you of power on 2.0 16v's or larger.
>>> >
>>> >
>>> > Check it out.
>>> >
>>> >
>>>
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>> 
> 
> 
> 
>