1.8 Vs. 2.0 Revisited AKA why 1.8 instead of a 2.0 head

[haygood@aemail4u.com (Haygood)]

keep in mind that the article was from '93.  TT could prolly get the 1.8heads more cheaply since the 2.0l heads hadn't been around as long and weren't in as many cars (I'm guessing) at that time.  Also, 2.0l needs more material removed before benefits are seen in flow bench.  2.0l head is not simply worse flow in stock form.  Flow benches only measure constant peak flow.  Real engine operation involves pulsed flow and factors like low rpm performance.  The 2.0l head was built for low end torque.  I'm just saying that's what it was for, not that that is what we want.

BH

--- JoshuaA.Conner@VerizonWireless.com wrote:
>Taken from E/C Jan 1993 article written with Techtonics.  All numbers were
>derived from testing on a Superflow SF-300 flow bench. 
>
>
>			Intake port flow testing on Superflow Flow Flow
>bench at 28-inches
>
>Valve lift		.100-in		.150-in		.200-in
>.250-in		.300-in		.350-in		.400-in
>
> 1.8 16V Head 		75.7		107.8		138.2
>161.2		175.3		181.0		183.4
> 2.0 16V Head		67.7		101.4		130.7
>143.3		163.2		197.9		171.1		
>		
>TT Streetport 16V	75.8		110.9		146.5
>175.0		190.6		199.1		209.4
>
>
>
>			Exhaust port flow testing on Superflow Flow Flow
>bench at 28-inches
>
>Valve lift		.100-in		.150-in		.200-in
>.250-in		.300-in		.350-in		.400-in 	
>
>1.8 16V Head		67.4		96.1		114.9
>121.1		124.2		125.2		126.3	
>2.0 16V Head		60.9		91.1		115.9
>129.3		136.5		138.3		140.8	
>
>TT Streetport 16V	66.8		99.2		125.4
>138.7		152.3		160.2		165.6	
>
>
>It is interesting to note that TT at the time of this article was using 1.8
>16V cores for there Streetport 16V($1000).  Thus it seems there is quite a
>valid argument for using the 1.8 stock head versus 2.0 stock head.  That
>being "out of the box" performance is greater with the 1.8.  Porting is very
>much a craft "BEST" done by those very experienced and with a flow bench.
>However if you got a spare head give it a shot, you never know until you
>try.   Summary:  if you got serious porting skills or serious cash for a
>already ported head prolly get a 2.0.  Cheapasses on a budget get the 1.8
>and go fast( not as ultimately fast, but remember the budget?)
>
>Joshua C.
>'88 Red 16V 2.0block 1.8 head
> 
>  	
>
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