[DeTomaso] NPC Anyone know much about the GM direct injection300 HP V6

[Paul Timko]

It still has to reject the combustion cycle right?  So I don't think it 
is the pump so much as the valve.

Paul
#9270

Larry - Ohio Time Corp wrote:
> Ken,
> 
> After reading the wiki it is saying that the injector shot is going in
> during the intake stroke, unlike a diesel that happens on the compression
> stroke, so why do you need a fancy high pressure pump?
> 
> Larry - Cleveland
> 
> -----Original Message-----
> From: detomaso-bounces at realbig.com [mailto:detomaso-bounces at realbig.com] On
> Behalf Of Ken Green
> Sent: Wednesday, December 17, 2008 1:23 PM
> To: detomaso at realbig.com; JDeRyke at aol.com
> Subject: Re: [DeTomaso] NPC Anyone know much about the GM direct
> injection300 HP V6
> 
> Here is some more on direct injection, it sounds pretty interesting:
>  
> http://en.wikipedia.org/wiki/Gasoline_direct_injection
>  
> With all the companies casting after market heads, and making after marker
> ECUs, this could be an option in the future.  
>  
> Ken
> 
> 
> --- On Tue, 12/16/08, JDeRyke at aol.com <JDeRyke at aol.com> wrote:
> 
> From: JDeRyke at aol.com <JDeRyke at aol.com>
> Subject: Re: [DeTomaso] NPC Anyone know much about the GM direct injection
> 300 HP V6
> To: kenn_green at yahoo.com, detomaso at realbig.com
> Date: Tuesday, December 16, 2008, 9:42 PM
> 
> In a message dated 12/16/08 3:11:40 PM, kenn_green at yahoo.com writes:
> 
>> I was told that this engine is cleaner and makes more HP than non-direct 
>> injection motors.  So is this another major step in engine evolution, big
> or 
>> small?
>>
> Maybe. It works like a diesel in that fuel is sprayed directly into the 
> chamber at around 1200-1600 psi and only air goes thru the intake & past
> the 
> valves. The only real 'breakthru' is sealing a high pressure gasoline
> pump that can 
> be mass-produced. This was the stumbling block for decades- the mid-'50s 
> Mercedes gullwings had direct injection fuel pumps with internal clearances 
> measured in angstroms.... In any case, D.I. engines are un-modifiable by you
> & I, so 
> personally, I'm not interested in yet another hands-off black-box.
> Expecting 
> the Gov't to seal all street engines any day now. Sigh- J Deryke 
> 
> 
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