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Subscribe to this threadGM cancels new DOHC V8 engine program
(Page 1 of 1)
Dan @ Jan 3rd 2008 2:43PM
Yes, that Cadillac V8 0.4% of the US car market is clearly the tipping point for what the earth can stand.
Sad day for enthusiasts. Good day for smelly hippies.
Andrew @ Jan 3rd 2008 2:46PM
Yeah, because enthusiasts need a V8 DOHC gas powered engine, and everyone else is a hippie. What an idiot.
naggs @ Jan 3rd 2008 5:25PM
this is great news
GM will continue to refine the inherently superior push rod v8 for years to come
Dave @ Jan 3rd 2008 8:30PM
GM can build their small block chevy (SBC) pushrod engines much cheaper than a DOHC engine. And with Toyota breathing down their necks, they need every financial advantage they can get in the pickup truck wars. So they won't be discontinuing that line any time soon.
Between the SBC, 3.6, GM's upcoming diesels, and dual mode hybrids, there isn't really a huge need for this new engine. (A dual mode DI 3.6 would provide impressive economy and performance in a large Caddy while also providing the DOHC valvetrain required by the marketing dept)
Its an understandable business decision.
In addition, GM just introduced the new ZR1 with a pushrod engine. The original ZR1 was the 80s poster child for DOHC.
Owain Ozymandias Buck @ Jan 3rd 2008 10:49PM
That's a good point about refining the OHV pushrod engine. It still has advantages over an OHC configuration, compactness being one of the most important.
It's a different evolutionary path, not a throwback. Roaches are crude, but they've kept up and are doing pretty well in many ecosystems.
About Toyota: maybe they should've borrowed from their NASCAR V8 for the new Tundra. Might have saved them some money. Might have fixed those camshafts too! I bet they could do a good OHV V8 if they tried.
J.Crew @ Jan 5th 2008 2:31PM
All they are doing is dropping the developement of a low volume engine with limited production use. I have no worries about Cadillac and its use of 8 cylinders. GM is looking at profitable growth with an eye on what needs to be developed to meet the new fuel economy standards in the future. They are being smart by not wasting money and talent on a project with a limited future. This engine would have been completed just in time to be hit by the new fuel economy standards to kill it off and people would have been slamming GM for not thinking ahead and knowing that this engine does not fit the times. Seems to me that GM is being smart and most likely looking at other options like using this new diesel:
http://www.gm.com/explore/fuel_economy/news/2007/adv_engines/diesel_061807.jsp
Notice the size and power estimates. It fits in the same space as GM's current small blocks. The N* was larger than the small blocks. Also the torque rating on this new engine would make one hell of a great premium feel in a large Cadillac while making excellent fuel economy...
I am sure you will be hearing announcements from other manufacturers regarding their engine programs due to the new 35mpg standard. GM is the first to step up.