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Old 12-14-2005, 12:18 AM   #16
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Re: Which engine is better, more powerful? The new GM 3.9 v6 or 3.6?

Originally Posted by rlchv70
Compare the torque curves:



The 3.6L torque is virtually flat across the rpm range. However, the 3.9L torque exceeds the 3.6 at almost all rpm points. Therefore, this is a strong argument that the 3.9L is faster than the 3.6.
That V6 3.6 from the Buick must be in some sort of grandpa tune. Isn't one of the hallmarks of a performance DOHC engine that they make power up high? That thing hits peak torque at 2000 rpm.

Here is the 3.6 in Caddy tune.

I'll take a wild guess that if they were to go for an SS or GTP application they might get more pep out of it than they do for Buick or Caddy.
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Old 12-14-2005, 12:59 AM   #17
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Re: Which engine is better, more powerful? The new GM 3.9 v6 or 3.6?

If we're all consistent, we'd opt for the 3.9L. But marketing forces being what they are... Japanese/Euro makers go the complex and expensive route with their engines mainly because fuel is waaay too expensive for their destination markets... be that as it may, their 4 and 6 cyl engines perform just fine with DOHC. V8s are a different ball game, though, I don't think I'd love the 3.6L engine if GM added two more cylinders to it... I'd still prefer my LS1 to a DOHC V8 anyday.
2003 Holden Monaro M6 - Stock as a rock.
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Old 12-14-2005, 01:04 AM   #18
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Re: Which engine is better, more powerful? The new GM 3.9 v6 or 3.6?

I was surprised at how smooth the 3.9 drives. It sure feels alot like an old 5.0L L-69.
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