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Old 07-04-2005, 02:45 PM   #11
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Quote:
Originally Posted by Custom88
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Originally Posted by jr's3800

And from what I see in your video, it looks like they set the 4T65-E up for everything it could handle.... Was that a 6300-6500 shift? I will give you this tho... That thing was hella happy to wind out...
at WOT it only shifts at 6,200 RPM even though the engine itself redlines at 6,600. :( THat'* really unfortunate seeing as it makes it'* max power even above the 6,2000 RPM shift point. If you look at the chart, the HP doesn't start going down even at redline. that engine is capable of power much higher than what it'* allowed to rev. also, the way I see it, the low end torque of the 3800 is nice around town, but, what do you use more? Low end grunt for dead stops, or the high end power which you would use during passing maneuvers? I'd honestly rather have the extra horsepower while passing, then a little extra torque from a dead stop.
well its a matter of preference... Thats not to say I wouldn't buy a 3.5 Shortstar powered car... I would have loved to see that engine in a Grand Am... That would have been fun... Too bad GM didn't use the engine in more models...

I thought for sure quite a while back that the 3.5 was being developed as a replacement for the 3800 line... Guess I was wrong, and yes its very possible that cost plays a large factor...

I just love pushrod engines, always have and still do....

But on the same note DOHC can be very fun....lol

One day I may have one

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Old 07-04-2005, 02:47 PM   #12
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Quote:
Originally Posted by repinS
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Originally Posted by jr's3800
There is a 3.6 vvt like jason stated... But I have heard a bit about a 3.9.... Is this 3.9 a DOHC 3.9 or is this a punched out 3400/3500 set up to make 260 hp?
Still pushrod and 3100/3400/3.5 based, as far as I know



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It'* a DOHC motor so it'll be much bigger up top.
Valvetrain layout isn't the only factor. You've still got cam profiles, number of valves, blah blah. DOHC 2-valve motors have existed, *looks at avatar*
Hmm may be interesting to see a 3900 chevy V6...

and yes, isn't the cam on a 3800 pretty flat ?

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Old 07-04-2005, 05:15 PM   #13
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Haven't heard much about the 3900 V6. Is it just a stroked 3800 w/ 240hp?
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Old 07-04-2005, 05:18 PM   #14
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Still pushrod and 3100/3400/3.5 based, as far as I know



therefore not 3800 based :P
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Old 07-05-2005, 02:32 AM   #15
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it would be pretty hard to beat the 3800 in terms of cost.

The 3.5 is still used in the CTS I think...
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Old 07-05-2005, 03:05 AM   #16
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I think some are thinking of the 3.6L that Cadillac uses. The 3.5L was only used in the Intrigue and Aurora. It was only used from 99 until 2002. It only had a three year run and it was designed by Oldsmobile. :( When the Intrigue was discontinued in 2002, the Aurora also dropped the 3.5L as an optional engine. all 2003 Auroras were the 4.0.
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Old 07-05-2005, 10:30 AM   #17
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Interesting that they would drop it after the three years. Usually the costs for them to do that would be more expensive than to adapt it into another body.
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Old 07-05-2005, 11:34 PM   #18
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Quote:
Originally Posted by Custom88
I think some are thinking of the 3.6L that Cadillac uses. The 3.5L was only used in the Intrigue and Aurora. It was only used from 99 until 2002. It only had a three year run and it was designed by Oldsmobile. :( When the Intrigue was discontinued in 2002, the Aurora also dropped the 3.5L as an optional engine. all 2003 Auroras were the 4.0.
I stand corrected, the CTS uses a 3.6 VVT with 255HP. Starts at 30k, sounds better than a GXP!
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Old 07-07-2005, 01:40 AM   #19
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i got bored and did the power curves on top of eachother.

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Old 07-07-2005, 03:03 AM   #20
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i got bored and did the power curves on top of eachother.

awesome work Rjolly! I'm not good with stuff like that, so I'm glad you took it upon yourself to do it. WIth that graph it makes me wonder even more why pontiac/buick didn't use the 3.5. It'* just a lot more powerful in the higher RPM'*. It doesn't have the lower end torque at very low RPM'* as the 3800, but it does have the higher gear ratio to make up for it, and it'* rated at the same fuel economy as the NA 3800. If only I could ask GM myself. lol. THat gear ratio must really make a difference though because the acceleration from a dead stop is very similar between my Aurora and my brother'* 00 SLE. Once you get above 3,500 RPM the 3.5 starts pulling away hard from the Bonneville though.
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