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I can't wait to see dyno results from this swap. I was going to get a P&P 3400 upper & lower intake w/62mm TB but now I want to do a 3500 plenum swap. This fits under a stock 99+ Grand Am hood, right?
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"A spirit with a vision is a dream... with a mission"
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yeah it'll fitOriginally posted by SE'sarecool2sigpic
1993 Cavalier Z24, 3.1/3400 hybrid, crane 272 cam, LS6 springs,port and polish,2.5 exhaust to 80 series flowmaster,solid mountsComment
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I wouldnt be surprised if its our fault, for everyone of us posting about getting one of these theres prob another couple lurkers who have ordered too. I imgine GMPD was saying WTF!?Originally posted by tejohnson
1995 Monte Carlo LS
3400 SFI 60v6
FFP Underdrive Pulley, S&S Headers, LSD, ODBII Swap, DHPComment
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GMPD haves it now its just in a different part number here it is the new part number # 12604753Comment
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I'm interested in seeing dyno results from this too. Has anyone figured out what the actual advantage of this piece is, since I read the actual ports are smaller than the 3400 UIM unless you port them out properly? Is it increased air volume in the plenum?'97 Grand Prix GT 3800 (sold)
'00 Grand Am GT 3400 supercharged
13.788 @ 103.73 mph, 320whp 300 ft/lbs
Gotta love boost!Comment
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yes increased cfm but i forget how muchOriginally posted by AaronGTRsigpic
1993 Cavalier Z24, 3.1/3400 hybrid, crane 272 cam, LS6 springs,port and polish,2.5 exhaust to 80 series flowmaster,solid mountsComment
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Unfortunately the test car we were wanting to use for dyno comparisons had 10 degrees KR and a fueling issue that I wasn't able to get fixed in time. Hopefully I can do some testing on a fiero 3400 that is stock once I get it tuned (OBD1).
Shorter runner length (none in the plenum), larger plenum area though im not sure how much, TB extension to the center of the plenum for more even air distribution. Each flow across the ports, which is the same as the old small port 3100 and the 2000+ 3400 (older 3400s have uneven flow from the plenum design), larger throttlebody opening to accept a 65mm TB without work. Only negative is it needs to be ported first but thats not a difficult job. I charge 50 to do it, 15 to modify the TB neck to clear the fuel pressure regulator.Ben
60DegreeV6.com
WOT-Tech.comComment
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yeah, I was just reading about his tuning problems over on the DHP site.
I might decide to get one of these someday, but it will probably be much more difficult to install for me because of the SC setup. Might have to wait until I'm ready to get an intercooler, when I wouldn't need the intake manifold to line up perfectly with the SC outlet anymore.'97 Grand Prix GT 3800 (sold)
'00 Grand Am GT 3400 supercharged
13.788 @ 103.73 mph, 320whp 300 ft/lbs
Gotta love boost!Comment
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If you don't mind my asking why did you chop that part off?Originally posted by tejohnsonStarted hacking a bit on mine....
2000 Grand Am GT
2011 Chevy Impala
"The world's best cam combined with a poor set of heads will produce an engine that's a dog. But bolt on a set of great heads even with a poor cam, and that engine will still make great power." ~John LingenfelterComment
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That would be the EGR mount. No need for it since I don't have my EGR. More hacking to come
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How do you view the pic? (all I see is adress, no image)'97 Grand Prix GT 3800 (sold)
'00 Grand Am GT 3400 supercharged
13.788 @ 103.73 mph, 320whp 300 ft/lbs
Gotta love boost!Comment
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Has anyone done this swap using the stock 3400 TB and not porting the 3500 manifold along with retaining an EGR? If so can I have some details.Comment
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A few more pictures. All remaining EGR mounting removed, along with the duct work. Two holes to be welded, on the side and bottom:
A pic facing towards the TB opening. Showing when Ben was referring to earlier in this thread (or another), how the neck extends into the plenum, and opens up about half way:
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We dont use html, just bbcode. I changed yours to links since the img code wasn't bringing up a picture.Ben
60DegreeV6.com
WOT-Tech.comComment
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