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18 Sep 2005, 12:31 pm
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PLASTIC GT MANIFOLD PROBLEMS?
How many of you are happy with the new plastic intake manifolds that you have installed? I heard some are having trouble with air/fuel ratios, but no one stated how built the PT was. It would seem that resetting the PCM would correct the problems, but there may be more to it.Has anyone checked the conductivity of the manifold, or added a ground wire to the throttle body? I was considering purchasing the plastic manifold, but wanted to do my home work first. Also if you remove the aluminum manifold it would be an oportune time to upgrade to the 04 injectors (if you have an 03 GT). There are also upgraded intercoolers available, one of which requires no modifications and is bolt in, anyone try the combination?
    
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18 Sep 2005, 04:23 pm
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 '03 Inferno Red GT, 5 speed, STAGE 1, Mopar BOV, Plastic Intake, Modified Upper and Lower Airbox, Custom Airbox-to-turbo pipe, Borla dual exhaust, Maddog Short Shifter, Drilled/Slotter Rotors, Ceramic Pads, chrome wheels, chrome door spears, AMP chrome fuel door, PT Cruiser 3rd light diffuser, H&R Springs, Rear Sway Bar added, MGW chrome door lock pulls, Blane's hood struts, Custom license plate mount, some interior dress up stuff...more to come
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18 Sep 2005, 07:47 pm
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I think the plastic manifold people are quietly happy. I'm on the forum everyday, that has all the "gone plastic" people on it, and outside of an initial comment about A/F ratio, no one is complaining.
The manifold is on my list of things to do to my '04 GT.
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18 Sep 2005, 08:57 pm
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I was a little surprised not to hear more people commenting on the plastic intake manifold. I was looking at thermal wraps for the stock aluminum manifold to minimise heat soak. I did put an insulator around the stock IC hoses which seemed to help during the summer and stop and go driving conditions.I will evaluate the best bang for the buck, and so far the plastic manifold looks good (with out modesty cover).
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19 Sep 2005, 01:35 am
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Performance wise I haven't heard anybody say, "Oh Wow!". It's not something that you are going to feel performancewise. The ones who are really going to feel it are the '06 GT's. The software has been changed to go with the plastic intake manifold and that is why they are rated 10 hp higher.
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\'05 Stone White SRT4 \'04 Graphite PT Automatic
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19 Sep 2005, 01:47 am
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Well i definitely felt a difference in the top end, like the the car pulls harder. I have a slight miss around 2k rpms because of the increased airflow. Will be going to the track soon, see what kind of numbers i run.
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<div align=\"right\"><h2><b><i>Can we say Sleeper?</i></b></h2></div id=\"right\"><div align=\"right\">  </div id=\"right\">PrototypePower Performance UpCharge Pipe, Custom Cold Air Intake Mopar Blow Off Valve, Mopar Stage ? Mopar Stage 1 PCM, AGP WasteGate Actuator, TurboXS Dual Stage Boost Controller, TruBendz 3\" DownPipe with Custom 3\" Dual Exhaust, NGK V-Power Plugs and AGP Performance Wires, Autometer A-Pillar Pod with Boost/Trans Temp Guages
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19 Sep 2005, 03:19 am
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\'05 Stone White SRT4 \'04 Graphite PT Automatic
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19 Sep 2005, 09:25 am
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2005 Turbo Lite, Stage 1, Mopar/Borla cat-back exhaust, Eibach swaybars, Bilstein coilovers, 18/8 TSW Montage wheels with 225/40/18 Exclaim UHPs, LED taillights, K & N drop-in & a few other goodies...
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19 Sep 2005, 11:02 am
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It's because the plastic is a higher flowing manifold than the aluminum that some people are having issues. Try a lower gap on your plugs, or iridiums gapped at .028-.033, and it should get rid of the stumble.
On the 05's and 06's the new manifold and PCM programming gives an extar 10hp. If installed on previous year PT turbo's, it provides an extra about 8hp, less because of the PCM is not optimized for it.
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Black 2004 PT Cruiser GT with chrome accent package, chrome door spears, billet gauge eyebrows, chrome beltline, Autotechnica tail light covers painted body color, TYC by Elegente backup lights and GPS Navigation. Silver dragons on sides and hood. Stage 1! Spark plugs gapped to .040, and installed a set of Crane Firewires. BTG cold air intake, AMX1397\'s Turbo Up Charge Pipe, Boomba Racing BOV, Hallman Pro PX manual boost controller and Mean Green\'s Hyperground Solution. http://mysite.verizon.net/vze247vu http://www.ptcruiserworld.com/Junior 
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19 Sep 2005, 04:52 pm
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[^]I replaced the manifold with the plactic one & also installed a new set of NGK platiums and I can definely notice and increase in porformance,gaped the plugs at 32 and no miss. My wife who is no speed demon even noticed a diffrince. I can say WOW! what an improvement.[^]
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nudle
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