well, for a 2003 model, with 2+" lift, 245/75-16 Cooper STTs, 6 speed manual, magnaflow exhaust + cat, iridium plugs, K&N replacement filter and snorkel,
this is the dyno results I got today .. not sure if its good or not,
but the car performs way better than when I first got it.
that is 135,6 Cv @4.900rpm speed 172,4 Km/h torgue 205Nm(151.068lbf-ft) @4.500rpm(at the wheels ?)
Btw, if you really want to improve the engine's performance, you can swap most of the internal parts and gaskets, head etc with high performance parts for the SRT-4, and if you manage to fabricate new manifolds, install a 60mm throttle body and a turbo (size depends on how fast you want it ... up to 500whp easy!!) - oh you need major reprogramming also if you go that big
Anyone interested in a custom intake that fits a larger TB?
Can we have someone make one for us without spending a fortune?
The TB on my Jeep is a 42mm one and the intake port is something like this:
which accepts up to 46mm diameter TB.
However, the stock Dodge Neon with the same engine has a 49mm TB ((flows 252 cfm and doesn't fit), and can go up to:
52mm TB flows 283 cfm
55mm TB flows 317 cfm
60mm TB flows 377 cfm
"At 8200 RPM a 122 cubic inch engine will need 290 cfm at 100% volumetric effiency, using the formula ((Max RPM/2)*Displacement)/1728. Rule of thumb is to go 10% over because a naturally aspirated engine can go above 100% volumetric efficiency because of cam overlap, header design, etc. Go above that and you kill low end because of reduced velocity, go below that you starve the engine for air at top end. 110% is volumetric efficiency is 319 cfm." (more here:
http://www.dodgetalk.com/forums/showthread.php?t=81875)
Based on this, 55 mm does seem to be the option for naturally aspirated (non-turbo) engines.
with a performance intake ...
Some teaser performance parts for the dodge srt-4
which has the 2.4L turbo version. Manifolds & TBs don't fit because the engine sits parallel to the front bumper in these models
http://www.jscspeed.com/srt4/intake/agp_manifold.htm
http://www.boombaracing.com/dodge.html
http://www.turboneonstore.com/customer/home.php?cat=8
http://www.bpemopar.com/PT_CRUISER.htm
