View Full Version : 2003 magna
langen
06-03-2010, 05:35 PM
i have an 03 awd magna but im unhappy with the down low performance of the vehicle any advice?
cberry30
06-03-2010, 05:46 PM
umm, ok, how do you mean down low performance
compare it with another to see if you've got a problem or it's just less than you were hoping.
Mine's kind of sluggish to 10kph thanks to the auto, but then it travels very nicely.
lowrider
06-03-2010, 06:37 PM
being a AWD, its running the same engine but with a lot of extra weight. perhaps some performance mods?
i dont think there is a lot to help low down power without cracking open the engine.
usally exhaust mods help mid-top end power
langen
06-03-2010, 07:11 PM
just after more acceleration with out forced induction. its tip-tronic and once i hit 3rd gear it goes great just want some more power off the line. there is no problems with the car!
cberry30
06-03-2010, 07:21 PM
Exsaust, K and N Panal filter, good leads, plughs dizzy cap
I'm dubious about a K&N filter providing any performance benefit, but exhaust will definitely give you an improvement.
The exhaust has 2 main points that can be improved.
1) is the actual muffler. My Magna Sports AWD model has a nice free flowing rear muffler that gives about 6kW over the Magna AWD and Verada AWD. I'm sure an aftermarket one will free up that restriction and return at least 6kW and can be done very cheaply.
2) where the exhaust merges from 2 pipes into 1 is a very strange design on the AWD, it's more like a T intersection than a Y, so I'm sure that exhaust flow can be improved here. There's 1 or 2 companies that make extractors for the AWD which includes a replacement of this pipe.
Then there's Cam timing can be adjusted, or even new cams eg from the Ralliart Magna can be installed.
Once you've finished engine mods, you can have the ECU re-tuned, either by posting an ECU to SKR (Steve Knight Racing) in S.A. or driving it to him to be tuned on a Dyno. The Qld guys have recently had him visit them and use a shops dyno to Tune a bunch of cars. He takes into account all mods and what fuel you wish to use (eg: 98 octane) and provides an ECU tune to suit.
Light weight wheels will also improve acceleration.
Cheers, Graham.
SH00T
07-03-2010, 06:37 AM
Good post Oggy.
Definately Points one and two are good value Modifications.
There is a Lukey Muffler ( LR-2779) that has a straight through Design, and it is considered an after market replacement for a VRX/Sports exhaust, and should be fairly quiet, and should not cause to much Exhaust Drone.
This is a big heavy muffler, there are smaller straight throughs around, like a magna flow, or you could use a canon. These may lead to unwanted attention (Noise), and worse, drone while accelerating or cruising.
Get down to a magna meet, and listen to a couple of peoples cars and you'll soon get the idea. Cost usually 150-300 Fitted.
Headers/Extractors are also good value. 600-800 fitted.
If you want to have your ECU retuned (600-800), which will nett you more torque down low and more power up high. Consider fitting 380/Ralliart Cams ($????), High flowCat (180-300), and a 3" Flex pipe (>100) before you do.
Above all else, Search & Read, Search & Read, Search & Read. For proven Power without wasting dough do your research. I think no-one would disagree if you followed Type40's game plan.
spud100
07-03-2010, 06:52 AM
My 2 cents worth.
Have an AWD Sports so have the freer flowing rear muffler.
Fitted a Streetfighter manifold, YES they work on the low down torque.
Just fitted extractors and have got rid of the ridiculous front to back manifold join, big improvement.
Last week during a service, had the cam gears removed, 10 minutes with a file and cams are now advanced.
This appears to have gained as much as the above mods. Consumption has imroeved 1 to 1.5 l/100, as long as I don't boot it too much.
However not stopping there. Next wil be a freer flowing CAT with 2.5" pipeowrk.
Then will be work on the heads and one of the special Graham camshafts.
Gerry
MadMax
07-03-2010, 08:08 AM
"High stall torque converter" comes to mind. Up the stall speed by 1,000 rpm and it should take off much better.
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