Dynograph from new Gtech Competition
Thread Starter
Burning Brakes
Joined: Nov 2002
Posts: 761
Likes: 0
From: 2 ends of the Pacific
Dynograph from new Gtech Competition
Finally the PC software for the GTech Competition is available online. Downloaded, tried it and worked the first time.
Below is Plot of my HP/Torque run done about 3 months back after new exhaust system but prior to my engine rebuild. Cool Gadget!!
[URL=http://photos.yahoo.com/bc/dennisgoh/vwp?.dir=/Porsche+964&.src=ph&.dnm=Dyno+Header+PreBuild.jpg&.view=t&.done=http%3a//photos.yahoo.com/bc/dennisgoh/lst%3f%26.dir=/Porsche%2b 964%2]
Below is Plot of my HP/Torque run done about 3 months back after new exhaust system but prior to my engine rebuild. Cool Gadget!!
[URL=http://photos.yahoo.com/bc/dennisgoh/vwp?.dir=/Porsche+964&.src=ph&.dnm=Dyno+Header+PreBuild.jpg&.view=t&.done=http%3a//photos.yahoo.com/bc/dennisgoh/lst%3f%26.dir=/Porsche%2b 964%2]
Drifting
Joined: Nov 2001
Posts: 2,689
Likes: 5
From: Leeds, where I have run into this many lamp
Great looking exhaust system. Any comments about the set-up?? I take it you've lost heating!!
YOu had this custom fabricated didn't you??
Is engine rebuild going to be 'stock' or are you adding lots of lightweight/high performance bits?
YOu had this custom fabricated didn't you??
Is engine rebuild going to be 'stock' or are you adding lots of lightweight/high performance bits?
Thread Starter
Burning Brakes
Joined: Nov 2002
Posts: 761
Likes: 0
From: 2 ends of the Pacific
Most importantly the setup gave me 11% increase in HP and Torque at peak compared to previous primary bypass setup. The entire torque and hp curve is also shifted upwards so more ooomph all round from idle up. (all this measured on Gtech competition averaged over 5-7 runs)
The exhaust note is quite unique. It's no longer lumpy (ie. non-boxer engine sound) but idles with smooth purr rather than "burp burp burp...". It also has a metallic overtone from the headers.
Rev it and the pitch increases at twice the rate of the stock (ie. at 2000rpm it sounds like 4000 rpm and so on).
At constant speed cruising, it is quiet inside and outside. In fact at 4,000 rpm on 4th you dont hear the exhaust/engine anymore as it is drowned by tire and aircon noise with windows up. Its definitely quieter than my friend's 993 with stock exhaust and motorsport airbox (expensive porsche drilled airbox
)
When you floor it, it screams outside the car at a high pitch....really loud....louder than primary or secondary bypass - more like a race car sound. But strangely in the cabin with windows up, it's a pleasant racy engine note - not loud at all.
An ex-ferrari and now porsche mechanic said it sounds like a cross between a 993RS and a Testarossa but unlike both. Go figure. I will shoot some videos once my engine is run-in - that'll give the best picture.
Oh yes, custom fabricated with raw materials from various sources. Designed (ie. lengths, diameters, cross-over points) on a header design software and blue-printed on Macromedia Freehand. No heating needed because where I live there's more heat than is good for the health.
Engine is stock (broke into cold sweat when my refurbishment project budget overan by 2X) but mine's an 89 so lighter single mass flywheel, RUF chipped. Was considering motorsport cams, autronic engine management and 3.8L but that would mean my budget overrun would be 3X....2 months after project completion....kinda regret I didn't do it.
The exhaust note is quite unique. It's no longer lumpy (ie. non-boxer engine sound) but idles with smooth purr rather than "burp burp burp...". It also has a metallic overtone from the headers.
Rev it and the pitch increases at twice the rate of the stock (ie. at 2000rpm it sounds like 4000 rpm and so on).
At constant speed cruising, it is quiet inside and outside. In fact at 4,000 rpm on 4th you dont hear the exhaust/engine anymore as it is drowned by tire and aircon noise with windows up. Its definitely quieter than my friend's 993 with stock exhaust and motorsport airbox (expensive porsche drilled airbox
)When you floor it, it screams outside the car at a high pitch....really loud....louder than primary or secondary bypass - more like a race car sound. But strangely in the cabin with windows up, it's a pleasant racy engine note - not loud at all.
An ex-ferrari and now porsche mechanic said it sounds like a cross between a 993RS and a Testarossa but unlike both. Go figure. I will shoot some videos once my engine is run-in - that'll give the best picture.
Oh yes, custom fabricated with raw materials from various sources. Designed (ie. lengths, diameters, cross-over points) on a header design software and blue-printed on Macromedia Freehand. No heating needed because where I live there's more heat than is good for the health.
Engine is stock (broke into cold sweat when my refurbishment project budget overan by 2X) but mine's an 89 so lighter single mass flywheel, RUF chipped. Was considering motorsport cams, autronic engine management and 3.8L but that would mean my budget overrun would be 3X....2 months after project completion....kinda regret I didn't do it.