Results: Varioram inlet manifold fitted to a non-Varioram engine.
05-01-2012, 08:16 PM
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Results: Varioram inlet manifold fitted to a non-Varioram engine.
Hi,
After al my questions about installing a Varioram inlet manifold on a non-Varioram 993 I thought it would make sense the put the charts of my dyno-run on this forum. The first chart is the one where the 993 still has its orignal inlet manifold fitted with a 200-cell sportscat (Gert Carnewal). Top figures are:
281.1 HP and 343,9 Nm
The second chart shows the gains over the firts chart. The 993 is now fitted with a cone filter and the same 200-cell sportscat. Top figures are:
287.8 HP and 351.0 Nm
So regarding the top figures, not really worth the money and time, but the improvement in the lower RPM range is, at a certain point I gained almost 40 HP..
My 993 is a USA spec car, so it has the "long" gearbox, with this modification the car feals as it should have felt. I can only think how it would drive with the "short"gearbox...
So, bottom line is it worth all the work? I think it is, the most difficult task was to get all the parts. I was lucky that I found a gentleman who sold me the Varioram inlet manifold together with the correct ECU and would take my old manifold as a part exchange.
If you have any questions please let me know.
Last but not least, a special thanks to Joe for answering all my questions!
Regards,
Rutger
After al my questions about installing a Varioram inlet manifold on a non-Varioram 993 I thought it would make sense the put the charts of my dyno-run on this forum. The first chart is the one where the 993 still has its orignal inlet manifold fitted with a 200-cell sportscat (Gert Carnewal). Top figures are:
281.1 HP and 343,9 Nm
The second chart shows the gains over the firts chart. The 993 is now fitted with a cone filter and the same 200-cell sportscat. Top figures are:
287.8 HP and 351.0 Nm
So regarding the top figures, not really worth the money and time, but the improvement in the lower RPM range is, at a certain point I gained almost 40 HP..
My 993 is a USA spec car, so it has the "long" gearbox, with this modification the car feals as it should have felt. I can only think how it would drive with the "short"gearbox...
So, bottom line is it worth all the work? I think it is, the most difficult task was to get all the parts. I was lucky that I found a gentleman who sold me the Varioram inlet manifold together with the correct ECU and would take my old manifold as a part exchange.
If you have any questions please let me know.
Last but not least, a special thanks to Joe for answering all my questions!
Regards,
Rutger
05-01-2012, 10:54 PM
#2
My 993 is a USA spec car, so it has the "long" gearbox, with this modification the car feals as it should have felt. I can only think how it would drive with the "short"gearbox...
So, bottom line is it worth all the work? I think it is, the most difficult task was to get all the parts. I was lucky that I found a gentleman who sold me the Varioram inlet manifold together with the correct ECU and would take my old manifold as a part exchange.
If you have any questions please let me know.
Last but not least, a special thanks to Joe for answering all my questions!
I agree that the gains in midrange torque make the conversion well worth the effort. I love the upgrade. And I love it even more since I upgraded to a g50/31 gearbox and lightweight flywheel!
Cheers,
Joe
