Rate My Rack - Hot or Not?
Discussion
There has been much talk on here about power, heat, and intercoolers, so at a V-max Speed Day at Bruntingthorpe this Saturday gone, I got the catch to rate my Secan rack aloft the Banana's engine.
TB kindly brought his Bosch Hammer along
and Ruxpin bravely rode shot gun 
on a run to watch the intake temperature via the Hammer plugged into the OBD port. The results were incredible ..... the Secan is supposed to keep the intake temperature (post intercooler) within 20 degs of ambient at all times, at a 20 - 21 deg ambient the highest reading on the Hammer was 40 deg on a run to 193 mph. For ref my engine produces 533 PS / 729 NM.
As a comparison, Kennyboy kindly allowed me to passenger on a run with him in his stock 408 car and watch the intake numbers on a stock intercooler. During a run to 175 mph, the average temp was 46 deg, and a peak of 48 deg. Good stuff.
I guess the moot point here is what numbers would a tuned 993 (or any 911 turbo) 'see' with a stock intercooler if a bone stock car shows numbers 15% higher than the Secan? Interesting thought - how long will the claimed power be hanging around for during prolonged full throttle when things get hot?
More on the speed day ..... my best speed was 195 mph through the laser with the speedo just south of 200. The car felt quite frightening at such speed, and you can feel the stability peel away north of 180, as you pass through the limits the car was originally designed for
Fair play to Leon and the RT12 ..... 207 mph
TB kindly brought his Bosch Hammer along
and Ruxpin bravely rode shot gun on a run to watch the intake temperature via the Hammer plugged into the OBD port. The results were incredible ..... the Secan is supposed to keep the intake temperature (post intercooler) within 20 degs of ambient at all times, at a 20 - 21 deg ambient the highest reading on the Hammer was 40 deg on a run to 193 mph. For ref my engine produces 533 PS / 729 NM.As a comparison, Kennyboy kindly allowed me to passenger on a run with him in his stock 408 car and watch the intake numbers on a stock intercooler. During a run to 175 mph, the average temp was 46 deg, and a peak of 48 deg. Good stuff.
I guess the moot point here is what numbers would a tuned 993 (or any 911 turbo) 'see' with a stock intercooler if a bone stock car shows numbers 15% higher than the Secan? Interesting thought - how long will the claimed power be hanging around for during prolonged full throttle when things get hot?
More on the speed day ..... my best speed was 195 mph through the laser with the speedo just south of 200. The car felt quite frightening at such speed, and you can feel the stability peel away north of 180, as you pass through the limits the car was originally designed for
Fair play to Leon and the RT12 ..... 207 mph
Edited by MOD500 on Monday 9th July 10:24
fbrs said:
MOD500 said:
Fair play to Leon and the RT12 ..... 207 mph
sh1t!and if the secan's so good (and i know it is) why hasnt it just been reverse engineered?
533PS seems a little low to eclipse 190mph. Is that power at the wheels?
Whatever way you put it you have a very formidable banana.
The 533PS is from the crank on the RS engine dyno, and is comparable to Porsche type hp if you get me, and not chassis dyno type power readings. As an example, Phelix got 186 mph from his freshly rebuilt stock car with the Porsche 430 power upgrade, at the same speed day.
Regards reverse engineering the Secan, I don't know, but I understand there are VERY few sources you can procure them from.
Edited to add, re the 190+ laser speed and quoted engine power, remember the Secan keeps intake temperatures down so the ecu won't pull timing / boost as much as the stock intercooler. So you don't 'lose' as much power on a full bore run.
Regards reverse engineering the Secan, I don't know, but I understand there are VERY few sources you can procure them from.
Edited to add, re the 190+ laser speed and quoted engine power, remember the Secan keeps intake temperatures down so the ecu won't pull timing / boost as much as the stock intercooler. So you don't 'lose' as much power on a full bore run.
Edited by MOD500 on Wednesday 29th August 08:42
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