S8 Motor vs. A8 motor
04-09-2007, 10:33 AM
#12
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Well, the Spyker "exotica" uses the D2 S8's engine; no supercharging or engine mods.
According to the EVO (or CAR?) magazine, the only difference is an ECU change that remaps the engine and "frees up" some 60+ HP (certainly combined with a different exhaust set up).
04-09-2007, 10:51 AM
#13
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It's for the Spyker C8 Laviolette
Apparently the figure is closer to +40HP, for a total of 400HP.
<a href="http://www.evo.co.uk/carreviews/evocarreviews/205680/spyker_c8.html"> Spyker C8 </a>
<a href="http://www.evo.co.uk/carreviews/evocarreviews/205680/spyker_c8.html"> Spyker C8 </a>
04-09-2007, 01:49 PM
#14
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Spyker got 450 hp from a now discontinued model ...
... at 7800 rpm IIRC. The variable length intake manifold was gone and replaced with very short velocity stacks. I assume the cams were also more aggressive to allow HP to peak at that higher rpm.
04-09-2007, 02:01 PM
#15
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I think that was the for the real supercar, which had a highly modified Audi 4.0L V8
<a href="http://www.evo.co.uk/news/evonews/25509/spyker_c8.html"> Spyker C8 </a>
I believe the Laviolette, or Spyder version, has the S8's engine with just the ECU changed, which provides for a +40HP / 354lb ft (part of which I'm assuming is coming from the exhaust) @ 1250 kg. I wish I could locate the EVO magazine for the exact language.
<a href="http://www.spykercars.com/?pag=8"> Spyker Website </a>
I believe the Laviolette, or Spyder version, has the S8's engine with just the ECU changed, which provides for a +40HP / 354lb ft (part of which I'm assuming is coming from the exhaust) @ 1250 kg. I wish I could locate the EVO magazine for the exact language.
<a href="http://www.spykercars.com/?pag=8"> Spyker Website </a>
04-09-2007, 03:00 PM
#16
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well if its just computer...then someone needs to get on that! GIAC? APR? MTM?
not just some shabby 5-10hp increase...if spyker can get power out of the 4.2 why cant someone else?
04-09-2007, 04:05 PM
#17
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Good question, although it's a different proposition for a limited-production
exotica that runs in the $250K+ price range. S8 was a limited production vehicle, however for companies like APR and GIAC there's much more money to be made from selling chips to the turbo-based 4cyl A4s and A6 2.7T than a naturally aspirated engine. 98% of the A8/S8 owners are not looking for incremental power gains per se--the demographic for the car doesn't support such tuning. Either you get it from the factory (like AMG) or you don't. Who's going to chip an S55, for instance?
04-09-2007, 04:34 PM
#18
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Custom chip tuners are also an option when the generic aftermarket ignore you.
there's a great shop 30 mins from me with a 4-wheel dyno, Audi experience (400hp A4 avants) which primarily is a one-off custom chip creator.
04-09-2007, 07:00 PM
#20
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Sure, I had the A8 pulled on the dyno 3x for a baseline last year. He said ...
... the best he could do with the stock motor was maybe 10hp, and I forget the quote but he said something like $500 and up.