Quote:
Originally Posted by thstone
OK, let's talk horsepower.
At the AutoClub Speedway race, the POC had a dyno to measure power output at the rear wheels (there is currently no maximum power spec). The top 3 qualifiers and top 3 race finishers were required to have their cars tested. I had mine tested of my own desire.
Here are three data points;
My Car: 196hp
Car 2: 187hp
Car 3: 203hp
From my perspective, its good news that my $1,800 salvage yard, never been opened, previous tiptronic, engine with 90,000 prior miles still managed 196hp at the rear wheels!
Of course, you might be wondering: with a rating of 200hp at the crank, how can I get 194hp at the rear wheels from a stock engine?
200hp at the crank
- 20hp 10% driveline loss
+ 7hp TopSpeed cat back exhaust (verified on dyno: Spec Boxster Build)
+ 5hp Removal of cat's (verified on dyno)
+ 5hp Under drive pulley (per other testing)
________
196 hp net at the rear wheels |
Nice plug for the junk yard :-)
What is allowed in an engine rebuild? Can you custom make the rings?
What limits are there on the valve job.
IMS retrofit isn't going to get you anything.
Anything else would seem to be illegal.
What weight oil do you guys run?
Could you alter the cam to exhaust timing on the vario-cam by displacing a tooth and still not have interference but gain anything?
Note I don't race spec boxster -- but I've been involved in a few M96 rebuilds and its not hard to accidentally alter the vari-cam timing during install (but I've always caught it :-).
Mike