I need some help/input regarding the factory Hp ratings for the 88-91 Civic/CRX Si's. Some of the other threads have posted opinions that the factory rating of 105 Hp is a low number.

I would like to hear any wheel Hp numbers from STOCK Si's including the dyno model that the numbers were derived on.

And I would like to hear from anyone in the NorthWest who has a STOCk Si and is willing to let their car be subjected to a compression test and dyno run.

The reason for these requests is ICSCC rules for Production classed cars base the class assignment off a "factory listed Hp" to pound formula. The above Hondas end up in F-Prod at 20 pounds per Hp. They are faster in a straight line than many of the E-Prod cars (VW 16v, Neons, 200sx, 1800 Miatas, BMW 318i, etc.) which has led me to the hypothesis that the factory listed Hp is actually quite low. I suspect that the true crank Hp should be in the 117-123 range and that we should reclass them into E-Prod.

FYI-Conference Production cars are extremely similar to SCCA IT. IT cars are legal with the removal of headers.

Thanks in advance,

Rick

 

rick, our club did some dyno runs and found that either stock, old/used/abused, new, header, intake or whatever basic mod basically came up with 110whp. so i would say that yes, the d16a6 is very underated from the factory. how else do you think we can get 125+ out of these a6's...



each one of these graphs is a separate d16a6. mine is green, used a pg7 ecu and z6 fuel pressure regulator, plus header and gutted cat to stock muffler as you saw my car at thunderhill. interestingly, the red one is an old previously turbo'd engine that was spitting out lots of oil during the run, still made pretty much the same power as my 40k mile engine from factory.

 

I've seen two dyno in the mid 90's bone stock with high milage.

 

What type and model of dyno were you on?

 

we tested at race prep engineering. basically a garage with a DynoJet the shop owner can sell his turbo kits out of. the dyno is really new and barely used.

http://www.raceprep.net/

 

dodge under rated the srt 4 my friend just got one and put 240 to the wheels completley stock at cp3 in penn

 

And that's relevant, how?

 

105hp is strictly for the 88si's due to the less agressive cam. The 89-91 a6's produce a tad more, slightly more duration and lift. (108hp) Every stock A6 I've ever seen dyno'd was around 90~95whp

 

sorry, but the 88 and 89-91 cams have the same lift and duration.

The 1988 cams were ground at the D15 indexing point/keyway.

The cam timing is all that is changed. This is why a 88 motors feel more torquey, because they are with the "advanced" cam timing.