Recent content by Marshall1

With the AFRs you posted in the first run I'd do a compression check.

Heh, that car gets around. Thanks!

http://www.autotrader.com/fyc/vdp.jsp?car_id=163113559&dealer_id=&car_year=1991&make=ACURA&distance=300&max_price=31000&model=NSX&end_year=1992&advcd_on=n&min_price=23000&address=89084&search_type=used&advanced=n&start_year=1991&color=&cardist=243 Wondering if anyone know this car before I go...

Nitrous Oxide is an entirely different animal. It increases oxygen and therefore pressure in the combustion chamber and leads to greater instability, higher EGTs, no margin of error on pump gas, ect. Water absorbs a tremendous amount of heat in the combustion process giving greater stability...

This was posted by GJ a while back. Anyone have comments on this? I just don't see an $70k supercar chassis flexing to the point of uncontrollability -especially when the acceleration probably wasn't more than .5-.6g (less than cornering forces) Perhaps he was spinning the street tires? I...

Water/alky/meth injection can also give you the charge air cooling benefit of the aftercooler as well as absorbing heat in the combustion chamber -all for much cheaper ($300-$400) ...something to look into.

Thats a tricky equation to use bc of the volume change. Use T2/T1=((P2/P1)^((gamma-1)/(gamma)))/comp efficiency http://www.grc.nasa.gov/WWW/K-12/airplane/compexp.html These will give you real world numbers. Heres a quick calculator if you don't feel like plugging numbers...

It has adjustable correction factors that should handle this, as long as the sensor is mounted after the compressor.

Pretty safe looking....:( I assume timing was pretty conservative as well? The bent valves are a mystery if there were no signs of contact with the piston. Its the ones from a Dynojet (no load inertial style) showing 12.5 AFRs that are scary. You're right, we may never know why it failed...

Argg, yeah I saw you don't have the AEM logs or a wideband. Maybe #5 was damaged pre-AEM as suggested. I'm curious as to what AF is considered safe on 93 octane as many of the dynos posted here are just way too lean. I don't go past 11.0 on the dyno on a non intercooled car as that will...

What AF ratio, timing, and octane were you running? Breaking ring lands isn't the blower's fault.

You're on the right track, but there are alot of things at work here other than just displacement. You have different pressure losses through each respective engine -the 3.2 may be see more chamber pressure (power) because less pressure is lost through better heads, cams, intake, etc. A better...

Something is very wrong with those numbers. Assuming 72% compressor efficiency (about right for the Novi 2000 and most decent compressors) 6 PSI - 185 F 8 PSI - 206 F 10 PSI - 228 F 12 PSI - 248 F 14 PSI - 266 F 16 PSI - 284 F 18 PSI - 302 F 20 PSI - 318 F A 54F drop from inter or...