Hello all, ok well my tune date happened to fall on an Arizona heat warning day in August and the temperature at that time of my tune were sitting around 110 degrees. I know heat does affect power output but I'm not sure to what extent?

My 2000 Civic Si pushed 277 whp / 200 tq on 9 psi and 91 octane with...

Stock B16A2
Block bored .20 over
SRP 9.1:1 Pistons
Eagle H Beam rods
All seals and gaskets are OEM Honda.
GSR Cams
Megan Adjustable Cam Gears
Clutch Masters Stage 3
Turbonetics t3/t4 .57 trim .63 a/r (Brand New)
Full Race A/C Ramhorn
38mm Tial Wastegate 9 PSI spring
Greddy Bov
RC 550cc injectors
3” Full Race Downpipe
3” Thermal Research and Development Exhaust no Catalytic Converter
Drag i/c 6.5” height
Hondata S300
13" Spal Puller Radiator Fan
13" Spal Puller Condensor Fan



I'm perfectly happy with these numbers for the conditions but I'm curious now if I could have maybe 290 whp if it were cooler like 90 degrees? Any ideas?

 

90 degrees colder? have you tried running a coolant additive ? like redline water wetter? it make a noticable difference on a turbo car. additionally have you thought about heat wrapping exhaust components? (turbo blanket, wrapping down pipe, etc)

have you thought about upgrading your intercooler or radiator?

just a couple ideas

 

Come down when the temperature drops and I'll put your car on the dyno for free, no tuning changes, and we'll make a few pulls for ya..

On the race cars, we've seen 100+ hp drops from 70-80 degree days to 100+ degree days.