Intercooler Contribution
#1
Scooby Regular
Thread Starter
Join Date: Oct 2002
Location: ex UK [SE], now Sunshine State [QLD,AUS]
Posts: 565
Likes: 0
Received 1 Like
on
1 Post
Intercooler Contribution
Just wondering what contribution the intercooler makes, in terms of more power/torque then without one.
ie on a 300 bhp (at the flywheel) scooby, at say 100 mph at 25º Celcius air temp.
Hope that's enough info......
ie on a 300 bhp (at the flywheel) scooby, at say 100 mph at 25º Celcius air temp.
Hope that's enough info......
#2
Scooby Regular
iTrader: (2)
An IC helps retain power, not adds power.
Generally, if that 100 mph was at cruise, then the IC would just be rmeoving heat soak and a little of the heat from compression. The charge temp out of the IC will be at or just above your air temp on a well designed IC and duct arrangement.
At peak boost, the turbo outlet temp may up to IRO 130 deg C. The IC now has to drop the charge temp by 130-25 dec C in order to avoid any power loss.
So the extra info needed is your air flow and charge temp at 100 mph to give a good estimate of power loss.
This website gives a good idea of the IC is doing:
Stealth 316 - Turbo Outlet Temperature
Nick
Generally, if that 100 mph was at cruise, then the IC would just be rmeoving heat soak and a little of the heat from compression. The charge temp out of the IC will be at or just above your air temp on a well designed IC and duct arrangement.
At peak boost, the turbo outlet temp may up to IRO 130 deg C. The IC now has to drop the charge temp by 130-25 dec C in order to avoid any power loss.
So the extra info needed is your air flow and charge temp at 100 mph to give a good estimate of power loss.
This website gives a good idea of the IC is doing:
Stealth 316 - Turbo Outlet Temperature
Nick
#3
Scooby Regular
WIthout the IC you simply couldn't have a 300bhp Scooby. There's no way an ECU could run enough boost to make 300bhp out of 2 litres without an intercooled turbo system or an incredible engine build revving to 15000 rpm. You could perhaps run a very light pressure turbo which would hardly be worth having, and be looking at the kind of power figures a 2.0 Sport makes, normally aspirated. But a turbo by its very nature as a compressor, puts a hell of a lot of heat into the inlet charge. Even the most weedy IC can dump a hell of a lot of heat quickly. If you ever get hold of one, stick a hot hairdryer in one side and feel the stone cold air come out the other. This effect won't last long of course with a small IC, but it's better than blasting 100-200C charge air into the combustion chamber and then expecting to make any kind of repeatable power.
Thread
Thread Starter
Forum
Replies
Last Post
Flat4x4-again
General Technical
2
29 September 2015 06:32 PM