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no coolant sensor? engine is air cooled what to do?
Posted: Thu Mar 13, 2008 4:06 pm
by infinkc
my engine is air cooled, is there any option for the coolant sensor?
Posted: Thu Mar 13, 2008 5:01 pm
by LeslieTroyer
most people either use cylinder head temp (CHT) or oil temp. VW used CHT on their early EFI (I have a couple of CPU's from 69-72) -- On the engine I just stripped the CHT also had an oil passage up to it..
Les
Posted: Fri Mar 14, 2008 8:31 am
by steamer
I mounted a coolant sensor to the tins about 1/4" from the fins on the cylinder #2 (VW). Works fine, although I did adjust the various tables to that the engine is warmed up at 120 degrees.
Posted: Fri Mar 28, 2008 11:42 am
by devastator
I mounted my sensor inline with the external oil cooler and just modified the tables for the range I wanted.
Re: no coolant sensor? engine is air cooled what to do?
Posted: Mon Mar 31, 2008 3:30 am
by msoultan
infinkc wrote:my engine is air cooled, is there any option for the coolant sensor?
I modified the MS so that I could use the temperature range reported by my head-temp sensor on my aircooled engine (vw bus). I think this is the most reliable and responsive method.
Using the coolant sensor can be problematic, especially on warm-starts. If you have it under the engine, the sensor will cool down but the engine will stay hot. In the case of the vw bus (and other l-jet setups), I think there's a good reason that the cold-start sensor is right above the case and the EFI head-temp sensor is mounted on the heads.
see this post for more info:
viewtopic.php?t=27268&highlight=