Stock engine, stock boost - sidemount

[tommy10101]

Hi all,

Currently building a track car that needs to be reliable for 15/20 min stints at high speed circuits, lots of sustained boost. Car is rev3 tubby and at the moment completely stock except bc coil overs, 3inch decat downpipe/exhaust and slotted discs.

Would an uprated greddy style intercooler be ok for stock boost?

I’m trying to decide between this and a st205 charge cooler and boost controller at 1.2bar

Which do you think is a more reliable setup out of these?

[MR2DI4]

Just pull the hood temperature sensor while at the track and run the fan fulltime on the stock sidemount IC.

With an otherwise stock engine and stock boost you don't need to upgrade the IC.

If you really want to go to the effort, put a bigger fan on the stock IC and make a custom alloy shroud out of a bit of 3mm sheet. This is what I did, total overkill for stock power or even a bit more boost.

The problem of a near stock MR2 on the track is the time spent on full boost compared to your average speed round the track, which ends up pretty slow so the airflow into the side vent to cool your IC is really bad. The fan running makes a big difference, an upgraded fan starts moving three times the air through the IC core.

[tommy10101]

Thanks guys. I think I will end up just going for the charge cooler. But one more question, how strong are these engines really? Would people expect me to have any problems at 1.2bar for extended track stints on standard internals? I just really don’t want it to blow:)

[MR2DI4]

Depends on the history of the engine and how well its been serviced. You dont really know what you have unless you rebuild it. Replace the fuel filter and check the fuel pressure if you do nothing else.

The fastest way to a dead engine is insufficient fuel not the intake air temperature going up a few degrees.