question?-when mounting fans to the engine lid on mr2 turbo, would it be better to pull air from the engine bay out or pull air from the outside and into the engine bay?
Air comes in the sides and from the bottom and out through the engine lid. So I'm pretty sure that the fans on the engine lids push air out of the engine bay.
I was also thinking about wiring them so I could turn them on and off at will. and letting them run when in slow moving traffic or stopped. it gets hot here in the south. do you think that pulling air out of the engine bay under those conditions would still be best?
I would suggest putting a push and a puller SPAL fan (2 fans) on your intercooler and leaving the fans off of your engine lid.
That is how I have mine and I have them set up to a switch that turns the SENSOR for the fans off and on. What does that mean exactly? It means I have two options:
1. The fans are on.
2. The sensor to turn the fans on is on.
This way I can coo lthe engine bay before I think I am going to need it and to help prevent heat soaking of my IC. But, when I am not doing that, the sensor is still doing it's job by turning the fans on when it gets hot enough and calls for them.
Fans on the engine lid are in the way at speed and inhibit air flow.
I'm preparing my N/A MR2 to get back out on the circuit soon. I was thinking about installing fans underneath the engine lids to suck the hot air out. The N/A MR2's don't have fans as standard on the lids and it's a 3sge motor. What do you think? Waste of money/time or should I just get a bigger radiator?
__________________
I don't suffer insanity, I enjoy every minute of it.
Unless something has failed on your MR2, you will not overheat it. The stock engine cooling system is extremely over-engineered. A larger radiator would just slow you down with excess weight ... and if it managed to make your coolant temps cooler, it would hurt performance.
The only point of having fans around the engine in an MR2 is eliminate heat-soaking of the intercooler and/or reducing the intake temps. That being said, fans on the engine lid of an NA MR2 are pointless.
just a question, wouldnt putting fans on the engine lid that pull air into the engine compartment cause the back end to be loose at high speed due to all the air trying to escape underneath the car? i would think that it would but what does everyone else think
__________________
complete JDM Gen 2 engine, Tubular stainless manifold and 3" downpipe, Turbo XS Type H RFL blow-off-valve, Konig Holes 17" rims, Faze Boost Gauge, soon: HKS Vein Pressure Converter & Fuel Cut Defender, KYB AGX Struts, RS*R RACE Springs
At speed, the air coming into the engine bay from underneath and the side vents would most likely stop the fans from spinning if you had them pushing air into the engine bay. It defies logic to put pusher fans on the engine lid of an MR2 since that is contrary to air flow ... you want to pull air out.
Again, the only reason you would want fans on the lid is to help prevent heat soaking of your intercooler.
MR2BAD where did you get your fan? And for how much?
still using stock fan. after the input from the others on the forum, I've decided not to put engine lid fans. I will upgrade to Spal fans when I upgrade my IC.. Ebay carries Spal as do many perfomance shops..
The AutoGuide.com network consists of the largest network of enthusiast-owned enthusiast-operated automotive communities.
AutoGuide.com provides the latest car reviews, auto show coverage, new car prices, and automotive news. The AutoGuide network operates more than 100 automotive forums where our users consult peers for shopping information and advice, and share opinions as a community.
ToyotaNation.com is an independent Toyota/Lexus enthusiast website. ToyotaNation.com is not sponsored by or in any way affiliated with Toyota Motor Sales, USA, Inc. The Toyota, Lexus and Scion names and logos are trademarks owned by Toyota Motor Sales, USA, Inc.
Forum for every generation Toyota MR2. Including the AW11 and SW20.
Linear Mode
