racer rx

Hi guys,

Could someone explain why?: When my car is hot and I shut it off for about 10 minutes then re-start it, it idles
really low about 600 rpm and fluctuates 600 - 750 rpm.

As soon as I get moving, it comes back to normal idle after about 3 more minutes. About 850 rpm.

I have a street ported engine with usual mods.
I/c / ecu / hurley racing 3mms / intake /

Could this be a vaccuum leak somewhere?

jc.

Talek

Heat soak, it's normal. You can minimize it by getting a turbo timer, letting it cool down sufficiently, and mod the fans to keep blowing after the car's been shut off for a bit. But it'll always be there.

racer rx

I have a turbo timer. I usually have it idle for 1.5 mins.
for normal driving and 3 mins for some decent runs.

I always drive slowly in my neighborhood to let the turbos cool down and keep the noise down. Then use the t-timer as well.

Is this normal for streetported engines? Heatsoak?

jc.

Street King

That basiclly is heatsoak. I see no upgrades in the cooling system in your car, so if you want to have less affects from heatsak I suggest you give the cooling system a little attention.

A turbo timer will help out some BUT the engine is producing the same heat as before, just cools the oil a bit as to not fry inside your turbos. What kind of aftermarket IC do you have, is it a FMIC or a SMIC. FMIC tend to heat soke more than SMIC because they are in front of the radiator. Drop a fluidyne or a koyo with some watter wetter and 45/55 coolant to water(higher coolant than normal since you live in canada) and that should help out a lot.

Remember when you add mods to make more hp, your are producing more heat and the FD's cooling system just wont cut it.

racer rx

Thanks Street King, very informative!

I have the M2 large. Stock cooling system. Could I switch to the Evan's stuff for better cooling than just coolant and water?

Any drawbacks to this Evan's stuff? jc

Street King

I see no drawbacks from the evans coolant. In fact everybody that has used it(which I donot know them personally) love it. I think with the evans coolant you will ove it but iam not sure if you need it seeing you live in Canada, but I guess every little bit helps.

It seems to me you just need to upgrade the cooling system.

Also how do you like the M2 large. Iam deciding which one I should use, large or medium. Also what intake are you using to go with the IC.

racer rx

hi Street King,

I will try the Evans sometime here this summer. And will maybe get a Koyo rad.

I do like the M2 large. However sometime in Hot summer stop and go traffic it gets quite hot to the touch.

When crusing on the freeways then checked for heat, it's quite cool. I have the N-tech intake now.

The I/c I had before was the Greddy stock mount... that was pretty good too. I think the M2 has a better duct.
Cause the Greddy uses the stock duct.

cheers jc.