Cooldown procedure question
07-31-14, 05:47 AM
#1
Cooldown procedure question
Would it be better to coast/neutral the fd going freeway speeds to cool down the car, or just to drive it normally and let it idle afterwards? I usually try not to engage the turbos within the last few minutes of driving. I live very close to the freeway entrance/exit so I basically let the fd roll home. I don't know what's best, or if it even matters. I got home tonight, did my normal brief idle. Opened the hood to let it vent and the strut bar, radiator cap, and everything else was extremely hot on a 65F night. I just want to make this mamajama last as long as I could before a rebuild. Everything is stock besides a wrapped downpipe. I have no gauges yet, so I'm just paranoid in a way. Also, what are everyones thought on a prolonged neutral coast at high speeds? Good or bad?
07-31-14, 07:12 AM
#2
People get in the habbit of over doing things with the fd. Stay off boost and keep the engine in vacuum is how you properly cool it down a mile or so before shut down. You need the air flow through your heat exchangers (oil cooler and radiator) to rapidly cool the fluids. Idling doesn't do this. The air flow is also how you keep from cooking all the turbo components in the engine after shutdown because they will be much cooler. No need to wear out your hood cable opening the hood. I daily drove my fd in the hot south so we had 100 degree days all the time. My original engine lasted over 100k and was perfectly reliable with proper working sequentials so I know from experience.
07-31-14, 10:42 AM
#4
^^ Agreed with the above posters.
Don't stress, if your coolant temps are okay, the car will be fine. Back with the stock hood, on really hot days, I'd simply stay out of boost for a few mins and lightly coast back to my home. After parking, I'd pop the hood for a few mins. That motor is approaching 80+k miles without a hiccup.
Vented hood helps alot. I can see the heat waves coming out after shutdown. The only way to truly cool down a sitting car would be electric water pump and battery powered fans with motor off.
Don't stress, if your coolant temps are okay, the car will be fine. Back with the stock hood, on really hot days, I'd simply stay out of boost for a few mins and lightly coast back to my home. After parking, I'd pop the hood for a few mins. That motor is approaching 80+k miles without a hiccup.
Vented hood helps alot. I can see the heat waves coming out after shutdown. The only way to truly cool down a sitting car would be electric water pump and battery powered fans with motor off.
07-31-14, 05:38 PM
#6
Moderator
iTrader: (3)
Join Date: Mar 2001
Location: https://www2.mazda.com/en/100th/
Posts: 30,835
Received 2,604 Likes
on
1,847 Posts
lmao, gauges will make this worse.
+1 right. i had gauges in my FD for while, and the coolers work with vehicle speed more than anything else.
so coasting off the freeway is a good idea, sitting there idling is bad
People get in the habbit of over doing things with the fd. Stay off boost and keep the engine in vacuum is how you properly cool it down a mile or so before shut down. You need the air flow through your heat exchangers (oil cooler and radiator) to rapidly cool the fluids. Idling doesn't do this. The air flow is also how you keep from cooking all the turbo components in the engine after shutdown because they will be much cooler. No need to wear out your hood cable opening the hood. I daily drove my fd in the hot south so we had 100 degree days all the time. My original engine lasted over 100k and was perfectly reliable with proper working sequentials so I know from experience.
so coasting off the freeway is a good idea, sitting there idling is bad
Thread
Thread Starter
Forum
Replies
Last Post
Nosferatu
2nd Generation Specific (1986-1992)
7
09-05-15 02:13 PM