Miatas Before the Gap Aug 1st 2019
#42
Awesome, just let us know when you're ready to go
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#43
I wish my camera was working - I had some fun trying to chase down a couple of those K cars in the Red group. I'd love to have gotten a ride in one as well, but all my time outside the run groups was spent instructing or trying to cool off.
I also found out that the weather was worth about 5mph on the top end (~105 IAT this event compared to 75 the last go around).
I also found out that the weather was worth about 5mph on the top end (~105 IAT this event compared to 75 the last go around).
#44
Anyone with a turbo BP engine care to share water temps and cooling setups from this event? I'm running a Supermiata radiator, no reroute, hacked up factory under tray and Singular vents. I was seeing about 225F towards the end of some of the afternoon sessions, which led me to back off a bit.
#46
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Anyone with a turbo BP engine care to share water temps and cooling setups from this event? I'm running a Supermiata radiator, no reroute, hacked up factory under tray and Singular vents. I was seeing about 225F towards the end of some of the afternoon sessions, which led me to back off a bit.
Max MAT = 130. Max CLT = 210. Running 50/50 coolant. Thus, I could likely survive hotter ambients If I ran less coolant and more water, possibly with water wetter.
If I wanted to run more power, I would want a better intercooler.
Re-route is Step 1 in my opinion.
#47
I only saw 110F for MAT, but my FMIC takes up the whole grille opening and the factory front air duct basically forces all the air through the opening through the FMIC before the radiator.
Might end up with a reroute after all, which I was hoping to avoid on account of the factory VVT head gasket.
Might end up with a reroute after all, which I was hoping to avoid on account of the factory VVT head gasket.
#48
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Just spitballing here, which do you think might be more important, Inlet air temperature or coolant temperature? I would prioritize my placement of coolers appropriately for whatever my answer was.
My set up allows the air to travel above below and beside the intercooler on its way to the radiator because my radiator needs all the help it can get.
My set up allows the air to travel above below and beside the intercooler on its way to the radiator because my radiator needs all the help it can get.
#49
Just spitballing here, which do you think might be more important, Inlet air temperature or coolant temperature? I would prioritize my placement of coolers appropriately for whatever my answer was.
My set up allows the air to travel above below and beside the intercooler on its way to the radiator because my radiator needs all the help it can get.
My set up allows the air to travel above below and beside the intercooler on its way to the radiator because my radiator needs all the help it can get.
Pick your poison.
#50
I may experiment with removing the front plastic baffle to let some air flow around the intercooler and to the radiator. 3 days at Grid Life coming up at the end of August is sure to be hot as ***** so I'd like to have something figured out for then, though Road Atlanta isn't as bad as AMP for heat/air flow it seems. Are high intake temps more likely to cause knock than high water temps are to cause mechanical damage? I don't think mechanical damage will happen at 230F based on my experience with other engines, but I may be wrong.
#51
AMP is so short that you don't really have a chance to cool down except between 16 & 1 (AMP is like a super-long autox course). RA is more typical of a long-ish road course.
I'd defer to the "real racers" on here, but my mind says that engines don't "like" hot air (thus intercoolers and the like), so high IATs = bad news. My (ancient) thermodynamics brain says, high temps = less ability to hold fuel in suspension = leaner mixtures = higher potential for pre-ignition/knock/detonation = crankcase ventilation.
In my car, I don't see temps much over 210F, even heat-soaked on I-285 in a traffic jam. Anything above that and I'd be parked on the side of the road waiting for things to cool down. Call me paranoid, but I've spun bearings because of oil starvation so anything that even HINTS of that gives me the *******.
I'd defer to the "real racers" on here, but my mind says that engines don't "like" hot air (thus intercoolers and the like), so high IATs = bad news. My (ancient) thermodynamics brain says, high temps = less ability to hold fuel in suspension = leaner mixtures = higher potential for pre-ignition/knock/detonation = crankcase ventilation.
In my car, I don't see temps much over 210F, even heat-soaked on I-285 in a traffic jam. Anything above that and I'd be parked on the side of the road waiting for things to cool down. Call me paranoid, but I've spun bearings because of oil starvation so anything that even HINTS of that gives me the *******.
#58
Morello, I was overheating that day too. 1.6L running 10psi, SuperMiata radiator, reroute. Was’t data logging, but the stock temp gauge was unhappy. Went back the next week, same problem. I think AMP is just tough, heavy on the throttle with no long straights for airflow. Going back on Saturday, going to switch to straight water (currently running 1/3 antifreeze).
#59
Morello, I was overheating that day too. 1.6L running 10psi, SuperMiata radiator, reroute. Was’t data logging, but the stock temp gauge was unhappy. Went back the next week, same problem. I think AMP is just tough, heavy on the throttle with no long straights for airflow. Going back on Saturday, going to switch to straight water (currently running 1/3 antifreeze).
I'll try to siphon a quart out and run some water wetter for the next event to see if that helps.. I also had a couple folks recommend punching holes in the bumper above the intercooler to feed some air directly into the radiator cavity...
Last edited by Morello; 08-26-2019 at 09:15 AM.