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MP62 supercharged Miata overheating.

Old 12-11-2018, 11:25 AM
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Looking for love in all the wrong places...
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Old 12-11-2018, 12:21 PM
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If your intercooler makes your car overheat, you are locating or ducting it incorrectly.
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Old 12-12-2018, 11:44 AM
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Originally Posted by sixshooter View Post
If your intercooler makes your car overheat, you are locating or ducting it incorrectly.
I installed it exactly as the instructions stated.
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Old 12-12-2018, 02:37 PM
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Originally Posted by Balto View Post
I installed it exactly as the instructions stated.
Yes, but you said it was from TDR. Not exactly the best name in product development.

Take a bunch of detailed pictures of the bumper mouth opening and around the intercooler. Let's see if we might could come up with something useful for you.
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Old 12-14-2018, 02:32 PM
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Originally Posted by sixshooter View Post
Yes, but you said it was from TDR. Not exactly the best name in product development.

Take a bunch of detailed pictures of the bumper mouth opening and around the intercooler. Let's see if we might could come up with something useful for you.
I never responded to this. I apologize sixshooter. Next time I'm up at my shop (my parents) where it is I shall take a lot of pics. Maybe you gentlemen can find something that I'm missing.

On another note, I bought a smaller pulley for the SC today, got a 65mm. No idea what's on there right now, but if I had to guess it's the biggest one (77.5 I believe?). Should go from ~6psi to 12. Going to wait to install that until after the MS3, and I have a decent tune with stock pulley first.

I have a tuning question if anyone can answer it. The current tune on my FM link is solid in terms of being knock free. I can just plug those numbers into the MS3 and have a good timing map right? I know this sounds like a silly question, but I just want to make sure. Of course fueling and general drivability are another matter.
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Old 12-14-2018, 03:44 PM
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What size is your crank pulley?

I was getting 8 psi with a 110 - 65 setup.
130 - 65 gave me 14, and I got 18.5 with 150 - 65.

DO NOT get a 150 mm crank pulley. It over-revs the charger.
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Old 12-14-2018, 04:12 PM
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Originally Posted by Godless Commie View Post
What size is your crank pulley?

I was getting 8 psi with a 110 - 65 setup.
130 - 65 gave me 14, and I got 18.5 with 150 - 65.

DO NOT get a 150 mm crank pulley. It over-revs the charger.
130/65 is what my ratio is gonna be.
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Old 12-14-2018, 04:13 PM
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If you are getting 6ish psi with a 130 - 77.5, you definitely have a leak somewhere.
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Old 12-14-2018, 04:19 PM
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Originally Posted by Godless Commie View Post
If you are getting 6ish psi with a 130 - 77.5, you definitely have a leak somewhere.
It does spike to 9psi at redline. My boost gauge may be off. Idk.
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Old 12-25-2018, 06:12 AM
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Alright boys. Finally made it up and took some pics... Ignore the coolant all over the place, I put my 65mm pulley on and it shredded the belt almost immediately. I think my belt alignment is bad.


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Old 01-10-2019, 03:36 AM
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Alright guys, until summer I can't do anything about the overheating because well, it's not doing it anymore.

Anyway, I'm having another issue. I can't, for the life of me figure out why I'm only making 8PSI boost. I'm running a Hotside BRP MP62 supercharger with a TDR intercooler setup. I just upgraded from a 77.5mm pulley on the nose to a 65mm. In the past with the 77.5, it would make about 6psi until about 6000(ish) and then spike up to 8-9 (depending on IAT) and hold there to redline. Now, it jumps to 8PSI at around 2500, but never climbs from there. I'm 100% sure I'm not getting belt slip, I know what that feels like. I also know I don't have a vacuum leak, I did a vape leak test(at least it's good for something) and nothing came up. I'm also pulling the same vacuum that I always have (about 20hg at idle). I just can't figure out why. If the math is correct with the calculators, with the 65mm nose and 130mm crank (that's stock I believe?) it should be 12psi until ~6000 then jump to 14 to redline.

I would also like to add that the rotors are in extremely good condition. I think this supercharger has very low miles on it, because I remember when I pulled it apart to pain the charger + replace nose coupler + grease the needle bearings, the needle bearings were still very greasy and not dry, the casing itself didn't have any scoring on it, and the coupler looked in really good shape (still greased bearings and replaced coupler anyway).

Another side note... I am at 3,000ft, but that shouldn't equate to a 4PSI loss.
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Old 01-10-2019, 07:04 AM
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Double check cam timing?
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Old 01-10-2019, 07:40 AM
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Originally Posted by sixshooter View Post
Double check cam timing?
I did that a long time ago after replacing the timing belt it was off a tooth and the car was running like traaaaash.

Could a worn out bypass valve cause such a condition? No idea how old it is, but I'm sure it's the OG one.
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