10:1 NA6 M45 Race car
Race car on 93 octane. M45 just showed up. 5psi, MSPNP. I am expecting to detune slightly to stay in class.
Will I need an intercooler? |
For a higher compression race car with a super charger, I would absolutely get an intercooler.
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Assuming hotside:
Fortunately, the usual complaints associated with intercooling a supercharger, which are mostly about idle stability, are less of an issue in a track application. In general, high-compression / forced-induction Miatas tend to be knock-limited with regard to ignition timing. Thus, anything you can do to help will help. Sidebar: 1.6? Really? |
Originally Posted by ericwh
(Post 1246902)
Race car on 93 octane. M45 just showed up. 5psi, MSPNP. I am expecting to detune slightly to stay in class.
Will I need an intercooler? For race car, install an intercooler, even if it's a cheap/small one it will help a lot vs having nothing. |
Ok thanks guys. Thought it was possibly borderline but I will definitely go for it.
Sidebar, yes. I'll have plenty of power and torque for class. Shouldn't be an issue. |
don't forget to post pictures of your melted pistons afterwards.
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Either you get an IC or you can run severely retarded timing while dealing with 2-300F intake temperatures.
W/M injection is also an option, but I suspect you'll want the IC and a bigger boost pulley to make up for the pressure loss over it. |
Just to clarify, I meant I will definitely go for it - the intercooler.
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Found this, sounds like bar/plate should be good for my purposes? CX racing 27x6x2.5 be adequate?
Originally Posted by 18psi
(Post 890031)
The ebay units are not as efficient and consistent. But they get the job done...
That said it depends on what you want: tube/fin is ligher and provides better heat exchange at lower speeds bar/plate is stronger and usually flows more and better at high speeds We already discussed this at length iirc, search around. |
sure, it will already be a big improvement over the crossover tube
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Just buy 100 chipset heatsinks and attach them to the crossover tube :v
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Check with the guys at All Aspects Tuning in VA.
They run a couple of M45 track cars. From what I recall they all ran at 4 to 5psi with big intercoolers and water injection. They make around 140whp and are very responsive and pretty bullet proof. Here is some incar video I gathered from the Ultimate Track Car Challenge a few years back. |
So I ended up going with an over-the radiator setup - basically copied what comradefks had but with 2" piping.
I was using the base spark map and road-tuned to my AFR targets. First pull was pretty high on the dynojet and I pulled spark advance from the offending RPMS until I had a power curve suitable for the PT dyno reclass I wanted to run. I posted in the cooling thread this morning but no one responded: how much radiator do I need? I have ducting, hood vents, and coolant reroute but a FMIC. |
<p>Where/what temperatures do you usually race in?</p><p>I went with the 949 Crossflow. For the price, and assuming it does what it claims to do, I don't see why go any other way.</p>
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Originally Posted by turbofan
(Post 1264746)
<p>Where/what temperatures do you usually race in?</p><p>I went with the 949 Crossflow. For the price, and assuming it does what it claims to do, I don't see why go any other way.</p>
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