Intercooling for a M24 eaton supercharger 1

[BiggieT]

Hello everyone. My name is Tyler Girodat and I am attending the University of Saskatchewan in my first year of engineering. I am currently in a SAE club that has a fresh Honda CBR 600RR engine ready to be moded. We recieved the supercharger for free and was wondering if anyone could point me in the right direction for finding an intercooling kit including rads and housing that we could possibly work with for this project. I joined this club to learn and if anyone could help me, I would greatly appreciate it. Thank you for your time.

 

[Bribyk]

Can't help you since we don't what kind of supercharger or how you're going to mount it, etc... and this forum isn't supposed to be for FSAE/homework. Talk to an intercooler company, the one I dealt with (high on a Google search for "intercooler") was good and could easily customize the inlet/exit and mounting tabs.

 

[Bribyk]

Sorry, I guess we do know what kind of supercharger it is...

 

[kchan711]

Hi Tyler,

I happen to race Honda CBR600RRs on the CCS circuit, which is for motorcycles, not SAE cars. Before you go slapping a supercharger on that engine, you need to consider a few things.

The typical compression ratio (CR) of a CBR 600RR engine is about 12.25:1. Supercharging such an engine will lead to a dangerous knock condition, even with intercooling. The engine already requires 93 octane. You may need to consider either higher octane fuel or a reduction in the CR. And being that the engine redlines past 15,000 rpm, you may need to reconsider the radiator as well. The power you plan on demanding of the engine will require plenty of cooling.

Other than that, I would find the spec drawings (or just measure it yourself) of the supercharger mounting and design your own kit system for the bike using off-the-shelf parts. With some modeling, planning and some nifty packaging, you should be able to design a decent system.

Good luck!

Kyle

Kyle Chandler

http://www.chiefengineering.net

"To the Pessimist, the glass is half-empty. To the Optimist, the glass is half-full. To the Engineer, the glass is twice as large as it needs to be!"

 

[Bribyk]

FSAE can run 100 octane or E85, last I checked, but there's a 20 mm intake air restrictor which limits power to about 70 whp. Finding a way to drive the supercharger is probably going to be your biggest challenge on a bike engine but overheating is a common problem. Your fuel economy will be poor and I've seen some teams with superchargers run out of fuel in endurance.

 

[patprimmer]

12.25:1 it won't tolerate much boost on 100 octane.

With E85 that is on the high end of the ethanol spec, you will tolerate a bit more boost if you run very rich, but then fuel consumption rate will become a real issue.

Boost from a positive displacement pump certainly is an effective way to overcome a restrictor plate.

The manifold pressure after the plate will be a lot lower than before the plate, so the effective boost re tendency to detonate should be measured after the restrictor.


Regards

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[Bribyk]

Your restrictor has to be before the 'charger though, or every team would run a turbo- or supercharger. The restrictor doesn't have to be a plate so you can run a venturi. I haven't seen any teams running more than 8 psi of boost but that's still pushing things for bike compression ratios.

 

[Bribyk]

That 8 psi is with a 500-600cc engine, word has it one team with a low-CR 250cc engine was running ~20 psi.

Sorry, I'm a total FSAE-geek, I did it for five years.

 

[BiggieT]

Ok thank you all for your imput. We do plan on compensating for the heat problem with a twin rad set up. We have so far decided to use the eaton m24 supercharger. We plan to mount the charger above the block offset to the right of the starter, with the intercooler mounted up to pull the air down into the supercharger. All i need is a few hints on what direction to go in purchasing an intercooler and rads. If you know of any repuable companies that produce these products that would be able to convert over to the crb, it would be greatly appreciated. I am also sorry for bargin into your forum. I know i have absolutely no right to be here, but i trust you the most. I am still new to this whole forum thing and SAE, and im willing to learn anything i can in the process. Thank you for your time.

 

[Bribyk]

A local rad shop is probably your best bet, you can get exactly what you want for size, material and fittings. I used Bell Intercooler and was pleased with their service but there's other reputable companies around as well.