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Thread: 2.5r?

  1. #1
    RC Racer
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    2.5r?

    What makes a 2.5r a R? Is it just a better head, or is the p/s and crank "modded" from the factory? Just curious!
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  2. #2
    RC Qualifier
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    All same, same, except the cooling head. When the 2.5r first came out, the sleeve was different. It had better porting. They have since quite making the old sleeve and only make the one. The cooling head does make some difference. I guess it allows you to run a little leaner, and still run cooler temps.
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  3. #3
    RC Racer
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    Ok..thanks for the info..i guess i just need to look for the head then
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  4. #4
    RC Turnbuckle Jr. Nitronaught's Avatar
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    Quote Originally Posted by dudelittle View Post
    Ok..thanks for the info..i guess i just need to look for the head then
    That's what I did,,, it did not make more power per say... But made tuning a little easier and not quite as quickly to spike in temps like a cast head would...
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