Dyno chart for my engine mods
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Dyno chart for my engine mods

This is a discussion on Dyno chart for my engine mods within the Grom Performance forums, part of the Honda Grom Garage category; I have an Amazon, Anodizing Racing exhaust on my 2019 Grom and last week I ordered a Dinger-Built Short Ram Intake and TB camshaft from ...

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    Dyno chart for my engine mods

    I have an Amazon, Anodizing Racing exhaust on my 2019 Grom and last week I ordered a Dinger-Built Short Ram Intake and TB camshaft from https://www.cameronjonesracing.com/ and Cameron was good enough to send me the dyno chart for this combination of mods with his ECU flash. Stock hp was 8.08 and with the mods 11.16 which is a 38 percent increase for only $325 (not including the exhaust). I'm very happy with those numbers plus I don't have to mess around with wiring.


    https://i.imgur.com/IQuk5uB.jpg
    Attached Thumbnails Attached Thumbnails Dyno chart for my engine mods-cjr-dyno-chart-my-grom-mods.jpg  
    Last edited by Alpine1.0; 09-02-2019 at 06:49 PM.
    tooter and asume like this.
    2019 Honda Grom Gayety Red
    Anodizing Racing “Amazon Special” Exhaust
    Michelin Power Pure Tires
    Neverlandback Stealth Style Mirrors
    Vagabond Motorsports Fender Eliminator and Cargo Rack
    Givi B29 Monoblock Trunk

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    That's impressive high end performance.
    My Grom putts around at low rpms almost all the time, so a bog in the torque curve at 5,000 rpms wouldn't fit my riding style, however it's perfect for everyone who runs their engine at high rpms. Trading off some bottom end in order to gain lots of top end is a pretty good deal.
    Alpine1.0 likes this.
    2018 GROM: Modified for reliability longevity gas mileage... and fun.

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    You are worried about performance, but you bought an AR exhaust? That doesn't make sense to me.
    WV_Grom likes this.

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    Quote Originally Posted by 50-50 View Post
    You are worried about performance, but you bought an AR exhaust? That doesn't make sense to me.
    I've never seen dyno results to know whether the AR exhaust is good or bad I just know that it sounds good and was affordable. In combination with the intake and cam it makes 38 percent more peak hp than stock so I'm a happy camper.
    Farmboy90 and tooter like this.
    2019 Honda Grom Gayety Red
    Anodizing Racing “Amazon Special” Exhaust
    Michelin Power Pure Tires
    Neverlandback Stealth Style Mirrors
    Vagabond Motorsports Fender Eliminator and Cargo Rack
    Givi B29 Monoblock Trunk

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    Quote Originally Posted by Alpine1.0 View Post
    I've never seen dyno results to know whether the AR exhaust is good or bad I just know that it sounds good and was affordable. In combination with the intake and cam it makes 38 percent more peak hp than stock so I'm a happy camper.
    It's cheap because it's low quality and because there's zero performance R&D put into it. At least you're happy with it.

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    Thanks for posting this! I've always been curious about the much maligned "cheaper" exhausts. I have one myself (it only cost $250 *eye roll*), and am glad to know it is working just fine.
    tooter and CDN Grom like this.

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    Quote Originally Posted by Alpine1.0 View Post
    I've never seen dyno results to know whether the AR exhaust is good or bad I just know that it sounds good and was affordable. In combination with the intake and cam it makes 38 percent more peak hp than stock so I'm a happy camper.
    I like your approach. REGARDLESS of the cost... ALL an engine responds to is the length and diameter of the head pipe.
    2018 GROM: Modified for reliability longevity gas mileage... and fun.

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    Quote Originally Posted by Farmboy90 View Post
    Thanks for posting this! I've always been curious about the much maligned "cheaper" exhausts. I have one myself (it only cost $250 *eye roll*), and am glad to know it is working just fine.
    It probably works OK...for now.

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    Muffler/baffle is huge for performance as wel

    We lost 2hp in the low end and upper-mid range not running a muffler (just a header) vs running one during testing on our 125 build last year. Interesting part was peak hp stayed they same. I’ll see if I can dig up a graph
    50-50 likes this.

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    Quote Originally Posted by jonesn View Post
    Muffler/baffle is huge for performance as wel

    We lost 2hp in the low end and upper-mid range not running a muffler (just a header) vs running one during testing on our 125 build last year. Interesting part was peak hp stayed they same. I’ll see if I can dig up a graph
    Depending on the design, mufflers can add effective length to the head pipe which increases low rpm torque.
    2018 GROM: Modified for reliability longevity gas mileage... and fun.

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