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Old 08-26-2010, 06:22 AM   #61
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How does an engine "modder" get better mileage? The only way I know how is by reducing the crankcase pressure by removing material, but then you sacrifice power...
Really? I'm not a pro at engines but I thought the best way was to make an engine more efficient, so by removing material making things smoother would allow the engine to use less air and fuel to make the same power.
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Old 08-26-2010, 06:50 AM   #62
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I can get 10+ minutes out of my vspec, it would come off the track at 307 degrees, but I can do it.
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Old 08-26-2010, 07:12 AM   #63
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I was wondering: I am currently running a 3-shoe clutch with aluminum clutch shoes and 1.0 springs. I know how to drive it, so it doesn't spin the wheels as much, but will it be better to switch one of the springs out with a 0.9? Will that give me better mileage?
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Old 08-26-2010, 07:26 AM   #64
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I'm sure someone in here has mentioned Alpha Plus engines will go 10 pretty easy in buggy and definitely over 12 in truggy.
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Old 08-26-2010, 07:29 AM   #65
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I was wondering: I am currently running a 3-shoe clutch with aluminum clutch shoes and 1.0 springs. I know how to drive it, so it doesn't spin the wheels as much, but will it be better to switch one of the springs out with a 0.9? Will that give me better mileage?
i tryed running softer springs in the past and it seemed to take away lower end power, which made me pull more trigger to clear stuff which caused me to get less fuel economy
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Old 08-26-2010, 07:31 AM   #66
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Really? I'm not a pro at engines but I thought the best way was to make an engine more efficient, so by removing material making things smoother would allow the engine to use less air and fuel to make the same power.
"Negative Ghost Rider" by removing material from inside the crank case and sleeve you effectively increase the volume which in turn makes them even more inefficient.

THE best crank case volume micro engine I have "seen" has been the old GRP. Brilliant case design, schnurl design and very compact inside.

And I don't remember anyone "modding them for mileage"
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Old 08-26-2010, 08:04 AM   #67
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"Negative Ghost Rider" by removing material from inside the crank case and sleeve you effectively increase the volume which in turn makes them even more inefficient.

THE best crank case volume micro engine I have "seen" has been the old GRP. Brilliant case design, schnurl design and very compact inside.

And I don't remember anyone "modding them for mileage"
"The pattern is full"
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Old 08-26-2010, 08:49 AM   #68
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Originally Posted by Racecrafter View Post
"Negative Ghost Rider" by removing material from inside the crank case and sleeve you effectively increase the volume which in turn makes them even more inefficient.

THE best crank case volume micro engine I have "seen" has been the old GRP. Brilliant case design, schnurl design and very compact inside.

And I don't remember anyone "modding them for mileage"
Hmm, well good thing I run the TQ 501 engine. LOL, anyway, so by what you are saying is by increasing the volume which means you can get more air and fuel inside the engine, which equals more HP, so what about the making the crank lighter, and balanced and the conecting rod, as well as smoothing flow areas? this does not allow the engine to make the same amount of power with less fuel/air but limiting epa or a smaller insert? or by going down the straight, full throttle at fitrst and back off to half I figured the engine could better sustain the same rpm?
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Old 08-26-2010, 09:55 AM   #69
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Many of my modified engines get better runtimes then their stock counterparts, as well as substantially more HP and TQ.......And none of my mods have anything to do with flow mods, my sleeves and cranks look 100% bone stock to the untrained eye !
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Old 08-26-2010, 05:45 PM   #70
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Originally Posted by pitpop View Post
How does an engine "modder" get better mileage? The only way I know how is by reducing the crankcase pressure by removing material, but then you sacrifice power...
Are you seeing better mileage with the newer Crf cranks in the Orion's your running? Same principle as that, more velocity.

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Old 08-26-2010, 05:53 PM   #71
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Are you seeing better mileage with the newer Crf cranks in the Orion's your running? Same principle as that, more velocity.

Rex
I would have to say yes. The new crank is a bit more efficient, and the crank shaft is not hogged out, so it increases crankcase pressure. The 7 port is getting mileage like the 3 port used to, and the 3 port with the new carb and crank is incredible. Around 12 minutes under the right conditions.

I give Adrien a lot of credit, he is brilliant, and a hard worker!
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Last edited by pitpop; 08-26-2010 at 06:01 PM. Reason: thought of something new :)
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Old 08-26-2010, 07:09 PM   #72
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Most people think of a modded engine all dremel work grinding it all up. I am not a big fan of that and making it hard to tune.
I assume Cody is seeing a littel crisper throttle response in the midrange also with that crank? You guys are coming to X-Fest next week aren't you?

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Old 08-27-2010, 09:03 PM   #73
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racecrafter dont you guys have to put o.s. carbs on the alphas to get them to run consistantly ALPHA PLUS = UNRELIABLE, FLAME OUTS

YOU WANT RELIABILITY RUN THE REAL ALPHA/TEAM ORION
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Old 08-27-2010, 09:31 PM   #74
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I'm sure someone in here has mentioned Alpha Plus engines will go 10 pretty easy in buggy and definitely over 12 in truggy.
+1 ... ive seen people pit at 11 min in buggy with Alpha... i cant do it with mine but ive seen it done

i get 10+ min a tank in truggy, ive pushed it to 10 min a couple times in a main when im trying to catch up and ive been fine so far
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Old 08-27-2010, 11:18 PM   #75
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i was at the track for practice today and i gained over a minute going from 7 to 8 1/2 minutes untill it died out. i went with a softer clutch setup, turned up the expo on the trottle and changed to a 6.5 restrictor. the track was wet/loomy. im thinking with the right tires and as the track grooves up it should get better runtime. my motor was running right at 210. i tried different temp guns as well. couldnt beleive my eyes. i feel like im headed in the right direction now. gotta get ready for the quals tomorrow. thanks guys.
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