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The Dynamite MACH 427? Pro's/Con's

Old 03-17-2008, 08:20 AM
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Minkis815
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Default The Dynamite MACH 427? Pro's/Con's

I currently purchased a MACH 427 for my Aftershock. Is their anything bad about this motor? And What should i use for fuel? I've been Running Byron's 20% in the stock motor and i love it. i use to use O'Donnell's 20% race but i switched to try to make my motor last longer. so far no complaints about either fuel.
Old 03-17-2008, 09:12 AM
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HpiDrifter420
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Default RE: The Dynamite MACH 427? Pro's/Con's

the 427 is a great engine there really arent any bad points about it. its fairly cheap and gives good power.
Old 03-17-2008, 05:35 PM
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full maxx
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Default RE: The Dynamite MACH 427? Pro's/Con's

ditto ... i replaced mine with the teal head and have no complaints
Old 03-17-2008, 06:12 PM
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R/C Lightweight
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Default RE: The Dynamite MACH 427? Pro's/Con's

Let me know if there's much difference in your Aftershock after the 427 motor swap. I thought about doing the same thing when my M26SS bites the dust. Can anyone comment on how these 2 engines compare to each other? Seems like the 427 must be good, as Losi puts it in their best vehicles? But is there really any difference in torque and top end over the M26SS? They are both .26 engines right?
Old 03-17-2008, 06:30 PM
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Default RE: The Dynamite MACH 427? Pro's/Con's


ORIGINAL: R/C Lightweight

Let me know if there's much difference in your Aftershock after the 427 motor swap. I thought about doing the same thing when my M26SS bites the dust. Can anyone comment on how these 2 engines compare to each other? Seems like the 427 must be good, as Losi puts it in their best vehicles? But is there really any difference in torque and top end over the M26SS? They are both .26 engines right?
The 427 is lightly larger, but has more ports (7 vs 3)
Its a sweet engine, esp teh teal head variant
Old 03-17-2008, 06:57 PM
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Default RE: The Dynamite MACH 427? Pro's/Con's

IL2mSturmovik, I see you have both the 427 and the LRP engines in your race vehicles. I know they are installed in two completely different machines, but which engine do you prefer? I hear lots of good things about both (as well as the Picco .28). Which engine feels like it produces more usable power over the entire RPM range? Just curious.
Old 03-17-2008, 07:24 PM
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Default RE: The Dynamite MACH 427? Pro's/Con's


ORIGINAL: R/C Lightweight

IL2mSturmovik, I see you have both the 427 and the LRP engines in your race vehicles. I know they are installed in two completely different machines, but which engine do you prefer? I hear lots of good things about both (as well as the Picco .28). Which engine feels like it produces more usable power over the entire RPM range? Just curious.

Great question.
Without a doubt the LRP is the better engine for the LST2, thought the teal head 427 is really close.
The biggest difference to me that I feel, is although the LRP Spec3 makes more power everywhere, it seems to deliver it in a less violent manner, in my LST2.
More power and better managebility is my thoughts on those two engines in the LST2. A kinder power curve, if you will.
In my CRT, the 427 (teal head variant) is incredibly fast, and seems to work very nicely. I really could not see a reason to change to the LRP in it, perhaps its the top end pipe that makes it kinder and less of a hit that the HT pipe I run in my LST2. I did run my LRP in the Jammin for a practice session, and its just WAY too much imho for the CRT.
I hope that helps you. They are both great engines.
Old 03-17-2008, 08:19 PM
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Default RE: The Dynamite MACH 427? Pro's/Con's

Ok. so far all i've herd is good things about the 427. is their anything bad about it? I havent installed the motor yet but i am very excited about it.
Old 03-17-2008, 08:34 PM
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Yub, yub, cmdr!
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Default RE: The Dynamite MACH 427? Pro's/Con's

So a Orange to Teal Head conversion is just a new glow plug head and a new carb? (this ignores the cosmetic head change)
Old 03-17-2008, 08:34 PM
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Default RE: The Dynamite MACH 427? Pro's/Con's

i have been through two so far w/o complaint however you may want to seal the engine before you install it ... it will help tuning issues later
Old 03-17-2008, 08:49 PM
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Default RE: The Dynamite MACH 427? Pro's/Con's

Thanks. what should i use for a sealer? I'm a professional motorcycle tech. would hondabond work or should i use aomething designed for nitro motors?
Old 03-17-2008, 10:22 PM
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Default RE: The Dynamite MACH 427? Pro's/Con's


ORIGINAL: IL2mSturmovik

Great question.
Without a doubt the LRP is the better engine for the LST2, thought the teal head 427 is really close.
The biggest difference to me that I feel, is although the LRP Spec3 makes more power everywhere, it seems to deliver it in a less violent manner, in my LST2.
More power and better managebility is my thoughts on those two engines in the LST2. A kinder power curve, if you will.
In my CRT, the 427 (teal head variant) is incredibly fast, and seems to work very nicely. I really could not see a reason to change to the LRP in it, perhaps its the top end pipe that makes it kinder and less of a hit that the HT pipe I run in my LST2. I did run my LRP in the Jammin for a practice session, and its just WAY too much imho for the CRT.
I hope that helps you. They are both great engines.
Thank you for that very in depth evaluation. Very informative and useful down the road for when replacement time rolls around. Sounds like you can't lose either way you go, but perhaps the LRP likes the high torque pipe and is best suited to heavier vehicles such as MTs. I'm intrigued by the possibilities here. Thanks again.
Old 03-18-2008, 08:20 AM
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Default RE: The Dynamite MACH 427? Pro's/Con's

If anyone wants to see the abuse I put my aftershock through go to my myspace Myspace.com/kyle1987618 I did this jump when it was 3 days old. only mod's where the DX2.0. Thats it. this truck is a monster!!! even STOCK.
Old 03-23-2008, 07:58 PM
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Larryb20
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Default RE: The Dynamite MACH 427? Pro's/Con's

Does anyone have a link for the teal head conversion?
Old 03-24-2008, 12:54 AM
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Default RE: The Dynamite MACH 427? Pro's/Con's


ORIGINAL: Larryb20

Does anyone have a link for the teal head conversion?
got mine from ebay ...i think it came from an 8 t or b
Old 03-24-2008, 06:46 PM
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Default RE: The Dynamite MACH 427? Pro's/Con's

minkis haha whats up kyle. your new mach 427 ios awsome way better then the other one, good choice
Old 03-24-2008, 09:13 PM
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Default RE: The Dynamite MACH 427? Pro's/Con's


ORIGINAL: Yub, yub, cmdr!

So a Orange to Teal Head conversion is just a new glow plug head and a new carb? (this ignores the cosmetic head change)

No.
Known differences:
Teal head has larger carb
Teal head has higher compression head button.
Teal head has different piston and sleeve.
And of course, the teal colored head, lol
Old 03-24-2008, 09:17 PM
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Default RE: The Dynamite MACH 427? Pro's/Con's

If it's rated at the same HP and RPM's then what gives?
Old 03-24-2008, 09:28 PM
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Default RE: The Dynamite MACH 427? Pro's/Con's


ORIGINAL: funman1

If it's rated at the same HP and RPM's then what gives?

I dunno, but peak hp and rpms are just a piece of an engines power delivery.
Look at the OS28 vs teh Ninja/GRP 28
The OS makes more peak hp, but teh Ninja will run away from it
Why?
The power curve. It makes more power over a larger rpm range, which I will bet is the case with the Teal head 427.
I have had (actually still do) both variants, and the teal head is unquestionably stronger.
Old 03-24-2008, 09:30 PM
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Default RE: The Dynamite MACH 427? Pro's/Con's

hmm odd...

Thanks for the clarification, makes a bit more sense now..
Old 03-26-2008, 08:14 AM
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Default RE: The Dynamite MACH 427? Pro's/Con's

Ok i finally installed the MACH 427 and let me tell you... OMG what a difference!!! I love it. Amazing power delivery and excellent performance. It's like a different vehicle. i dont have anything bad to say about this sweet motor. thank you every one for your info.
Old 03-26-2008, 08:49 AM
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Default RE: The Dynamite MACH 427? Pro's/Con's

I've got a 427 on the way. The only real pro/con I've heard is the 427 gives up power to the spec 3 but the power delivery of the 427 makes it easier to drive?
Old 03-26-2008, 03:40 PM
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Default RE: The Dynamite MACH 427? Pro's/Con's


ORIGINAL: Grits

I've got a 427 on the way. The only real pro/con I've heard is the 427 gives up power to the spec 3 but the power delivery of the 427 makes it easier to drive?

Actually IMO the 427 has a harder "hit" in the power curve.
The LRP makes more power everywhere, but its smoother power.
Read my other posts in this thread again, friendPerhaps a good comparo would be the power characteristics of a 2 stroke 250 (the 427) vs a 4 stroke 450 motorcycle (the LRP)
Old 03-26-2008, 04:09 PM
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Default RE: The Dynamite MACH 427? Pro's/Con's

Is there a price dif between the orange and teal heads variants?
Old 03-26-2008, 05:20 PM
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Default RE: The Dynamite MACH 427? Pro's/Con's


ORIGINAL: FISH KILLA

Is there a price dif between the orange and teal heads variants?

No they are the same price.
On a truggy I would say use the orange head for better fuel economy, and it still makes nice power, for a MT I would say use the Teal head for more power

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