Hyper MACH 28 TEMP ?

Hyper MACH 28 TEMP ?
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Hyper MACH 28 TEMP ? - 7/9/2006 1:18:24 PM

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I have just acquired the Hyper Mach 28 in My Hyper 7.
The engine packs plenty of punch, however from the beginning I am puzzled by the running temps, it seems to like it running hot.
On a "good tune" with plenty of smoke low end and visible top end the temp hovers around 365F (185C) but pass the spit test (it just slowly boils away, but this thing has large heatsink), if I richen the HSN and run at 311F (155C, still relatively hot) then top end is too rich/ will not reach peak RPM.

Could anyone owning the MACH 28 share their experience and advice on this engine? Cheers.

RE: Hyper MACH 28 TEMP ? - 7/9/2006 10:12:18 PM

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if it slowly boils away then that means its cool, maybe your temp gun is busted because at 355 its gunna sizzle

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RE: Hyper MACH 28 TEMP ? - 7/10/2006 2:38:07 AM

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Never tune to any specific temperature

Always tune to sound and performance, never exhaust or temps

Ryan

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RE: Hyper MACH 28 TEMP ? - 7/10/2006 10:55:14 AM

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Thanks for your input guys.
I'm running the Venom Smart Temp on board, and have checked with another temp gun which varied just by a few degrees.

The engine appears to be in good tune at 170-180C with visible smoke at any rev range but I'm concerned that the temp might shorten the engine life drastically.
I think Ofna recommends running at 127C/ 260F.

I might pull apart the engine to bits and look for any possible anomaly/ leaks, etc. Nothing obvious from the outside though.

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RE: Hyper MACH 28 TEMP ? - 7/10/2006 2:50:38 PM

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These engines have a design fit that can withstand temps well in to the 400'sF. A hot running engine will not shorten the life span. Also if water slowly boils away, there is no way it is running higher than 125C.

Ryan

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RE: Hyper MACH 28 TEMP ? - 7/10/2006 9:07:30 PM

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I've not really seen a cool running Hyper 28, they all seem to run at the heat of the sun.

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RE: Hyper MACH 28 TEMP ? - 3/24/2007 9:58:29 PM

Jeep

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My mach 28 runs around 290-310 and literally will barely perform below 260 or so from being too rich.
I've run about 3 gallons through it and it's still in great shape.

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RE: Hyper MACH 28 TEMP ? - 3/25/2007 12:21:01 AM

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quote:

ORIGINAL: ryan_t888

These engines have a design fit that can withstand temps well in to the 400'sF. A hot running engine will not shorten the life span. Also if water slowly boils away, there is no way it is running higher than 125C.

Ryan

I had a Force 26 and I ran it at 300-325F and it was running rich as I could get it, but I got 2 - 2.5 gallons out of mine. When I replaced the force 26 it was so worn out I could only get one run and that was it. I would have to let it cool for about 30 - 45 mins. untle it would even start. So yes running the engine hot (over 300) will shorten engine life.
My Dad has the same force 26 I did and his ran cooler 250 - 275F and he has about 3 - 3.5 gallons and still going.

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RE: Hyper MACH 28 TEMP ? - 3/25/2007 3:51:26 AM

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When these engines start to overheat, the cylinder expands more than the piston, reducing resistance. As they reach the point of "overheating," they stall as there is not enough compression. When the cylinder cools compression is re-gained allowing the engine to start.

I have experienced the exact opposite of what you just said except with boat and plane engines.

Ryan

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RE: Hyper MACH 28 TEMP ? - 3/27/2007 3:21:30 AM

dittch

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Think about why most engines overheat. It's because they're running too lean. Too lean means insufficient lubrication. Insufficient lubrication means premature wear and a blown motor in the worst case. Simply put, overheating most certainly causes excessive wear.

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RE: Hyper MACH 28 TEMP ? - 3/27/2007 4:39:03 AM

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Bigger block engines retain more heat. Always tune to reponsiveness and performance. Best way is to listen to the engine throttle and idle

Usually a lean engine would shut down unexpectedly like ryan88 said and have a hard time restarting it and have to wait a while for it to cool back down to restore compression. An overheated engine will lose power while throttling, im sure youll know by experience at how much power it should be pulling it out when using the throttle trigger

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RE: Hyper MACH 28 TEMP ? - 3/27/2007 2:43:57 PM

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quote:

ORIGINAL: dittch

Think about why most engines overheat. It's because they're running too lean. Too lean means insufficient lubrication. Insufficient lubrication means premature wear and a blown motor in the worst case. Simply put, overheating most certainly causes excessive wear.

Did you read the thread at all?

Ryan

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RE: Hyper MACH 28 TEMP ? - 3/27/2007 3:04:16 PM

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Everything that I have read and experienced tells me that running 'hot' does not damage an engine. The difference in metal expansion from 270F to 320F is pretty darn small. The REAL engine killer, as has been explained, is running lean. One cannot determine how lean or rich an engine is simply by taking its temperature. There are way too many factors involved.

For instance, if one changes to a carbon fiber chassis from aluminum, you may find your engine running hotter as the chassis usually works as a heat sink. Changing over to carbon fiber eliminates one source of heat dispertion, and could cause a motor to run hotter. Not leaner, just hotter.

I usually only use my temp gun for break-ins.

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RE: Hyper MACH 28 TEMP ? - 10/14/2007 5:20:15 PM

rocky3

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what is a good amount of turns for the highspeed needle because im getting fruststrated since it keeps stalling?.i cant even go full throttle without it sstalling.really need help please.

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RE: Hyper MACH 28 TEMP ? - 10/14/2007 6:19:35 PM

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Ok,tell me what's happening,just got back from running in my HyperTQ.28.
Initial settings are very rich,i wound the high speed needle in 1/4 of a turn(still rich)go slow on throttle as if you blam it open it will bog and die.Do not touch the other needles for now,first run up and down i left the glow stick on.
I presume you're at the run in stage?My high speed needle is 0.6mm below the outer collar and that is still slightly rich(after ten tanks)

< Message edited by Anthoop -- 10/14/2007 6:20:43 PM >

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RE: Hyper MACH 28 TEMP ? - 10/14/2007 6:48:14 PM

rocky3

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thanks for replying anthoop really appreciate it.ok i have my highspeed nedle set to rich(4 turns)and i havent touched the low speed needle yet.i accelerate slowly and it dies.it does the same thing when gas it full throttle.tell me how i can set it to where it wont die when you gas it full throttle.thanks for the help.

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RE: Hyper MACH 28 TEMP ? - 10/14/2007 8:02:55 PM

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If you've not yet ran the motor in you should not be applying full throttle.
Honestly it was very hard for me to pull away without stalling as the mixture was pretty rich,just....slowly edge the throttle untill you move off then your ok,seems the clutch has a pretty high bite point but once your moving it's fine.
Didn't count the turns from closed but as i said the hsn is 0.6 down from the outer ring after ten tanks and that is still rich(motor still pretty tight too)
Do not be frightened to leave the glow stick on(worst that'll happen:flat batt/duff plug)
Oh also advance your throttle trim a bit too to give a high idle.
Oh and watch the pullstart too,broke my spring today and sat for an hour in a field fixing it

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