pthomas1956

hey guys is byrons 15% nitro 16% oil ok for a irvine 53????

Razor-RCU

My Feedback: (50)

I would run 0-5% Nitro.

Hobbsy

My Feedback: (102)

5% nitro and 18 to 20% lube preferably castor.

downunder

Rumour (well not really rumour because some guys have done evaporation tests on it) has it that Byron mixes by weight and that the actual volume of oil is more like 14%.....

I'd go along with Hobbsy but say 0-5% nitro like Razor .

Fuelman

My Feedback: (6)

I'm with Hobbsy and Downunder on this, except I will say 0 to 10% with a respectable amount of oil.

dant-RCU

My Feedback: (3)

I fly my Irvine .53 on 10% Nitro with 18% oil (volume) - 80/20 Synthetic/Castor mix. Been running over 3 years.

Dan

asmund

We have some Irvine 53`s around here and they are beeing run on 15% nitro and 15-18% synth like all the rest of the engines around here, no problems at all.

jaka

Hi!
Strange... as All Irvines run best with 0-5% nitro.

NM2K

My Feedback: (14)

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Have you ever met folks that do not recognize the frying egg sound of over compression? They swear that their engines run fine on higher nitro fuels. Then they wonder why they go through bearings and crankshafts so quickly. Must be those junk engines that everyone sells. <G>


Ed Cregger

asmund

As I said, no problems at all. I for sure will recognise if an engine detonates or is overcompressed, this are guys that I fly with and their engines run just fine year after year.

I have countless times read in here that ASP`s can`t run high nitro too because they are high compression engines for the Europeean market. For those who have payed attention to the "how to make more reliable and powerful XLS 52" or something like that, I called that myth "busted" for those who whatch Mythbusters,
My XLS runs GREAT on 30% even with both headshims removed and produce 1.88 hk on APC 13-4. I use it for 3-D flying so throttling and ideling is very important, and it is flawless.

NM2K

My Feedback: (14)

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Then something has changed with Sanye produced engines.

The original Sanye engines sold in the US (ASP) by Indy R/C, back in the late eighties and early nineties, did not tolerate more than 5% nitro without protesting. How did they protest? They overheated and died. Deadsticking was the norm for those running 15% or more nitro. This is a FACT and was not an hallucination.

Obviously, if the engines are running fine on higher nitro today, the compression has been substantially reduced. I suspect that the timing has been altered also.


Ed Cregger

asmund

Yes I agree Ed, but there seems to be no universal rule about the nitro tolerance on ASP (I suspect this also applies for other makers too), even though my ASP XLS 52 loves 30%, my ASP XLS 91 will not tolerate more than 15%. Both are from recent production.

NM2K

My Feedback: (14)

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Well, now that you mentioned it, there was some variation even back then. The ASP .46 engines did not seem to much care how much nitro you used. The .91 and the 1.08 (Redhead versions) were very particular. ASP even included a couple of head shims with the engines. I ran my ASP 1.08 on 5% nitro fuel and had no problems with it. Others, using 15% nitro with no headshims, swore up and down that the engine was junk. No matter of explanation could get it through some of their heads that they needed to either back off the nitro, or add the head shims.

I remember Jim Goad's frustration with modelers that did not install the shims, but who used 15% nitro fuel and then complained to him (owner of Indy R/C) about it. It must have been frustrating.


Ed Cregger

asmund

He he I can imagine those stubborn guys trying to force nitro on their engine even when it clearly tells them it doesn`t care too much for nitro[sm=lol.gif]

Anyways, the three Irvine 53`s up here like 15% nitro. They are of the real Irvines from when they were made in UK with real chrome in their sleeves. No one has added any shims to them

jaka

Hi!
But why on earth use 15% nitro when all Irvine engines run as good on just 0-5! Puzzles me?
Modern ASP, Kyosho GX , Magnum and SC engines are equipped with two 0.1mm head shims and as such could be run on anything from 0% nitro to 20% nitro without problem.

asmund

15% nitro is becoming more and more common for everything here in Norway. It is actually kinda hard to get 0-5% fuel from the LHS, they mostly stock 15% for aero use and 30% for cars. I can order it and pay big $ for shipping and handling and it will turn out to be more expensive than to just pick up a case of 15% in the shop. I will not go out of my bare skin, just to run 5% as long as everything I own run better on 15% and the cost will be about the same or lower.