Former Member Posted February 6, 2019 Share Posted February 6, 2019 [This posting has been removed] Quote Link to comment Share on other sites More sharing options...
Kim Taylor Posted February 6, 2019 Share Posted February 6, 2019 Posted by Jason Channing on 06/02/2019 17:17:05: I love the way things get exaggerated over time. Kart engines have never run at 22k unless the chain snapped,>>>> Yours might not, but ours certainly did. Nowadays, they are rev limited, I believe, but our Vortex, Parilla and CRG 100cc reed valve Formula A motors were not. Depending on the track, they would be geared to max out at anything between 20 and 22k. They were well over their peak power, which was at around 17k, but you had to gear them to pull strongly out of the slower corners without the help of the clutches which they have nowadays. Highest I ever saw was 24k....................when the chain snapped!! KIm (Crew chief for ex Buckmore Park KC vice champion and Super 1 (British Championships) competitor). No Quote Link to comment Share on other sites More sharing options...
Martin McIntosh Posted February 6, 2019 Share Posted February 6, 2019 I have used at least eight year old petrol in model engines with no problem although a mechanic once told me that it only has a shelf life of six weeks. Difficult stuff to chuck away and my current car is diesel anyway. Quote Link to comment Share on other sites More sharing options...
Former Member Posted February 7, 2019 Share Posted February 7, 2019 [This posting has been removed] Quote Link to comment Share on other sites More sharing options...
Kim Taylor Posted February 7, 2019 Share Posted February 7, 2019 We're way off topic so I won't post any more than this on the subject, but you were a bit before our time. Our Parillas were TT42's and were tuned by Piazza somewhere in Europe (sorry to be vague, but I don't retain 'stuff' the way I used to), or for the later heavy crank motors, Bruno Ferrari. They were rotary valve motors, but would run to 19k all day (well, to their 45 minute 'life' anyway). The Vortex and CRG reed valve motors were buzzier and at places like PF or Three Sisters were running to well over 20k (they don't call it conrod straight for nothing). The rods would stretch over time and our builder would replace them when they got to a certain length (obviously only a few thou, but measurable). When the homologation changed to water cooled motors, we got left behind as we couldn't afford to re equip with all new motors and packed it in rather than be un-competitive. Then we started racing cars............................................... Kim p.s. And the petrol still went off after week or so!!! Quote Link to comment Share on other sites More sharing options...
Alex Ferguson 2 Posted February 14, 2019 Share Posted February 14, 2019 I was having problems starting our push mower. I always made sure the petrol was fresh. I then checked for spark and not all that good so replaced the coil. Now if there is something wet in the tank it will go. Amazing difference. Another mower with a Briggs & Stratton engine went quiet the other day. It was possible to spin the blades freely. Hmmm.... It would appear the conrod has broken. Quote Link to comment Share on other sites More sharing options...
Dave Hess Posted February 14, 2019 Share Posted February 14, 2019 I recently recommissioned a motorbike that I hadn't used for 14 years. There was about a gallon of petrol still in the tank. All I did was charge the battery and press the starter. It worked perfectly, though it stank of old petrol. Even the MOT tester commented on the smell. After it passed the MOT, I topped up the tank with fresh petrol and went on a 300 mile tour of Yorkshire. In summary, I'd say that petrol would have to be substantially evaporated before you get any detrimental affect. It can hardly evaporate if it's in an enclosed container like a fuel tank. I don’t think there's even a breather hole in my lawnmower, so even less chance of evaporation. Quote Link to comment Share on other sites More sharing options...
Don Fry Posted February 14, 2019 Share Posted February 14, 2019 Posted by Dave Hess on 14/02/2019 10:43:11: I recently recommissioned a motorbike that I hadn't used for 14 years. There was about a gallon of petrol still in the tank. All I did was charge the battery and press the starter. It worked perfectly, though it stank of old petrol. Even the MOT tester commented on the smell. After it passed the MOT, I topped up the tank with fresh petrol and went on a 300 mile tour of Yorkshire. In summary, I'd say that petrol would have to be substantially evaporated before you get any detrimental affect. It can hardly evaporate if it's in an enclosed container like a fuel tank. I don’t think there's even a breather hole in my lawnmower, so even less chance of evaporation. 14 year one petrol predates ethanol contamination. So it's still at least dry. And it did not contain oil to go off. As I've said before, my outboard manufacturer says, E10 fuel is good for a month. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.