- Location
- Hamilton,
If your running 7s and not having detonation or pre ignition with your current compression/timing/octane why bother go to the 9?
Spark plugs in watercraft
- Thread starter tntsuperjet
- Start date
If your running 7s and not having detonation or pre ignition with your current compression/timing/octane why bother go to the 9?
I thought people were saying that the EYA ones were a better plug, but I didn't know if it was ok to go to a 9 heat range.
Should I just stick with the BR7ES?
Thanks
Yami-Rider
TigerCraft FV-PRO
- Location
- Texoma
9 is colder, so your be fine. Won't hurt your motor.
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Quinc
Buy a Superjet
- Location
- California
Contact TPE and ask them what they recommend.
Short freestyle skis spend most of the time at part throttle and below the pipes resonant rpm. This area has very cold combustion temps. B-ES plugs never get up to temp in this apication. Plugs with protruded electrodes will stay cleaner. The old standard plug is fine as long as you are not having fouling problems. If you are then find a hotter plug.
cookn
Kamikaze
- Location
- where you live
I feel like this turned into a what oil should we be running thread
OCD Solutions
Original, Clean and Dependable Solutions
- Location
- Rentz, GA
Yeah, more like, "will I benefit from running premium fuel in my bone stock low compression automobile".
I find the information interesting but it's more "food for thought" than "everyone run out and change what you've been doing for years already".
It's also only relevant to those running compression above 200lbs so that stock 650 question earlier made me chuckle a bit.
What I took away from Tim's post;
If you run higher compression (200+), and keep fouling plugs or have ignition issues at higher RPM's, pick up a set and give them a try. Everyone else, keep doing what you've been doing since the first jet ski was invented.
IMO, The most important piece of information was actually about the gap rather than the specific plug. I have always advised to adjust the plug gap down to 0.024" but I will tailor my recommendations going forward in regard to compression.
FYI, spark output drops off at higher rpm as a function of the system itself, even with no compression involved. The charge coil output drops to around 130-135PV (peak volts) around 7800 rpm and will struggle to fire even a healthy ignition system if it drops below 125PV.
Gapping down from the factory recommended 0.032" will buy you some forgiveness as system components degrade.
I find the information interesting but it's more "food for thought" than "everyone run out and change what you've been doing for years already".
It's also only relevant to those running compression above 200lbs so that stock 650 question earlier made me chuckle a bit.
What I took away from Tim's post;
If you run higher compression (200+), and keep fouling plugs or have ignition issues at higher RPM's, pick up a set and give them a try. Everyone else, keep doing what you've been doing since the first jet ski was invented.
IMO, The most important piece of information was actually about the gap rather than the specific plug. I have always advised to adjust the plug gap down to 0.024" but I will tailor my recommendations going forward in regard to compression.
FYI, spark output drops off at higher rpm as a function of the system itself, even with no compression involved. The charge coil output drops to around 130-135PV (peak volts) around 7800 rpm and will struggle to fire even a healthy ignition system if it drops below 125PV.
Gapping down from the factory recommended 0.032" will buy you some forgiveness as system components degrade.
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cookn
Kamikaze
- Location
- where you live
I did find out I should probably be changing my sled plugs for this winter because I have fouled plugs in it with the ES but never my ski and my ski runs great so I follow the if its not broken dont fix it rule
DAG
Yes, my balls tickled from that landing
- Location
- Charlotte, NC
Bump,
Has anyone noticed a difference in the past 3 months?
Has anyone noticed a difference in the past 3 months?
Yami-Rider
TigerCraft FV-PRO
- Location
- Texoma
I've been running them, no change, but I had no issues prior to changing lol.
tntsuperjet
Tntperformance-engineering.com
- Location
- Georgetown ca
Wow, blaming a pickup on plugs, that's about as good as blaming blisters on your heels from gloves that where to tight.
Vibration is number one killer of pickups. Most are actually the wires failed internally do to vibration break down.
Was a joke, you really think a guy that runs total loss would think this for real haha.
DAG
Yes, my balls tickled from that landing
- Location
- Charlotte, NC
tntsuperjet
Tntperformance-engineering.com
- Location
- Georgetown ca
That's one of the problems with reading text. Hard to see expressions and easy to get the wrong impression.
tntsuperjet
Tntperformance-engineering.com
- Location
- Georgetown ca
Hope we don't see pics of your Pistons on here in near future.
Why not add that extra 15-20% safety margin before you need it??
Because it's little expensive to add after u need it!
cookn
Kamikaze
- Location
- where you live
After reading your posts in the other thread about the dasa motors I think I will switch my plugs in my ski too. Granted Im only running a 61x/62t combo with 170 psi that have 4 seasons on he same pistons but I learned alot about compression and fuel from what you were saying and I was thinking of bumping compression for next season anyway
tntsuperjet
Tntperformance-engineering.com
- Location
- Georgetown ca
61x is a bit safer then a power valve motor on pump gas.
Yami-Rider
TigerCraft FV-PRO
- Location
- Texoma
I'm surprised anyone took that statement seriously lol.