8.3l Whipple vs. 10-71
#121
Registered
Dan, Like you said, if you checked the plugs after a high speed run cutting the ign. then WOT looks good but according to you the midrange is where you had problems, so good point!
FYI, I installed a carb Hat on my procharged boat and was up on Lake Charlevoix tunning, turned the key off at 3500 cruise speed, pulled a few plugs and almost $hitt myself, but WOT was low 11s on one bank and high 10s on the other. messed with it all weekend (suppose to be a vacation) Ha right.
FYI, I installed a carb Hat on my procharged boat and was up on Lake Charlevoix tunning, turned the key off at 3500 cruise speed, pulled a few plugs and almost $hitt myself, but WOT was low 11s on one bank and high 10s on the other. messed with it all weekend (suppose to be a vacation) Ha right.
#122
Registered
FYI, I installed a carb Hat on my procharged boat and was up on Lake Charlevoix tunning, turned the key off at 3500 cruise speed, pulled a few plugs and almost $hitt myself, but WOT was low 11s on one bank and high 10s on the other. messed with it all weekend (suppose to be a vacation) Ha right.
#123
Registered
#124
Registered
Probably a lot more air went thru those boosters causing much more fuel to come out of them.
The following users liked this post:
MILD THUNDER (03-01-2022)
#125
Geronimo36
Gold Member
I read my plugs after every weekend and they seemed fine .
I mean you guys tell me, obviously I`m not good at reading plugs but I sent pics to people that said this was fine but I could use more timing .. with boostane they all come out yellow so that makes it even worse ...
,
I mean you guys tell me, obviously I`m not good at reading plugs but I sent pics to people that said this was fine but I could use more timing .. with boostane they all come out yellow so that makes it even worse ...
,
#126
Registered
That’s the best advice anybody could ever give you right there. Damm I remember 30 plus years ago that’s all we had for the most part. PLUG READING. I would always be checking the hotter cylinders at cruising rpm’s and wot. We didn’t have all the fancy chit then nor could afford it. It was school of hard knocks. Dan that video is priceless IMO. Don’t feel bad about what you may not have known before rather learn from it and move forward. So many people are clueless when it comes to plug reading/tuning. Like whaaaaat?
The following users liked this post:
Panther (03-02-2022)
#127
Registered
If you think about it… Do you ever hear of anyone talking about the perfect plug burn and timing? Ah hardly ever! It’s always my afr’s or my egt’s. In fact egt’s almost seem to be less and less of a reference. I still have an old ancient egt probe and digital gauge I use to monitor #8 on some blown bbc’s.
I’ve said it here before but will again and on those same engines the egt’s were like melt piston hot but the plugs told me different. Had to lean it way up to get the fire back in the hole so to speak - Resulting in much lower egt’s. Like the video mentioned there all just numbers at the end of the day.
I’ve said it here before but will again and on those same engines the egt’s were like melt piston hot but the plugs told me different. Had to lean it way up to get the fire back in the hole so to speak - Resulting in much lower egt’s. Like the video mentioned there all just numbers at the end of the day.
The following users liked this post:
Panther (03-02-2022)
#128
Registered
So let me say this, O2 readings and AFRs in whatever range you my think is optimum is all great but I learned and was blown away by reading plugs that those #s can hurt . READ THE PLUGS during Dyno testing.!
I'm sure everyone knows this, I just wanted to bring it up again food for thought!
I'm sure everyone knows this, I just wanted to bring it up again food for thought!
There you go!!! Thank you! I missed some earlier post. 👍👍👍.
I’ve still got burn marks from doing in the boat from years ago. 😂
The following users liked this post:
Panther (03-02-2022)
#129
Registered
But what else can we possibly be doing with ALL are SPARE time?
#130
Charter Member #40
Charter Member
Currently have 8.3's (510R's) on Sterling 1100's. Maybe 10 hours on motors since on the dyno. First experience with 8.3's. Previously had 8-71 and 10-71's with 120 rotors. 8.3's run great but at idle (1000) they seem to make a bunch of racket. Belt tension varied between 1/2 " to 1" cold but no change. Backlash in rotor and input seems ok. Maybe I am being too critical? Anyone else have any experience with this?