Carpe Diem take 2
08-10-2014 | 06:40 PM
#1
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Joined: Jun 2009
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From: Chicago
Carpe Diem take 2
First winter I had the boat I put on 2" spacers in hopes of avoiding the 5000rpm burnout to get on plane .. long story short , spacers never really helped, planing is ALL in the cupping of the props and prop rotation.
This weekend I finally got rid of the spacers in hopes of more speed and rpm (could only turn 5300rpm) I also wanted to make sure AFRs were good to go.
At the same time swapped lowers to turn the props IN.
So left the family at home and with 2 new 02`s , the Mild Thunder man and his notebook , a box of jets, and the Go Pro we headed to the river.
Results were good,
Very Humid air and 80*
AFRs low 11`s to high 10`s
Gets up on plane at 3200 no problem
Acceleration even at 5000rpm is pretty sweet! No more enemic turd
Intake temps under the blower 140-150* (no intercooler )
6psi @ WOT
4% underdriven
100 gallons of fuel
Speed improved by 4-5 mph (84ish) on dead flat water.
Almost 6000rpm on port 5800ish starboard.
Second year with boat I`m pretty happy with that , on the lake with some chop she should scoot pretty good.
https://www.youtube.com/watch?v=U3zQvghTrf0&feature=youtu.be
This weekend I finally got rid of the spacers in hopes of more speed and rpm (could only turn 5300rpm) I also wanted to make sure AFRs were good to go.
At the same time swapped lowers to turn the props IN.
So left the family at home and with 2 new 02`s , the Mild Thunder man and his notebook , a box of jets, and the Go Pro we headed to the river.
Results were good,
Very Humid air and 80*
AFRs low 11`s to high 10`s
Gets up on plane at 3200 no problem
Acceleration even at 5000rpm is pretty sweet! No more enemic turd
Intake temps under the blower 140-150* (no intercooler )
6psi @ WOT
4% underdriven
100 gallons of fuel
Speed improved by 4-5 mph (84ish) on dead flat water.
Almost 6000rpm on port 5800ish starboard.
Second year with boat I`m pretty happy with that , on the lake with some chop she should scoot pretty good.
https://www.youtube.com/watch?v=U3zQvghTrf0&feature=youtu.be
Last edited by ICDEDPPL; 08-10-2014 at 06:48 PM.
08-10-2014 | 07:41 PM
#6
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Joined: Jul 2004
Posts: 11,332
Likes: 73
From: chicago
A little data
3000RPM = 12.0 AFR. 1" vacuum. 48mph Intake air temp 140*
3500RPM= 12.0 AFR 1psi boost. 52mph 130* intake air temp
4000RPM= 11.8 AFR 2psi boost. 62MPH 130* intake air temp
4500RPM = 11.5 AFR 4psi boost 69mph 135* intake air temp
5000RPM = 10.9 AFR 6psi boost 76mph 135* intake air temp.
WOT = blew pen out of my hand.
I dont have to tell you cig guys, this boat needs chop. Temp today was about 83*, but humidity was around 80% on down along that river corridor. Should wake up a bit on the big lake with better air and some chop to get that old hull loose.
IMO, with air intake temps about 50* hotter than ambient at full tilt, I question the gains an intercooler would offer on this low boost setup.
3000RPM = 12.0 AFR. 1" vacuum. 48mph Intake air temp 140*
3500RPM= 12.0 AFR 1psi boost. 52mph 130* intake air temp
4000RPM= 11.8 AFR 2psi boost. 62MPH 130* intake air temp
4500RPM = 11.5 AFR 4psi boost 69mph 135* intake air temp
5000RPM = 10.9 AFR 6psi boost 76mph 135* intake air temp.
WOT = blew pen out of my hand.
I dont have to tell you cig guys, this boat needs chop. Temp today was about 83*, but humidity was around 80% on down along that river corridor. Should wake up a bit on the big lake with better air and some chop to get that old hull loose.
IMO, with air intake temps about 50* hotter than ambient at full tilt, I question the gains an intercooler would offer on this low boost setup.
08-11-2014 | 08:29 AM
#10
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Joined: Jun 2009
Posts: 9,971
Likes: 6,465
From: Chicago
