Procharged 292
04-15-2012 | 09:40 AM
#21
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Ok, some of you guys have justified my hesitation on posting about my build. I appreciate the suggestions and wisdom, but at the same time some of us government employees don't have 30 grand to drop on an engine build all at once.
I got these kits at a great price from a close friend who ran them on his 292 for a few years problem free before he sold his ride last year. I also have faith that my shop would not send me down a road that would result in my motors getting trashed. I did present all of those questions prior to obtaining the parts and doing the install (head gaskets, fuel system, exhaust, etc).
I created this thread to share my experience and results to those who have been considering a ProCharger system. I have done my research and read all the pros and cons. At this point I am not interested in comments regarding what I should do to make it "right" or anyone's bad experience with a supercharged motor. Everyone has their own way to skin a cat.
I look forward to posting some numbers for those who are genuinely interested in a possible upgrade to the already awesome 292 or Mercury small block!
I got these kits at a great price from a close friend who ran them on his 292 for a few years problem free before he sold his ride last year. I also have faith that my shop would not send me down a road that would result in my motors getting trashed. I did present all of those questions prior to obtaining the parts and doing the install (head gaskets, fuel system, exhaust, etc).
I created this thread to share my experience and results to those who have been considering a ProCharger system. I have done my research and read all the pros and cons. At this point I am not interested in comments regarding what I should do to make it "right" or anyone's bad experience with a supercharged motor. Everyone has their own way to skin a cat.
I look forward to posting some numbers for those who are genuinely interested in a possible upgrade to the already awesome 292 or Mercury small block!
I read your older thread where you asked about where you should go to install these and between legendary, precision, and Eddie - you ended up at ProTec.
I looked up pro tec marine in orange beach to see wether they had a prop shaft dyno or a superflow type engine dyno as I was curious wether or not they are actually tuning your ECU on a dyno with an O2 sensor installed in your exhaust - or just installing your used parts. (Im guessing the latter)
Does Pro Tec have a website? I found them , but not their site.
Do they have an in house dyno if so is it a prop type or engine?
I have a buddy with a ski boat and a scorpion in it reading this thread along with us waiting to see what happens over time so in a way I have interest in watching this to look out for him.
Not sure what you are referring to with "30K".
Keep us posted on how it all goes.
Uncle Dave
Last edited by Uncle Dave; 04-15-2012 at 10:15 AM.
04-15-2012 | 09:10 PM
#22
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Joined: Jan 2007
Posts: 794
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From: Sweet Home, North Alabama and Orange Beach
Pro tech is just another small shop that caters to the performance crowd. No need for a web site, word of mouth mostly. If he had a web site he would be over run real quick. He is also a great outboard mechanic. Merc certified..
LC
LC
07-17-2012 | 06:54 PM
#24
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Joined: Jun 2010
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From: San Diego, CA
Update:
Shop had to work out some gremlins with my motors before completing the ProCharger setup. Water pressure was lacking so they replaced the through hull passages and plugged some of the high water intake holes on the sides of the lower drives. Decided to beef up the top end with blue printed head gaskets and ARP head bolts. Both motors ended up having 2 fuel injectors that weren't functioning properly. Ran the boat all weekend without the blowers connected and she was humming along both motors spinning 5000 rpm, 74 mph at WOT in the stock configuration.
Water test today went fantastic with the blowers connected and 28p props. 5 guys and 3/4 tank of gas and the boat was hitting the rev limiter at about half throttle.
Shop will test the boat with the labbed 32 bravos later this week. I hope to get some final speed numbers via GPS.
Shop had to work out some gremlins with my motors before completing the ProCharger setup. Water pressure was lacking so they replaced the through hull passages and plugged some of the high water intake holes on the sides of the lower drives. Decided to beef up the top end with blue printed head gaskets and ARP head bolts. Both motors ended up having 2 fuel injectors that weren't functioning properly. Ran the boat all weekend without the blowers connected and she was humming along both motors spinning 5000 rpm, 74 mph at WOT in the stock configuration.
Water test today went fantastic with the blowers connected and 28p props. 5 guys and 3/4 tank of gas and the boat was hitting the rev limiter at about half throttle.
Shop will test the boat with the labbed 32 bravos later this week. I hope to get some final speed numbers via GPS.
Last edited by diverkr; 07-17-2012 at 08:05 PM.
07-31-2012 | 02:47 PM
#28
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From: San Diego, CA
Ran my boat all last weekend and she is running really strong. Mid-range acceleration is awesome even with the labbed 32s. I am still bouncing off the rev limiter at about 2/3 throttle. Topping out just under 80 mph. It seems I may have to make some other adjustments to get over the 80 mph hump (props, gear ratio, rev limiter) according to the Theoretical Speed Formula.
T.S. = Engine RPM / Gear Ratio * Prop Size / 1056
(5000/1.65) x (32/1056) = 91.8 mph
91.8 mph - (10-20% hull efficiency loss) = 73.4 - 82.6 mph
I am wondering how the boat would react to a set of 34p Bravos. I may find a set to test out, but concerned about handling. The 32s have already given me a lot more bow lift.
Precision Marine could raise my rev limiter to 5500 rpm but that raises questions.
I am not familiar with gear ratio but wonder if dropping to 1.50 would be a favorable choice.
Any experience or advice regarding any of these changes is appreciated!
T.S. = Engine RPM / Gear Ratio * Prop Size / 1056
(5000/1.65) x (32/1056) = 91.8 mph
91.8 mph - (10-20% hull efficiency loss) = 73.4 - 82.6 mph
I am wondering how the boat would react to a set of 34p Bravos. I may find a set to test out, but concerned about handling. The 32s have already given me a lot more bow lift.
Precision Marine could raise my rev limiter to 5500 rpm but that raises questions.
I am not familiar with gear ratio but wonder if dropping to 1.50 would be a favorable choice.
Any experience or advice regarding any of these changes is appreciated!
07-31-2012 | 07:09 PM
#29
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Joined: Apr 2005
Posts: 1,442
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From: Washington, MO
I have read the actual pitch of Bravo props is actually a little bit less than advertised. So running the numbers with a 31.5" pitch at 5000 rpm and 79 mph is 13% slip. I see 10-13% slip running wide open with labbed Bravo's, so it looks like you are right there.
My 2006 6.2's run to 5200 rpm before the rev limiter kicks in. This only happens when airborn since my stock 6.2's can only turn my 28" Bravos 5000 rpm!
No other changes except going to 1.5 gear and you should see 87 mph at 5000 rpm, assuming you can turn that rpm after the gear change, and it sounds very possible.
Great to read your 292 is running strong. Do you have hydraulic steering? How is the handling? Someday I hope to be running the speeds you are working towards!
My 2006 6.2's run to 5200 rpm before the rev limiter kicks in. This only happens when airborn since my stock 6.2's can only turn my 28" Bravos 5000 rpm!
No other changes except going to 1.5 gear and you should see 87 mph at 5000 rpm, assuming you can turn that rpm after the gear change, and it sounds very possible.
Great to read your 292 is running strong. Do you have hydraulic steering? How is the handling? Someday I hope to be running the speeds you are working towards!
