ok it dynoed at.... [Archive]

502procharger

08-08-2003, 10:21 PM

ok my 540 dynoed at 945 hp and 923 lbs of torque but that was with dry headders and 10lbs of boost from a procharger. any idea how much hp i will loose with cmi marine exhaust? are these good numbers for a 540 with dart cnc heads and 30 deg of timing and 10lbs of boost. am i pushing this motor to far. the exh. temps topped out at about 1400 deg at full power and boost, is this to high? it has blower pistons and i never run less than 93 in it. should i drop the boost? does it seem ok? any input is great.
[ August 09, 2003, 01:34 PM: Message edited by: 502procharger ]

Craig

08-09-2003, 02:43 PM

Sounds like good numbers :D What the motor going in? I don't thing you'll see much of a loss if any with the CMI's. As long as you used good parts to build the foundation, it'll hold up. Donnie has about 900 horsepower in his Daytona and has almost 200 hours on it!

502procharger

08-09-2003, 04:07 PM

all good parts in the motor from the crank up. it is going in a 25' switzer v bottom, should run well.

Infomaniac

08-09-2003, 04:24 PM

I bet it will haul some serious ass.
How fast the boat goes is the only thing that matters.
[ August 09, 2003, 05:24 PM: Message edited by: Infomaniac ]

502procharger

08-09-2003, 04:40 PM

lets see how the xr drive holds up. it ran 81.2 mph with a procharged pretty much stock 502. it should have been around 550 to 600hp with the procharger. i got the back issue from 91' when powerboat did the test on the boat and it runs 71mph with a stock 502 carb motor when they tested it. fast hull, should be a handful :D :D
[ August 09, 2003, 05:45 PM: Message edited by: 502procharger ]

Dave C

08-10-2003, 12:31 PM

Damn 1400 degrees.. thats hot....
I tried not to let the NOS motor go more than 1350.

UBFJ #454

08-11-2003, 07:05 AM

Cyl temp of 1,300 to 1,400 F is where I'd run it.

boatcrazy

08-11-2003, 03:21 PM

I have 01 26 daytona with a 540 m3 procharger efi pfm chiller,and engine gorrila mgnt.system,with 8 psi.,about 750hp. at 5800 rpm.does your moter have a chiller,that makes a big differnce.I dont think your drive will hold up either.I would back off to 8psi,i think everything will hold up better.

502procharger

08-11-2003, 03:52 PM

i dont know what the diff. is. My motor is a bbc 540 30 over with 8.25:1 comp. m3 procharger with regular procharger 504 intercooler. Dart 335 cc cnc ported alum. heads, nickerson built carb, cust. ground blower cam (hyd roller) roller rockers, 500hp intake, 30 deg. locked msd dist and ignition, inconell exhaust valves, manely pro series rods, billet crank, what else???? it idles at 900 without missing a beet. the last number on the dyno sheet gets cut in 1/2 to figure out boost. check it out and see what i may be missing.
http://www.hotboatpics.com/pics/data/500/1DSC04393.JPG

Badboat1

08-11-2003, 06:37 PM

502,That should set you back in the seat,runs good.Let us know how it runs in the boat.
BB1

502procharger

08-12-2003, 12:22 PM

is that exhaust temp to high?

Badboat1

08-12-2003, 02:43 PM

Just looking at the fuel #'s.Iwould have to say it is lean.ie high egts also.A high egt is caused by one of two things lean or rich and it is not rich looking at the sheet.
BB1

502procharger

08-12-2003, 02:52 PM

randy, should i go up a few sec. jet sizes?

Badboat1

08-12-2003, 04:08 PM

You have a PM 502

skater40

08-12-2003, 05:00 PM

At 10 p.s.i. you need to run a good race gas of at least 1oo octane and a intercooler to bring your egt down.With your current fuel/egt combo you will blow a hole in a piston with a long hard run.If you want it to last-pay for the good gas.

502procharger

08-12-2003, 05:22 PM

I really dont want to run race gas; i am dropping the boost to 8lbs and going to bump the jets up a little. Some of the higher exhaust temp is coming from me keeping the timing at 30 deg. Well i think it is, i was always told the lower the timing the less chance of detonation but the higher the exhaust temp. Anything else you think i need to do to keep it safe with 93. Please advise... how much to go up in jet size ect. oh yeah it already does have a good size intercooler.
[ August 12, 2003, 06:23 PM: Message edited by: 502procharger ]

Infomaniac

08-13-2003, 06:37 AM

These fuel numbers are a bit fat (safe) Still makes plenty of power. http://www.***boat.com/image_center/data/504/211Dyno_Sheet.jpg
[ August 13, 2003, 07:38 AM: Message edited by: Infomaniac ]

skater40

08-13-2003, 07:51 AM

Lowering the boost to 8 and raising the timing to 34 will help. on any long hard runs, i would run at least a 50/50 mix with av-gas to 93 octane.

502procharger

08-13-2003, 03:03 PM

you need to double that fuel/hr number i went back to the dyno place today and looked at some of the other pulls and the "b" fuel meter lead must have fallen off on that last pull. that should make it a little fatter. :p

Dave C

08-15-2003, 09:58 AM

502,
Did you get the Dart Pro 1 CNC alum heads?
If so, I am now convinced and will be placing an order!

502procharger

08-15-2003, 12:55 PM

yes i got the 335 cc cnc ported dart pro 1's i am very happy with these numbers.

Floored

08-15-2003, 05:42 PM

:confused: the pyrometer on my 455 olds jet is always between 900-1400 deg with a tan color on my plugs. I'm just a single carb boat anchor, but its run like this for a couple years and doesnt miss a beat. idea I've never had my meter calibrated so it may be off a little, who knows

BOOSTDADDY

08-20-2003, 08:27 PM

Hey 502,
230lbs of fuel per hour is not enough. It will not supply 900 H.P. This is supported buy the very low B.S.F.C. number of .27
Pounds per hour should be high 400's and B.S.F.C. in the .55 or higher depending on how efficient everything is.
Good Luck!