MACDAD260

Good numbers, Mike.

Sounds like a 454 Mag with a few more cubic inches. Seems like a large increase over a stock 365hp 454 Mag Carb engine with just a cam change and headers. Interesting.

I hope it warms up soon. I want to get mine out this coming weekend if at all possible. I re-torqued the heads on the 502 this past weekend so I am ready to get it wet now. Where is that 85 degree weather when we need it?

Andree

Where I can get such a Desk Top Dyno and how much is it? Which Company produce such Programms

Zanie

Hey Mike,
Is your cam:
Federal Mugal CS1139R?
If so my engines in my 1984 Excalibur 31' are nearly identical to yours
only difference is I have worked oval port heads opened up for the 2.19 I 1.88 E valves.
Mine is .030 over 8.75:1 CR
Cast cranks 3/8 rods
They spin my 25 mirages at 5000 to 5100 with Q-jets!
70 mph GPS!
They make excellent power.

Enjoy yourself.

DS

Audiofn

Mike get that thing done bro. Time is a waistin and you only have some limited test time to find a prop and all that good stuff.

Crazy how is the knee by the way?

Jon

Waterfoul

The short block is pretty much together. I just got done with the second coat of paint on the intake manifold. Engine will make noise on Saturday!!!! If not sooner!! Then in the boat next week, and water testing soon after. For LOTO, I may not have the exact prop I need, but I will be faster than I am now!!!!

Got to Crazy's tonight and found out one of the rods was on backwards. The machine shop guy fixed it within an hour or so, but this is the second such mistake he made on my stuff. Bores were too small last week, which he also fixed while I waited/helped (the next day). As far as customer service goes, I like this guy, but for getting it done right, the first time.....I'll probably look elswhere next time. He's a nice guy, a great guy even, but two relatively simple, unavoidable mistakes, the first of which cost me two days of assembly time is unacceptable to me.

Need to get the boat home so I can re-wire the batteries, stereo, and paint the bilge!!!!!

Griff

Foul, those #'s sound good----almost too good. What you're doing is almost the same as I did to my engine. I thought I was probably around 425 hp. I wonder how much the .060 overbore is adding. Mine is a stock bore. My cam is 226/236 with a .534/.553 on a 112. Same heads milled .020 with no porting and 8.9 static CR. Same intake with a 1" open spacer and Holley 800. With this, I picked up about 350rpms. I'm spinning a little high though with the 23 Mirage+ at 5400 rpms and could probably spin a 25 pretty well. Can't wait to see the dyno #'s. I was basing my HP estimate on the fact that my engine was pretty close in specs to the older Merc 420's.

Crazyhorse

Audiofn, the knee is coming along really well, but it's really uncomforatable too. I can stand up for about two hours at a stretch before it starts to swell up and cause me grief. We plan on having Waterfoul's engine running for the cam breakin this Sat.
Andree, ProMotion in Brea, CA offers Desktop Dyno. KAAMA just bought their latest version, 59 bucks delivered to your door. They have a website, www.motionsoftware.com or their phone # is 714-255-2931.

253

Waterfoul, I just reworked my engine to almost the same spec's as yours,glad to see the dyno numbers,used same heads and cam,used 1.8 roller rocker on intake side,brings it to .558 w/[email protected],milled the heads .020,fired it tuesday,sounds great,I was hoping for 400 HP,hope to run this sunday,let us know how yours runs.

Katdrvr

The desktop dyno is really cool. The key to good numbers out of the software is good flow numbers on the heads. If you know your flow numbers you will get better results than just using one of the provided cyl. head choices.

mike

Crazyhorse

Yes, I agree. If you don't have the actual flow numbers you need to be conservative with the cylinder head selection for your particular application. KAAMA's been spending a lot of time with his DT and the flow numbers JimV provided him with for his 540 engines.