Another Engine Dynoed today.
 

My buddy Joe is a happy guy today. He has a 42 Fountain. When he bought the boat, it had prochargers. M4's. Since day 1, the boat, or should I say engines, pretty much sucked. Someone had slapped edelbrock heads on them, huge dished pistons, wrong cams, all kinds of issues. The boat never ran right, and he battled trying to make them right. They made good dyno numbers, but they simply werent user friendly. We made some improvements to them, but still, he wasnt enjoying his boat.

With myself, Mike Tkach, Icdedppl, we talked him into going to a roots blower setup. He wants to go boating, and while some may say roots blowers are old technology, dont make as much power, and so on, one thing you cant debate, is they flat out work in marine applications.

So, what we set out to do, was stay with what he had as far as shortblocks. We emphasized the importance of cylinder head technology, cam technology, carb technology, etc, and had a budget to stay within. We worked with RMBUILDER Bob Madara, and came up with a Head and cam combination for this build. In my opinion, the end result, was fantastic. Here is a rundown of the parts of the build.

522ci (4.00 x4.560 bore)
Dart Block
Lunati Signature series Crankshaft
Oliver Connecting rods
Race Tec custom pistons (compression ended up around 8.2:1)
Air Flow Research 315CC full CNC cylinder heads (supplied by Bob)
Morel Hi RPM hyd lifters (supplied by Bob)
.135 Wall pushrods
MLS head gaskets
ARP head studs
Comp pro Steel rockers
stud girdles (supplied by Bob)
Littlefield 10-71 Supercharger
Blower Shop intercoolers
Quick Fuel 1050 Carbs (4150 Style).

With the help of Bob M, and Mike Tkach's excellent assembling skills, the engine didnt skip a beat. We could have exceeded 1000HP with a glory pull by leaning her down a bit, but decided to leave it as is. The engine idles very well at 900RPM and is very responsive. At max RPM, intake air temps were 110 degrees on this pull. Carbs, were almost right on out of the box from quickfuel. We went down 2 jet sizes and that was it. No air bleed changes, nothing like that. The HP was nice, but what impressed me was the torque this little 522 made. Good stuff guys.

That thing is making some jam!

Great numbers, and looks like it was still pulling when you shut it down.

Wow!

AF ratio is pretty much a constant!

Cool stuff.

When you mentioned budget I imagined totally different hardware. He must have had a decent budget because that is all good stuff ! I know, Bob is very reasonable with prices, and you guys probably knew where good deals where the other things. So maybe that's where the 'budget' term came in ? LOL.

Hope others are paying attention to the parts used (I'm not undermining the builder(s) on this statement) as these are all good parts for a performance marine build. Very good, very strong parts.

Builders/friends/support/owner - You guys done good !

Hope he has lots of fun with it.

Im glad that on this side of the Lake we share our results with fellow boaters so that we all learn and benefit in the end.
I`m very happy for Joe B.


https://www.youtube.com/watch?v=HquzPc2V06s&list=UUbIu9JcqtIlRpJCJr2T7mMQ

Well he had the shortblock parts already. I guess when i meant budget, was what he wanted to spend on the builds. Things like whipples , new longer stroke cranks, efi, werent in his budget. But yes, he does have some nice pieces.

Almost every set of these quick fuel blower carbs work nicely. Mike tkach can attest to them on several builds . I really like them for the money.

That dyno sheet has all the right numbers, motor sounds awesome congrats :drink:

Prior pull, with about 6psi, did 872hp. 8psi was 930ish

Starting early this year!!!!


Or late from last year....