Steve Snider

Has anyone had any experience with Biggie Motors or RH Racing? I am looking to repower my Cig with 572 long blocks. The Bulldog 540 components off my old motors will be used. I like what I see in the Biggie Motors OSO classified ad. Looks like good parts and a good price. Ceramic coated aluminum heads with titanium exhaust valves should be a good choice with the rash of exhaust valve problems going around. Has anyone used these guys??

Strip Poker 388

titanium exhaust valves ??? not sure about it in a marine app unless racing

Rob

mrhorsepower1

Steve,
I am a WD for everyone from EFI,Cyl.Heads,camshafts, blocks, ect.ect. We have been in business 47 years building reliable winning performance engines. I can give you competitve prices and components and any machine work you may need . The advice and support comes free with your business. I will get you into the right combination the first time around! Thanks again!

Dean Gellner
Gellner Engineering Marine Power
(216) 398-8500

Strip Poker 388

Dean where are you located?

Whats your opinion of a titanium exhaust valve is a marine engine?

Rob

Steve Snider

I took the motor apart and decided to rebuild it due the good parts in the motor. It is what appears to be a modified Mercruiser Bulldog 540. Block is Mark IV Bowtie talldeck, The Wiseco pistons are 4.440 with floating pins, the crank is 4.375 stroke, rods appear to be Manley H beam. The cam is a Howard roller hydraulic that is marked HR with 360 over 370 and 129999. The Howard Cam company has no record of the cam. It was built before the new owners bought the company. I assume the 360 and 370 X 1.7 rocker ratio gives me my lift of 612/629. The person who sold me the boat seems to think the cam duration is 236 and 244 @.050. I hate to have valves set up without a cam card with required seat pressures so I guess I need to order new cams for both motors too. The motor failed due to the #6 exhaust seat coming loose. Gill exhausts with long risers may have contributed to water reversion causing this also. ??? It scored a couple cylinders and I had the cylinders bored .030 to 4.470. Pistons are ordered from Wiseco (3 weeks out). I have been running big blocks in boats for over 30 years and it is valve train components that seem to cause the failures in most big blocks. I have decided to put Eickert/Dart aluminum heads that are coated for salt water corrosion on both motors. In my mind these aluminum heads will disipate heat better. I flush each motor for 10 minutes after the boat is loaded so the salt water issue with aluminum doesn't bother me. If any of you guys have any info on the above mentioned cam I sure would appreciate some help.

mrhorsepower1

Cleveland,Ohio Rob. Titanium exhaust valves for a marine engine....NO. I have run them in our N/A offshore race engines but would not recomend the for pleasure app.

ROTAX454

You are in Florida. Contact Mesa Balancing for your engine needs. Straight forward information and his engine builds are known to be the same.