engine choices

[noodles]

Not to take anything away from Mac engines, but whats the next best or is it better? I'm going to be running a whiplash 40. Looking for feedback on engine combos.

Thanks Guys

 

[ALLAN YUEN]

Not to take anything away from Mac engines, but whats the next best or is it better? I'm going to be running a whiplash 40. Looking for feedback on engine combos.

Thanks Guys

CMB45 Evo 2/2Purple headed or CMB45 RS Red headed improve 2% power both good great run than CMB45 CAM sometime "tricky" ( good/bad run) depend on different kind of pipe??

 

[FloridaScaleBoater]

Noodles:

Just set up an RC Marine (Phil Thomas) sport 40 with a CMB RS45, it is strong, had to put the MAC 7.5 pipe on it to pull a decent sized prop< the CMB small black piep was too peaky.

Other than some slight flow enhanccements to the back plate, behind the carb (as per Jerry's suggestion) the engine is stock

If you go that way, you must have the crank welded, as it will come apart, and the crank webs will become out of balance, and destroy the engine.

Give Jerry Crowther a call from SaeDucer boats, he has someone do the welding before he sells the engine.

Rick

 

[Ed]

You gotta be kidding me!!! have the crank welded?? If your gonna spend that knid of money on a engine it should come trouble free. I thought these engines were the best they ever made to date. maybe I will hold off on a CMB 45RS and go with something else. Just my opinion.

 

[AndyBrown]

You gotta be kidding me!!! have the crank welded?? If your gonna spend that knid of money on a engine it should come trouble free. I thought these engines were the best they ever made to date. maybe I will hold off on a CMB 45RS and go with something else. Just my opinion.

I agree with that thought Ed!

"MAC USA" and other engines from Andy Brown are in the works.

Below is a copy of the post I wrote in a different thread last night.

LOL Preston...if there were a few reliable, engines that run great out of the box without "issues" there would be lots more nitro boaters. You and I both know many nitro boaters are gone because of the frustration caused by nitro engine "issues". Rossi, Picco, CMB, MAC, K&B, OS MAX, OPS all have had problems. Even Novarossi. Most guys don't run the stock carb along with a few other parts.

Is it really that hard to make a good engine? No! Just takes someone who really cares.

Lets look a CMB for instance. A few guys have been making aftermarket carb arms for them. Why? Because the stock unit breaks. There are dozens of guys who have lost an important race because the CMB carb arm broke at the wrong time.

The stock arm costs about $7. The after market unit cost $10 - $12.

CMB could spend an extra 30 cents per arm and it would probably never break.

Maybe they don't want to make them better so they can sell more parts. I don't know.

I'd rather sell more engines to lots of racers because they simply wore out from winning lots of races, not sell a carb arm that cost someone a National championship that they worked years for.

I may have made $200 in the last year on the profits of spare arm sales. But for that little bit of money, dozens of boaters probably had a bad day....it's just not worth it to me.

I saw the owner of CMB lose a World championship due to a broken piston in his CMB 21. That piston problem had been on-going for some time.

When I started with the MAC 21 I had CMB beef up the piston boss for the 21. That piston problem is history and the little extra piston weight did not hurt the performance of the engine.

Will everthing always be perfect? NO! However, when little things like carb arm problems go on for years and years, it makes you wound if anyone really cares.

K&B worked off the principal that less than half their engines sold would never be put into service because they were sold out of a hobby shop with a Dumas kit that would never be completed.

K&B's are OK, but when my wife raced her Stock K&B 3.5 powered 21 hydro in the mid 1980's using 40% nitro we needed three of them to get her through the season. We bought a Picco the next year for twice the money and it lasted for the complete season, so we save 33% in engines costs. On top of that she didn't get a DNF because of a broken crank in the middle of a heat.

I know boaters who have quit boating because they couldn't stand the high cost, brought on by constantly sticking pistons in CMB 67's 80's and 90's/100's.

Since I started the MAC program with CMB and showed them what had to be done to eliminate the piston sticking problem, it is almost a non-exsistant problem in CMB's now.

Will I get it all perfect. No! But it will be better!

Will others try to copy? Maybe. But they will always be one step behind.

As they say; If you're not the lead dog, the veiw is always the same!

SO! What's coming? And when? Stay tuned. I will release the news soon.

 

[noodles]

When can we expect to get the good news?

 

[FloridaScaleBoater]

Everyones entitled to there apinion,

Didn't run round four in Miami, and still finised 3rd (sport-40II)

finished first Broward race

finished first SpaceCoast race

I don't think there is a perfect race engine, they all need alittle help, this seems like a small fix for a great engine.

Rick