38 TG Cigarette

[BDMar]

Here is the latest project we just finished. Twin 605 CI BBC engines for this 38 Top Gun Cig. We lost a ton of progress pics taken throughout the project. Bad memory card I guess.
These were originally Zul 750's. At about 350 hours they started using oil so it was time to freshen them up. These engines are run very hard all the time so every part was inspected and replaced if needed. Some changes were made to increase performance also. The blocks, rods, head castings, and intake manifolds were all that was re-used.
Some of these pics were from before the rebuild, but I want to include them so you can get an idea of the finished product.
I will include more info later as I have to run.
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4933

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4937

[Mondorally]

Nice! Can't wait to see more pics.

[RiverDave]

What's the estimated HP? Or did you Dyno them?

RD

[BDMar]

What's the estimated HP? Or did you Dyno them?

RD

Lets see..... Sandbar HP is around 1200 :D

We never dyno brand new engines unless the customer insists. I just don't believe in flogging a brand new engine. I am a BIG believer of breaking in engines properly.
Using a dyno has lots of advantages like comparing one camshaft to another. However just for bragging rights dyno readings are not consistant from one to another. Depending on the type of dyno, the HP readings can vary from one operator to another.
These are 91 octane engines with a fairly conservative camshaft profile to allow for shifting at 850 rpm's. My guess would be around 800.
Some of the changes we made were distance between the piston ring grooves, dish design, quench, lifter design, exhaust port and combustion chamber, carburetors, rocker geometry, cam profile & intake center line, etc.
We are still breaking them in, but at this point they are definitely more responsive.

[Sun burners]

So what way should you break in a rebuilt engine?
Is there a difference for a stock Mercruiser?
Whats the average life out of high HP engine?
Thanks Mike

[BDMar]

So what way should you break in a rebuilt engine?
Is there a difference for a stock Mercruiser?
Whats the average life out of high HP engine?
Thanks Mike

There is no break-in rule that applies to all engines. It depends on the horsepower, bearing clearances, piston to wall clearance, ring type, induction type, etc. We set up clearances different on each engine depending on the use and horsepower. Generally speaking we like to see 10 hours for a break-in.
Average life depends on how hard it is run, HP, normally aspirated or supercharged, how well it is maintained, etc. For a normally aspirated 600 CI BBC... maintained properly, run fairly hard, 300 to 400 hours is realistic. Maintenance on an engine like this includes replacing the roller lifters and valve springs once during this life cycle. Also, run fairly hard, means 4500 to 6000 all of the time.

[BDMar]

Here's a few more pics
Proof that we work fast!!:D
5918
This is an Imco lower that we have modified to allow better trim response.
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[SHEP]

Nice work Brian......tell Dane to hit the gym already. :D:joke


DMB

[BDMar]

Nice work Brian......tell Dane to hit the gym already. :D:joke


DMB

Thanks Matt..... no kidding!! He's putting on muscle!!

[River Lynchmob]

Nice looking boat and engines.

Can't a dyno be used to properly break in an engine?

[BDMar]

Nice looking boat and engines.

Can't a dyno be used to properly break in an engine?

Yes... however fully breaking in an engine to a point where I feel it should be flogged on a dyno takes many hours of break-in (how many depends on the engine). It is debatable how many hours and oil changes before it should be dyno'd. I have learned that as a general rule the longer the break-in, the longer the service life no matter what HP.
The cost of operating an engine for 10 or 20 hours on a dyno with 3 or 4 oil changes is cost prohibitive for most people. Combine the running time with allowing the engine to cool and simulating rpm and load changes it would be very costly. I don't know of any dyno operators that are going to want to tie up their dyno for 4 or 5 days either.
Just my method, I know there are lots of thoughts on this.
Tell Jack I said hello:D

[River Lynchmob]

Yes... however fully breaking in an engine to a point where I feel it should be flogged on a dyno takes many hours of break-in (how many depends on the engine). It is debatable how many hours and oil changes before it should be dyno'd. I have learned that as a general rule the longer the break-in, the longer the service life no matter what HP.
The cost of operating an engine for 10 or 20 hours on a dyno with 3 or 4 oil changes is cost prohibitive for most people. Combine the running time with allowing the engine to cool and simulating rpm and load changes it would be very costly. I don't know of any dyno operators that are going to want to tie up their dyno for 4 or 5 days either.
Just my method, I know there are lots of thoughts on this.
Tell Jack I said hello:D

I like to read/hear people's philosophies on different subjects when it comes to boating. You build a very good product and have a stellar reputation in the industry so it looks like it's working very well for you. :beer

I will tell him hi from you.

[BDMar]

I like to read/hear people's philosophies on different subjects when it comes to boating. You build a very good product and have a stellar reputation in the industry so it looks like it's working very well for you. :beer

I will tell him hi from you.

Thanks!

[BDMar]

http://i175.photobucket.com/albums/w145/bdmarine/Kevin-2small.jpg

[SHEP]

So the driver takes the helmet and leaves the chick with the visor? Seems fair. :D

Boat looks good running though.

SHEP

[BDMar]

So the driver takes the helmet and leaves the chick with the visor? Seems fair. :D

Boat looks good running though.

SHEP

hahaha Actually it's an orange hat on backwards.

A little FYI on this boat. The owner and I split the driving duties in the Rum Run POPRA race in the P1 class and finished 2nd. Went around 84 miles in just under 55 minutes. It was a 79 mile race but we had a little issue with navigation:smackhead:D

[Outdrive1]

Is that Out Of Control? Looks similar to Rice Hauler.

[SHEP]

hahaha Actually it's an orange hat on backwards.

A little FYI on this boat. The owner and I split the driving duties in the Rum Run POPRA race in the P1 class and finished 2nd. Went around 84 miles in just under 55 minutes. It was a 79 mile race but we had a little issue with navigation:smackhead:D

Impressive. :thumbsup Makes sense on the hat, didn't realize his head was turned. :smackhead

Hopefully you weren't the one giving directions.

SHEP

[BDMar]

Impressive. :thumbsup Makes sense on the hat, didn't realize his head was turned. :smackhead

Hopefully you weren't the one giving directions.

SHEP

No, I was driving at the time. I get to blame him for our detour...:D:D

[steamin rice]

hahaha Actually it's an orange hat on backwards.

A little FYI on this boat. The owner and I split the driving duties in the Rum Run POPRA race in the P1 class and finished 2nd. Went around 84 miles in just under 55 minutes. It was a 79 mile race but we had a little issue with navigation:smackhead:D

Out of all the cig bros, I thought that Kevin would have had his GPS dialed in.... Congrats on the race. :D

[BDMar]

Out of all the cig bros, I thought that Kevin would have had his GPS dialed in.... Congrats on the race. :D

It was dialed in..... you just have to look at it!!:D

[steamin rice]

It was dialed in..... you just have to look at it!!:D

Yes, that usually helps... :thumbsup:D:beer