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Old May 15, 2018 | 07:21 AM
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330 questions

i am new to this site and hope to get some good information for my engine build.

this is where I am at with my 330.
Block .30 bore
line bored
901-16 Comp Cam
forged stick crank
honed pin ends and drilled holes to float
new Mondello 4057 Bore Pistons - Flat top
mondello rings
high output oil pump - mondellos
Old May 15, 2018 | 07:30 AM
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springs to match the cam
new exhaust and intake valves
steel retainers
surface heads
new hydraulic lifters
pioneer performance valve stem seals
valve guides
locs
VSI shims
SBI brinze guides
multi angle valve job
Edelbrock 7111 intake
dual exhaust
edelbrock 750 carb

whew. I have been working on engine for years. The question now is hopefully easy for many of you. Have I built something that will give me some additional horsepower?

2100 stall converter to 300TH

i am thinking of a single turbo option that is put out by TorqStorm.

Any my suggestions would be helpful - except ones to get a 455 etc.. I already have a ton in this build.

thanks
mark from Atlanta area
Old May 15, 2018 | 08:56 AM
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Flat top pistons will likely result in way, way too high compression for using a turbocharger. I think you'll have enough power as it is.

FYI, "901-16 Comp Cam" are valve springs, not a camshaft. What cam do you have?
Old May 15, 2018 | 09:27 AM
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Cam number

Sorry about cam mix up. I was looking at all the cardboard cutouts from the parts I purchased.

the cam is a Competition Cam Camshaft. I did ask the machinist to put a “mild hotter” cam. Can find that number right now.

How many HP you think I could have added?
Old May 15, 2018 | 09:28 AM
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What is BobCard

Can anyone explain a Bobweight Card to me. I have all this great information and numbers but no idea what to make of it.

thanks
Old May 15, 2018 | 09:54 AM
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Originally Posted by 66oldz
the cam is a Competition Cam Camshaft. I did ask the machinist to put a “mild hotter” cam. Can find that number right now.

How many HP you think I could have added?
Well, with no idea about the cam specs, how it's installed, or how/if the engine is tuned, you could be anywhere from actually losing horsepower to adding some.
Old May 15, 2018 | 09:58 AM
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Not Good

That would going in the wrong direction. I did go with the MSD complete ignition system. The only part of this build in question is the cam and the tuning.

it also had a balance from damper to flex plate.

as you can tell I am learning. I have been wrk on and building engines since I was a kid but never invested in a build like this one.
Old May 15, 2018 | 11:03 AM
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455 Better

Would I be better off rebuilding a 455, keeping it pretty much stock, and mounting the supercharger to that? Here is the brand supercharger TorqStorm Superchargers.
Old May 15, 2018 | 11:45 AM
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Wrong Cam

seems as though I might have installed the wrong cam to achieve more hp. It is the Comp Cams #42-227-4
Old May 15, 2018 | 12:29 PM
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That cam is a bit larger than the factory cam, so you are headed in the right direction.

http://www.compcams.com/Company/CC/c...csid=1161&sb=2

.433" lift, 252 advertised duration, 206ş duration @ .050" Lift

You could definitely go larger with the compression ratio those flat top pistons give, but it all depends upon what you are wanting from the engine. You keep mentioning forced induction so I get the feeling you want a LOT of power, but it seems as if you didn't build the engine to be compatible with forced induction.
Old May 15, 2018 | 12:38 PM
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Thought So

i was afraid that I did not build a good platform for a super HP car. I know that I have several thousand in engine and tranny.

i wonder if I can go back and make amends seeing I am pulling the engine apart now to put in new rings. There new but it did not have a good break in experience. This engine was built 9 years ago.

what I want is an engine that fits under the hood (lol) has a lot of HP but my wife and I can take it on day trips and car shows.

the car is a body off restoration of a 1966 Olds Cutlass. I am doing a clone 442 - down to the trunk trim (almost impossible to find) the correct placement of badging and interior.

the only way to tell to to see the 330 engine instead of a 400.
Old May 15, 2018 | 12:40 PM
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371

I do have a friend that is offering me a 371 with tri-power J2. Seems like there are a lot on sale though.

thanknyou for help as I sort through making the right move with my baby - the cars name is Marilyn - as in Monroe.
Old May 15, 2018 | 05:39 PM
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If you're taking the engine apart to install new rings, you could do a cam change as well to take advantage of the compression. Check with cutlassefi for cam recommendations - he'll probably be able to set you up with something that will make your 330 happy.
Old May 16, 2018 | 04:47 AM
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Originally Posted by 66oldz
Can anyone explain a Bobweight Card to me. I have all this great information and numbers but no idea what to make of it.
Thanks
The bobweight is the balance weight for each rod throw. It consists of two Rod big ends, two sets of rod bearings, 1 piston, pin, rings and small end of the rod. The reciprocating weight cancels each other out to some degree. What did the card say for weight?

Last edited by cutlassefi; May 16, 2018 at 04:51 AM.
Old May 16, 2018 | 05:24 AM
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Bob Card


Here is Bob Card
Old May 16, 2018 | 05:27 AM
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Pistons

the only information I have as a description of the pistons is as follows:

-4057 Bore Pistons $459.00
-Piston Rings $209.00

tjanks
Old May 16, 2018 | 05:52 AM
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The ST300 is a 2 speed turd. A 2004R and 3.42 or better gearing would go along way. That cam is small, I have a larger cam in my 9 to 1 350.
Old May 16, 2018 | 11:44 AM
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Originally Posted by 66oldz
the only information I have as a description of the pistons is as follows:
4057 Bore Pistons $459.00
-Piston Rings $209.00
tjanks
Without knowing whether or not they’re flat tops or dished, it’s going to be really tough to figure out your compression ratio.
Old May 16, 2018 | 11:46 AM
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flat top

They are for sure flat top
Old May 16, 2018 | 05:15 PM
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Originally Posted by 66oldz
They are for sure flat top
With a dish or a pure flat top?
Old May 16, 2018 | 06:05 PM
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Pure Flat Top

pure flattop
Old May 17, 2018 | 05:30 AM
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Originally Posted by 66oldz
pure flattop
Then you most likely have well over 10:0.1 compression.
Old May 17, 2018 | 07:44 AM
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The next questions is how many head cc's and what thickness head gasket do you have ?
Old May 20, 2018 | 05:52 AM
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I am surprised anyone makes a higher stall for the ST300 2 speed. You could pick up a set of the 6cc dish version of that piston, would have to check weight for balancing. I assume 93 octane, anything else would be a pinging nightmare. With slightly less compression, a cam swap is still a good idea.
Old May 20, 2018 | 07:49 AM
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Originally Posted by olds 307 and 403
I You could pick up a set of the 6cc dish version of that piston, would have to check weight for balancing. With slightly less compression, a cam swap is still a good idea.
Or a set of the new Mahle 10cc pistons in 4.065 bore😉
Old May 20, 2018 | 08:14 AM
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Originally Posted by cutlassefi

Or a set of the new Mahle 10cc pistons in 4.065 bore😉
I agree Mark and a proper hone might not be bad since there was ring sealing issues. Those Mahle pistons are way lighter and have much thinner rings that should seat easier. I figure around 9.5 to 1 with the Mahle pistons. I use this calculator.
https://www.google.ca/url?sa=t&sourc...z4R-7JWFg4GK32
Old May 20, 2018 | 08:19 PM
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Cam

any suggestions on a cam?
Old May 20, 2018 | 08:22 PM
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Cam

Any suggestions on a good cam? Please remember that I plan to attach one of Dick Miller super chargers to the engine when finished.

thanks
Old May 21, 2018 | 04:41 AM
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Originally Posted by 66oldz
Any suggestions on a good cam? Please remember that I plan to attach one of Dick Miller super chargers to the engine when finished.
thanks
Then you need to lower the compression ratio or go with a modern engine management to control detonation.
Cam will need to be something in the 220+@.050 range on a 114lsa with 10-14 degrees of stagger.
Old May 21, 2018 | 05:38 AM
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What Suggested

what modern engine would you suggest and a cam and pistons to go with.

I guess I will be building this engine and tranny based on complete input from this forum. It may start to get a bit crazy.

Are you thinking of an Ls motor? Chevy, Olds, Ford, Hemi... lets get this game started.
Old May 21, 2018 | 05:58 AM
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Mark is talking the Olds V8. Remember, Cutlassefi's own Cutlass is Olds 350 powered with Sequential EFI with a modified Performer RPM to accept 8 injectors.
Old May 21, 2018 | 06:09 AM
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Pics

The Summitt carb is awful to tune.


Old May 21, 2018 | 06:11 AM
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Carb

The summitt carb is the worse I have ever had to try and tune - can’t get it to not burn rich.

i also purchased a new 350 Turbo transmission and took out two speed.
Old May 21, 2018 | 08:24 AM
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Originally Posted by 66oldz
what modern engine would you suggest and a cam and pistons to go with.

I guess I will be building this engine and tranny based on complete input from this forum. It may start to get a bit crazy.
Are you thinking of an Ls motor? Chevy, Olds, Ford, Hemi... lets get this game started.
Not talking about changing engines, I meant an EFI or spark management system for your 330.
With the compression ratio you have, coupled with the stock iron heads, you’ll be detonation prone for sure if you’re not careful.
Old May 21, 2018 | 05:18 PM
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Originally Posted by 66oldz
The summitt carb is the worse I have ever had to try and tune - can’t get it to not burn rich.

i also purchased a new 350 Turbo transmission and took out two speed.
Those Summit carbs are an old Holley design, 600 or 750 cfm?
Old May 22, 2018 | 10:07 AM
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What Does Mean

What would "prone to Detonation" mean as you use it.

I have upgraded the ignition to MSD performance kit.
Old May 22, 2018 | 10:09 AM
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Not quite sure

Originally Posted by OLDSter Ralph
The next questions is how many head cc's and what thickness head gasket do you have ?
i don't know the answer to these questions.
Old May 22, 2018 | 10:55 AM
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Originally Posted by 66oldz
What would "prone to Detonation" mean as you use it.

I have upgraded the ignition to MSD performance kit.
Even with the right tune and minimal boost, you’ll need good fuel and that will have limitations.
Old Mar 7, 2024 | 03:43 AM
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350 to 400

Originally Posted by olds 307 and 403
The ST300 is a 2 speed turd. A 2004R and 3.42 or better gearing would go along way. That cam is small, I have a larger cam in my 9 to 1 350.
i made the decision to go with the origional 400 with large valves m
and 921 lifters. i purchased Edlebrock headas and sprinhs as well as a set of roller rockers. i also went wit a W30 from a speed shop. i am looking for 921 lifters. i only need 4. if anyone has some that would be great.
Old Mar 7, 2024 | 04:21 AM
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The car came with an early Olds 400 motor? Hopefully someone chimes in on .921 lifter availability.



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