Early 400 vs 455 - Page 2 - ClassicOldsmobile.com

Early 400 vs 455

Old October 15th, 2018, 03:56 PM
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Originally Posted by Kennybill View Post
As I recall A's were the best flowing. "If" the heads are the "bottleneck" then a plus of 5% could mean 5hp per every 100hp. Aka, 390 hp engine could turn into a 410 hp engine, hypothetically.
Not necessarily true, even hypothetically. If you have a build where the heads are the choke point then maybe. Otherwise if they're not the choke point then you may not gain much at all.

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Old October 15th, 2018, 04:46 PM
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Originally Posted by cutlassefi View Post
Not necessarily true, even hypothetically. If you have a build where the heads are the choke point then maybe. Otherwise if they're not the choke point then you may not gain much at all.
Bernhard wrote
The question was from the point of view of a mild performance build using headers,camshaft,ignition,and carb tuning to extract every HP from the factory iron head with out porting.
Their are a lot of Olds fans that still like to play with the old iron heads.
The A head should have the ability to out perform the other heads in stock form based on that it flows more air. Of course the engine has to be built to extract the extra flow potential.

Last edited by Bernhard; October 15th, 2018 at 04:55 PM.
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Old October 15th, 2018, 05:24 PM
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Originally Posted by Kennybill View Post
I saw your JMO in the second post but it wasn't in the first post that you commented about "right mind."
Well excuse me I did not think it was a personal attack! I see now why you did. I was not wanting to go on a rant and made two post. Mid Am was no secret if you really dig a little deeper it was posted maybe here on c.o. I know on Rop! After all the crashes on ROP maybe you never seen it! Mid am is gone thank god.
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Old October 16th, 2018, 07:25 AM
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I am considering using my G heads on that what do I tell the machine shop thats doing the work, local engine guy that does good work but not a real olds guru. What do I want to do with them Ie... valve, seats, rocker studs porting any thoughts
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Old October 16th, 2018, 08:58 AM
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Originally Posted by Mcolabella View Post
I am considering using my G heads on that what do I tell the machine shop thats doing the work, local engine guy that does good work but not a real olds guru. What do I want to do with them Ie... valve, seats, rocker studs porting any thoughts
By the time you add up the cost of re-building a set of cast iron heads with new springs, guides, valves, pocket port you could have brand new aluminum heads.
Some say the Edelbrock head is worth 50 hp out of the box.

Last edited by Bernhard; October 16th, 2018 at 09:02 AM.
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Old October 16th, 2018, 09:15 AM
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Originally Posted by Bernhard View Post
By the time you add up the cost of re-building a set of cast iron heads with new springs, guides, valves, pocket port you could have brand new aluminum heads.
Some say the Edelbrock head is worth 50 hp out of the box.
I agree with you Bernhard. To the op you can port your own heads! There is a very good thread on how to do it on this site.
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Old October 16th, 2018, 10:52 AM
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You said that the 330 engine does not run. Have you tried to get it started?
The reason I ask is if its a simple cheep fix you can get your car up and running. Then take your time planing and budgeting for future upgrades.
It could be something as cheep and easy as a timing chain, bad gas, points etc...
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Old October 16th, 2018, 11:40 AM
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Well, something we can all seem to agree on. It just doesn't pay to pour money into iron heads unless there's a reason you need a certain iron heads for matching purposes. Aluminum is way cheaper and more bang for the buck and less weight.
Back in the day, I poured thousands into iron heads.

to wr1970, it's no big deal. I saw the 8 exclamation marks for 3 sentences, that is why commented. In the 1950s I was taught an exclamation mark represents "strong feelings." Jmo.
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Old October 16th, 2018, 02:27 PM
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Engine build combos
https://www.tapatalk.com/groups/real...ds-combos-f12/

The small block is often over looked and responds well to basic engine mods.
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Old October 16th, 2018, 02:33 PM
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Originally Posted by Kennybill View Post
Well, something we can all seem to agree on. It just doesn't pay to pour money into iron heads unless there's a reason you need a certain iron heads for matching purposes. Aluminum is way cheaper and more bang for the buck and less weight.
Back in the day, I poured thousands into iron heads.

to wr1970, it's no big deal. I saw the 8 exclamation marks for 3 sentences, that is why commented. In the 1950s I was taught an exclamation mark represents "strong feelings." Jmo.
I know Iron heads are where the smart money is but I still like fast factory Iron headed cars best. I also invested in paper thin iron heads in my youth.
I'm going to have one very expensive high 11's car LOL
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Old October 17th, 2018, 08:21 AM
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I saw this on ebay and was wondering if anyone has any dealings with olds rocket parts, and thoughts on this set up seems to be a good deal

https://www.ebay.com/itm/OLDSMOBILE-ULTIMATE-TOP-END-KIT-400-425-455-BIG-BLOCK-/142933829678?nav=SEARCH
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Old October 17th, 2018, 09:11 AM
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Originally Posted by Mcolabella View Post
I saw this on ebay and was wondering if anyone has any dealings with olds rocket parts, and thoughts on this set up seems to be a good deal

https://www.ebay.com/itm/OLDSMOBILE-ULTIMATE-TOP-END-KIT-400-425-455-BIG-BLOCK-/142933829678?nav=SEARCH
I maybe wrong but the address is Modello and that one i think is Lynn the crook! Run for the hills if I am correct.
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Old October 17th, 2018, 09:22 AM
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Originally Posted by wr1970 View Post
I maybe wrong but the address is Modello and that one i think is Lynn the crook! Run for the hills if I am correct.
Definitely not mondello, I just spoke to the Gentleman on the phone, sesms he was an builder that worked for Joe himself, and left after Lynn took over.
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Old October 17th, 2018, 09:39 AM
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Not true Junior never worked for or with MY Dad Joe Mondello. Only for Lynn Welfringer period...

Bernard Mondello Racing Enterprises, Corona, California. 951-371-1432
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Old October 17th, 2018, 10:37 AM
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Mcolabella, I just saw you are in B-more. Shoot an email to Frank Trimble [email protected] . He'll fix ya right up. Straight shot down 95 to Beltsville.
Here's my Trimble bullet:
https://www.tapatalk.com/groups/realoldspower/pump-gas-468-t9139.html
1/4 mile math says it's just shy of 500hp at the wheels. I've been [email protected] so far; just need to figure out how to get it off the line and it should be mid 11s.

Last edited by fleming442; October 17th, 2018 at 11:02 AM.
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Old October 17th, 2018, 11:03 AM
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Originally Posted by Bernard Mondello View Post
Not true Junior never worked for or with MY Dad Joe Mondello. Only for Lynn Welfringer period...

Bernard Mondello Racing Enterprises, Corona, California. 951-371-1432
Thank you for setting the record straight. There are still some that believe his Bs. Too bad too.
Thanks
Mark
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Old October 17th, 2018, 11:40 AM
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Originally Posted by cutlassefi View Post

Thank you for setting the record straight. There are still some that believe his Bs. Too bad too.
Thanks
Mark
so I am confused, is Jr bs, or not
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Old October 17th, 2018, 12:10 PM
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Originally Posted by Mcolabella View Post
so I am confused, is Jr bs, or not
Bernard Mondello set you straight. He is telling you JR never worked with Joe Mondello. My .02 JR is a b.s. Er

Last edited by wr1970; October 17th, 2018 at 12:13 PM.
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Old October 17th, 2018, 01:31 PM
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So is the set up he is selling a good deal or not, seems Reasonable, I am not sending my motor just buying parts
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Old October 17th, 2018, 03:20 PM
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I have a 455 for sale.
Still in my car running, can be inspected and pulled in a moments notice.
500 + hp
reasonable offer accepted as I want to build a new Rocket racing block.

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Old October 17th, 2018, 03:40 PM
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Originally Posted by 69455 View Post
I have a 455 for sale.
Still in my car running, can be inspected and pulled in a moments notice.
500 + hp
reasonable offer accepted as I want to build a new Rocket racing block.
Nice, but why sell.
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Old October 17th, 2018, 08:10 PM
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Originally Posted by Mcolabella View Post
So is the set up he is selling a good deal or not, seems Reasonable, I am not sending my motor just buying parts

With the off shore heads most will tell you to buy bare casting and have someone that knows what they are doing build them.
A lot will tell you just buy the Edelbrock heads
Do searches on Classic Olds and real Oldspower this has been covered in the past.
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Old October 18th, 2018, 06:11 AM
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The eBay ad was a "little" vague, imo. Besides talking about the camshaft, very little information. The roller rockers are similar color as Harlen Sharpes but are they?
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Old October 18th, 2018, 06:17 AM
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Originally Posted by Bernhard View Post
With the off shore heads most will tell you to buy bare casting and have someone that knows what they are doing build them.
A lot will tell you just buy the Edelbrock heads
Do searches on Classic Olds and real Oldspower this has been covered in the past.
I take bare Procomps and install better valves, springs, and retainers. Ironically the Procomps have more meat in various areas over the Edelbrocks. Better for porting.
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Old October 18th, 2018, 08:32 AM
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69455-I sent you a PM
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Old October 18th, 2018, 09:03 AM
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Originally Posted by 69455 View Post
I have a 455 for sale.
Still in my car running, can be inspected and pulled in a moments notice.
500 + hp
reasonable offer accepted as I want to build a new Rocket racing block.
Aww
Very nice engine. I want a new RR block too.
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Old October 20th, 2018, 07:37 AM
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Bernard, Joe Mondello's son and Cutlassefi, Mark Remmel both like and use Procomp heads. Problem is, the assembled in China version leaves a lot to be desired, which is what Olds Rocket Parts will be selling. Even with quality parts they come out cheaper than Edelbrock heads and you know it won't stick a valve or burn oil, they will give a long happy life on your motor.
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Old October 20th, 2018, 11:00 AM
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Originally Posted by Bernhard View Post
Would you mind posting pictures of the 400 B 1965 valve train rockers and studs?
I don't want to hijack this thread. Please send me an email and I'll reply with photos to show you what the A head rocker setup looks like.
John
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Old October 21st, 2018, 09:00 AM
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So was wasting time looking around the net, and looking at the Harland Sharp rocker arms for the olds, noticed a few different part numbers and price ranges what are the difference between them
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Old October 21st, 2018, 09:30 AM
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new thread

Originally Posted by Mcolabella View Post
So was wasting time looking around the net, and looking at the Harland Sharp rocker arms for the olds, noticed a few different part numbers and price ranges what are the difference between them
This really deserves its' own thread and not hijack this one.
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Old October 21st, 2018, 10:00 AM
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Originally Posted by oldsmobiledave View Post
This really deserves its' own thread and not hijack this one.
this was my thread that started.
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