61-409 old Race Block

[BSL409]

Taking the old 61 409 iron race engine in for sleeve.
I had this engine in the 61 for the final round at the Epping NH Hot Rod Reunion in 2015 the cars best was 9.41 @ 141 Mph with this block
but, the 4.86 were just too much gear and this engine was not able to handle that much RPM and it split number 5 cylinder wall going to rebuild this engine for the 62 Biscayne since that engine has close to 200 runs on it

 

[Tom Kochtanek]

That's great performance out of an "old iron block" .

Inserting the sleeve into a truck block is a bit more effort, you have to trim that area around the eyebrow after you press the sleeve in place. Just a bit of grinding .

Out of curiosity, what was your RPM at the end of the track on that run?

Cheers!

TomK

 

[MRHP]

How often should an engine be freshened up? I have many thousands of street miles and 150+ laps on my motor right now. It seems to be running as good if not better than when it was fresh. Am I on borrowed time? Sorry for the hi jack, but it kind of goes along the same thought.

 

[real61ss]

Got my attention!! The way the header read I thought you were racing a 623 block and I'm thinking somebody's out of their mind. Thanks for posting the pictures

 

[BSL409]

How often should an engine be freshened up? I have many thousands of street miles and 150+ laps on my motor right now. It seems to be running as good if not better than when it was fresh. Am I on borrowed time? Sorry for the hi jack, but it kind of goes along the same thought.

What's 150 Laps NASCAR ? not sure for your engine thou that's your gut feel

 

[BSL409]

That's great performance out of an "old iron block" .

Inserting the sleeve into a truck block is a bit more effort, you have to trim that area around the eyebrow after you press the sleeve in place. Just a bit of grinding .

Out of curiosity, what was your RPM at the end of the track on that run?

Cheers!

TomK

Tom,
This is a car block not a truck block. with the 4.86 gears I was shifting at 7400-7600 and cross the line at 7700ish

 

[MRHP]

Laps=runs, I just didn't know if there was a rule of thumb for a freshen up.

 

[La Hot Rods]

Grumpy said he found some power when he would hone the cylinders after the engine was run in.
You may be past that now.

 

[jdk971]

i have no knowledge of building these engines. but is there really that much hp gain in the 7k rpms? i know if i tried that the whole
engine would be on the track in no bigger parts than a baseball. you guys have some huge hangy down things. jim

 

[Tom Kochtanek]

Thought I saw the bores winking at me ("eyebrows") .

 

[blkblk63ss]

What is the current bore on all cylinder's??? When you sleeve the # 5 cylinder what will you end up with compared to the other's or will you sleeve all????

 

[Dicey58]

i have no knowledge of building these engines. but is there really that much hp gain in the 7k rpms? i know if i tried that the whole
engine would be on the track in no bigger parts than a baseball. you guys have some huge hangy down things. jim

"Hangy down things" LOL!!! You made my night, Jim!!

 

[63 dream'n]

Tom,
This is a car block not a truck block. with the 4.86 gears I was shifting at 7400-7600 and cross the line at 7700ish

Mom spelled forward or backwards,and upside down spells.............WOW!!!!!!!!

 

[Ishiftem]

How often should an engine be freshened up? I have many thousands of street miles and 150+ laps on my motor right now. It seems to be running as good if not better than when it was fresh. Am I on borrowed time? Sorry for the hi jack, but it kind of goes along the same thought.

Cut the filter open and see whats in it. Run a magnetic drain plug (I bet you do) and see whats on it. If that looks good and your lash isn't changing, keep running it. With your engine and the rpm you turn, I wouldn't think of pulling the pan for a good 300 runs plus the street driving. I take mine apart for a freshen freshen and inspection roughly at 150 runs but, I could go much longer based on what I find. I'm just a nervous fellow.
As for what determines how long you can go, there are numerous factors such as:
Quality of parts
What RPM
weight of components
Type of rod material
Valve spring pressure
Compression
Type of rings
Etc.
A pro stock engine will go one weekend. A 10 second bracket car might go 400 runs.

 

[MRHP]

It's been 3-4 years since I even checked the lash. I may run the valves this winter.

 

[BSL409]

Cut the filter open and see whats in it. Run a magnetic drain plug (I bet you do) and see whats on it. If that looks good and your lash isn't changing, keep running it. With your engine and the rpm you turn, I wouldn't think of pulling the pan for a good 300 runs plus the street driving. I take mine apart for a freshen freshen and inspection roughly at 150 runs but, I could go much longer based on what I find. I'm just a nervous fellow.
As for what determines how long you can go, there are numerous factors such as:
Quality of parts
What RPM
weight of components
Type of rod material
Valve spring pressure
Compression
Type of rings
Etc.
A pro stock engine will go one weekend. A 10 second bracket car might go 400 runs.

Yup I mainly don't trust my rods any more other then that the engine runs great!!

 

[Blk61409]

Got my attention!! The way the header read I thought you were racing a 623 block and I'm thinking somebody's out of their mind. Thanks for posting the pictures

Tommy, that was exactly what I thought!! Racing a 623 block!!! Glad to learn otherwise.