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Upgrading a Batten Headed 455 originally built by Joe Mondello 20+ years ago

Upgrading a Batten Headed 455 originally built by Joe Mondello 20+ years ago

Old January 10th, 2019, 05:26 PM
  #201  
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Thanks for watching our comedy of errors.

We are aiming for 550+hp on a certified Dyno with numbers that really calculate correctly from the BSFC and volumetric efficiency.

Vortecpro is helping us make it happen!

I canít thank him enough for his efforts and guidance!
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Old January 10th, 2019, 10:09 PM
  #202  
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Originally Posted by Battenrunner View Post





Some surprises to come in the next few weeks on the heads.... the slack in the valve guides on one of the intakes was terrible, and there was more than .009 of runout on the seat that Mark measured.... New valve guides and new exhaust seats to come next by VortecPro.

For now, we are making room for the larger intake valves... I turned these exhaust valves tonight after I got home from work.... let me tell you what, Manley severe duty valves are made of some tough alloy, and it does get harder as you increase the temp, believe me!

These 1.71 valves were cut down to be ~1.635 /1.6345 inches...NOW THAT IS WHAT I CALL A MARGIN! Haha

Manley 2.125 Race Flo intake valves are on the way, and from the way the ports look, should work great in these heads!
Looking forward to your next dyno session.
The exhaust vales are old school and look heavy, are newer lighter valves that flow better not in the budget?
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Old January 10th, 2019, 11:08 PM
  #203  
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Haha, yeah they are Manley Severe duty valves, and they look super thick for a few reasons, one, because of the valve head construction was originally designed as a 1.71, and cutting .070 off of them without re-grinding the seat leaves them very thick, two, they are thick, and don't have undercut stems, etc.

I am looking at buying new valves as well if we don't like how these work in the seats and/or how they grind....

Thanks for staying "tuned in"; more tech and pictures of the ported heads and the reason why they weren't flowing well at low lift numbers is coming up soon.

This was such a mix-mash, hodge-podge of a an engine build originally from Mondello, it is really weird.... wait until we show a pic of the valve pockets and the seats....the rule of 86-90% max of the venturi size to valve seat didn't even come close.

We are at a 93% venturi - throat size now with only a 2.055 intake valve- almost no venturi effect = slow moving air at low lift numbers and a lazy port. Moving up to 2.125 intake valve gets us down to a 90% number, which is still high for a street engine but in the range of acceptability.... What is really crazy is that I read an article in Engine Builder magazine (online) that specifically quoted Joe M. saying that you never want to go over 90%..... that makes this even more frustrating.

To get to an 88% number, we need a 2.18 valve, which isn't available in an 11/32 stem, but is available in a 3/8 stem in the correct length.....



We want to see how the 2.125 valve works with the current port once it gets some experimental valve job on the seat, testing for flow... We will see if we need to go to the 2.18 or not.
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Old January 11th, 2019, 06:29 AM
  #204  
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Originally Posted by Bernhard View Post
Looking forward to your next dyno session.
The exhaust vales are old school and look heavy, are newer lighter valves that flow better not in the budget?
As the 45 is ground back into the valve the margin will be back to normal thickness. I will put up pictures as I go.
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Old January 11th, 2019, 11:20 AM
  #205  
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Nice attention to detail on the heads. I’m curious on what you end up with for cam specs if you switch cams. I talked to Bullet cams yesterday afternoon and they spec’d a 292-300 adv duration 240-248 @.050 .611 lift with hot lash of .010 ground on a 110+4 Lsa. This will be a low lash solid roller 461 build. Another question is what are you going to run for header size and mufflers? Thank you
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Old January 11th, 2019, 12:58 PM
  #206  
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Thanks ‘boogie!

That sounds like a healthy roller for a fun combo in yours.

We are juggling the fight between duration, overlap, and very low cylinder pressures related to the very thin air here at 6400ft. As the current cam only showed 115psi of cranking compression, you can imagine how much we have to increase that to get the power numbers up.

Stay tuned, cam info and valve work are both coming up!


Also, we are running 1 7/8 primary tube, 3.5 merge collector American Racing headers, with 12 inch long 3.5 to 3 inch reducer/extensions. We will likely run dual 3 inch Magnaflow straight through mufflers with 3 inch mandrel tubing with a side exit right after the muffler.

Last edited by Battenrunner; January 11th, 2019 at 09:05 PM.
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Old January 11th, 2019, 07:47 PM
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Originally Posted by VORTECPRO View Post
As the 45 is ground back into the valve the margin will be back to normal thickness. I will put up pictures as I go.
Thanks for the reply.
I understand that the valves will look the same as prior to reducing the diameter of the head.
I thought with so many ss valve options like a necked down steam, thin head that flows better than a standard valve with out back cutting, that you might have gone that route.
I look forward to more up dates thanks for sharing your build!

Last edited by Bernhard; January 11th, 2019 at 07:52 PM.
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Old January 11th, 2019, 09:03 PM
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Originally Posted by Bernhard View Post
Thanks for the reply.
I understand that the valves will look the same as prior to reducing the diameter of the head.
I thought with so many ss valve options like a necked down steam, thin head that flows better than a standard valve with out back cutting, that you might have gone that route.
I look forward to more up dates thanks for sharing your build!

We will see how the exhaust port works once we get a new valve seat in there for the smaller valve diameter. The exhaust numbers were really pretty strong on this head already, and the intake was very anemic, so we are really focusing the majority of effort on the intake side. I am really excited to see what happens with the head changes.

Last edited by Battenrunner; January 12th, 2019 at 08:13 AM.
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Old January 13th, 2019, 01:14 AM
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A little change of pace lately, while Vortecpro is waiting on me to bring him parts next week...




We decided to do the rebuild on the Gear Vendors overdrive tonight... we still need the adapter pieces to mate it to a gm 400, but at least it will be ready to go once we round up those parts.

Last edited by Battenrunner; Yesterday at 10:12 PM.
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Old Yesterday, 10:24 PM
  #210  
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So, we got some parts delivered to Vortecpro, and unfortunately, after we checked each of the exhaust valves, two had way too much runout to try to grind. Vortecpro ordered us some new CHE ductile iron valveseats for the exhaust, and he ordered 8 Ferrea valves to make a new whole matching set for the exhaust side of the heads.

After cleaning and disassembly of the heads, it was discovered that one head had knurled guides and lots of slop on the valvestems. To remedy this, K-line valve guide inserts were utilized all around in both heads to get us a fresh, good start at a valve job and concentric seats without wobbly valves and without damaging the nicely ported castings that went all the way down to the end of the guides.

Once the new seats are installed and receive a valve job, the intake side will get the valvejob for the 2.125 intake valves and the testing/porting fun will begin. Hopefully the seats and exhaust valves show up tomorrow or in the next few days.

It looks like we really need the Batten BBO intake..... so I am searching
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