Pontiac - Street No question too basic here!

          
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Old 08-23-2022, 10:50 AM
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From the other thread:

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Originally Posted by 64speed View Post
"My Machinist up using bbc rocker arms because even the 1.65” riockers we tried from three different brands ended up not being able to get a good contact pattern on the valve tips. I have no idea why but they bolted right on and work just fine"
This is a red flag for me...

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Old 08-23-2022, 10:51 AM
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My comment on the other thread:

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Originally Posted by HWYSTR455 View Post
"Hm. Something is askew here, I know I would like to see pics.

You say the 'geometry' is perfect with the BBC rockers? I know I would like to see a pic at mid lift. I'm guessing that the 'contact pattern' approach was used.

Also would be curious to know which lifters were used and the pushrod length. I'm betting there's a pretty short pushrod being used."

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  #3  
Old 08-23-2022, 12:23 PM
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That’s not who I used. Wayne Sless built my engine

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Old 08-23-2022, 01:06 PM
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I was going by this post, which is titled 'Carolina Machine Engines', and you started the thread:

https://forums.maxperformanceinc.com...d.php?t=819219

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1970 GTO Judge Tribute Pro-Tour Project 535 IA2
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Old 08-23-2022, 01:14 PM
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Quote:
Originally Posted by HWYSTR455 View Post
I was going by this post, which is titled 'Carolina Machine Engines', and you started the thread:

https://forums.maxperformanceinc.com...d.php?t=819219

.
Pretty obvious from that first post of the thread that 64speed was asking opinions of using Wayne Sless OR Carolina Machine

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Old 08-25-2022, 05:08 PM
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Quote:
Originally Posted by 64speed View Post
That’s not who I used. Wayne Sless built my engine
Came close to having Wayne do a BBC for a 78 Z28 a year ago. Just worried about part backlogs, etc...went w/ a stroked crate sbc, an outfit out of Kearney NB. Blueprint Engines - I think Frieberger loves them. Was on sale from Summit - my door in like 3-4 days. lol.

Wayne has a nice reputation and even did that video series on poncho motors. Wayne is in Anderson, SC now....I have not used, but would..

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Old 08-23-2022, 04:09 PM
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Wayne has a sterling reputation with Pontiacs. If I had to hazard a guess I would say one of my “noisy” Lunati lifters let go. I had a pretty good ticker. If I can I will use the cam and a better set of lifters. There was no terrible crunches or anything like that so I am just praying.

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Old 08-23-2022, 04:45 PM
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Regardless of what’s salvageable I will not be using those lifters. I always had a weird feeling about them when handling them. I felt like they should be more “robust” in a word but then I thought if it’s a Lunati cam why not lifters. Then I had the ticker and was frustrated but then I saw the post wanting noisy lunati lifters so I felt better. Since I will be replacing the lifters regardless what is the quietest and I hate saying best but what should I buy?

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Old 08-23-2022, 04:58 PM
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Jones from Jones cam told me he would run Johnsons.FWIW,Tom

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Old 08-24-2022, 12:59 PM
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Best pushrods.

https://mantonpushrods.com

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  #11  
Old 08-24-2022, 04:42 PM
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If it does not need any machining I am rebuilding it myself because if what me and Wayne speculate is true the lifter jumped the bore. NO one has any Pontiac cam blanks but Isky said they repair cams no matter how bad. If that’s what happened that’s the route I will take. I know I’m gonna catch hell for this but I have built 8 SBC and put cam and lifters in a 389 before. If I don’t have to do anymore disassembly than I hope then I feel confident I can do it.

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Old 08-24-2022, 04:54 PM
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Quote:
Originally Posted by 64speed View Post
If it does not need any machining I am rebuilding it myself because if what me and Wayne speculate is true the lifter jumped the bore. NO one has any Pontiac cam blanks but Isky said they repair cams no matter how bad. If that’s what happened that’s the route I will take. I know I’m gonna catch hell for this but I have built 8 SBC and put cam and lifters in a 389 before. If I don’t have to do anymore disassembly than I hope then I feel confident I can do it.
What are you going to rebuild? You paid a guy a lot of money to build your motor and if it were me I would be going back to him.

I overreved many times but that was with a HFT. Years in fact. MSD has a nifty ignition module with a build in rev limiter that will save you many future problems. Myself, I knew eventually there would be trouble back then but $100 bought a lot of beer.

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Old 08-24-2022, 05:19 PM
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Its not his fault that there was a possible parts failure. I am not rebuilding anything per se. I will take it out, take the pan and lifter valley off, assess damage and do what is needed but if possible I am gonna avoid taking the heads off etc.

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Old 08-24-2022, 05:58 PM
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Why not just pull the intake and valley pan and KNOW if it has to come out first!Tom

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Old 08-24-2022, 06:53 PM
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Quote:
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Why not just pull the intake and valley pan and KNOW if it has to come out first!Tom
Agreed. It could be as simple as replacing a roller lifter set and/or push rods from misadjustment. Hopefully no valve damage.

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Old 08-27-2022, 10:01 AM
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first pic looks like a busted pushrod....

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Old 08-24-2022, 07:20 PM
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Well I am going to do that this weekend but I still have to take it out to get the trash out of the pan

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Old 08-24-2022, 09:57 PM
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Well I am going to do that this weekend but I still have to take it out to get the trash out of the pan
Trash from what? Oil filter? I must have missed something ��.

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Old 08-24-2022, 08:09 PM
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Are you keeping the BB Chevy rocker arms on there?

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Old 08-24-2022, 10:02 PM
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How can you know there is trash in the pan?Tom

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