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Ordered Mast Small Bore LS3's

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Old 01-03-2015, 07:16 PM
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Originally Posted by SCott5
Yea that seems to be the big problem with these small bore ls3s. It seems Ed Curtis likes them but other than that hard to find info
I was speaking more to the intake manifolds, but yes, you're correct there too.

Originally Posted by Titokang
You haven't gotten em yet? Since I ordered mine bare it took less than a week to get to me. Valves took about 3 weeks to a month. What springs are you going with?
Just waiting on an email to go pick em up. With the holidays and all shipping is a bit slow.

Springs are PAC 1221X with Ti retainers.
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Old 01-03-2015, 07:56 PM
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Has the cam been discussed at all?
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Old 01-03-2015, 08:13 PM
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Originally Posted by Rise of the Phoenix
Has the cam been discussed at all?
It will be rifle drilled to reduce its rotational weight by 2.x pounds.
It will have some silly camshaft sensor stuff near the rear bearing journal.
Most likely sixteen shiny bumps will open/close 8 intake valves and 8 exhaust valves.
This just in........the PAC valve springs will not be happy with the shapes of those bumps....
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Old 01-03-2015, 08:24 PM
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Originally Posted by Rise of the Phoenix
Has the cam been discussed at all?
Nothing more than "I'll be surprised by the specs". It's going to be a while before its together. There's a LOT of piecing together i need to do, as well as waiting on results of new manifolds...


Originally Posted by A.R. Shale Targa
It will be rifle drilled to reduce its rotational weight by 2.x pounds. It will have some silly camshaft sensor stuff near the rear bearing journal. Most likely sixteen shiny bumps will open/close 8 intake valves and 8 exhaust valves. This just in........the PAC valve springs will not be happy with the shapes of those bumps....


There you go again revealing secrets...
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Old 01-03-2015, 08:48 PM
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I wonder if the retainers and locks are standard ls parts. I'd really like to run some btr springs but Brian told me they wouldn't work with these 5/16 stems.
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Old 01-03-2015, 08:57 PM
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Originally Posted by Titokang
I wonder if the retainers and locks are standard ls parts. I'd really like to run some btr springs but Brian told me they wouldn't work with these 5/16 stems.
I got told the same. Sucks because I've ran those springs before on my Camaro and they were EXCELLENT to say the least. Brian is a great guy and knows his ****, no doubt.
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Old 01-03-2015, 09:08 PM
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I know, sucks they're advertised as taking ls valvetrain but that's not the case. I also talked to ed but need to be ready with some $. Xceldyne sells retainers for psi 1512's that are within .010 tolerance wise of btr retainers but they run $27 a piece. The k motions I have would work but the open pressures seem high and don't wanna jack up my valves.
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Old 01-03-2015, 09:16 PM
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Originally Posted by Titokang
I know, sucks they're advertised as taking ls valvetrain but that's not the case. I also talked to ed but need to be ready with some $. Xceldyne sells retainers for psi 1512's that are within .010 tolerance wise of btr retainers but they run $27 a piece. The k motions I have would work but the open pressures seem high and don't wanna jack up my valves.
Just a thought, but how much in the hole would you be selling the Platinums and going a different direction? Or is that not an option?
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Old 01-03-2015, 09:19 PM
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Don't have the platinums, I have the k800's with ti retainers and psi 1511's. I put the k800's up for sale but no one bit because they don't fit stock ls spring pockets.
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Old 01-03-2015, 09:21 PM
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Btr platinums are 150, seats for bronze guides are 40 I believe, 27 a retainer and 7 a set of locks through xceldyne. That's what's going on in my head right now haha
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Old 01-03-2015, 10:20 PM
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I contacted AI with possibility of small boring a set of LSA heads but if that is not an option I will be also purchasing a set of these heads for a 347 boost setup. Will have to contact ed about valvetrain setup and I will be running a BER ported ls3 intake since ber is right down the road from my house
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Old 01-05-2015, 12:30 PM
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Originally Posted by SCott5
I contacted AI with possibility of small boring a set of LSA heads but if that is not an option I will be also purchasing a set of these heads for a 347 boost setup. Will have to contact ed about valvetrain setup and I will be running a BER ported ls3 intake since ber is right down the road from my house
Keep us updated on what AI says about the small bore LSA heads.
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Old 01-05-2015, 03:48 PM
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Will do
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Old 01-05-2015, 05:48 PM
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Looking forward to seeing this build come together Dave!
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Old 01-06-2015, 11:13 AM
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Got the email back from Phil at AI today and it's a no on the small bore front
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Old 01-06-2015, 11:23 AM
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Originally Posted by SCott5
Got the email back from Phil at AI today and it's a no on the small bore front
Really? I thought he likes small valves.
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Old 01-06-2015, 12:18 PM
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Originally Posted by KCS
Really? I thought he likes small valves.
Exactly what I was thinking as well...
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Old 01-08-2015, 05:41 PM
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Pics coming soon...
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Old 01-08-2015, 05:55 PM
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Originally Posted by KCS
Really? I thought he likes small valves.
Originally Posted by dr_whigham
Exactly what I was thinking as well...
He said with the availability of the 6L block there isn't a real need for a small bore rectangular head and then suggested the 243/799
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Old 01-08-2015, 06:56 PM
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