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Re: SB Head Choices
[Re: DJVCuda]
#1332234
11/16/12 02:55 AM
11/16/12 02:55 AM
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Joined: Feb 2007
Posts: 1,025
Las Vegas, NV
dodgeboy11
super stock
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super stock
Joined: Feb 2007
Posts: 1,025
Las Vegas, NV
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Last machine shop I worked at I had the pleasure of building a stroked 360 with some oval port indy heads I ported. Forged scat crank, scat I-beam rods (the cheap ones) and KB flat top pistons at zero deck. I did a moderate port job on the heads and I remember peak flow being 327 cfm @.650". I remember that number because I achieved it on my first try and was a bit upset due to the fact that I spent a week on one port of my RPM LA heads with 2.080" intake valve and a 5/16" stem and managed 317 cfm @.700". Guess when you start with a better design, everything comes easier. But I'm getting off topic. That 408 with the indy heads had a hydraulic erson roller cam and those crap indy rocker arms. I was not pleased with the pushrod angularity because the pushrod seat in the lifter is very high on the hydraulic roller lifters. None the less, this engine produced 575 hp @ about 6200 rpm. It would spin to 6500, but the valvetrain would not support it and power dropped off significantly. Intake was a matching indy single plane, also ported by yours truly. Keep in mind, this was 11.5:1 CR. Maybe not the most ideal for a daily driver. I cannot remember the specifications on the cam, but I want to say it was 258, 266 @ .050" with a 108 lsa and .375" lobe lift. I'm sure I'm not absolutely correct on the specifications, but I know I'm in the ball park.
Block was studded on the mains. It really needed a solid roller and some T&D rocker arms. Ah well, I wasn't the one to put the parts list together, I just worked with what I was given, minus the indy pushrods. Threw them in the trash and ordered Smith Bros...
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Re: SB Head Choices
[Re: 69Cuda340S]
#1332236
11/25/12 07:40 AM
11/25/12 07:40 AM
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Joined: Sep 2009
Posts: 25
Texas, USA
razoreyes45k
OP
member
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OP
member
Joined: Sep 2009
Posts: 25
Texas, USA
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Quote:
You can send him a PM here his user name is RyanJ. You can also PM Brian from IMM user name ou812 he can also set you up with what you need including some ARP main studs...
Thanks again for the referral. As I finish mocking up the short-block, I'll contact Ryan for further consultation.
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Re: SB Head Choices
[Re: dodgeboy11]
#1332237
11/25/12 08:13 AM
11/25/12 08:13 AM
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Joined: Sep 2009
Posts: 25
Texas, USA
razoreyes45k
OP
member
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OP
member
Joined: Sep 2009
Posts: 25
Texas, USA
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Quote:
Last machine shop I worked at I had the pleasure of building a stroked 360 with some oval port indy heads I ported. Forged scat crank, scat I-beam rods (the cheap ones) and KB flat top pistons at zero deck. I did a moderate port job on the heads and I remember peak flow being 327 cfm @.650". I remember that number because I achieved it on my first try and was a bit upset due to the fact that I spent a week on one port of my RPM LA heads with 2.080" intake valve and a 5/16" stem and managed 317 cfm @.700". Guess when you start with a better design, everything comes easier. But I'm getting off topic. That 408 with the indy heads had a hydraulic erson roller cam and those crap indy rocker arms. I was not pleased with the pushrod angularity because the pushrod seat in the lifter is very high on the hydraulic roller lifters. None the less, this engine produced 575 hp @ about 6200 rpm. It would spin to 6500, but the valvetrain would not support it and power dropped off significantly. Intake was a matching indy single plane, also ported by yours truly. Keep in mind, this was 11.5:1 CR. Maybe not the most ideal for a daily driver. I cannot remember the specifications on the cam, but I want to say it was 258, 266 @ .050" with a 108 lsa and .375" lobe lift. I'm sure I'm not absolutely correct on the specifications, but I know I'm in the ball park.
Block was studded on the mains. It really needed a solid roller and some T&D rocker arms. Ah well, I wasn't the one to put the parts list together, I just worked with what I was given, minus the indy pushrods. Threw them in the trash and ordered Smith Bros...
Wow, those are very impressive flow numbers (to me).
Push-rod pinch area: Do you find that porting through this obstruction, then installing brass sleeves makes less air-restriction, and is it worth doing considering cost/performance ?
Roller/Lifters: Which ones did you use? Would using a differnt roller lifter offer a better result considering the 59* lifter angle?
Intake Manifold: How did your single plane behave in the lower RPM's ?
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