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AP-Engineering LS6 Race head

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Old Mar 18, 2004 | 09:28 AM
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Default AP-Engineering LS6 Race head
Well here are some numbers for our LS6 race head. Just got off the flow bench last night with these. Here are the spec's:

LS6 castings
Manley 2.080 stainless steel intake valves
Manley 1.600 stainless steel exhaust valves
Comp Cams titanium retainers
Comp Cams 978 springs
Bronze guides
teflon seals

Intake Flow numbers
.100" / 78.8 cfm
.200" / 163.9 cfm
.300" / 221.7 cfm
.400" / 275.9 cfm
.500" / 310.7 cfm
.550" / 323.2 cfm
.600" / 332.6 cfm
.650" / 338.4 cfm
This head was flowed on a 4.125" bore w/ a radius inlet and was tested @ 28"

Exhaust flow numbers
.100" / 65.4 cfm
.200" / 114.1 cfm
.300" / 163.0 cfm
.400" / 207.7 cfm
.500" / 251.0 cfm
.550" / 263.7 cfm
.600" / 266.8 cfm
.650" / 269.6 cfm
The exhaust was flowed with a tube

If you have any questions please feel free to ask.

Thanks,
Last edited by Chris@AP-Engineering; Mar 18, 2004 at 09:57 AM.
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Old Mar 18, 2004 | 09:30 AM
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amazing. very very cool!
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Old Mar 18, 2004 | 09:31 AM
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great numbers

I think you made a typo though in the .600 lift on the exhaust side
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Old Mar 18, 2004 | 09:34 AM
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Looks good. A couple of questions/requests.

1. Runner volumes
2. Bench used
3. Can you flow them on a 3.9 fixture?

Thanks, and keep up the good work.

Originally Posted by Chris@AP-Engineering
Well here are some numbers for our LS6 race head. Just got off the flow bench last night with these. Here are the spec's:

LS6 castings
Manley 2.080 stainless steel intake valves
Manley 1.600 stainless steel exhaust valves
Comp Cams titanium retainers
Comp Cams 978 springs
Bronze guides
teflon seals

Intake Flow numbers
.100" / 78.8 cfm
.200" / 163.9 cfm
.300" / 221.7 cfm
.400" / 275.9 cfm
.500" / 310.7 cfm
.550" / 323.2 cfm
.600" / 332.6 cfm
.650" / 338.4 cfm
This head was flowed on a 4.125" bore w/ a radius inlet and was tested @ 28"

Exhaust flow numbers
.100" / 65.4 cfm
.200" / 114.1 cfm
.300" / 163.0 cfm
.400" / 207.7 cfm
.500" / 251.0 cfm
.550" / 263.7 cfm
.600" / 332.6 cfm
.650" / 269.6 cfm
The exhaust was flowed with a tube

If you have any questions please feel free to ask.

Thanks,
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Old Mar 18, 2004 | 09:36 AM
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holy crap those are some great #'s...jrod also asked the same questions i have
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Old Mar 18, 2004 | 09:37 AM
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Originally Posted by J-Rod
Looks good. A couple of questions/requests.

1. Runner volumes
2. Bench used
3. Can you flow them on a 3.9 fixture?

Thanks, and keep up the good work.
I'd also like to know the above. In addition to those can you tell us what size the combustion chamber ends up being on one that isn't milled?
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Old Mar 18, 2004 | 09:52 AM
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wow, i am impressed.
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Old Mar 18, 2004 | 10:05 AM
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Yep, I did make a typo, my bad. I corrected it know, thanks Chris.

These heads were flowed on a Super Flow 600
I will get you runner volumes in the next couple of hours. Also the chamber sizes of unmilled heads. We basically can get you chamber sizes from 68cc down to what ever you want to mill them too.

I will try to get them on the bench tonight with a 3.9 bore and will give you the results as soon as I get them.

Thanks for all of the questions.
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Old Mar 18, 2004 | 10:15 AM
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Very impressive.. That's enough cfm to support some HUGE horsepower #'s. Put those on Mike K.'s setup..
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Old Mar 18, 2004 | 10:35 AM
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Price?
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Old Mar 18, 2004 | 10:42 AM
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Very good #'s I to am impressed!! Keep up the good work!!
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Old Mar 18, 2004 | 12:43 PM
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Price?
Dyno numbers?
Track times?

Looks good!
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Old Mar 18, 2004 | 01:14 PM
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Nice work Gel
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Old Mar 18, 2004 | 01:22 PM
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Price?
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Old Mar 18, 2004 | 01:46 PM
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Pricing has not been finalized yet.
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Old Mar 18, 2004 | 01:55 PM
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Yeah I too want to know how they flow on a 3.9. Good work guys!
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Old Mar 18, 2004 | 02:39 PM
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Im unsure that there would be any benifit to a 2.08 valve on a 3.9 bore. There might be too much shrouding.
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Old Mar 18, 2004 | 04:05 PM
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Grats on the flow numbers guys!! Keep up the good work.
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Old Mar 18, 2004 | 09:12 PM
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WOW, absolutely amazing. You guys keep pushing the envelope, and the communication and customer service are second to none. Congrats.

I know who I'll be talking to for my next motor.

Bad30th
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Old Mar 19, 2004 | 12:23 AM
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Yeah, how bout some pix of the runners.....LOL
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