AP-Engineering

These are the flow numbers for our Stage I 6.0 liter cylinder heads. These heads are fully CNC ported. The intake was flowed with a radius entry and a tube on the exhaust side. They were also flowed on a 3.970" bore. The heads were tested at 28" on a Super Flow 600.

INTAKE
.100" / 66 CFM
.200" / 139 CFM
.300" / 213 CFM
.400" / 259 CFM
.500" / 283 CFM
.600" / 297 CFM
.700" / 305 CFM

EXHAUST
.100" / 62 CFM
.200" / 117 CFM
.300" / 161 CFM
.400" / 200 CFM
.500" / 219 CFM
.600" / 229 CFM
.700" / 243 CFM


Any questions just let me know.

Thanks

Vents

iTrader: (9)

have you guys had any interest in developing a set of 320+ cfm heads?

Scalpel

iTrader: (4)

Lookin' good, Chris

11 Bravo

iTrader: (3)

320+ stage 1 heads??

AP-Engineering

Give me about a week and you will see our 320cfm heads. We are working on them currently. They will have a welded up chamber on them. I will let you guy's know when I have some numbers, hoping for 320+. They will have larger valves.

Thanks,

Chris@AP-Engineering

iTrader: (-2)

TTT

Thanks

99Fbody99

Chris,

What size valves are in these heads? Stock or??
Also, Springs??

David

Chris@AP-Engineering

iTrader: (-2)

They have Comp Cam 978 valve springs and 2.020/1.575 Manley stainless steel valves in them. I have these on sale right now also, check it out in the sponsor / GP section. I don't think that you will be able to beat this deal.

Thanks

Cstraub

iTrader: (1)

For curiosity sake, what camshaft is recommended for these heads on a NA combo with 11 to 1 compression, 346CID, stock rod length, for a maximum effort daily driver with no emmissions testing?

Thanks

Chris

99Fbody99

comp 978 with Ti retainers Great!!

What type of turnaround time can be expected?
Are they still done by the same shop as previous?

David


Thanks

BOO HOO BRIAN

iTrader: (-10)

99Fbody99, Yes they are still done by the same shop. They do our CNC porting on all our heads. Right now you will be looking at a maximum of 2 weeks to get these.

Chris, I would say that you could use a 234 / 238 @.050 w/.610 lift on a 110 LSA. Give or take on how much you want to put up with for a daily driver. You could go a little bigger.

Thanks

Ed Curtis

PORT VOLUMES????

Ed

Smoke_ur_5.0

iTrader: (2)

Really nice mid lift numbers. People overlook those too often.

AP-Engineering

EDC - port volumes on these heads are 235cc intake runner, 90cc exhaust runner.

Ed Curtis

Thanks Chris...

I'll add your figures to the database...

BTW... Good Luck with the new adventure!

Ed

AP-Engineering

No problem I will have our other heads up by tomorrow.

HOSS99

EDC,

Where is this database? Can I have a link?

Ed Curtis

Sorry Hoss... No Napster sharing here..

The information is strictly for my camshaft design program...

I have flow tested a bunch of LS heads on our SF600 and I need a log of "accurate" info to be sure I get the profiles right. What I have from Chris will be added as "his" figures and if/when a set is tested here, I will compare the numbers "advertised" vs what I get here.

We have "advertised" flow figures from a lot of cylinder head shops on file and I have to use a "factor" to get some of them back to reality for use in my program. Once I get this "factor" figured out for each shop's work, I can then use this "number" to establish a common denominator for "advertised" flow figures vs what I get on our bench. After all, pretty much everyone gets a little "flowery" with flow numbers in order to sell heads to buyers who only use these numbers to purchase heads..

It's been very successful on my Ford and small block Chevy camshaft designs so I take the chance that it also works for the LS heads...

Ed

HOSS99

OK. Thx.

AP-Engineering

Ed, who is grinding your cams if you don't mind me asking? PM me or call if that suits you better. Thanks,