EQ Head ?????

[88bluestar]

Having talked to a few head porters. 2925 is the best option, with slight port match although I’ve been told the match isn’t critical port on outboard sides is what shows when they are bolted up. Plan to gradually just roll it back and leave a little bit to keep velocity up. Opinions on what valve job angles work best with our cam and rpm rules? Figure a 5 angle per my head builder had suggested but want opinions just to see what the overall feeling is. These are Ferrea 5000 series valves by the way. Was planning to clean the plenum entries on the 2925 on the roof of the inside ports, clean and radius it but not go over board opening them a lot. Focused on mid range

bluestar,
those heads will need some work like all as cast heads,they stall at .500'' lift,and the # go down from there,thats no good.
i understand you are on a budget like the rest of us,but bolting on a intake manifold that is 1.28'' x 2.25 onto a 176 cc port is a decent miss match surely.
i have a super victor manifold and it fits my dart 215 heads as cast.
Newold,John,Eric,Larry M have all put up some good information,i remember your other thread,was there any talk of epoxy those bigger heads down in CSA in the runner back to around 200cc which might work ??
i personally cant see how your engine would make good power if the heads were not corrected for your application,a good valve job is a start but working out your minimum cross section (pinch or valve throat) and working your average CSA through the entire intake tract as an example,unless you can do the heads yourself it will cost money for a good head porter.
this is just my opinion,hope it works out for the best

They are being ported, just haven't taken them yet. The other heads you speak of were sold. my plan is to have a head thats around 180-190, Mostly concerned with making great mid range over big hp numbers. With so many limitations on cid, compression and rpms I really don't want to get to crazy with opening them up. Also using 93 octane pump gas.

[steve cowan]

Bluestar,
Thanks for the confirmation, hopefully works out well

[dfarr67]

On the vortec topic but a little wayward.
Have a set of AFR vortec's with the base cnc- didn't want to spend the extra for competition option at the time. Would it be worth sending in for the competition option now as they are still a current head, or send out for competent porting and intake valve upsize?

[Newold1]

Define what the AFR Vortecs are now as done. Valve sizes, port cc's., combustion chamber cc's.

What is the engine build you are using them on.
What Rpms are you looking for.
What camshaft profile, lifts, rocker ratio.
With the spec. they are at now what is flow at your current lifts?
With the changes what will they flow at the same lifts?

[dfarr67]

Application street/truck, 4x4, 700r, 3:73, 31in tires.
Heads were purchased for a SBC 355 with Edelbrock TPI.
New engine is 385, 9.5:1, FIRST TPI, hr cam spec attached.
Heads have not been molested from AFR 2.02/1.6, rr 1.6 int, 1.52exh.
rpm idle through 5500, max efficiency around 2000 cruise.
https://www.airflowresearch.com/190cc-s ... nder-head/

[Newold1]

Those heads as they sit right now are more than the build you list Will need from a head at the .510" lift cam you list now.
If you want to upgrade and improve your build take a hard. Look at a better cam. Not sure what you are trying to achieve with engine, but better cam needs consideration.

[dfarr67]

I wanted a cam that was easy on the valvetrain- this is a Erson cam and to be fair they wanted to sell me a bigger cam and I got scared-- I mean my attitude was/is..... who has been disappointed from picking a smallish cam as opposed to too big, perhaps the suggested 'big' cam wasn't big at all ('give it what it wants'-comes to mind). I did however give accurate info on vehicle application.

I kind of wish now that I bought into DV cam program (or similar)- the more I try to learn about cams the more my ignorance for such an important part seems to grow. My concern comes from an EFI application based on SD- although ecu is fully tuneable.

My application suffers from a wish for good DD manners and reasonable economy vs my wish for the best the 385 has to offer. These comments from Mike Jones.

See post #12
https://www.yellowbullet.com/forum/show ... ?t=2538881

[Newold1]

My suggestion is get a better EFI design camshaft in the 212/218 duration @ .050 range and keep the lift up closer to .600" and you have an easier to tune , strong low to mid range torque production for the truck and towing. You don't need that lopey idle even though you might want it and think it sounds cool.

[dfarr67]

This cam has a very smooth idle- your right the lope thing is a beautiful sound- none here. These are some cams I was thinking about at the time. If you were to pick a quality manufacturer and catalogue cam- what would you pick, Isky seems to have some fans.

Old Flowtech cam in a 355 I still have:
PN: NA-12X90S-HR10 +5* Customer: Dave Farr
Intake Exhaust
Valve Adjustment: .000” .000”
Lobe Lift: .350” .353”
Gross Valve Lift 1.50 Ratio: .525” .530”
Gross Valve Lift 1.60 Ratio: .560” .565”
Duration @ .050” Tappet Lift: 210* 214*
Lobe Separation: 110*
Recommended Intake Centerline: 105*

Crower
Specifications: part number #00463 or 00463 LM camshaft only cost $315
255° intake 264° exhaust advertised duration at .006
204° intake 213° exhausts duration of .050
.484 intake .505 exhausts
LC 110° these are 2 endurance cam lobe designs not race profiles performance:
366.07 hp at 5000 RPM power range 1500 – 5500
461.59 foot-pounds of torque at 3312 RPM
this is an extremely high torque profile excellent in tow vehicle.

Camshaft number 2 part number #00464 or 00464 LM
264° intake 273° exhaust advertised duration
213° intake 221° exhaust duration of .050
.505 intake .525 exhausts
LC 110°
performance:
389.11 hp at 5250 RPM
462.00 foot-pounds of torque at 3489 RPM

Crane as suggested 109671 219/224-509/528@112 .900in billet core
Jones LT1 HR 224/224-510/510@114 billet core.