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Discussion Starter #1 (Edited)
here are the numbers for ported and stock heads.
please don't dispute the print.



SHM heads pi heads full race + core

2056-PI .......................................pair $3250.00
• Current production SOHC 2V aluminum heads
• High flow stainless 45mm intake and 36.mm exhaust valves
• Full race port and polish, includes advanced bowl, short turn and runner work on both intake and exhaust
• Intake flows 225 cfm, 0.600” lift
• Exhaust flows 205 cfm, 0.600” lift
• 47cc chamber volume
• Works best with our more aggressive grind cams, intake and full exhaust systems
• Fully machined and assembled


4v race SHM race plus core

2047 ................................pair, exchange $7495.00
• 99-01 production 4.6L DOHC 4V aluminum heads
• Extreme porting, massive chamber reshaping, dual valve
springs, oversize seats and high flow stainless valves make
this one of SHM’s best heads
• Designed to be used with SHM’s more aggressive cams
• Completely machined and assembled using SHM exclusive
stainless valves, titanium retainers, and single groove locks,
race seals, high rev dual springs, and mag-bronze guides
• O-ring available for use with our copper gaskets
• 54cc chamber volume
• Intake flows 288 cfm @ .500 valve lift
• Exhaust flows 237 cfm @ .500 valve lift

stage 1 trick flow twisted wedge + core

Intake Flow with #1205 Brzezinski inlet
.100 in. lift: 69 cfm
.200 in. lift: 143 cfm
.300 in. lift: 216 cfm
.400 in. lift: 255 cfm
.450 in. lift: 267 cfm
.500 in. lift: 274 cfm
.550 in. lift: 283 cfm

Exhaust Flow with 1 3/4 in. x 4 in. stack
.100 in. lift: 57 cfm
.200 in. lift: 120 cfm
.300 in. lift: 152 cfm
.400 in. lift: 179 cfm
.450 in. lift; 189 cfm
.500 in. lift: 198 cfm
.550 in. lift: 205 cfm

Stage 2 Specifications

Combustion Chamber Volume = 65cc

Valve Sizes = 2.020 Int, 1.600 Exh

Max Flow Int. - 300cfm @ .600"

Max Flow Exh. = 220cfm @ .600"


cnc work 1995 per pair. FOX LAKE numbers

so there it is 3v flow close enough to ALL the rest for the claims that they don't or can't make as much power.


surely nobody can argue with TFS or FOX LAKE or SHM can they?

there was a call for numbers. so there they are. -bill
 

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assasinator said:
here are the numbers for ported and stock heads.
please don't dispute the print.

SHM heads pi heads full race + core

2056-PI .......................................pair $3250.00
• Current production SOHC 2V aluminum heads
• High flow stainless 45mm intake and 36.mm exhaust valves
• Full race port and polish, includes advanced bowl, short turn and runner work on both intake and exhaust
• Intake flows 225 cfm, 0.600” lift
• Exhaust flows 205 cfm, 0.600” lift
• 47cc chamber volume
• Works best with our more aggressive grind cams, intake and full exhaust systems
• Fully machined and assembled


4v race SHM race plus core

2047 ................................pair, exchange $7495.00
• 99-01 production 4.6L DOHC 4V aluminum heads
• Extreme porting, massive chamber reshaping, dual valve
springs, oversize seats and high flow stainless valves make
this one of SHM’s best heads
• Designed to be used with SHM’s more aggressive cams
• Completely machined and assembled using SHM exclusive
stainless valves, titanium retainers, and single groove locks,
race seals, high rev dual springs, and mag-bronze guides
• O-ring available for use with our copper gaskets
• 54cc chamber volume
• Intake flows 288 cfm @ .500 valve lift
• Exhaust flows 237 cfm @ .500 valve lift

stage 1 trick flow twisted wedge + corenWhat? No price?

Intake Flow with #1205 Brzezinski inlet
.100 in. lift: 69 cfm
.200 in. lift: 143 cfm
.300 in. lift: 216 cfm
.400 in. lift: 255 cfm
.450 in. lift: 267 cfm
.500 in. lift: 274 cfm
.550 in. lift: 283 cfm

Exhaust Flow with 1 3/4 in. x 4 in. stack
.100 in. lift: 57 cfm
.200 in. lift: 120 cfm
.300 in. lift: 152 cfm
.400 in. lift: 179 cfm
.450 in. lift; 189 cfm
.500 in. lift: 198 cfm
.550 in. lift: 205 cfm

Stage 2 Specifications

Combustion Chamber Volume = 65cc

Valve Sizes = 2.020 Int, 1.600 Exh

Max Flow Int. - 300cfm @ .600"

Max Flow Exh. = 220cfm @ .600"


cnc work 1995 per pair. FOX LAKE numbers

so there it is 3v flow close enough to ALL the rest for the claims that they don't or can't make as much power.


surely nobody can argue with TFS or FOX LAKE or SHM can they?

there was a call for numbers. so there they are. -bill
I put the parts in BOLD that most normal people care about.

I can fill in the blank for the TFS heads. Even with Stage 2 porting they aren't within $1000 of the cheapest alternative modular head.

You don't need to convince me though. I'm already convinced. I will be starting the switch in February.
 

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Discussion Starter #4
i seriouslt recommend 4.6 3v. or 4v. there are some things we are find in the 3v that other heads don't have.

the picture of the 3v intake port dramatizes the volume available for top end. the velocity for laminar filling is very good. there is very little turn for the charge to enter the chamber. much less than 4v. maintaining charge momentum is critical for filling. any small bend destroys laminar flow. the more bend the more damage. victor heads flow up to 350+ cfm, but is that real streetable ? not really.

stang169 has Al Pappito ported 3v's. he didn't remove all that much material. there is plenty more there. not perormance but material, he said any more and it hurts velocity. there is also less shrouding of 3 than 2v. the valves are not shrouded for most of their travel.

if 5.4 is so hard to get in 4.6 3v is going to be in all the junkyards soon. jujst a matter of time. if you want to do it, it can be done.

has anyone stopped to think why a 05 06 gt runs 13.5 off the showroom floor?

VCT and 3v.
 

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Discussion Starter #5
why are you posting more insults. i though your moderator made it clear.
 

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Whining Intakes Rock
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knock it off
 

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When the first 3V makes it into a MN12 chassis, please post it. Otherwise I think the ModularDepot forum is a better place for this.
 

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assasinator said:
has anyone stopped to think why a 05 06 gt runs 13.5 off the showroom floor?
Again, you need to provide proof. I've personally seen about 7 different 2005 Mustang GT's run in the mid 14's at best and that was a NMRA meet at National Trail Raceway. There were also about 4 others that ran in the 10's but they were wildly modified and were running KB superchargers.

Also, you already provided evidence that showed that the 3V and 4V heads don't have as much intake flow as the TFS heads. It's no secret that the small block Fords have some significant constraints when it comes to stock header design and exhaust ports that hurts overall flow there.

In the end, what matters is the time slips. Take the same car, same weight and same setup with different engines and compare them side by side. For $7500 I would expect them to outflow a set of big block heads and absolutely outperform my lowly 347. My entire engine didn't cost that much.

Enough on that. There is no need to troll and put up stuff that nobody cares about. I know who sent you over here and you need to cut it out.
 

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and by the way..flow ain't sh!t.... it's the curve that matters
 

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High-Mileage 4.6L Thrasher
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MaddMartigan said:
Enough on that. There is no need to troll and put up stuff that nobody cares about. I know who sent you over here and you need to cut it out.
Amen.
Same ****-new day.
JL
 

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Just FYI not alot of people see 500 lift on the modular motors, I don't think anybody see's 600 lift.

I don't know of a street car that spends any time at 500 lift, I may be wrong.

4v heads are out in circulation destroying all the numbers you posted, by a good margin.

Stock 4v heads support so much HP, there is no need to mortgage the house to have a hand crafted work of art set of heads ported to hell and beyond.

Unless your making 750+ rwhp, I wouldn't even consider it, other than a valve job and light cleanup.

As far as pure airflow goes, the 4v heads will always be king, but airflow under the curve, below max numbers matters on an NA engine.

a 2v motor can be made to kick out more power than an mn12 chassis can handle, or put to the ground with radials so there is no need to change to achieve a power goal.

As far as I know one of the fastest Tbirds (talking 1320 times) has a 2v, and the fastest NA Birds have 2v's as well (after Mike T. sold his superbird, it had a 4v going 9's hehehe, but it was a 4-link race car).

Certainly good to compare to make your own decisions on what direction, but IMHO, just watch Factory stock to see who's winning and who's whining.

Now they are changing the rules to fugg the 4v guys, to support the old technology, the top racer is moving to a different class, and will keep running his 4v!

What else is there to know?!?! If the 3v could make more power, there would be atleast a handful of guys at the track running them, I've seen a few 05 Stangs running the ranks, converted over to 4v motors.

Run what ya brung, and what you want.

I'm sick of all this bench rac'n I'm ready to go get some track runs in, even if I have to rent a NEON SRT-4, hahaha.
 

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lucky guys, If I could find work in NC I'd be there in a hearbeat.

I have family in Raleigh/Durham area.

I heard they were golfing the week before last!!!!

No fair!!!
 

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FordFanatic said:
well its been kinda chilly the last couple of days, the high was only in the mid 50's. :D
:xpcry: :zbash:

Yeah my uncle said it get's wamer than he likes about 2 months out of the year, and he loves the other 10.
Michigan you get about 2 good months, sometimes they are too hot as well, lol. (muggy)
 

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so how bout them panthers?
 
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