3400 Gen III Heads for sale (ported and polished)

[NateD4]

I have two sets of port and polished 3400 Gen III heads for sale. Available with valves and springs.

Let me know if anyone is interested.

[01GrandayumJeeTee]

how much? i'm looking for good heads for my 01 GT

[NateD4]

Three sets available. Three different port levels. Make me an offer and pick which flow levels you want. I'll have them flow benched and post pictures and numbers.

[NateD4]

Full flow bengkulu will cost $170 for all 6 cylinders. If anyone needs data to backup the port and polish job. Single cylinder numbers should be $50.00

[SappySE107]

do you know the flow of each set already?

[NateD4]

Sorry that should say flow bench in my previous post.

I have one flow sheet somewhere. I'll have to dig it up. It is only for one port though.

If memory serves, at 100% VE they flow enough to turn 10K rpm. Which is unrealistic for these pushrods engines.

[GrandAmGTTT]

PMed Very intrested!

[NateD4]

I'll try to post some pictures.... I'll have to figure out what the best way to do that is.

[NateD4]

Would you be interested in having them flow benched?

[NateD4]

Just got the flow numbers back from the flow bench. Looks like one set flows 230 CFM @ 0.600" (214 @0.500") intake valve lift.

And 152 CFM @ 0.600" (145 @ 0.500") exhaust valve lift.

[kwhauck]

That exhaust flow is worse than a set of stock heads......the intake is slightly better, like 5 psi....

[NateD4]

I can't agree with you. I have two other heads with similar flows. It could be a bad valve job. I'll have to take a look.

The other set of heads is worse.


BTW I've never seen PSI used to measure flow rate. The units are not compatible. 5 CFM isn't enough for me two worry about. Exhaust are less critical than intake.



Does anyone have a set of WOT flow numbers as a reference?

[kwhauck]

I can't agree with you. I have two other heads with similar flows. It could be a bad valve job. I'll have to take a look.
The other set of heads is worse.
BTW I've never seen PSI used to measure flow rate. The units are not compatible. 5 CFM isn't enough for me two worry about. Exhaust are less critical than intake.
Does anyone have a set of WOT flow numbers as a reference?

I meant CFM.......and I was referencing this page... http://wot-tech.com/shop/cylinder-he...ds/cat_91.html

where at .500 lift you have 210.1 cfm intake and 157.0 exhaust.....

vs. your 214 and 145.......

Just got the flow numbers back from the flow bench. Looks like one set flows 230 CFM @ 0.600" (214 @0.500") intake valve lift.

And 152 CFM @ 0.600" (145 @ 0.500") exhaust valve lift.

[NateD4]

I'll take a look at the ports. It wouldn't take much to open them up more.

But in all reality I think they are close enough. You really start trading velocity for flow at that point. I could probably get 250 CFM from them but It might hurt bottom end.

The exhausts aren't as big an issue as the mach number through the port is not bound as it is on intakes.

[NateD4]

Head Flows

Here are the complete flow numbers for these heads. There are two sets.

Exhaust:
Lift CFM
0.050 23
0.100 46
0.150 68.9
0.200 91.9
0.250 104.8
0.300 117.7
0.350 126.9
0.400 136.1
0.450 139.8
0.500 143.5
0.550 145.1
0.600 146.7

Intake:
Lift CFM
0.050 21.5
0.100 42.9
0.150 64.4
0.200 85.8
0.250 108.5
0.300 131.1
0.350 151.6
0.400 171.9
0.450 183.2
0.500 194.3
0.550 196.5
0.600 198.6


Second Set of Heads:

Exhaust CFM
Lift No. 1 No. 2 No. 3 No. 4 No. 5 No.
0.050 24.1 23.2 22.9 23.4 23.0 23.4
0.100 48.2 46.5 45.8 46.7 46.0 46.8
0.150 72.3 69.7 68.7 70.1 68.9 70.1
0.200 96.2 92.8 91.5 93.4 91.9 93.5
0.250 109.5 106.5 105.3 107.7 104.8 108.1
0.300 122.7 120.2 119.1 122.0 117.7 122.6
0.350 129.0 128.0 128.4 130.2 126.9 130.7
0.400 135.3 135.8 137.7 138.2 136.1 138.8
0.450 138.4 139.6 141.8 141.6 139.8 141.8
0.500 141.5 143.3 145.9 144.9 143.5 144.8
0.550 143.0 144.6 147.7 146.8 145.1 146.4
0.600 144.4 145.9 149.4 148.7 146.7 147.9

Intake: CFM
Lift No. 1 No. 2 No. 3 No. 4 No. 5 No. 6
0.050 21.9 22.6 21.5 22.3 20.8 21.9
0.100 43.8 45.2 42.9 44.7 41.6 43.8
0.150 65.6 67.7 64.4 67.0 62.5 65.7
0.200 87.5 90.3 85.8 89.3 83.3 87.6
0.250 110.2 111.4 108.5 111.4 105.9 109.3
0.300 132.9 132.6 131.1 133.5 128.4 130.9
0.350 153.7 153.8 151.6 153.5 150.0 151.1
0.400 174.6 175.0 171.9 173.4 171.6 171.3
0.450 186.2 187.4 183.2 184.7 184.8 185.0
0.500 197.8 199.7 194.3 196.0 197.9 198.5
0.550 200.0 204.1 196.5 197.7 200.8 202.4
0.600 202.1 208.6 198.6 199.3 203.6 206.3