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01redR/T
Dodge Dakota
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10/12/2004
20:51:54
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 Subject: Head Porting
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Anyone know of a website that gives you tips and instructions on headporting, I am thinking of porting the heads on my R/T.
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Science Guy
Dodge Dakota
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10/12/2004
21:17:30
|  RE: Head Porting
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Unless you're boosting or have extensive intake/cam/exhaust mods, you're wasting your time.
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01redR/T
Dodge Dakota
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10/15/2004
12:07:41
|  RE: Head Porting
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yeah I plan on putting all new upgraded internals in the motor.
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Not So
Dodge Dakota
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10/15/2004
17:32:39
| RE: Head Porting
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You do not need extensive mods to take advantage of porting magnum heads. If you have ever had your intake off and looked into the intake ports you will not believe how small the ports narrow down to. It is no wonder that these engines lose power about 5,000 rpms.
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Science Guy
Dodge Dakota
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10/16/2004
10:29:24
| RE: Head Porting
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Hey Not So, the average joe doesn't have a "nascar" type motor in their dak. And how many people do you know zing their stock motors past 5000 rpm's and keep it above that rpm range for an extended time? FYI, the stock magnum motor quits pulling at 5000 rpm not because of the port runners, but because of many other factors that are way too long to describe. I will agree with you that porting is beneficial on any motor that consistently sees 3000 rpm's and above, and that stock runners (intake and exhaust) are not flow friendly. There's no dispute there. However, porting is generally reserved for a motor that has the added benefit of EXTENSIVE and EXPENSIVE intake, cam and exhaust mods. I'm merely suggesting to 01redR/T that he may want to reconsider the porting option. If 01redR/T's intent is to build a nearly full race motor, then he's be a fool not to port. However, that motor will need high maintenece to keep running, AND it wont be smog friendly.
01redR/T, save porting for last. It can be the most expensive and labor intensive part of making that motor breathe. The average (emphasis on average) daily driver doesn't need ported heads whether or not you're spraying/boosting.
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Here
Dodge Dakota
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10/16/2004
11:12:24
| RE: Head Porting
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http://www.extremehone.com/home.html
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Greg
Dodge Dakota
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10/16/2004
15:18:05
| RE: Head Porting
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I did all of the head porting on mine myself and it's a daily driver, but it does have a cam, exhaust, intake, rockers and soforth in it as well... It's also a V6 3.9 magnum and I can honestly say that the runners are like a night and day difference on both intake and exhaust... Esspecially exhaust since you can remove nearly a handfull of metal out of each port and a little bit on the intake around the quench area...
I recommend that if you are going to do the head port that you get someone who has done it or knows exactly what to do because there are a lot of areas esspecially in the exhaust that have to be left due to flow patterns and turbulances...
Also the R/T heads flow better anyway, so you may not want to even worry about the heads anyway...
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IntenseDak39
*GenIII*
10/16/2004
17:38:44
| RE: Head Porting
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R/T's do not come stock with "R/T heads"
they come with the same head as every other 5.2/5.9 magnum motor
6.6 Lt. Big Block, 727 TF shift kit, 452 heads, edelbrock 750 cfm, .513/.513 284/300 crower cam, comp cams springs, comp cams pushrods, 1.5 roller rockers, dp intake, mopar ignition, mopar windage tray, dual exhaust w/ 40 series flowmasters, 4.10 gears, coilover drag suspension, approx, 3500 lbs
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gen1dak
Dodge Dakota
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10/16/2004
22:20:09
| RE: Head Porting
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And the main reason they lose power at 5 grand is the wimpy cam. With a good cam, the stock heads, unported, will support 400hp at 6 grand.
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N56629
Dodge Dakota
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10/17/2004
00:45:00
| RE: Head Porting
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Before wasting a lot of money on Extreme Hone, read this
http://www.popularhotrodding.com/tech/0210phr_part1dodge/
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Wakawaka
Dodge Dakota
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10/17/2004
12:38:47
| RE: Head Porting
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Did YOU read it, N56629?
They (PHR) seem quite happy with it, blaming the larger intake runners in the R/T heads for reduction in port velocity, thus the poor overall result, no blame to Extrude-Hone.
The prices quoted on the ExtremeHone site are in Canadian funds, similar figures to US but obviously cheaper by rate of exchange. And probably cheaper than a PCM from Mopar!!
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N56629
Dodge Dakota
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10/17/2004
20:51:57
| RE: Head Porting
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"Did YOU read it, N56629?
They (PHR) seem quite happy with it, blaming the larger intake runners in the R/T heads for reduction in port velocity, thus the poor overall result, no blame to Extrude-Hone."
I've read it several times. Why???
Did you read the subject of this thread? "I am thinking of porting the heads on my R/T."
Why would it work on a different R/T? Did I place "blame" on Extrude-Hone? NO, of course not. I merely pointed out an article that was relevant. While they may have been "happy" with the quality of the work, they certainly were not happy to find out that they gained little or nothing.
No matter what the exchange rate may be, if it isn't likely to produce meaningful results, there is little point in suggesting it.
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Wadak
GenIII
10/18/2004
00:12:02
| RE: Head Porting
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Standard Abrasives has an excellent do it yourself guide on their web site, you can even download it in pdf format at the follwing location:
http://www.sa-motorsports.com/diyguide.shtm
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Not So
Dodge Dakota
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10/18/2004
19:25:09
| RE: Head Porting
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Gen 1, do you know the flow numbers on a stock magnum head.? I do not believe that with the 1.8 whatever intake valves you will get 400 hp.
KRC has a 2.02 intake non ported R/T head tested on a 360 with the lightning package and claim 300 rwhp, this is a better head, larger valve and still no 400 hp.
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Science Guy
Dodge Dakota
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10/18/2004
19:36:29
| RE: Head Porting
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Not So, hence the phrase "bigger isn't always better".
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Not So
Dodge Dakota
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10/19/2004
07:37:59
| RE: Head Porting
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My point being, if the larger valve better flowing R/T head doesn't make over 300 rwhp how can a stock head with smaller ports and valves make 400 hp.?
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Science Guy
Dodge Dakota
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10/19/2004
09:43:24
| RE: Head Porting
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Velocity and pulses.
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N56629
Dodge Dakota
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10/19/2004
12:32:09
| RE: Head Porting
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"how can a stock head with smaller ports and valves make 400 hp.?"
Forced induction. Use smaller intake valves and larger exhaust valves with FI and larger intakes with NA.
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Science Guy
Dodge Dakota
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10/19/2004
15:11:59
| RE: Head Porting
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Forced induction is a given which happens to fall in the category of "velocity".
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N56629
Dodge Dakota
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10/19/2004
17:09:25
| RE: Head Porting
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"Forced induction is a given which happens to fall in the category of "velocity"."
And your point is what?
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Not So
Dodge Dakota
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10/19/2004
20:46:03
| RE: Head Porting
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Science Guy doesn't have a point. This topic has gotten way off course. Super chargers, turbo's, nitrous will do it but that is not the point. My original reference to the restrictions in the stock head are accurate and porting will help the engine breath. You do not need to have a "NASCAR" type engine (not motor) for it to respond, and this by no means endorses hoging out the ports. Pick up a book on cylinder head porting by a reputable engine builder and do a little studying you might learn something.
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