5.4 3v ported heads
08-29-2013, 07:13 PM
#11
Senior Member
I hope I can speak for everyone but it's always a pleasure to help some one especially when it involves a lot of money. Haha
08-30-2013, 09:45 AM
#12
I wouldn't really mess with cams...... The hp per dollar spent isn't there. And where they do increase power and a little tq, you loose some hp and tq in the lower rpm band..... But with longtube headers, hi-flow exhaust, good CAI, and a custom tune you should see 40-50rwhp. A good longtube and high flow exhaust is around $2,000 alone.
A FRPP Whipple setup are around $6,500 but your looking at 100+ rwhp
A FRPP Whipple setup are around $6,500 but your looking at 100+ rwhp
08-30-2013, 09:48 AM
#13
There is a video on "Cam Removal" that somebody posted yesterday. It goes through the process of swapping cams.
They went with a Stage 1 (mild) cam. The dyno says they got 11 hp gain, IIRC.
Maybe another 5-8 with high flow exhaust.
Maybe 5 with CAI.
So IJDK is about right 20-25 with bolt ons. You could maybe go up to a Stage 2 cam and get a few more. You could surface the cylinder heads to get the compression up but then you will probably need to use 93 octane.
Hopefully we convinced you that ported heads are the last and least efficient thing to do. Like IJDK, do the research and ping guys on the forum. Get some Ford mod mags and read up on it and learn.
I think SC'ing is a lot of bang for the buck. Also when you start adding high flow exhaust/headers, cams, tune/programming, you will notice a lot more gain from those additional upgrades. Have fun with it and do the research.
They went with a Stage 1 (mild) cam. The dyno says they got 11 hp gain, IIRC.
Maybe another 5-8 with high flow exhaust.
Maybe 5 with CAI.
So IJDK is about right 20-25 with bolt ons. You could maybe go up to a Stage 2 cam and get a few more. You could surface the cylinder heads to get the compression up but then you will probably need to use 93 octane.
Hopefully we convinced you that ported heads are the last and least efficient thing to do. Like IJDK, do the research and ping guys on the forum. Get some Ford mod mags and read up on it and learn.
I think SC'ing is a lot of bang for the buck. Also when you start adding high flow exhaust/headers, cams, tune/programming, you will notice a lot more gain from those additional upgrades. Have fun with it and do the research.
10-14-2013, 05:36 PM
#14
I Like Tires
I know I'm reviving an old thread but I was kinda curious on possibility of head mods on our trucks and ran across this on google.
That link he posted is only for the right cylinder head so $2k for the whole set is definitely not worth the gains as that could go towards a S/C or T/C and gain a lot more power.
That link he posted is only for the right cylinder head so $2k for the whole set is definitely not worth the gains as that could go towards a S/C or T/C and gain a lot more power.
07-31-2017, 04:00 PM
#16
Junior Member
Join Date: Apr 2016
Posts: 10
Likes: 0
Received 0 Likes
on
0 Posts
Pisto
I think it would be fine to use stock cams, but I would say you will not see much difference in performance.
The combustion chamber is now 53cc versus OEM 51cc, which means a decrease in compression.
I wouldn't by these heads unless you plan on using forced induction (supercharger). If you aren't supercharging it, then I would only get the heads if you plan on using a bigger cam, headers, high flow exhaust, CAI, and a tune.
With the larger combustion chamber you will want to probably supercharge it and that is probably the intent here. Not sure how much that will drop compression. I don't think it would be very much.
In the end, $1000 is a lot of money for very minimal difference IMO. I could think of spending $1000 and get more performance out of the motor in other areas.
Now if you plan on doing a ton of work where the ported heads could be beneficial then go for it.
Back in the push rod days with the small block 350 chevy, 302 Fords, and big block Chevy and Fords, porting and polishing heads coupled with larger intake/exhaust valves was a hot upgrade. But there was a lot of flow to be gained in those cylinder heads, where there was 1 intake and 1 exhaust valve as compared to what can be gained in today's cylinder heads.
But then these upgrades would be proved unfruitful if you didn't get a high flow intake and bump up the carb sizes that could get more air and fuel to the higher flowing heads.
Cylinder heads these days flow a lot already with 3V and 4V cylinder heads. Like the old V8 small block days, the porting of heads will need more air and fuel getting to the better flowing heads in order to realize the potential of the newly ported heads. In today's motors that means forced induction, CAI, higher pressure fuel systems, engine tunes, high flow exhaust, etc.
Unless you plan on doing all that, I wouldn't spend my money on these heads. I would spend it on high flow exhaust, CAI, tuning, higher fuel pressures.
Just my 2 cents from the knowledge I gained working in an engine machine shop.
The combustion chamber is now 53cc versus OEM 51cc, which means a decrease in compression.
I wouldn't by these heads unless you plan on using forced induction (supercharger). If you aren't supercharging it, then I would only get the heads if you plan on using a bigger cam, headers, high flow exhaust, CAI, and a tune.
With the larger combustion chamber you will want to probably supercharge it and that is probably the intent here. Not sure how much that will drop compression. I don't think it would be very much.
In the end, $1000 is a lot of money for very minimal difference IMO. I could think of spending $1000 and get more performance out of the motor in other areas.
Now if you plan on doing a ton of work where the ported heads could be beneficial then go for it.
Back in the push rod days with the small block 350 chevy, 302 Fords, and big block Chevy and Fords, porting and polishing heads coupled with larger intake/exhaust valves was a hot upgrade. But there was a lot of flow to be gained in those cylinder heads, where there was 1 intake and 1 exhaust valve as compared to what can be gained in today's cylinder heads.
But then these upgrades would be proved unfruitful if you didn't get a high flow intake and bump up the carb sizes that could get more air and fuel to the higher flowing heads.
Cylinder heads these days flow a lot already with 3V and 4V cylinder heads. Like the old V8 small block days, the porting of heads will need more air and fuel getting to the better flowing heads in order to realize the potential of the newly ported heads. In today's motors that means forced induction, CAI, higher pressure fuel systems, engine tunes, high flow exhaust, etc.
Unless you plan on doing all that, I wouldn't spend my money on these heads. I would spend it on high flow exhaust, CAI, tuning, higher fuel pressures.
Just my 2 cents from the knowledge I gained working in an engine machine shop.
07-31-2017, 04:21 PM
#17
Moderator
