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96 Cobra losing water and steam out of the tail pipes
- Thread starter Nick1996
- Start date
I was thinking about having the exhaust Port opened up and then basically just having them cleaned up we were going to put stud bolt on to thanks for the other advice the whole discussion on the C and B heads reminds me a lot of the trick flow dilemma some guys were making tons of Power with the small Port High Velocity heads and other people were making tons of Power with a big Port heads it just depends on your application I want to supercharge this engine I'm going go to rebuild the bottom end in in future
Keep in mind, 4.6's lack displacement naturally, so they need port velocity to scavenge,
Increasing exhaust port opening, will lessen velocity, harming performance. If you have good velocity on intake (ie force induction), then porting exhaust makes sense.
As far as b vs c head, c's flow better by tumble design and port dimensions. Catch is, b cams are better than c cams. So, put b cams, in c heads. (Intake cams only, exhaust is the same cam)
To do c heads, you'll need either c lower and upper intake, or, an adapter plate that will accept c lower intake mated to b upper intake. That is the best method to go (As opposed to c lower and c upper intake). C lower is required due to c head size.
Depending on which upper you go with, you'll need to reposition your crossover coolant tube , or get one off 99/01 cobra.
There are several threads listed above which give detail instructions, and total parts list. I very much want to do a c head swap, but this being my dd, makes it difficult.
Increasing exhaust port opening, will lessen velocity, harming performance. If you have good velocity on intake (ie force induction), then porting exhaust makes sense.
As far as b vs c head, c's flow better by tumble design and port dimensions. Catch is, b cams are better than c cams. So, put b cams, in c heads. (Intake cams only, exhaust is the same cam)
To do c heads, you'll need either c lower and upper intake, or, an adapter plate that will accept c lower intake mated to b upper intake. That is the best method to go (As opposed to c lower and c upper intake). C lower is required due to c head size.
Depending on which upper you go with, you'll need to reposition your crossover coolant tube , or get one off 99/01 cobra.
There are several threads listed above which give detail instructions, and total parts list. I very much want to do a c head swap, but this being my dd, makes it difficult.
I was thinking about having the exhaust Port opened up and then basically just having them cleaned up we were going to put stud bolt on to thanks for the other advice the whole discussion on the C and B heads reminds me a lot of the trick flow dilemma some guys were making tons of Power with the small Port High Velocity heads and other people were making tons of Power with a big Port heads it just depends on your application I want to supercharge this engine I'm going go to rebuild the bottom end in in future
Its actually nothing like that at all. C heads are better in every application, with the only exception being if you are John Mihovetz and are spinning your motor to 10,000 rpm with 60+ pounds of boost.
Okay so I am open to the idea of doing a c head swap I need a parts list linkIts actually nothing like that at all. C heads are better in every application, with the only exception being if you are John Mihovetz and are spinning your motor to 10,000 rpm with 60+ pounds of boost.
Everybody is really pushing the C heads on here how about a parts link what kind of work needs to be done to the C heads from some of the research I've done it looks like the power gains are minimal how much does it cost to do the swap and would I be better suited to just buy a supercharger and run the B heads
30rwhp is what I've heard, cost $1500-2000 depending on parts cost (varies by region and salvage yard), and how much work you do yourself vs shop.
That would be the most expensive 30 horsepower gain in the history of cars30rwhp is what I've heard, cost $1500-2000 depending on parts cost (varies by region and salvage yard), and how much work you do yourself vs shop.
But... that is at the wheels.That would be the most expensive 30 horsepower gain in the history of cars
It is also a supporting mod. Meaning if you have bolt on' s, numbers could be exponentially more.
Problem with 4.6 4V (96-98), is there are not a lot of supporting heads and cams (N/A) to choose from.
Therefore c heads with b cams is best optiion
That would be the most expensive 30 horsepower gain in the history of cars
Not when 90% of those expenses are going to be incurred regardless of which heads he puts on.
If you have to pull your heads on a B head car, its really hard to justify not doing a C Head swap.
Not when 90% of those expenses are going to be incurred regardless of which heads he puts on.
If you have to pull your heads on a B head car, its really hard to justify not doing a C Head swap.
I'm looking at this C head swap the B's have to come off so what do I need to do to put C's on the carNot when 90% of those expenses are going to be incurred regardless of which heads he puts on.
If you have to pull your heads on a B head car, its really hard to justify not doing a C Head swap.
putting some research into this C head swap and what I'm finding so far is I need about $1,000 worth of parts and like I said$1,000 for a 30 horsepower gain doesn't seem like a very good investment to me so let's spend some money on the B heads what should I put in these heads or do to these heads to improve what I already have
See my previous post. End threadputting some research into this C head swap and what I'm finding so far is I need about $1,000 worth of parts and like I said$1,000 for a 30 horsepower gain doesn't seem like a very good investment to me so let's spend some money on the B heads what should I put in these heads or do to these heads to improve what I already have
so let's spend some money on the B heads what should I put in these heads or do to these heads to improve what I already have
Absolutely nothing. You should do nothing with your B-heads. Have the machine shop get them straight, clean them up, replace the valve seals, and throw them back on because no money you put into them will yield any improvement.
End thread
Yep.
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