comp cams polymer box intakes

I had one back when they were sold under the Hartman name. For the $300 they want for it you'd be farther ahead with a Cobra or Explorer intake.

I have one on my 408w.

For the price it is a great high rpm manifold

I am not sure how well it will hold up to boost though?
The sealing areas are fairly small.

I'd like to hear what others think.

jason

MadDAWG said:

I had one back when they were sold under the Hartman name. For the $300 they want for it you'd be farther ahead with a Cobra or Explorer intake.

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How would you be farther ahead with a cobra/explorer when the intake is on vristangs 408?

How high does this thing make the powerband? I can get one locally for cheap. I thought about picking it up along with a bbk 75mm throttle body.

Don't get one with boost. I know that for a fact. For the money just get an Explorer or a used intake off of Ebay.

Only reason I was even considering it was because I can get one used and cheap locally. But if it isn't worth it I'll skip it.

MustangGT95 said:

How high does this thing make the powerband? I can get one locally for cheap. I thought about picking it up along with a bbk 75mm throttle body.

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Here are my comments that I had made in another thread...
http://forums.stangnet.com/showthread.php?t=632123

I first purchased my Comp Polymer upper when I still had the stock 302. Mods at the time were; Cobra Lwr, 24lb Inj, 70mm TB, 73mm C&L, and 1.7RR. I had 3.27 gears, and stock virgin heads. Before installing the comp cam intake I had the virgin Cobra upper in place, so I can provide a comparison between these 2 setups.

The comp cam upper did sacrifice some bottom end, until about 3,500rpm. Above 3,500 the car was much more powerful. Never had it dyno'd just SOTP. The bad part was the low end loss, which was almost unbearable. Getting moving from a stop was embarrassing. I was actually unhappy with the comp cam upper, until I put in the 351w.

With my current setup, the comp upper is ideal, as it allows the Lightning Lwr to breathe at full capacity.
I would not recommend using this intake with boost however. I have had some trouble getting it to seal, and have found that silicone is a must between the upper and lower half of the Comp intake. I think boost would just blow this thing apart. When I move up to boost on this car I will be swapping the Comp upper for a TrickFlow, or other Al upper.

My recommendations for using this intake are...
Pair it with a Cobra/GT-40 lower, which should flow a little better than stock.
Swap gears for 3.55 or bigger to help diminish the low end power loss.
Any change made to the heads and cam to improve airflow will greatly enhance the upper end gains.
These intakes are great for h/c/i strokers, whether 302 or Windsor based. The added flow of the Comp upper will come in handy with the extra cubic inches. The loss of low end with a stroker motor will not be as noticeable.

Also, plan ahead.
Don't buy an intake that you will outgrow fairly soon.

Hope this helps
jason

Thanks for the input. I already have low end loss from my camshaft. My car has nothing before 2400 or so. It sucks. I think my next mod will be 4.10's. Hopefully I will get some low end back.

I have had a couple other sports cars but I have never had gears swapped. I hear it is very nice but I don't know from experience.

MustangGT95 said:

Thanks for the input. I already have low end loss from my camshaft. My car has nothing before 2400 or so. It sucks. I think my next mod will be 4.10's. Hopefully I will get some low end back.

I have had a couple other sports cars but I have never had gears swapped. I hear it is very nice but I don't know from experience.

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Gears are very nice.
I had 2.73's before the 3.27 rear end went in. It was noticeable.