anyone running this cam?

foxbodydave

foxbodydave

Club Member
its a hyd flat tappet. its the comp xe284h.

.541/.544 lift and 240*/246* duration at .050.

if you are running it how do you like it?
 
sorry..lol its gonna be a 306 with ported gt40 heads.
10:1 comp
1 3/4 longtubes.
c4 trans with 4k stall (or what would be better?)
3.73 gears
performer rpm intake
650 proform
 
the intake is a dual plane makes power to 6500 just like the cam. the cam is on a 110*lca not sure of the icl its not listed
 
foxbodydave said:
the intake is a dual plane makes power to 6500 just like the cam. the cam is on a 110*lca not sure of the icl its not listed
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doesn;t sound like a bad choice. Just make sure the exhuast system is really good and free flowing and don;t use flowmaster mufflers or other baffled muffler designs.
 
i was planning on running 1 3/4 longtubes to a 3 inch prochamber. even if i ran 3 inch flows would it still choke it down too much? i really want to keep it kind of quiet.
 
foxbodydave said:
i was planning on running 1 3/4 longtubes to a 3 inch prochamber. even if i ran 3 inch flows would it still choke it down too much? i really want to keep it kind of quiet.
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That much overlap with that small a CI is going to be very exhuast sensistive.
 
Fryguy302 said:
Why don't you like flowmasters?
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Long story. If you can;t tune the exhuast system to the proper resonant frequency they hurt power more then help and most cars don't have enough wheel base to get the tunning ranges we need. Now the single chambers are easier to work with but who want to listen to those things in a street car ?

My issue is that those mufflers are very hit and miss. Sometimes they work and the world is good. Other time with a small ci motor with a long camshaft and a good amount of overlap they kill the motor.Its also a safe bet a through flow muffler will make power.

All this aside properly configured flowmaster 2-3 chamber mufflers in a properly attenuated exhuast system can actually make more power then a straight through design. You just not likely to see it on a wild card combo like the on in this thread.
 
Sean said:
Long story. If you can;t tune the exhuast system to the proper resonant frequency they hurt power more then help and most cars don't have enough wheel base to get the tunning ranges we need. Now the single chambers are easier to work with but who want to listen to those things in a street car ?

My issue is that those mufflers are very hit and miss. Sometimes they work and the world is good. Other time with a small ci motor with a long camshaft and a good amount of overlap they kill the motor.Its also a safe bet a through flow muffler will make power.

All this aside properly configured flowmaster 2-3 chamber mufflers in a properly attenuated exhuast system can actually make more power then a straight through design. You just not likely to see it on a wild card combo like the on in this thread.
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i got 3 inch one chambers flowmasters on my street car, whats wrong with them?

 
again its complicated. sometimes you get lucky and they work and other times they don't. also the signle chambers are the most forgiving of tunning of them all.

swap them out with a different set of muffler and see IF they are holding you back.

How flowmasters interact with cam timming header primarys and induction tunning is a complicated subject one which I couldn;t begin to cover here.

Sometimes they work and sometimes they don't. but a straight through will always work.

I will say this. A properly attenuated flowmaster muffler can actually make more power thne a straight through. Its just rare you see it happen.
Teef racing said:
i got 3 inch one chambers flowmasters on my street car, whats wrong with them?

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Sean said:
again its complicated. sometimes you get lucky and they work and other times they don't. also the signle chambers are the most forgiving of tunning of them all.

swap them out with a different set of muffler and see IF they are holding you back.

How flowmasters interact with cam timming header primarys and induction tunning is a complicated subject one which I couldn;t begin to cover here.

Sometimes they work and sometimes they don't. but a straight through will always work.

I will say this. A properly attenuated flowmaster muffler can actually make more power thne a straight through. Its just rare you see it happen.
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Mufflers matter much less than the header primary length or secondary down pipe length when doing charge tuning. You are much better off tuning the primary length on the headers and/or the secondary down pipe length into the first junction than tuning reflection with mufflers. IVC has more to do with it than LSA. Flowmasters are less effective due to back pressure - they have a high pressure drop.
 
90blknotch said:
Mufflers matter much less than the header primary length or secondary down pipe length when doing charge tuning. You are much better off tuning the primary length on the headers and/or the secondary down pipe length into the first junction than tuning reflection with mufflers. IVC has more to do with it than LSA. Flowmasters are less effective due to back pressure - they have a high pressure drop.
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You can say that until you've taken a set of flowmasters off a car and seen it pickup 30-50 hp at the tire.
 
Sean said:
You can say that until you've taken a set of flowmasters off a car and seen it pickup 30-50 hp at the tire.
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I believe it - espessily if its a high horsepower car. The flowmasters suck the extra power due to backpressure not some tuning effect. There is a direct correlation between power loss and backpressure!
 
90blknotch said:
I believe it - espessily if its a high horsepower car. The flowmasters suck the extra power due to backpressure not some tuning effect. There is a direct correlation between power loss and backpressure!
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that where things get interesting with a reflection design muffler. If you attenuate the muffler correctly "nearly impossiable with most floor pan layouts" the flowmaster can actually become a scavenging device.
 
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