INTERNAL ENGINE MODIFICATIONS Valvetrain |Heads | Strokers | Design | Assembly

Going to all motor camshaft

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Old 04-26-2009, 02:46 AM
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Originally Posted by skeet
stay with full exhaust, i lost power with cut outs



do you have 3" exhaust ?
I would think a 408 would be fine with open exhaust. What kind of exhaust do you have? I have a pair a flowmasters which I know are not very good for HP so my open exhaust nets me .2 off my time on avarge.
Old 04-26-2009, 08:59 AM
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Originally Posted by skeet
stay with full exhaust, i lost power with cut outs



do you have 3" exhaust ?
Yeah I have two 3" tailpipes in the stock location.

Originally Posted by Dark Halo
how are those heads with the 408? Are you running dished pistons? Just wondering what kind of compression you are running?
The heads are doing great but I'm sure there are better. I am running 12cc dished pistons w 64cc heads which brings me to 11.0 compression.
Old 04-26-2009, 09:04 AM
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Originally Posted by Dark Halo
I would think a 408 would be fine with open exhaust. What kind of exhaust do you have? I have a pair a flowmasters which I know are not very good for HP so my open exhaust nets me .2 off my time on avarge.
I have two magnaflow 3 in 3 out. The cutouts make me gain about a tenth but they make my truck sound like a race car.
Old 04-26-2009, 09:14 AM
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Originally Posted by tarinitup
I have two magnaflow 3 in 3 out. The cutouts make me gain about a tenth but they make my truck sound like a race car.
race truck
Old 04-26-2009, 10:37 AM
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Originally Posted by dirt track racer 81
race truck
lol
Old 04-26-2009, 11:19 AM
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Originally Posted by Dark Halo
I would think a 408 would be fine with open exhaust. What kind of exhaust do you have? I have a pair a flowmasters which I know are not very good for HP so my open exhaust nets me .2 off my time on avarge.

when i had the ecsb and running 11's i had a dual 3" into a crossover mangaflow dumpedl, i had 2 cut outs which netted me a lost in horse power so i removed them. now i have the drive line in a rcsb which feels very strong but hadnt dynoed it, but the exhaust is now HEADERS are 1 7/8 into 2" primaries into 3" collectors into 3" Y pipe into a XR-1 BORLA.


hey T, i hope the cam works well for ya!!!
Old 04-26-2009, 06:39 PM
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Originally Posted by tarinitup
I like the way your directport looks on the sig. Wan't to trade me intakes plus cash for yours?
Sure, your intake and 15,000 and i'll even throw in the rest of the truck with it
Old 04-27-2009, 08:41 PM
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Originally Posted by skeet
stay with full exhaust, i lost power with cut outs
i dont think this has been proven, AT THE TRACK... dyno #'s are good but they dont give e/t results........ people on here prove it all the time @ the track.... it would had been nice to see your truck with cutouts to compare...
Old 04-27-2009, 08:42 PM
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by the way "tarinitup"... i think that will be a very good n/a cam for your setup!
Old 05-10-2009, 11:03 PM
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Well the new cam is installed and I love it. Street manners improved alot and it has more low end torque than I need. It burns the 24's like nothing so I cant imagine what it would do to a shorter tire. I noticed the engine doesn't rev up as quickly as with the old cam and my gas pedal feels harder (if that makes any sense) but part throttle has greater acceleration and top end is about the same. I will post idle vid later.

Last edited by tarinitup; 05-10-2009 at 11:08 PM. Reason: mispelled word


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