Cam only dyno #'S....why so low
04-17-2014, 08:16 PM
#21
That's not a whole lot more power than stock, and it doesn't carry the power nearly as high in the RPM range. Those valve-springs MIGHT be barely adequate for that cam, but might be the culprit. I agree with everyone about the Flowmaster, ditch that POS for a decent straight-through design and you will pick up some gains. Even more if you get even the cheapest set of long-tubes.
04-17-2014, 08:59 PM
#22
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Found why it's so low, cut my muffler off, they stuck the inlet on the exit part of the flowmaster. It's hitting a wall in the muffler, pics don't do it justice.
04-17-2014, 11:36 PM
#25
Friends don't let friends run Flowmasters. Get yourself a quality true-dual and long-tube combo using a Borla/Margnaflow/Maxflow/etc muffler, you won't be sorry. I'm running short-cased Jones Maxflow mufflers on my '78 Cutlass swap and I'm impressed by them. Especially for a $35 muffler.
04-24-2014, 08:36 PM
#26
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Going back to the dyno in the mourning with my new tsp LT's, Y and magnaflow. Wish me luck!!
Oh btw this magnaflow, single in single out 3" has some rasp to it. How do u fix that???..
Oh btw this magnaflow, single in single out 3" has some rasp to it. How do u fix that???..
04-25-2014, 03:53 PM
#29
Pretty big jump 40rwhp is pretty significant. Crazy to think someone installed that muffler backwards
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Largest Stocking Distributor of LS-x Engines / CHECK OUT OUR NEW WEBSITE!
COMP - FAST - PACESETTER - DIAMOND RACING - EAGLE SPECIALTY PRODUCTS - CALLIES - COMETIC GASKETS
RAM CLUTCHES - MOSER ENGINEERING - KOOK'S HEADERS - ARP - GM BOLTS AND GASKETS - MSD - NGK
POWERBOND - ASP - AND MORE!
. Now how do I fix this rasp sound? Lol 
04-30-2014, 04:07 PM
#36
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You may want to check out this thread for details or give TSP a call about it: https://ls1tech.com/forums/generation-iii-external-engine/1372646-what-catted-y-pipe-fits-pacesetter-longtubes.html
Magnaflow Hi-Flow Heavy Metal cats part #99659HM. I got both of mine for 169.00 shipped. 3" in and 3" out body size is 4" so only .5 inches bigger all the way around of the inlet/outlet and they support up to a 6.2L. I put 3bolt 3" header flanges on my Pacesetters and on each side of my cats and then on my pipe so I could just bolt them in. That way if for some reason you ever have to replace your cats you won't have to cut your pipe over and over. Just pope the bolts out, put in a new cat with flanges and bolt it back up.
Last edited by John02Hawk; 04-30-2014 at 04:12 PM.
