LTX and LSXPutting LT1's, LS1's, and their variants into Third Gens is becoming more popular. This board is for those who are doing and have done the swaps so they can discuss all of their technical aspects, including repairs, swap info, and performance upgrades.
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exhaust question - let me pick your brains for a moment
I am picking up a set of the SSW long tubes for the LSX swap with 3" collectors. Here is my dilemma:
A guy that wrecked his LSX swapped 3rd gen is parting the car out. He had these same headers but the exhaust he was running was a 2.5" x-pipe, ceramic coated, dual (gutted) cats, into a ypipe right at the rear end into a Borla muffler.
What I was contemplating was just buying the x-pipe with the cats and letting him keep the y-junction so I could run duals all the way back. Here's my main concern: Is running a 3" collector into a 2.5" x-pipe going to be taking a step backwards in a negative way? What I'm concerned about is losing the gains I would normally see with these headers because the exhaust is going down to a smaller radius.
Let me hear what you all have to say and then I'll decide. What I was going to do is run the duals all the way back into a knock-off GMMG style dual crimped muffler setup.
__________________ 2nd Place Modified Camaro - ThirdGen Fest '11 LSX / T56 combo, 420rwhp 407 ft./lbs. custom Ford 8.8" with 9" axle tubes, 4.10's and Ford Racing Cobra diff, Moser axles, LS1 brake swap front and rear, Hawks 1 3/4" longtubes, forged internals, TSP MS4, LS6 intake, Spohn LCA's/torque arm/cross member/k member/subframe connectors, Alston subframe connectors, Hotchkis springs, poly motor/trans mounts & sway bar bushings/end links, Memphis Audio / Pioneer audio system, etc etc et
Re: exhaust question - let me pick your brains for a moment
I would suggest just running a y pipe. IMO the hassle of duals on these cars just isn't worth it. Plus they won't make much over a properly designed y pipe.
Re: exhaust question - let me pick your brains for a moment
Quote:
Originally Posted by 1bdbrd
I would suggest just running a y pipe. IMO the hassle of duals on these cars just isn't worth it. Plus they won't make much over a properly designed y pipe.
Well the good thing about this guy's x-pipe is it was already fabbed up with mendrel bent tubing on a 3rd gen, and it runs all the way back to the rear end. So I basically would just have to finish it up with a few more feet of piping.
__________________ 2nd Place Modified Camaro - ThirdGen Fest '11 LSX / T56 combo, 420rwhp 407 ft./lbs. custom Ford 8.8" with 9" axle tubes, 4.10's and Ford Racing Cobra diff, Moser axles, LS1 brake swap front and rear, Hawks 1 3/4" longtubes, forged internals, TSP MS4, LS6 intake, Spohn LCA's/torque arm/cross member/k member/subframe connectors, Alston subframe connectors, Hotchkis springs, poly motor/trans mounts & sway bar bushings/end links, Memphis Audio / Pioneer audio system, etc etc et
Re: exhaust question - let me pick your brains for a moment
I am running a 2.5 ypipe, to a 3" non mandle bent tube to a magnaflow and made 450 to the wheel. So I am sure that it will not hurt you as much as you think
Re: exhaust question - let me pick your brains for a moment
don't forget that the further away from the motor the exhaust gasses are, the cooler they are so they compress a bit. so what i'm saying is the step down is not gonna make any real change in power that matters unless this is an all out race car
