Need some help with motor problems (Intake Runner size, ring gap, etc)
Need some help with motor problems (Intake Runner size, ring gap, etc) It's gettin' cold...So the motor is coming out again! I was pretty disappointed this season so I'm going to change my setup and I need some opinions and thoughts.
The current setup is an LS1 block, stock crank, Diamond pistons (flat-top -2 cc with .020 top and .016 bottom rings for a 200 shot of N2O), H-beam rods, stock stroke, stock bore, .040" head gaskets, stock rockers/lifters, Chromemoly push-rods (stock 7.4" length), TSP MS4 cam (111LSA) with PRC dual-springs and titanium retainers, LS6 manifold with stock 75mm throttle body, 255l pump, 42# injectors, LS6 heads polished with a 59cc combustion chamber. My best time on this setup was an 11.8 with a DA of 7000 feet. I have a crap load of blow by which I narrowed down to worn valve guides (15k miles on the heads with the stock rockers and MS4 = death to valve guides) Only made 396hp on the dyno
Oh and also...Spraying the 100 speeds the car up while spraying a 200 slows it down. Imagine that. I'm totally stumped on that one! Tried messing with the jets, put on a dedicated fuel system, replaced the TNT solenoids with larger NOS ones, used 1 nozzle instead of 2 and still nothing. Help!
I'm really planning on getting some roller rockers to keep the valve guides from wearing, taking the heads to a 215cc intake runner, buying a FAST 92/92 setup and pairing those with a 100mm MAF. I'm hoping this will correct my sluggish times and low dyno numbers but...
Why else am I not making power?!
Do I need different length push-rods since I cut the heads?
Should a go to 4.0 bore instead of the stock 3.905 I have?
Ring gap issues?
Would a 1.8 rocker ratio put me over the edge with a .700+ calculated lift?
How about a 225cc runner?
Can it all be blamed on not enough flow due to stock TB, intake and the blow-by from the valve guides?
ANY thoughts, suggestions would be helpful!!! Thanks in advance
The current setup is an LS1 block, stock crank, Diamond pistons (flat-top -2 cc with .020 top and .016 bottom rings for a 200 shot of N2O), H-beam rods, stock stroke, stock bore, .040" head gaskets, stock rockers/lifters, Chromemoly push-rods (stock 7.4" length), TSP MS4 cam (111LSA) with PRC dual-springs and titanium retainers, LS6 manifold with stock 75mm throttle body, 255l pump, 42# injectors, LS6 heads polished with a 59cc combustion chamber. My best time on this setup was an 11.8 with a DA of 7000 feet. I have a crap load of blow by which I narrowed down to worn valve guides (15k miles on the heads with the stock rockers and MS4 = death to valve guides) Only made 396hp on the dyno
Oh and also...Spraying the 100 speeds the car up while spraying a 200 slows it down. Imagine that. I'm totally stumped on that one! Tried messing with the jets, put on a dedicated fuel system, replaced the TNT solenoids with larger NOS ones, used 1 nozzle instead of 2 and still nothing. Help!
I'm really planning on getting some roller rockers to keep the valve guides from wearing, taking the heads to a 215cc intake runner, buying a FAST 92/92 setup and pairing those with a 100mm MAF. I'm hoping this will correct my sluggish times and low dyno numbers but...
Why else am I not making power?!
Do I need different length push-rods since I cut the heads?
Should a go to 4.0 bore instead of the stock 3.905 I have?
Ring gap issues?
Would a 1.8 rocker ratio put me over the edge with a .700+ calculated lift?
How about a 225cc runner?
Can it all be blamed on not enough flow due to stock TB, intake and the blow-by from the valve guides?
ANY thoughts, suggestions would be helpful!!! Thanks in advance
