fuel required for 350 HP?
03-09-2011, 03:40 PM
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fuel required for 350 HP? an engine using 350 HP nos with with 14.0 static ratio compresion. what'd be the proper fuel for this??
2 pistons cracked and wanna discard it was about the fuel
2 pistons cracked and wanna discard it was about the fuel
03-09-2011, 04:01 PM
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If your looking for more help than that sir, I would like much more info. What are we working on/with?
Graham @ N20
03-09-2011, 07:30 PM
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thank you sir, here more details, block dart chevy sb 434, carburetor holley progressive 950, cam LS:110 dur @.050 int: 248 exh:254 ratio compression 12.9:1, 350 HP Nos fogger using progressive, runner intake 221cc runner exh 75cc, we were using c-12, one piston got a hole, timing beginning 40° without nos then a retard of 14° at 100% open nos, the retard was 10° first gear, 4° retard at second gear, transmission powerglide, sea level 1540 meters
03-09-2011, 07:31 PM
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thank you sir, here more details, block dart chevy sb 434, carburetor holley progressive 950, cam LS:110 dur @.050 int: 248 exh:254 ratio compression 12.9:1, 350 HP Nos fogger using progressive, runner intake 221cc runner exh 75cc, we were using c-12, one piston got a hole, timing beginning 40° without nos then a retard of 14° at 100% open nos, the retard was 10° first gear, 4° retard at second gear, transmission powerglide, sea level 1540 meters
03-09-2011, 07:50 PM
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thank you sir, here more details, block dart chevy sb 434, carburetor holley progressive 950, cam LS:110 dur @.050 int: 248 exh:254 ratio compression 12.9:1, 350 HP Nos fogger using progressive, runner intake 221cc runner exh 75cc, we were using c-12, one piston got a hole, timing beginning 40° without nos then a retard of 14° at 100% open nos, the retard was 10° first gear, 4° retard at second gear, transmission powerglide, sea level 1540 meters
thank you sir, here more details, block dart chevy sb 434, carburetor holley progressive 950, cam LS:110 dur @.050 int: 248 exh:254 ratio compression 12.9:1, 350 HP Nos fogger using progressive, runner intake 221cc runner exh 75cc, we were using c-12, one piston got a hole, timing beginning 40° without nos then a retard of 14° at 100% open nos, the retard was 10° first gear, 4° retard at second gear, transmission powerglide, sea level 1540 meters
Who is in charge of tuning the setup?
Graham @ N20
03-09-2011, 09:12 PM
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well, Nos aftermark recommends to retard 2° per each 50HP starting with 40° because we're 1540 meter sea level, then at finishing it is at 26 degrees. we're considering to use an air/fuel ratio meter.
what do you think?
03-09-2011, 09:57 PM
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Pick up the pieces. Get the motor back together. Dial it in Razor sharp on motor. Then we can talk nitrous tuning.
At the shot sizes your referring to, yes, you need a wideband. But is just another tuning tool. Plug reading saves motors.
Short answer, bad information and moving too fast on the tuneup.
Graham @ N20
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03-10-2011, 05:32 PM
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Start completely over with tuning. The traditional rules are guidelines for small shots and much less aggressive motors. Trying to tune a 350hp hit on 14.0 compression off of those will end up with hurt parts every time.
Pick up the pieces. Get the motor back together. Dial it in Razor sharp on motor. Then we can talk nitrous tuning.
At the shot sizes your referring to, yes, you need a wideband. But is just another tuning tool. Plug reading saves motors.
Short answer, bad information and moving too fast on the tuneup.
Graham @ N20
Pick up the pieces. Get the motor back together. Dial it in Razor sharp on motor. Then we can talk nitrous tuning.
At the shot sizes your referring to, yes, you need a wideband. But is just another tuning tool. Plug reading saves motors.
Short answer, bad information and moving too fast on the tuneup.
Graham @ N20
ok, i almost done with all the pieces, so let's put it in this way, this time ratio compression will be around 12.8 and i'm using the same components, what am i suppost to do now?
03-10-2011, 05:33 PM
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03-15-2011, 03:23 PM
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Sounds like way too much timing for that big a shot, also what kind of engine internals are you working with? It will take a top notch setup with spot on tune to hold up to that kind of stress.
03-15-2011, 06:23 PM
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i dont think going with the, "general" if you'd even call it that, rules. With a shot that size your engine def needs some special attention in the form of tuning
Last edited by John H; 03-15-2011 at 06:31 PM.
