LS Build: In Progress
05-15-2019 | 06:13 PM
#381
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From: San Tan Valley AZ
Yeh, Supertrapp had a marine SSMuffler years back. There used to be a bunch of old Fountain 10 and 12Meters with them back in the day around here.
i tried a set and the noise reduction wasn't good enough for our tight DB rules.
Believe it or not, the simple Drew Sidewinder tips/mufflers (they use air pistons for slight resistance on the flaps)worked better for idle.low speeds (where it matters more)
Here is the drew's:
i tried a set and the noise reduction wasn't good enough for our tight DB rules.
Believe it or not, the simple Drew Sidewinder tips/mufflers (they use air pistons for slight resistance on the flaps)worked better for idle.low speeds (where it matters more)
Here is the drew's:
05-15-2019 | 07:46 PM
#382
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From: On A Dirt Floor
Here and there some will be for sale on OSO and sit around forever until the seller has to sell them cheap. I dunno' why.
They take out some bark of louder wet exhaust at start and low speeds...I doubt that effective with dry.
They take out some bark of louder wet exhaust at start and low speeds...I doubt that effective with dry.
05-15-2019 | 10:06 PM
#384
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From: San Tan Valley AZ
05-19-2019 | 01:03 AM
#385
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From: San Tan Valley AZ
Progress report. Still ugly. Waiting on carbs from pro systems. Down sized. Waiting on one intake from trick flow. Both should be in by weds. Still gotta polish pipes 
Last edited by mggdoors; 05-19-2019 at 03:11 AM.
05-19-2019 | 11:49 AM
#387
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From: San Tan Valley AZ
05-27-2019 | 02:41 PM
#388
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From: San Tan Valley AZ
Reversion is present. Both banks 3rd cylinder back from the front is the worst. Drivers engine(the one that wasnt dyno’d) has weird chirp at idle. Goes away with rpm. Emitting sound from rear starter side. Sounds like starterbendix failing to engage or as Ive seen in past a lifter wheel taking a ****. Replacing starter today. Reversion debating going dry or just buying lightnings. Updates to come.
05-28-2019 | 10:48 AM
#390
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From: San Tan Valley AZ
Ok. So played with engines on the hose yesterday. Reduced idle timing from 20 to 14 and opened throttle blades slightly, mostly the secondary. Reversion seems to have vanished idling at 900 for 5 minutes. A few other things. I have exhaust leak at all risers. Having these milled. I can also still add the ggb inserts to help reversion as well. Only concerning factor now is the amount of heat I am seeing at the manifolds and risers. Water flow is good out the tail pipes. How hot is too hot? I would guess we were in the 150-170 degree range just idling. Am I flowing water too fast out the tails?
