Precision EFI Stage 1 a must - HCS Snowmobile Forums

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Old 01-12-2020, 12:26 AM   #1 (permalink)
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Default Precision EFI Stage 1 a must

2018 800 ctec first ride this weekend. Shitty idle, gone, top end RPM issues, gone, and if that wasn't enough i was able to get by an 850 Doo on the lake today. Must have for these sleds IMO.
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Old 01-12-2020, 12:42 AM   #2 (permalink)
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Any clutching done to your sled?
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Old 01-12-2020, 12:55 AM   #3 (permalink)
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nope just the flash. Blew me away that i took that 850. Neck and neck 2000 feet and i took him. Very happy. Sled ran like shit before the Precision flash....obviously Cat is too held up by EPA to come up with anything close....
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Old 01-12-2020, 01:07 AM   #4 (permalink)
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Being you were probably over revving like crazy you would gain a ton more with weights and a stiffer secondary
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Old 01-12-2020, 01:15 AM   #5 (permalink)
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The 129s must get away with the 155/220 secondary spring. They slip in the 137s when studded. Probably need a 160/235 or 155/240
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Old 01-12-2020, 02:36 AM   #6 (permalink)
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Quote:
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Being you were probably over revving like crazy you would gain a ton more with weights and a stiffer secondary
Lol nope. These engines like 7900-8100.
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Old 01-12-2020, 03:04 AM   #7 (permalink)
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Quote:
Originally Posted by krank600 View Post
Quote:
Originally Posted by Procross225 View Post
Being you were probably over revving like crazy you would gain a ton more with weights and a stiffer secondary
Lol nope. These engines like 7900-8100.
That flash must have not done anything. My stock 19 pulls 8250 with stock clutching in brake in mode
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Old 01-12-2020, 03:34 AM   #8 (permalink)
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Quote:
Originally Posted by krank600 View Post
Quote:
Originally Posted by Procross225 View Post
Being you were probably over revving like crazy you would gain a ton more with weights and a stiffer secondary
Lol nope. These engines like 7900-8100.
Very surprised your engine is only pulling that rpm
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Old 01-12-2020, 08:26 AM   #9 (permalink)
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I've been waiting to do this as I haven't had the idle recall/reflash done. Did Precision come out with the new version of this flash?
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Old 01-12-2020, 10:54 AM   #10 (permalink)
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I thought the Precision flash was only supposed to pull 7800-7900 with correct clutching and did not like anything past 8000 ?
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