ls7 and meth
Thread Starter
Instructor
Joined: Jan 2017
Posts: 205
Likes: 6
ls7 and meth
Anyone with a stock ls7 running a vortech v3-si unit with meth injection? How big were your gains?
Planning on doing meth injection possibly 100% but just wanted to know how much of a horse power gain should I expect. looking to go from 4" down to a 3.8 pulley.
Planning on doing meth injection possibly 100% but just wanted to know how much of a horse power gain should I expect. looking to go from 4" down to a 3.8 pulley.
Instructor
Joined: Mar 2016
Posts: 206
Likes: 17
From: BOISE IDAHO
Tech, did you run 100% ? I've got an alky kit I'm about to install, a smaller pulley (going from 3.8 to 3.4) also have headers going in with borla atak.
Im having trouble deciding on 100% meth or 50/50
Im having trouble deciding on 100% meth or 50/50
Team Owner
Joined: Nov 2007
Posts: 24,035
Likes: 2,341
From: Gilbert AZ
Depends on way too many things, but gains from 20-60rwhp are reasonable. Depends how octane limited you are, how aggressive the tune is, how bad of gas you are starting with, etc.
A pulley drop alone will see ~40+rwhp gains. With meth and pulley you can possibly see 80+rwhp.
A pulley drop alone will see ~40+rwhp gains. With meth and pulley you can possibly see 80+rwhp.
Instructor
Joined: Jan 2013
Posts: 124
Likes: 6
on my ls3 v3 Si i picked up 60rwhp by going from a 3.6 to 3.4 pulley and going from 10gph 75meth/25 water to 20gph and 100% meth. Id say adding headers, a step more pulley and meth you could easily see 80-100rwhp
good luck man and i can't wait to hear the results
good luck man and i can't wait to hear the results
Pro
Joined: Aug 2010
Posts: 629
Likes: 24
From: Manassas VA
Lots of variables but keeping the same boost/pulley I would expect to see 30-50 rwhp depending on the tuner/dyno. I ran 100% meth on my car but after seeing a meth pump take a dump in mexico and cost someone their motor I ditched pump/meth and went to straight E85 with my current set up.
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