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: 2,342
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.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Safety Car
Joined: Jun 2005
Posts: 4,977
Likes: 256
From: St. Louis Missouri
