BMW M3 Forum
BMW M3 Forum BMW M3 Gallery BMW M3 Reviews BMW M3 Social Groups BMW M3 Chat M3Forum Sponsors >>
Loading


Mobile M3forum
Go Back   BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X) > M3Forum Garage > Forced Induction (F/I)
Tire Rack Buy Winter Tires Now!
Not a member? Register Now!
Register Gallery All Albums Garage Search Today's Posts Mark Forums Read Calendar FAQ

Forced Induction (F/I) Discuss the ever growing F/I options here!


Reply
 
Thread Tools Display Modes
Old Fri, Oct-27-2017, 12:07:40 PM   #1
7to3_enthusiast
13B & S54 Fanatic
 
7to3_enthusiast's Avatar
 
Join Date: Sep 2011
Posts: 45
Reputation: 0 7to3_enthusiast is on a distinguished road

United States




Default Meth Addicts and Compression Drop

Hey Guys,

I'm running a stage 2(.5?) maxPSI kit with a PT-6870 and getting ready for a grudge race next spring against a friend of mine. I wanted to get people's personal experience from two power adders.

1. Meth kits: I hear mixed stories with meth kits on the s54 FI world, they work great on my rotaries but obviously apples to oranges. What did you like, not like, and what problems occurred from running meth?


2. Dropping compression: I'd rather not build the bottom end just yet and looking into installing a thicker head gasket but once again it doesn't seem like there's much info out there on that. I have one or two shops that are experienced in other bmw platforms but want to hear more info on people's experiences from dropping compression with a head gasket. Were knock values affected? Any issues with installing them, or sealing? etc?


I would appreciate any info or advice. This guy has been running his mouth for awhile now and although I know my current race gas mode is plenty to beat him, he's talked enough trash that I'm looking to humiliate him. Help me out guys


~Anthony
__________________


02 M3: MaximumPSI Stage 2; 6870; 3.5" BW exhaust
Jump to top 7to3_enthusiast is offline   Reply With Quote
Sponsored Links
Register now and remove these ads
Old Fri, Oct-27-2017, 02:23:15 PM   #2
dtmpowerjc
dtmpowerjc
 
dtmpowerjc's Avatar
 
Join Date: Nov 2010
Posts: 1,035
Reputation: 0 dtmpowerjc is on a distinguished road
Location: miami

United States




Default Re: Meth Addicts and Compression Drop

Meth will give you a nice boost. Snow performance


Sent from my iPhone using Tapatalk Pro
Jump to top dtmpowerjc is offline   Reply With Quote
Old Sat, Oct-28-2017, 05:42:59 PM   #3
pbonsalb
Registered User
 
Join Date: Jun 2005
Posts: 3,382
Reputation: 0 pbonsalb is on a distinguished road





Default Re: Meth Addicts and Compression Drop

Years ago HPF made about 700 rwhp with meth but they used an aftermarket ECU and tuned for it. Untuned, it is a good safety aid but running a race gas or E85 tune might be better.

Years ago, VF claimed it attempted to drop CR with a thicker HG on an S54 but said the timing chain was too tight. It's also more work to do a HG on an S54 than an S52 (thicker HG common on FI S52).

I don't have E85 or the ability to easily change tunes so I run 93 pump with direct port meth as a safety aid and have lower CR -- first through a thicker HG now through a built motor but this is on an S52.
Jump to top pbonsalb is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump



All times are GMT. The time now is 11:04:10 AM.


Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
M3Forum.com and M3forum.net is in no way sponsored, endorsed or affiliated by or with BMW NA / BMW AG or any of it's subsidiaries or vendors.
BMW and M3 (E90 M3 | E92 M3 | E93 M3 | E46 M3 | E36 M3 | E30 M3) are registered trademarks of BMW AG.
M3Forum Terms of Service
Copyright 1999-2017 M3Forum.com
Discussing Meth Addicts and Compression Drop in the Forced Induction (F/I) Forum - Discuss the ever growing F/I options here! at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)