Boost Options
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Joined: Mar 2016
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From: Indianapolis Indiana
Boost Options
Been throwing around the idea of boosting my 2010 M6 Grand Sport. Car currently has a BTR Stage 3, ported heads, exhaust, and Monster LT1S clutch. I had RPM go through and freshen up the trans last year while I had it out. Car made 490 to he wheels and its been a blast, but I feel like some boost would make it 10x more fun. Pushing towards a centri style blower with low boost. Not looking to break records here and definitely don't want to run meth if I don't have to. Just something to make the car wake up a little. Is anyone currently running a blower with the BTR Stage 3, and if so, what's the rest of your setup? Thanks in advance!
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Joined: Mar 2016
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From: Indianapolis Indiana
Thanks guys. I guess I just don’t like the idea of being limited on how many pulls I can make on a single tank of meth. I’ve contemplated switching to E85, but I’m curious what I could get out of the car just being tuned for 93.
Race Director
Joined: May 2004
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From: Raleigh, NC
St. Jude Donor '15
It lasts a longggg time. I've driven to 1/2 mile events, made 4-5 1/2 mile pulls and driven home and still barely used any. Just depends.. it's not nearly as much of a limiting factor as you'd think though, nothing like keeping a nitrous tank full
Racer
Joined: Jul 2015
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Something like a T trim or S trim will be fine on 93 will make 600-700 HP with ease and pretty much require zero major upgrades or maintenance. You can always pulley your setup harder later on and go with pump & meth or E85.
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Drifting
Joined: Aug 2017
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From: Dayton, OH
I probably lose more meth to evaporation than I use. LOL
The HP I get from having meth injection is great. Even better, it provides inside the combustion chamber cooling when you need it most, when the blower pressure, IAT's and engine rpm are highest.
They guy who built up my car did what you are talking about, initially an A&A kit with the 3.8" pulley. A little while later he changed to a 3.6" pulley and added meth.
A $45 can of M1 meth will last you all season. It is not like NO2. You use very little at a time.
Don't let this discussion dissuade you though. You will be VERY happy with a V-3 Si and the 3.8" pulley!!!!!
The HP I get from having meth injection is great. Even better, it provides inside the combustion chamber cooling when you need it most, when the blower pressure, IAT's and engine rpm are highest.
They guy who built up my car did what you are talking about, initially an A&A kit with the 3.8" pulley. A little while later he changed to a 3.6" pulley and added meth.
A $45 can of M1 meth will last you all season. It is not like NO2. You use very little at a time.
Don't let this discussion dissuade you though. You will be VERY happy with a V-3 Si and the 3.8" pulley!!!!!
Drifting
Joined: Nov 2019
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What kind of weak links are created by doing a blower on an LS3 car? What other considerations are there? It seems to easy/perfect, lol... I have full exhaust and am consdiering an A&A kit as well. Dont want to create a headache though. Want a reliable, easy fast Vette...
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From: Raleigh, NC
St. Jude Donor '15
600rwhp kits are really reliable, there aren't really any major negatives IMO. Clutch won't last forever at that level, tires will go faster, etc. basic stuff like that.
It's more pressure on everything. Higher cylinder pressure, more forces on everything obviously.
Piston ring lands are the weak link IMO.. if it's tuned correctly and you have enough octane they'll survive a really long time. People have done 750-800rwhp for years and beat the crap out of them and they've survived. 550-600rwhp will live for pretty much ever IMO unless the tune is crap or you're just super unlucky. Or both.
It's more pressure on everything. Higher cylinder pressure, more forces on everything obviously.
Piston ring lands are the weak link IMO.. if it's tuned correctly and you have enough octane they'll survive a really long time. People have done 750-800rwhp for years and beat the crap out of them and they've survived. 550-600rwhp will live for pretty much ever IMO unless the tune is crap or you're just super unlucky. Or both.
Last edited by schpenxel; Aug 3, 2020 at 08:24 PM.
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Joined: Mar 2016
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From: Indianapolis Indiana
Lots of good info guys! Much appreciated! A buddy of mine had a boosted GS and ran meth. He went through a whole tank in a single night of spirited driving which is why I was initially against the idea. Hearing these other experiences definitely makes it seem like more of a viable option.
Race Director
Joined: May 2004
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From: Raleigh, NC
St. Jude Donor '15
It's not a bad option.. just have to keep an eye on it. if you were racing back to back to back to back to back for literally hours then maybe it could become a little annoying? I just never really do that, even at 1/2 mile events I didn't go through very much so it was never an issue for me. I dunno. There's always E85 
Last edited by schpenxel; Aug 3, 2020 at 08:26 PM.
Instructor
Joined: May 2017
Posts: 177
Likes: 45
From: Gilbert Az
My car has a similar sized cam with a ECS1500. On 91/meth it made 630whp on 8psi.
I've since done a Fore fuel system and upped the boost. With flex fuel/meth on 13 psi I'm at 780whp.
You'll love the boost
I've since done a Fore fuel system and upped the boost. With flex fuel/meth on 13 psi I'm at 780whp.
You'll love the boost
Race Director
Joined: May 2004
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From: Raleigh, NC
St. Jude Donor '15