Raising compression vs supercharging - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

weSS1LEy · 05-01-2020, 03:04 AM

Hypothetically if I wanted to do milled heads and increase compression, would that make it more difficult to supercharge later on?

14Black1LESS · 05-01-2020, 05:24 AM

Not necessarily. It will limit the psi you can run on the supercharger though.

Greenhornet2 · 05-01-2020, 06:39 AM

It makes it less efficient to supercharge yes. You can still do it but you limit yourself.

pyroguy · 05-01-2020, 07:30 AM

Quote:

Originally Posted by 14Black1LESS

Not necessarily. It will limit the psi you can run on the supercharger though.

Quote:

Originally Posted by Greenhornet2

It makes it less efficient to supercharge yes. You can still do it but you limit yourself.

These two summed it up pretty well. Milling is great for a NA application, but is not necessary and can limit potential in a boosted application.

ZED SLED · 05-01-2020, 11:18 AM

You could always boost with this, lol

Name: tornado.jpg
Views: 762
Size: 22.8 KB

ADVMax · 05-01-2020, 11:49 AM

Quote:

Originally Posted by ZED SLED

You could always boost with this, lol

Attachment 1030092

Chris49066SS · 05-02-2020, 10:15 AM

Quote:

Originally Posted by ZED SLED

You could always boost with this, lol

Attachment 1030092

Because it swirls the air into the intake manifold! Hahaha throwback to 2002 when those commercials acted like this thing made ALL the sense.

I kinda want to watch some old Horsepower TV episodes now and read some classic Camaro5 threads from 2010 for informational purposes on the platform lol

mikeman · 05-02-2020, 02:01 PM

What about these?

hammdo · 05-02-2020, 02:09 PM

I did — milled heads, cam, and LSA SC On my L99...

-Don

weSS1LEy · 05-02-2020, 10:49 PM

So say a local shop installs Maggies at 8 pounds of boost (a safe low number) would a compression ratio of 11 or 11.5 : 1 inhibit this? I’m totally guessing at what a CR might be.

Also aren’t the lt1s 11.5:1?

mikeman · 05-02-2020, 11:01 PM

Quote:

Originally Posted by weSS1LEy

So say a local shop installs Maggies at 8 pounds of boost (a safe low number) would a compression ratio of 11 or 11.5 : 1 inhibit this? I’m totally guessing at what a CR might be.

Also aren’t the lt1s 11.5:1?

Yes, LT1's are 11.5:1, but the LT4 is 10:1 running 9 lbs of boost.

AGM 1LE · 05-02-2020, 11:17 PM

Quote:

Originally Posted by weSS1LEy

So say a local shop installs Maggies at 8 pounds of boost (a safe low number) would a compression ratio of 11 or 11.5 : 1 inhibit this? I’m totally guessing at what a CR might be.

Also aren’t the lt1s 11.5:1?

LT1s are direct injected. Different ballgame

weSS1LEy · 05-03-2020, 01:52 AM

Quote:

Originally Posted by mikeman

Yes, LT1's are 11.5:1, but the LT4 is 10:1 running 9 lbs of boost.

Ahh ok interesting. Maybe it’s it’s not worth bumping the compression. Kinda want to have my cake and eat it too.

christianchevell · 05-03-2020, 08:32 AM

Bumping the compression would just make it hard to raise boost levels below low and also maybe make you have PTV interference if not some different angle aftermarket heads like say GPI's ls7 style, you have a lot of duration but not so much lift with a wider LSA for good torque, you are about my specs for my daily driver cam I use until build some day.
Also BTW just increasing compression will not gain you that much more HP with what little you could glean from shaving the heads you may gain just 5 hp......… Myself I am hoping to go GPI a couple years down the road as I have a gorilla on my back with daughter graduation in Neuro science in June..... And I will alter for my being stroked the Cam specs as more volume allows to make more gas in thus more power...we are giant air pumps...… And when you do go boosted you will want to ditch that cam like me.... The nice things is five grand for a cam and small bore heads is noting compared to what you could ditch on a blower/turbo..and then you would wish your forged.... Good Luck!

05-01-2020, 03:04 AM	#1
weSS1LEy weSS1LEy Drives: 2015 camaro 2ss/rs/1le Join Date: Sep 2015 Location: Kelowna Posts: 510	Raising compression vs supercharging Hypothetically if I wanted to do milled heads and increase compression, would that make it more difficult to supercharge later on? __________________ Rotofab, arh no cats, atak, elite cc, 94 octane tune, Mobil 1, phastek scoop, custom cam 230/243 .621 .604 114+4, related cam kit stuff. 470/435 rwhp/rwtq

05-01-2020, 05:24 AM	#2
14Black1LESS Drives: 2014 2SS/RS/1LE Join Date: Mar 2015 Location: Hurricane Alley Posts: 697	Not necessarily. It will limit the psi you can run on the supercharger though. __________________

05-01-2020, 06:39 AM	#3
Greenhornet2 Drives: 2011 Camaro 2SS LS3 Whipple Join Date: May 2019 Location: Connecticut Posts: 1,925	It makes it less efficient to supercharge yes. You can still do it but you limit yourself. __________________ Whipple 2.9 CAI ID1050x injectors ZL1 Pump JRE FPCM JMS Voltage booster JRE Rough Idle blower cam BTR .660 springs CHE trunnion kit 1 7/8 Speed Engineering Borla Atak JRE scoop 1.5" lowering springs BMR trailing arms and toe links Cradle inserts 704WHP 603WTQ 93 octane

05-01-2020, 11:18 AM	#5
ZED SLED Drives: 2017 Mosaic Bk ZL1 M6 Join Date: Jul 2009 Location: South of Raleigh, NC Posts: 9,477 View My Garage	You could always boost with this, lol __________________

05-02-2020, 02:01 PM	#8
mikeman Banned Drives: 2015 Camaro Join Date: Aug 2018 Location: My Garage Posts: 1,125	What about these? Attached Images

05-02-2020, 02:09 PM	#9
hammdo 'It's an experiment' Drives: [COTW 2/09/15] '11 GPI LSA SC Z/LE Join Date: May 2014 Location: Dallas TX Posts: 8,694 View My Garage	I did — milled heads, cam, and LSA SC On my L99... -Don __________________ 747 RWHP 794 RWTQ "Horsepower sells cars, torque wins races." - Enzo Ferrari See My Build: http://www.camaro5.com/forums/showthread.php?t=385577

05-02-2020, 10:49 PM	#10
weSS1LEy weSS1LEy Drives: 2015 camaro 2ss/rs/1le Join Date: Sep 2015 Location: Kelowna Posts: 510	So say a local shop installs Maggies at 8 pounds of boost (a safe low number) would a compression ratio of 11 or 11.5 : 1 inhibit this? I’m totally guessing at what a CR might be. Also aren’t the lt1s 11.5:1? __________________ Rotofab, arh no cats, atak, elite cc, 94 octane tune, Mobil 1, phastek scoop, custom cam 230/243 .621 .604 114+4, related cam kit stuff. 470/435 rwhp/rwtq

05-03-2020, 08:32 AM	#14
christianchevell old school chevy rodder Drives: 2013 2SS/RS Manual,DM exhaust,CRT Join Date: Jul 2012 Location: Oregon Posts: 5,587 View My Garage	Bumping the compression would just make it hard to raise boost levels below low and also maybe make you have PTV interference if not some different angle aftermarket heads like say GPI's ls7 style, you have a lot of duration but not so much lift with a wider LSA for good torque, you are about my specs for my daily driver cam I use until build some day. Also BTW just increasing compression will not gain you that much more HP with what little you could glean from shaving the heads you may gain just 5 hp......… Myself I am hoping to go GPI a couple years down the road as I have a gorilla on my back with daughter graduation in Neuro science in June..... And I will alter for my being stroked the Cam specs as more volume allows to make more gas in thus more power...we are giant air pumps...… And when you do go boosted you will want to ditch that cam like me.... The nice things is five grand for a cam and small bore heads is noting compared to what you could ditch on a blower/turbo..and then you would wish your forged.... Good Luck! __________________ 2021 Wild Cherry ZL1 A10, Sunroof, Data, Carbon, Nav, RotoFab Dry CAI, Elite x2, Borla ATK, Driveshaft shop