Car makes 11 lbs boost??? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Jason P · 05-20-2013, 09:41 AM

With all the reading I have been doing I figured I would be losing boost. My cam specs are 231/243 .617/.624, I also have ported and polished stock ls3 heads with 1 7/8 long tube headers. I didn't plan on supercharging my car but Jessika made me such a good deal I couldn't pass it up, so I bought a magnuson 2300 with the overdrive pulleys. Just looking for one of the experts thoughts. Like I said before I figured boost would be less. (5-7 lbs)

bct10985 · 05-20-2013, 09:49 AM

My car made 11.5psi on the dyno with a stock ecs kit and longtubes, which i thought would actually bring down the boost a bit. Was expecting around 8-9.

Jason P · 05-20-2013, 09:59 AM

Are you running a NA cam also? I thought I would be less boost with the cam, heads and headers. Not complaining, car runs awesome, just not what I was expecting. Ihave spent hours reading threads about overlap, losing boost out the exhaust valves, lower boost with ported heads, etc. Now just looking for a better education.

VanquisherSS · 05-20-2013, 10:01 AM

I made 15.3lbs of boost on my NA cam with the ECS Kit.

EliteCZM523 · 05-20-2013, 10:14 AM

Quote:

Originally Posted by Jason P

With all the reading I have been doing I figured I would be losing boost. My cam specs are 231/243 .617/.624, I also have ported and polished stock ls3 heads with 1 7/8 long tube headers. I didn't plan on supercharging my car but Jessika made me such a good deal I couldn't pass it up, so I bought a magnuson 2300 with the overdrive pulleys. Just looking for one of the experts thoughts. Like I said before I figured boost would be less. (5-7 lbs)

This would be why.

bct10985 · 05-20-2013, 10:32 AM

Stock ls3 cam

xjer22x · 05-20-2013, 11:05 AM

plus if you have cats on the car it will create restriction in the exhaust which will increase boost levels.

Jason P · 05-20-2013, 11:37 AM

No cats.

bct10985 · 05-20-2013, 11:45 AM

No cats

EliteCZM523 · 05-20-2013, 12:22 PM

Two different types of blowers, One is a PD, other is Centri. The ECS kit runs a bit more boost then the PD does. Also, OD pulleys will increase Boost levels.

old motorhead · 05-20-2013, 01:00 PM

What size pulley do you have up front? I think it takes a whole lot bigger cam with more overlap than you have to really "bleed" boost.

Jason P · 05-20-2013, 01:21 PM

Quote:

Originally Posted by old motorhead

What size pulley do you have up front? I think it takes a whole lot bigger cam with more overlap than you have to really "bleed" boost.

Stock pulley up front. And you just kinda answered my question. I guess I wanted to know when I started to lose boost.

bct10985 · 05-20-2013, 01:24 PM

Quote:

Originally Posted by EliteCZM523

Two different types of blowers, One is a PD, other is Centri. The ECS kit runs a bit more boost then the PD does. Also, OD pulleys will increase Boost levels.

Just sayin they advertise 9lbs and i thought with the headers and no cats it would of been a little less.

Jessika · 05-20-2013, 02:11 PM

First off,

The 3.8 front pulley and 1:1 rear should make 6ish. The OD on the rear should put it to 9.5ish.

Lately it seems like everyone is making more boost than in the past... it is odd. Anyway, do you have a dyno sheet? Just curious...

Brandon/Suxost or however it is spelled also is making higher than average boost but he is running HF cats.

05-20-2013, 09:41 AM	#1
Jason P Drives: 2011 2ss Join Date: Oct 2012 Location: United States Posts: 272	Car makes 11 lbs boost??? With all the reading I have been doing I figured I would be losing boost. My cam specs are 231/243 .617/.624, I also have ported and polished stock ls3 heads with 1 7/8 long tube headers. I didn't plan on supercharging my car but Jessika made me such a good deal I couldn't pass it up, so I bought a magnuson 2300 with the overdrive pulleys. Just looking for one of the experts thoughts. Like I said before I figured boost would be less. (5-7 lbs) __________________ 2011 2ss Ram twin plate ceramic clutch, Texas speed 418 LS3 235 /243 .621 / .624 cam, ported and polished heads with dual springs,magnum push rods, Hotchkis race pack, Stainless Power long tube headers with no cats, Magna Flo competition exhaust, lpe fuel pump, magnuson supercharger with overdrive and port matched blower plate, IW 8 rib pullies, AEM meth kit, id 850 injectors, 3 bar map, halltech cai, zl1 rear diff

05-20-2013, 09:49 AM	#2
bct10985 Drives: 2010 2SS LS3, 2013 duramax Join Date: Nov 2012 Location: Dover, De Posts: 1,451	My car made 11.5psi on the dyno with a stock ecs kit and longtubes, which i thought would actually bring down the boost a bit. Was expecting around 8-9. __________________ ECS Ysi-B, cam, Tsp 2" longtubes, Squash dual pumps, Id1300s, meth, 4L80e, FTI 3600, ZL1 3.73 diff, BMR suspension, 15" conversion, weld rts mt 275 et street R. 9.6@147mph

05-20-2013, 09:59 AM	#3
Jason P Drives: 2011 2ss Join Date: Oct 2012 Location: United States Posts: 272	Are you running a NA cam also? I thought I would be less boost with the cam, heads and headers. Not complaining, car runs awesome, just not what I was expecting. Ihave spent hours reading threads about overlap, losing boost out the exhaust valves, lower boost with ported heads, etc. Now just looking for a better education. __________________ 2011 2ss Ram twin plate ceramic clutch, Texas speed 418 LS3 235 /243 .621 / .624 cam, ported and polished heads with dual springs,magnum push rods, Hotchkis race pack, Stainless Power long tube headers with no cats, Magna Flo competition exhaust, lpe fuel pump, magnuson supercharger with overdrive and port matched blower plate, IW 8 rib pullies, AEM meth kit, id 850 injectors, 3 bar map, halltech cai, zl1 rear diff

05-20-2013, 10:32 AM	#6
bct10985 Drives: 2010 2SS LS3, 2013 duramax Join Date: Nov 2012 Location: Dover, De Posts: 1,451	Stock ls3 cam __________________ ECS Ysi-B, cam, Tsp 2" longtubes, Squash dual pumps, Id1300s, meth, 4L80e, FTI 3600, ZL1 3.73 diff, BMR suspension, 15" conversion, weld rts mt 275 et street R. 9.6@147mph

05-20-2013, 11:05 AM	#7
xjer22x Drives: 2010 rs/ss black # 10,308 Join Date: Mar 2009 Location: hoffman estates, il Posts: 914 View My Garage	plus if you have cats on the car it will create restriction in the exhaust which will increase boost levels. __________________ SYCK SS BUILD JOURNAL- Click here

05-20-2013, 10:01 AM	#4
VanquisherSS Hasbin of Stock Bottom HP Drives: CTS-V Coupe, 04 TT Viper Join Date: May 2011 Location: NJ Posts: 2,561 View My Garage	I made 15.3lbs of boost on my NA cam with the ECS Kit.

05-20-2013, 11:37 AM	#8
Jason P Drives: 2011 2ss Join Date: Oct 2012 Location: United States Posts: 272	No cats. __________________ 2011 2ss Ram twin plate ceramic clutch, Texas speed 418 LS3 235 /243 .621 / .624 cam, ported and polished heads with dual springs,magnum push rods, Hotchkis race pack, Stainless Power long tube headers with no cats, Magna Flo competition exhaust, lpe fuel pump, magnuson supercharger with overdrive and port matched blower plate, IW 8 rib pullies, AEM meth kit, id 850 injectors, 3 bar map, halltech cai, zl1 rear diff

05-20-2013, 11:45 AM	#9
bct10985 Drives: 2010 2SS LS3, 2013 duramax Join Date: Nov 2012 Location: Dover, De Posts: 1,451	No cats __________________ ECS Ysi-B, cam, Tsp 2" longtubes, Squash dual pumps, Id1300s, meth, 4L80e, FTI 3600, ZL1 3.73 diff, BMR suspension, 15" conversion, weld rts mt 275 et street R. 9.6@147mph

05-20-2013, 12:22 PM	#10
EliteCZM523 Drives: 2010 2SS/RS Join Date: Sep 2010 Location: Westchester, NY Posts: 99	Two different types of blowers, One is a PD, other is Centri. The ECS kit runs a bit more boost then the PD does. Also, OD pulleys will increase Boost levels. __________________ ARH 1 7/8 w/ cats, Borla ATAK Axle Back, VaraRam, ECS Cam, JDP Halo Kit, Technostalgia Tail Lights, AAC Ghosted SMD Side Markers, Reverse Lights, P13W Plasma DRL's, DRL Harness, Kenwood 9990HD, Scosche Kit, and tons more

05-20-2013, 01:00 PM	#11
old motorhead Drives: Maggie blown LS3 vette Join Date: Aug 2009 Location: SE TX Posts: 1,490	What size pulley do you have up front? I think it takes a whole lot bigger cam with more overlap than you have to really "bleed" boost.

05-20-2013, 02:11 PM	#14
Jessika Account Suspended Drives: Anything Blown Join Date: Aug 2010 Location: SoCal Posts: 1,194	First off, The 3.8 front pulley and 1:1 rear should make 6ish. The OD on the rear should put it to 9.5ish. Lately it seems like everyone is making more boost than in the past... it is odd. Anyway, do you have a dyno sheet? Just curious... Brandon/Suxost or however it is spelled also is making higher than average boost but he is running HF cats.