2" primaries vs 1 7/8's for blower setup? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Nighthawk89 · 03-31-2015, 01:44 PM

I currently have the kooks LT's with their High flow cats and i just bought yesterday the Corsa ZL1 exhaust 3" cat back. Do i honestly need the 2" primaries?

Trackman · 03-31-2015, 01:51 PM

I think you might need 7-800rwhp to see any gains from them.

Unreal · 03-31-2015, 02:35 PM

I made 1090 on 1 7/8. No need unless going for 1100+ IMO

H-E · 03-31-2015, 02:59 PM

If I was buying I would buy 2 for your setup,since you already have headers I wouldn't think it would be worth swaping unless money is no object.

Nighthawk89 · 03-31-2015, 03:21 PM

Quote:

Originally Posted by Trackman

I think you might need 7-800rwhp to see any gains from them.

Thats the power range im going to be in.

Nighthawk89 · 03-31-2015, 03:22 PM

Quote:

Originally Posted by H-E

If I was buying I would buy 2 for your setup,since you already have headers I wouldn't think it would be worth swaping unless money is no object.

Thats what im thinking..

Unreal · 03-31-2015, 04:32 PM

1 7/8" will support more than that blower can ever make. If buying new with a blower, do like HE said and get some 2s, but 1 7/8 are not going to hold you back at all.

Nighthawk89 · 03-31-2015, 04:52 PM

Quote:

Originally Posted by Unreal

1 7/8" will support more than that blower can ever make. If buying new with a blower, do like HE said and get some 2s, but 1 7/8 are not going to hold you back at all.

Sounds good brotha. Just was pondering the idea of upgrading. Hopefully this well help answer some of the other forum members questions as well.

JANNETTYRACING · 03-31-2015, 05:21 PM

Quote:

Originally Posted by Nighthawk89

I currently have the kooks LT's with their High flow cats and i just bought yesterday the Corsa ZL1 exhaust 3" cat back. Do i honestly need the 2" primaries?

We tested this theory, at 860 RWHP we switched from 1 7/8 to 2 inch and picked up 22 RWHP, same day same dyno same conditions.

2012 Camaro JRE 416 Vortech YSI.

Hope this helps.

Ted.

camarossdusk · 03-31-2015, 07:33 PM

i am good with 1 7/8 long tubes on my setup, considered going to 2 inch long tubes but didn't seem worth the cost, would rather use the money to put toward some ported heads to help the engine breathe better, it all comes down to how much power you want to make.

realcanuk · 03-31-2015, 09:39 PM

Quote:

Originally Posted by Unreal

1 7/8" will support more than that blower can ever make. If buying new with a blower, do like HE said and get some 2s, but 1 7/8 are not going to hold you back at all.

bayarea408 · 03-31-2015, 09:40 PM

do you want the biggest and the baddest?

2"

quickvert1 · 04-01-2015, 10:01 AM

Quote:

Originally Posted by JANNETTYRACING

We tested this theory, at 860 RWHP we switched from 1 7/8 to 2 inch and picked up 22 RWHP, same day same dyno same conditions.

2012 Camaro JRE 416 Vortech YSI.

Hope this helps.

Ted.

how about torque ted?

JANNETTYRACING · 04-01-2015, 10:12 AM

Quote:

Originally Posted by quickvert1

how about torque ted?

Up as well everywhere sorry don't recall exactly.

03-31-2015, 01:44 PM	#1
Nighthawk89 Drives: 2011 Camaro 2Ss M6 Join Date: Dec 2011 Location: Southern California Posts: 4,013	2" primaries vs 1 7/8's for blower setup? I currently have the kooks LT's with their High flow cats and i just bought yesterday the Corsa ZL1 exhaust 3" cat back. Do i honestly need the 2" primaries?

03-31-2015, 02:35 PM	#3
Unreal Drives: 2006 Z06 Join Date: Oct 2010 Location: Gilbert, AZ Posts: 5,712	I made 1090 on 1 7/8. No need unless going for 1100+ IMO __________________ Nick Corvette Z06 -1200ish rwhp

03-31-2015, 04:32 PM	#7
Unreal Drives: 2006 Z06 Join Date: Oct 2010 Location: Gilbert, AZ Posts: 5,712	1 7/8" will support more than that blower can ever make. If buying new with a blower, do like HE said and get some 2s, but 1 7/8 are not going to hold you back at all. __________________ Nick Corvette Z06 -1200ish rwhp

03-31-2015, 07:33 PM	#10
camarossdusk whippled 5th gen Drives: 2013 camaro ss Join Date: Jun 2013 Location: West Texas Posts: 442 View My Garage	i am good with 1 7/8 long tubes on my setup, considered going to 2 inch long tubes but didn't seem worth the cost, would rather use the money to put toward some ported heads to help the engine breathe better, it all comes down to how much power you want to make. __________________ Whipple running 13 lbs of boost, Innovators west 8 rib with 10 percent over drive crankshaft pulley. Fore level 2 Dual pump fuel system, with duel TI auto fuel pumps, ID 1300 fuel injectors, tuned on e85. Driveshaft shop aluminum driveshaft, 1400 hp half shafts, Detroit tru-trac. ls9 camshaft, CNC ported heads, with trunion and dual valve spring upgrade, LS9 head gaskets, ARP 2000 head studs, Manley stainless valves. Adjustable Bmr toe rods, trailing arms, rear adjustable sway bar, full cradle bushings, upper control arm bushings, BMR diff. bushings, bmr driveshaft safety loop.

03-31-2015, 01:51 PM	#2
Trackman Drives: 67RS Camaro ,Black 2013 ZL1 Join Date: Jun 2010 Location: Alberta Posts: 1,408	I think you might need 7-800rwhp to see any gains from them.

03-31-2015, 02:59 PM	#4
H-E Account Suspended Drives: 2010 zr1 Camaro 2011 vert Join Date: Apr 2013 Location: everywhere Posts: 1,121	If I was buying I would buy 2 for your setup,since you already have headers I wouldn't think it would be worth swaping unless money is no object.

03-31-2015, 09:40 PM	#12
bayarea408 Drives: T Join Date: Mar 2015 Location: CA Posts: 803	do you want the biggest and the baddest? 2"