c7 headers
Thread Starter
Melting Slicks
Joined: Mar 2009
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c7 headers
I know headers are coming out for c7 stingrays, I read up to 30 hp 46 pounds of torque gained tuned. I say that's a lot any thoughts if so why is the motor so restrictive. I have seen stock dyno numbers in 410 range so with headers 40hp increase tuned of course that's amazing....I think I might add one to.my collection....
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From: Oklahoma City
St. Jude Donor '09-'10-'11-'12-'13-'14-'15-'16-'17,'19,'22
I saw LG's Facebook page update yesterday and they had nice gains without a tune. It looks like headers will again be a must add for those looking to squeeze out some power.
Sorry can't answer the restrictive question. Maybe others will chime in.
Sorry can't answer the restrictive question. Maybe others will chime in.
Racer
Joined: Mar 2012
Posts: 446
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From: Christiansburg VA
A slightly restrictive exhaust can help cats light off much faster, reducing emissions. I suspect this is why headers gain so much power, because that concern more or less goes out the window.
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From: Manassas Park VA
St. Jude Donor '07-'08,-'13-'14, '16-'17
Pfadt has already released their C7 Tri-Y Headers
http://www.customcorvetteaccessories...iyheaders.html
Regards
Chip
http://www.customcorvetteaccessories...iyheaders.html
Regards
Chip
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Thread Starter
Melting Slicks
Joined: Mar 2009
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I just seen that no a/f ratio I don't see just adding an exhaust will get that much I'm sorry either the a/f is dead on from factory or some tweaking had to be done that means u will be able to get 50 80 hp with just headers and a tune... GM engineers didn't restrict that exhaust that much, I don't bother with LG posts or ETC..... Sorry not my cup of tea ill wait to see what others get with Tune and exhaust....Maybe ill go get one...
Last edited by RamAir972003; Oct 10, 2013 at 11:34 PM.
Thread Starter
Melting Slicks
Joined: Mar 2009
Posts: 2,321
Likes: 71
Pfadt has already released their C7 Tri-Y Headers
http://www.customcorvetteaccessories...iyheaders.html
Regards
Chip
http://www.customcorvetteaccessories...iyheaders.html
Regards
Chip
Last edited by RamAir972003; Oct 10, 2013 at 11:15 PM.
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Thread Starter
Melting Slicks
Joined: Mar 2009
Posts: 2,321
Likes: 71
Pfadt has already released their C7 Tri-Y Headers
http://www.customcorvetteaccessories...iyheaders.html
Regards
Chip
http://www.customcorvetteaccessories...iyheaders.html
Regards
Chip
Thread Starter
Melting Slicks
Joined: Mar 2009
Posts: 2,321
Likes: 71
So why on the LS7 Gain is so minimal some say 8hp some say 20 I think I gained maybe 12 but more torque but again I have 13/4 headers on my Ls7 I should have gotten the 1-7/8 for my application...
Safety Car
Joined: Nov 2012
Posts: 4,737
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From: North California
I don't see it. The dyno was untuned without cats. What if taking the cats off is responsible for 90% of the gain? What if it runs too lean without a tune?
Is it unusual for an LS3 to gain 30whp by eliminating the cats and replacing the header?
There is a lot of wishful thinking going on. Besides, you should all be asking how the temps change for the exhaust valve with the new header.
It's always easy to make extra hp with a 6.2L engine that starts off passing emissions, and GM reliability testing. But NONE of the HP is free. Show me a mod that is an upgrade without being a downgrade in some way.
I'll wait for the HI-po car built by GM instead. They know a thing or two about making proper upgrades.
Is it unusual for an LS3 to gain 30whp by eliminating the cats and replacing the header?
There is a lot of wishful thinking going on. Besides, you should all be asking how the temps change for the exhaust valve with the new header.
It's always easy to make extra hp with a 6.2L engine that starts off passing emissions, and GM reliability testing. But NONE of the HP is free. Show me a mod that is an upgrade without being a downgrade in some way.
I'll wait for the HI-po car built by GM instead. They know a thing or two about making proper upgrades.
Thread Starter
Melting Slicks
Joined: Mar 2009
Posts: 2,321
Likes: 71
I don't see it. The dyno was untuned without cats. What if taking the cats off is responsible for 90% of the gain? What if it runs too lean without a tune?
Is it unusual for an LS3 to gain 30whp by eliminating the cats and replacing the header?
There is a lot of wishful thinking going on. Besides, you should all be asking how the temps change for the exhaust valve with the new header.
It's always easy to make extra hp with a 6.2L engine that starts off passing emissions, and GM reliability testing. But NONE of the HP is free. Show me a mod that is an upgrade without being a downgrade in some way.
I'll wait for the HI-po car built by GM instead. They know a thing or two about making proper upgrades.
Is it unusual for an LS3 to gain 30whp by eliminating the cats and replacing the header?
There is a lot of wishful thinking going on. Besides, you should all be asking how the temps change for the exhaust valve with the new header.
It's always easy to make extra hp with a 6.2L engine that starts off passing emissions, and GM reliability testing. But NONE of the HP is free. Show me a mod that is an upgrade without being a downgrade in some way.
I'll wait for the HI-po car built by GM instead. They know a thing or two about making proper upgrades.
Last edited by RamAir972003; Oct 11, 2013 at 03:41 AM.
Safety Car
Joined: Nov 2012
Posts: 4,737
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From: North California
I'm thinking the restriction is in the tune. Think about it the more cars I have seen the more the manufactures come out with a nice stock exhaust from factory im thinking heads and cam and exhaust car will be at 510 to wheels....So are you planning on buying one in near future... I think the timing is not as much as in the ls3 in the 20s more in the teens for c7 and its pig rich....
Oem exhaust technology has been top notch for over a decade now. All the gains you see are almost entirely through the elimination of baffled resonators. That is fine...for a race car.
Thread Starter
Melting Slicks
Joined: Mar 2009
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Likes: 71
Well i just hope it gets 30mpg lol well I meant restrictive as tuning exhaust and so on I think the Z06 next Gen is going to be so crazy that the earth is going to shake overseas...and zr1 is going to be 725hp
Last edited by RamAir972003; Oct 11, 2013 at 05:30 AM.
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From: Manassas Park VA
St. Jude Donor '07-'08,-'13-'14, '16-'17
I know Corsa is almost ready - Maybe in Dec
Regards
Chip