[jstanton]

Originally I was just going to do a Stainless Works axle back setup but now I am considering headers, X pipe, and catback. Would that require a tune?

[easttxss]

I believe the general consensus is yes. In stock form, there is no advantage to long tubes over the factory header. I bought this car with the mods already on it and as a package, it does feel better than my first, all stock car did. But if you are doing it just to get louder exhaust, that's a lot of money for some noise. For what it's worth, Stainless Works stuff is nice quality.

[adamjwilson]

Tune required for headers and x-pipe. Should be around ~450rwhp after tune. (from the stock ~385ish rwhp)
Best bang for the buck is headers over aftermarket axle back exhaust. (CON- you will normally void your powertrain warranty with a tune depends your local GM dealer)

[wnta1ss]

Originally Posted by adamjwilson

Tune required for headers and x-pipe. Should be around ~450rwhp after tune. (from the stock ~385ish rwhp)

You're saying that headers and mid pipe gain ~65rwhp on an SS (450 minus 385)? That is a very optimistic number. We've seen tests on the SS, and they've been gaining 15 to 25 at the wheels, yes that was installing long tubes, modding or changing the mid section, and tuning for them. Don't want the OP to get an unrealistic expectation here.

[SSEssence]

Anything affecting the primary cats will need a tune, plus you would want a tune to maximize the gains anyway.

[adamjwilson]

Originally Posted by wnta1ss

You're saying that headers and mid pipe gain ~65rwhp on an SS (450 minus 385)? That is a very optimistic number. We've seen tests on the SS, and they've been gaining 15 to 25 at the wheels, yes that was installing long tubes, modding or changing the mid section, and tuning for them. Don't want the OP to get an unrealistic expectation here.

That is correct. On my first mod to my car it dyno'ed at 445rwhp with 2" headers and x-pipe install. (some others here have gained more) I don't post stuff without researching or documenting it myself along my journey. If you only gain 15-25 rwhp after headers and x-pipe install... I would be looking for a new tuner

[18.2SS.1LE]

Originally Posted by adamjwilson

That is correct. On my first mod to my car it dyno'ed at 445rwhp with 2" headers and x-pipe install. (some others here have gained more) I don't post stuff without researching or documenting it myself along my journey. If you only gain 15-25 rwhp after headers and x-pipe install... I would be looking for a new tuner

385 whp would be on the low side, most A10's are around 400 whp. A 45 whp gain with headers, x-pipe and a tune is still a good gain.

[adamjwilson]

Originally Posted by 18.2SS.1LE

385 whp would be on the low side, most A10's are around 400 whp. A 45 whp gain with headers, x-pipe and a tune is still a good gain.

rwhp is nice to show/post but torque is what you feel! It dyno'ed back then at 453 torque, and was a vast improvement from stock. Best bang for the buck rather than the aftermarket exhaust people normally do first which has very little gains. (The stock exhaust suitcase is good for ~1000 hp anyways but is a lead anchor compared to the aftermarket stuff in weight)

[wnta1ss]

Originally Posted by adamjwilson

That is correct. On my first mod to my car it dyno'ed at 445rwhp with 2" headers and x-pipe install. (some others here have gained more) I don't post stuff without researching or documenting it myself along my journey. If you only gain 15-25 rwhp after headers and x-pipe install... I would be looking for a new tuner

No stock baseline of your car on the exact same dyno that said 445rwhp after headers and tune, correct? Problem with your line of thinking is that you CANNOT know the actual gains from the mods if you don't do the baseline first on the exact same dyno. There is WAY too much variance between dynos to just assume a baseline number. Stock SS dyno numbers ranging from 334rwhp to 443rwhp have appeared on this forum. Unless you baseline, your final numbers are really meaningless.

[adamjwilson]

Originally Posted by wnta1ss

No stock baseline of your car on the exact same dyno that said 445rwhp after headers and tune, correct? Problem with your line of thinking is that you CANNOT know the actual gains from the mods if you don't do the baseline first on the exact same dyno. There is WAY too much variance between dynos to just assume a baseline number. Stock SS dyno numbers ranging from 334rwhp to 443rwhp have appeared on this forum. Unless you baseline, your final numbers are really meaningless.

Really dude?? .. this is not my first rodeo.. baseline was at 385 (Gen5 SS cars are slightly lower)
I was probably working with various dynos when you were a kid...lmao
And you are not stating anything new that a speed shop would not know.
Take your preaching somewhere else unless you can add color to this post

[wnta1ss]

Originally Posted by adamjwilson

Really dude?? .. this is not my first rodeo.. baseline was at 385 (Gen5 SS cars are slightly lower)
I was probably working with various dynos when you were a kid...lmao
And you are not stating anything new that a speed shop would not know.
Take your preaching somewhere else unless you can add color to this post

Your post that I had quoted did not say that you were talking about a FIFTH GEN Camaro for those numbers. Because the OP wants to mod a SIXTH GEN Camaro, logic would obviously dictate that was the subject here. Dyno reports that I was talking about, of course, where for a 6th gen SS, like the OP wants to mod.

As far as that crap about preaching, trying to give accurate data, when someone like you had given optimistic numbers, is just doing a favor for the guys who want to know what reality is. Now we know that the numbers you posted were actually irrelevant to the OP's car, coming from a totally different car than his.

[s346k]

Originally Posted by jstanton

Originally I was just going to do a Stainless Works axle back setup but now I am considering headers, X pipe, and catback. Would that require a tune?

require a tune for what?

to drive around? no. i did 2" long tubes, orx & custom 3" exhaust on my car and put maybe 1000 miles on it before i got it tuned. it was louder and smellier, but that's about it. no issues with running & driving. no performance gain to be had and the CEL was on.

i had the car tuned on ethanol with a ported LT1 manifold and picked up 6 mph in the 1/4 from stock. 18 ss 1LE

[adamjwilson]

Originally Posted by wnta1ss

Your post that I had quoted did not say that you were talking about a FIFTH GEN Camaro for those numbers. Because the OP wants to mod a SIXTH GEN Camaro, logic would obviously dictate that was the subject here. Dyno reports that I was talking about, of course, where for a 6th gen SS, like the OP wants to mod.

As far as that crap about preaching, trying to give accurate data, when someone like you had given optimistic numbers, is just doing a favor for the guys who want to know what reality is. Now we know that the numbers you posted were actually irrelevant to the OP's car, coming from a totally different car than his.

Dude… LOOK at my tag… I have a 6 Gen Camaro
Wake up

[SJFGTO]

Headers and no tune creates a dangerous lean condition. Driving around town you may be ok, but getting on it/accelerating briskly will increase the risk of engine damage significantly. Your ecm can not sufficiently adjust for the addition of headers. Why ever risk it?