CRUZMISL

Well the saga is finally complete. The install went without a hitch and the fit and finish is excellent. Headers have been on for almost a month now and no leaks or problems at all.

I had them installed and here are the pre dyno numbers. The only mods I have are a Blackwing and a carbon fiber airbridge. The airbridge is really only for looks.

Max Power 334.6@5800 RPM
Max Torque 333.9@4700 RPM

I took the car home and it felt like it had more power but my ATAP reading were showing positive LTFT's in the 10-15 range which is not ideal for power. Despite the rich conditions it dynoed today (3 weeks later) at,

Max Power 346.8@5900 RPM
Max Torque 344.2@4300 RPM

This is a difference of 12.2 HP and 10.9 lbs of torque. Not bad considering the fuel was all out of whack.

After that run they used LS1 edit to level out the trims the results are as follows.

Max Power 356.60@5900 RPM
Max Torque 350.10@4900 RPM

Which is an increase of,
22HP
16.2 TQ

These are peak numbers but they show this gain from ~3K (where the test began) all the way to redline. I am really pleased with this result especially since I have a Z06. The Z's routinely makes less HP numbers than the LS1's not only with header mods but intakes, exhaust etc. I'd bet money an LS1 would benefit even more. Another thing to note is the runs were done on a Mustang dyno and all at the same location.

If anyone is interested in these headers, Stainlessworks can be contacted at http://www.stainlessworks.net They are also a generous sponsor of the Canamcaravan as well. I plan to scan the dyno sheets at work on Monday but thought I'd report tonight.

Any questions ask away.

Joe






[Modified by CRUZMISL, 8:52 PM 7/14/2002]

NastyC5

Congrats on the results :cheers:
This makes it even harder to decide which long tubes to go with :crazy:

Smoke-N-Shot

Congrats on the install... Has the sound on the exhaust tone at all? Deeper etc?

Patches

Congrats, Joe! :cheers: Looks like the research and work finally paid off. Those are excellent gains and consistent with what you'd expect - very positive. Those headers do look extremely nice. Any pics yet - would love to see them installed.

I haven't dyno'ed after my FLP install yet but hope to get similar results.

CRUZMISL

The sound has definitely changed for the better. Not deeper just more aggressive. No resonance anywhere in the rpm range.

BTW they don't come white from Stainlessworks. I had them coated by Swaintech. I am still deciding if it was worth the expense. Since the headers are stainless steel, they will not corrode and they hold much more heat in than mild steel headers. Probably overkill but I did it anyway. Jet hott is not even in the same league as this coating though. Jet hot is more of a high temp paint than a true ceramic coating and doesn't control temperature nearly as well.




Joe


[Modified by CRUZMISL, 9:46 AM 7/14/2002]

Patches

Wow! Very clean install. How are the collectors attached to the cats? In the pics, it looks like they were swaged. Clearance looks good too.

I got a similar sound improvement as well. It's a cleaner, crisper tone.

How delicate is the Swaintech coating? Can you tell if there's a noticeable drop in radiated heat to the engine bay compared to other coated headers?

Ed


[Modified by Patches, 9:59 AM 7/14/2002]

CRUZMISL

The collectors are attached to the cats via a slip fit connector which is welded on and a stainless band clamp is used to secure them.

The swaintech coating is strange. It feels like 400 grit sandpaper and has the appearance of spray welding. I Actually think it is sprayed on molten then solidifies on the headers. It is very thick and durable. How much heat is reduced?? I don't have any idea.

Joe

CRUZMISL

I added the dyno sheets to the original post. If you want full res images let me know.

I hope this helps some people make their decision.

Joe

Miles in Michigan

Did APE install them for you, or did they just do the dyno?

Could you tell me what the install cost, and how long it took? Also, what did they charge you for tuning?

Great results on the headers, BTW. It's good to see the difference tuning can make. Several people have posted really low gains after LT headers, but they never got the car tuned, and didn't have AFR recorded. This seems to corroborate my theory that tuning was the reason. It'd be awesome if you could post air-fuel ratios for the runs, to see how adding headers changed the AFR, before the car was tuned.

Miles in Michigan

I forgot to ask, what did the coating cost you? Swaintech lists header coating as 225-275, but I'm curious if you had to pay for shipping to and from them, or if stainlessworks got them coated for you.

Thanks again,
Miles

CRUZMISL

Miles, APE did the install and if I recall it was around $400 and took them 6 hours. The tuning ran another $400 but I can go back for "tweaks" anytime I want.The Swaintech coating was $250 and only $15 to ship them via UPS ground. Again the coating wasn't necessary I just have this disease that forces me to spend money :)

Tuning is important especially when you get into these mods. Especially in the Z06's the puter is so tight it doesn't allow much gains by simple bolt ons. Now you have to think of a bolt on like the old days with carbs. The computer will simply not adjust for it as the parameters are not there. The LS1's are much more forgiving but could still benefit.

Joe

Road Warrior

Congrats Joe! :cheers: I'm glad it all worked out for you and thanks for letting me tag along for the dyno tune. Now let's get out to the track and see what kind of times it'll run. :D

Mike

The DBK

Who knows, but as long as it runs 12.69 I'll be a happy motherF$*k#r! :lol:

C5Noir

Great gains, gotta love the tuning ;) :cheers:

CRUZMISL

:lol: :lol: :lol: :lol: :lol:

MattG

Congrats on the great results Joe!! :cheers: :cheers:

Would anyone be interested in a GP on these??

Miles in Michigan

Sure. Especially if they are coated.

CJS

CRUZMISL, did the headers add any now louder, but normal engine noises or excessive heat to come into the cabin? In other words what are the downside differences on this mod?

The DBK

I would, after the Can Am especially.

CRUZMISL

I'd have to saty that there is more mechanical noise because the stock cast manifolds keep a lot of it in but it is not even noticeable now. It is typically at idle outside the car standing next to it. Inside at idle it is the same a sstock, no difference. Cruising it is a bit more aggressive but nothing too crazy. I actually think it sounds more exotic.

As afr as heat absolutely no issues there either. TO sum up I'd say for all intents and purposes they don't exist except when you are at WOT they are a bit louder however zero resonance inside the car.

Hope this helps.

Joe