My CL-S6 dynoed before and after comptech headers.

Before: http://www.youtube.com/watch?v=C0B7ESymGBM

After: http://www.youtube.com/watch?v=mGlsX...eature=related

loving it

 

Nice vids and numbers. Can never get tired of that sound...

 

Yep! 221 before and 242 after

 

wow, 221whp stock and 242whp with just headers?

dude, is that all the mods you have?
if so, that is a really strong engine. great numbers man
how many miles on it?
what gear did you run the dyno on, 4th?

 

This was a 3rd gear pull. The car just rolled over 135,500 and not a leak in sight and I got an AEM CAI, too. That's it

 

wow, thats awesome.
my car just turned 134k miles, and mine is in wonderful shape too, but i didnt think i would dyno near that at all.
i have intake, headers, spacers, exhaust, neuspeed suspension...ext

i need to go to the dyno and see what i put down, hopefully around 250whp if mine is as healthy as yours...thanks for the vids man

 

torque seems really low though for the HP for the engine





also i see one MAJOR thing for the different dynos, first one the hood was shut, so heat soak is more then likely dropping those numbers some, compared to the second pull with it open, allowing the heat to escape (so the amount of power you gained is not going to be correct, since the hood being open is the norm usually)

 

wow, nice catch, but it still shouldnt be that much difference, especially if both runs were in good weather, or at least the same weather conditions

 

have you ever tried putting your hand on the intake manifold, after you had been sitting in traffic, with the engine fully warmed up? if not, it gets to the point where you can not even touch it for more then a couple of seconds
BUT then if you say try and touch it after like a long highway cruise, it's cool enough that it is just kinda luke warm, and you are able to leave your hand on it all day almost

so yes it could easily make a good 10-15 hp difference, if not more, when the motor gets heat soaked (even if the weather conditions are the exact same)





btw even then that fan they have seems kinda small to start with for trying to get full power when you are just sitting there





also OP, i would be bitching if they had tried to tie my car down like that on the rear, there are tie down points on the chassis, suspensions are REAL EASY to bend/tweak like that (it's better then hooking to the suspension arms themselves though)

 

When I dynoed it before the headers, we tried with the hood open and closed and didn't really make a difference. I have other vids on youtube for proof.

 

between the hood being closed and open, did you allow enough time for everything to cool down, and not be heatsoaked?

 

Yeah, everything's legit. The only factoring difference between the vids are the headers.

 

damn 204wtq is low.
what would cause it to be low i wonder?
anyways, now go run the 1/4 and lets see it on that too...gl

 

I don't know what would cause it to be low. I didn't really think it was that low I guess but now that I look at it, I don't know. All I noticed was that my torque curve was much better after the headers and that peak torque went up a little.

 

yeah your torque went from 194 to 204, but it should have been 204 to begin with and go up to about 214, at least from looking at most on here. The only people i saw with your torque numbers were people that had a bad imrc or needed a valve adjustment. your top end is right where it should be though..
get a 2.5" exhaust and you will feel the full affect of those headers...gl

 

Yeah, I know I need a valve adjust and spark plugs. I still have the original NGK's in there. And I figured I would need a valve adjust since I'm at 135k. And I need to get it done before the races on Friday.

 

nice! damn i need some headers too

 

YEAH it will make a difference for sure. Also, the engine torque dampers as well, which i am replacing next weekend myself...gl at the track

 

The numbers seem a bit "off" because you did these runs in third gear.

 

how do you know it was it 3rd gear?
we are supposed to be in 4th in our cars right?
damn, that means he would be even higher in the right gear..wow

 

We should be in the gear that is closest to a 1:1 ratio, which is fifth, but everyone dynos their car in fourth. The numbers wont vary much though.

The biggest thing here is both runs were done in third. The numbers themselves dont mean shit, the gains are what matters.

 

Ratios (:1)
Manual
1st gear 3.933
2nd gear 2.478
3rd gear 1.700
4th gear 1.250
5th gear 0.976
6th gear - 0.771
Reverse 4.008
Final Drive Ratio 3.286

 

looks like 4th..hmm, either way, if he was in 3rd, he was def. not in the right gear for the dyno.
hopefully we can see a 4th and 5th gear dyno to get a reference of the difference

 

5th is .024 away from 1.000, while 4th is .25 away - 5th is closer.

But as I said, the difference wouldn't be great. His numbers would be slightly higher however.

 

Yeah, but it would be nice to see the difference

 

You guys think I would have higher numbers if I did a 4th gear pull? That would be sweet! Either way took her to the track this weekend. Had a blast! wondering how I can improve 60' time?

 

What did u run at the track?

 

I ran a 15.252 @ 93.25. don't laugh! This is at 4500 ft. elevation. I had an 0.088 reaction time which I'm stoked about but 60' is still in the 2.4's and that decides the whole race.
http://www.youtube.com/watch?v=0P3CLSbL-qQ

A density altitude calculator tells me I would run a 14.113 @ 100.7 at sea level.
http://www.dragtimes.com/da-density-...ect+ET+and+MPH

 

Not gonna laugh since I've never even been to the track yet But damn how slow is that a4?

 

Yeah, my buddy was having a worse time getting out of the whole than I was. He bogged his turbo that time.

 

damn, altitudes make that much of a difference? 15.2=14.1?
You are running slower than a stock auto would be here in Florida, and its hot as hell down here....lol....gl

 

Yeah, its a huge difference with N/A cars. Turboed cars aren't affected as much, though, cause they create their own atmosphere in the intake but they're still affected too.

 

Sounds about right. I had a turbo car that was running 14.1 at 5000ft. I got to run it at about 3000 ft and pulled (in hotter temps then the 5000 run) a 13.7.

Nice to see the before and after. Nice job!

 

http://www.youtube.com/watch?v=E5CtH..._order&list=UL
Still gotta bring my 60' ft. down. I can't hook up at all.

 

i cant see anything... what was the time?

 

Cant see the time either but if I go off the video timer it looks like mid 14s.

 

it was actually 15.0 @ 94mph, I wish I could get mid 14's here. I need to bring it down to sea level and see how I do to make myself feel better

 

Do you have the actual charts when dynoed the before and after headers? Trying to settle a dispute at work.

 

Here you go, before and after charts

 

Thanks so much!