Doug Thorley Shorty Headers - Dyno is In!

[BaylorCamaro]

I'm curious to see other dyno test with these headers.. Seems like awesome gains, if I could get more than 5hp/tq with these, then it seems like these are the shortys to get.

[John VS]

I'm curious to see other dyno test with these headers.

I'd love to see them too. I believe at this moment I have the only set. I could be wrong, but I think this is the first production batch.

Next month I will be getting an intake (Injen unless Vararam comes through). If I can find someone in OC who'll give me dyno time at a good price, I would love to run it again for comparison. So if there's anyone who reads this who knows a place to get a dyno done in OC, let me know.

[Ivan @ Southwest Speed]

YeeHaw!!!

Nice job!

Thanks for posting your info!
Ivan

[mrray13]

Originally Posted by BaylorAirForce

scrming, just curious what gains did you see with your shorty headers?

Originally Posted by scrming

Not much... Mrray13 showed about 5 rwhp... I seen a small improvement in my 0-60....

Yep ~ 5rwhp and 8lb-ft of torque.

Originally Posted by BaylorAirForce

Even with the Trifecta tune you didn't see much? I mean 5rwhp isn't that bad, but anything below that..

Never ran them with the tune, so no idea what they would have produced. I'd guess another 2-3 rwhp and 2-3lb-ft of torque.

Originally Posted by scrming

Yep.... But it sounds so good!!!!! in fact I am sitting on my front porch randomly remote starting my car so I can listen to it!!! (digging this iPad thing.. Lol)

Yes they did! Definitely a nice aggressive note!




All that said, I'm not for sure the DTs will make much more power then the JBAs did. Those numbers look really, really good though, and I hope they are accurate. Of course, like scrming hinted at, different dynos, different results, lol.

[BaylorCamaro]

Originally Posted by mrray13

All that said, I'm not for sure the DTs will make much more power then the JBAs did. Those numbers look really, really good though, and I hope they are accurate. Of course, like scrming hinted at, different dynos, different results, lol.

Stupid variables

[Wizzer]

Originally Posted by scrming

Yep.... But it sounds so good!!!!! in fact I am sitting on my front porch randomly remote starting my car so I can listen to it!!! (digging this iPad thing.. Lol)

lol Nice.. I was checking my posts on the Ipad also. Makes a lazy man lazier now. Now i don't even have to sit upright at my desk to check the internet. Now I can lay on the couch.

Now they just need Ibeer.

[scrming]

Originally Posted by Wizzer

lol Nice.. I was checking my posts on the Ipad also. Makes a lazy man lazier now. Now i don't even have to sit upright at my desk to check the internet. Now I can lay on the couch.

Now they just need Ibeer.

Got the IWife to get the beer...

[csjcsj]

How much different does it sound with the shorties. and do you still have stock exhaust, or an after market. give us a vid of the sound.........

[John VS]

Okay, I promised I'd report on the sound/power changes.

Both are noticeable improvements. The sound is dramatically different. I've put 7000 miles on the car with just the DT Catback, so I know how this car sounds. The headers really changed things. It's actually quieter at cruising speeds and the rasp I would sometimes get around 4500 rpm is basically gone. I would describe the sound as smooth.

It's not boomy or intrusive in the cabin, but it roars when you step on it. I made a little video that gives a sense of it. If anyone knows how to embed this, please do:



As for the power, there is a difference. The dyno shows about a 8-14% gain in torque. I'd say that's about what if feels like. 10% isn't overwhelming but it is noticeable. If I had a Dashawk, I suspect I'd have dropped at least a 10th of my 0-60 time.

I did do a run on the on-ramp from 0-70. Usually when I punch it, the tires chirp a bit before they catch. This time, I heard them rotate on the pavement. It sounded like pulling a single sheet of paper out of a pack and the car slid over a bit before it caught pavement.

So, the sound is fantastic (to my ears). The power increase is there. I wish I could confirm it on the track, but the nearest one is an hour away. Hopefully I'll be able to afford another dyno run after I get my intake replaced.

[rtcat600man]

Originally Posted by scrming

Got the IWife to get the beer...

[csjcsj]

Sounds good. Almost sounds like my LS3 does ont he inside upon acceleration. Thanks for the video......

[deljaso]

Originally Posted by John VS

Okay, I promised I'd report on the sound/power changes.

Both are noticeable improvements. The sound is dramatically different. I've put 7000 miles on the car with just the DT Catback, so I know how this car sounds. The headers really changed things. It's actually quieter at cruising speeds and the rasp I would sometimes get around 4500 rpm is basically gone. I would describe the sound as smooth.

It's not boomy or intrusive in the cabin, but it roars when you step on it. I made a little video that gives a sense of it. If anyone knows how to embed this, please do:



As for the power, there is a difference. The dyno shows about a 8-14% gain in torque. I'd say that's about what if feels like. 10% isn't overwhelming but it is noticeable. If I had a Dashawk, I suspect I'd have dropped at least a 10th of my 0-60 time.

I did do a run on the on-ramp from 0-70. Usually when I punch it, the tires chirp a bit before they catch. This time, I heard them rotate on the pavement. It sounded like pulling a single sheet of paper out of a pack and the car slid over a bit before it caught pavement.

So, the sound is fantastic (to my ears). The power increase is there. I wish I could confirm it on the track, but the nearest one is an hour away. Hopefully I'll be able to afford another dyno run after I get my intake replaced.

Great video, thanks! It sounds really good. Do you have any pics of the headers?

[3GPa]

Great Job on the video.. Sounds awesome man!

[BaylorCamaro]

Sounds great, I'm really considering this!