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I just wanted to share my recent dyno results for my 2007 C6 base. A little history on the car. I purchased it from the original owner last August with only 32k miles on it. LS2, M6, bone stock when purchased.
This summer I purchased and installed a set of TSP headers, non catted X pipe, and retained the stock mufflers. I took it to Late Model Throttle in Waukesha WI this week. Picked it up this afternoon and am very happy so far with the results. 375/377 to the wheels.
The car feels much better and the improvement in power was very noticeable to say the least. Future plans include head porting, and cam swap.
When I ordered the headers/x pipe I did not see a catted version available from TSP. I'm unaware if they sell one.
I like the gain in power, but am missing something in the graph. You gained 5hp for some reason, but no indication of what it is. I assume they did two pulls, but am wondering what was done between the two to gain 5hp and 7lb/ft.
You also did not say anything about getting a custom tune...did you? If not, that is where you will find much more power, with no other mods being done.
Yes, they do sell a catted version, but were out of it for a long time. I have the full set, with cats, in a box in my garage. Waiting for cooler weather to get under the car for the install.
Last edited by buckmeister2; 08-04-2021 at 05:47 PM.
I like the gain in power, but am missing something in the graph. You gained 5hp for some reason, but no indication of what it is. I assume they did two pulls, but am wondering what was done between the two to gain 5hp and 7lb/ft.
Difference could be ambient temperature and I’m sure it was tuned while on the dyno.
I like the gain in power, but am missing something in the graph. You gained 5hp for some reason, but no indication of what it is. I assume they did two pulls, but am wondering what was done between the two to gain 5hp and 7lb/ft.
You also did not say anything about getting a custom tune...did you? If not, that is where you will find much more power, with no other mods being done.
Yes, they do sell a catted version, but were out of it for a long time. I have the full set, with cats, in a box in my garage. Waiting for cooler weather to get under the car for the install.
Yes it was a custom tune. I used them after I did a DOD delete and Stage 1 TSP cam in my 13 Silverado. That custom tune yielded around 12hp/tq as well.
As far as the catted Texas Speed x pipe, I'm sure they were out of stock. As all of us know, inventory has been low on alot of parts. Get those headers and x pipe on! Even in hot weather, it's an easy job!
Yes it was a custom tune. Tuning shop stated most of the gains came from the headers/x pipe, with a small amount gained from their tune. I used them after I did a DOD delete and Stage 1 TSP cam in my 13 Silverado. That custom tune yielded around 12hp/tq as well.
Personally I’d install a catted mid section and sell the off-road. The 2 hp max loss is worth ditching the odor.
I do park in a garage, and still no door. Even if there was an odor, I wouldn't really care and let it bother me.
If you ever start engine mods you’ll notice it big time. I suffered through 2 years before I finally made the change back to high flow cats. That odor is clothing and skin penetrating.
[QUOTE=saplumr;1603828307]If you ever start engine mods you’ll notice it big time. I suffered through 2 years before I finally made the change back to high flow cats. That odor is clothing and skin penetrating.[/QUOTE
I did a cam swap in my Silverado and didn't notice it. I also built several Oldsmobile 455s and ran them through Hooker Super Comps/ 3inch Pypes exhaust in my 71 Cutlass and had an odor. Thanks for your concern, but once again it didn't bother me.
How does it sound with the stock mufflers? I'm contemplating longtubes with hiflow cats on my 2007 base too. Auto trans though.
74Plb
Each vehicle can sound different depending on mod combinations. Headers and hi flows will make a big diff but actually describing sound is virtually impossible.
How does it sound with the stock mufflers? I'm contemplating longtubes with hiflow cats on my 2007 base too. Auto trans though.
74Plb
It has a nice deep tone with the stockers. I was a little unsure about how it would sound, but I actually like it, and from what I've read, they don't hinder performance very much.
It has a nice deep tone with the stockers. I was a little unsure about how it would sound, but I actually like it, and from what I've read, they don't hinder performance very much.
You can also hear the tinny hollow header sound through them, which I like. The x pipe definitely gives it a nice touch too.
It has a nice deep tone with the stockers. I was a little unsure about how it would sound, but I actually like it, and from whatbase I've read, they don't hinder performance very much.
My 2007 base had Flowmasters on it when I bought it in 2017. I disliked them enough to trade a guy for his stock takeoffs straight across. I couldn't handle the drone . I asked a local tuner about a tune and he said to wait until I did long tubes and possibly a mild cam before spending the money on the dyno.
Thanks for the reply.
74Plb
Last edited by 74plb; 08-07-2021 at 10:59 PM.
Reason: Typo
08-03-2021, 11:15 PM
C6 LS2 dyno results
. I asked a local tuner about a tune and he said to wait until I did long tubes and possibly a mild cam before spending the money on the dyno.