CAMARO6

CAMARO6 (https://www.camaro6.com/forums/index.php)
-   V8 LT1 Engine, Exhaust, and Bolt-Ons (https://www.camaro6.com/forums/forumdisplay.php?f=231)
-   -   Bolt-ons and not very happy with results.... (https://www.camaro6.com/forums/showthread.php?t=559978)

MrRuss 08-09-2019 06:11 PM

Bolt-ons and not very happy with results....
 
Hey Forum,

Here's what I did:

Roto-fab dry CAI - installed by me
Soler Engineering TB - Installed by me

Car ran fine no issues, somewhat better throttle response for a couple weeks

Next, (all installed by local speed shop)
Speed Engineering 1 7/8 long tubes
Speed Engineering 3" catless mid-pipes
Stainless Works NPP 3" in axle back
Flex fuel kit
Tune for E85 and 91

Dyno was 419HP and 448TQ (said it was because E85 was more like E50?? and a HOT day, >100 degrees) :thumbdown:

I was thinking should have been more like 440HP. Car is definitely quicker but is just too loud for my taste. I'm talking "piss off the neighbors" loud. I know I'm 53 but dang I'm not THAT old. I've been driving in Stealth mode and still too loud. I had the same set-up (almost) on my C5 Corvette and it wasn't nearly so loud, it did have catted mid pipes tho. I like a good deep growl but sheesh. I keep setting off others car alarms at work when I start it.

If I go with 3" in/out cats will that tone it down (and make it legal) or should I do something else?

FYI, I have factory NPP and had been driving with fuse 51 out and liked it but a little louder would have been fine with me. This is A LOT louder.

Any advise will be appreciated.

https://scontent-lax3-1.xx.fbcdn.net...32&oe=5DD0E7C0
https://scontent-lax3-1.xx.fbcdn.net...93&oe=5DE94C90
https://scontent-lax3-1.xx.fbcdn.net...c7&oe=5DC7C09B
https://scontent-lax3-1.xx.fbcdn.net...82&oe=5DC9E24E

Yes, 1 spark plug boot is touching the header on each side so I have heat shields on the way.

Link to start-up video:
here

oslouie 08-09-2019 07:11 PM

So you're saying you dyno'd 419hp after all parts were installed? If so, that doesn't sound right. Might be in the tune. As for the sound, should have done headers first to see how tolerable it is and go from there. I say switch back to the OEM exhaust and see if that does the trick.

MrRuss 08-09-2019 07:49 PM

Quote:

Originally Posted by oslouie (Post 10592744)
So you're saying you dyno'd 419hp after all parts were installed? If so, that doesn't sound right. Might be in the tune. As for the sound, should have done headers first to see how tolerable it is and go from there. I say switch back to the OEM exhaust and see if that does the trick.

I had heard a stock NPP with headers and did not like it, that's why I went with the Stainless Works NPP.

oldman 08-09-2019 09:27 PM

tune sucks. and really since we are talking corrected HP, it is making more even less HP to the wheels. What is the uncorrected HP? Also all that no-cat SS 3" stuff does not add much HP... just saying. check for burned plug wire too.

TJay74 08-10-2019 07:51 AM

I am gonna agree with Oldman, the tune is suspect.

Most of the HP gained from E85 is had by the time you hit E50. On a N/A engine from E50 to E85 you are only going to see 5-7 more rwhp.

With similar mods as you during he heat of summer I made 424rwhp with catless headers, Roto-fab CAI, and a Pray ported TB/IM combo. When I added E85 to the car and retuned I got the gas tune to 431rwhp on 91 and 455rwhp on E85 that was at E60.

6spdhyperblue 08-10-2019 08:03 AM

Get the intake manifold ported by pray. Can you post the dyno graph

MrRuss 08-10-2019 08:33 AM

Quote:

Originally Posted by oldman (Post 10592826)
tune sucks. and really since we are talking corrected HP, it is making more even less HP to the wheels. What is the uncorrected HP? Also all that no-cat SS 3" stuff does not add much HP... just saying. check for burned plug wire too.

419 is at the wheels from the Dyno graph.

MrRuss 08-10-2019 08:37 AM

Quote:

Originally Posted by 6spdhyperblue (Post 10593004)
Get the intake manifold ported by pray. Can you post the dyno graph

Don't yet have the file in hand, they are supposed to email me. Said if I come back with a fresh tank of E85, they will run it on the Dyno again.

I did and am still considering the Pray ported IM.

MrRuss 08-10-2019 08:39 AM

Quote:

Originally Posted by oldman (Post 10592826)
check for burned plug wire too.

Will do. Headers are coated tho.

6spdhyperblue 08-10-2019 08:45 AM

Cordes might be close to you... they can port as well

Gunkk 08-10-2019 09:10 AM

What was the dyno baseline?

What lambda was the car running post-tune for 419hp?

And what about torque before/after?

MrRuss 08-10-2019 09:33 AM

Quote:

Originally Posted by oldman (Post 10592826)
Also all that no-cat SS 3" stuff does not add much HP... just saying.

I figured that but I wanted to get rid of the AFM valves altogether. The SE LT's with the full length 3" mid pipes was only $650. Plus the LT's outlets are 3" and so are the SW NPP mufflers inlets.

MrRuss 08-10-2019 09:36 AM

Quote:

Originally Posted by 6spdhyperblue (Post 10593017)
Cordes might be close to you... they can port as well

I know, I wanted go with them first but they wouldn't touch the SE LT's and thier tune was much more expensive. I went with Extreme Motorsports cause they did my C5 Corvette years ago and did a great job.

6spdhyperblue 08-10-2019 10:47 AM

Quote:

Originally Posted by Gunkk (Post 10593030)
What was the dyno baseline?

What lambda was the car running post-tune for 419hp?

And what about torque before/after?

Yup that’s partly why I wanted the graph to see the lambda


All times are GMT -5. The time now is 06:14 PM.

Powered by vBulletin® Version 3.8.9 Beta 4
Copyright ©2000 - 2024, vBulletin Solutions, Inc.