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-   -   2.5 Inch exhaust to small? (https://www.lateral-g.net/forums/showthread.php?t=43070)

DaleTx 09-15-2013 12:29 PM

X2 ^^^

My car has a 670HP 427” and makes peak power at 6,900 rpm. I ran 3" exhaust with 2.5" tail pipes at first, and then switched to 3" tail pipes. After having tried both set ups… I would recommend 3” all the way for sure. I didn’t think the 2.5” would restrict it that much but when I made the switch… there was a noticeable difference up in the higher rpm range. The engine responded well with the larger diameter tail pipes. I don’t have numbers to back this up… just seat of the pants feel. Also, the 3” tail pipes sound better and have a deeper tone than the 2.5".

Flash68 09-15-2013 02:24 PM

No way I'd run a 2.5 inch exhaust on that engine with that power. I don't need science to tell me that. :D

FETorino 09-15-2013 03:08 PM

Quote:

Originally Posted by Flash68 (Post 505040)
No way I'd run a 2.5 inch exhaust on that engine with that power. I don't need science to tell me that. :D

But you're just more in tune with your emotional side than the rest of us. You just feel things.:rolleyes:

The rest of us have to rely on hard facts.

:cheers:

GregWeld 09-15-2013 03:25 PM

Gee ---- In the old days if we wanted max hp we uncorked the headers!


Seriously - how often do you need "max" hp on the street....

GregWeld 09-15-2013 03:27 PM

Quote:

Originally Posted by Flash68 (Post 505040)
No way I'd run a 2.5 inch exhaust on that engine with that power. I don't need science to tell me that. :D



Agree....

Flash68 09-15-2013 03:30 PM

Quote:

Originally Posted by GregWeld (Post 505061)
Gee ---- In the old days if we wanted max hp we uncorked the headers!


Sure, but then Rob :y0!: will link some article that shows you that uncorked isn't always best for max power. You know, cold hard facts and stuff.

:rules:

FETorino 09-15-2013 03:45 PM

Quote:

Originally Posted by Flash68 (Post 505065)
Sure, but then Rob :y0!: will link some article that shows you that uncorked isn't always best for max power. You know, cold hard facts and stuff.

:rules:


Next time I'll just post "I feel a 3" pipe will really wake that motor up" since that seems to be what you want.:lostmarbles:

:action-smiley-027:

:cheers:

GregWeld 09-15-2013 03:50 PM

I'm not arguing with Rob --- he carries the GOLD Starbucks card and sadly -- Flashy -- you don't.


Coffee makes me FEEL like I have more HP and makes me rev more freely too! So I gotta go with my seat of the pants evaluation.


Technically -- I think it's just the caffeine...

GregWeld 09-15-2013 03:52 PM

BTW DAVE --- Have you ever walked SEMA with ROB and RON????


They go from booth to booth - never really seeing the killer cars or the hot chicks -- but man can they talk smack with the engineers!


HAHAHAHAHAHAHAHAHA

FETorino 09-15-2013 04:07 PM

Quote:

Originally Posted by GregWeld (Post 505077)
I'm not arguing with Rob --- he carries the GOLD Starbucks card and sadly -- Flashy -- you don't.


Coffee makes me FEEL like I have more HP and makes me rev more freely too! So I gotta go with my seat of the pants evaluation.


Technically -- I think it's just the caffeine...

I thought Dave was already on the hook for your Coffee this time. :mock:

Quote:

Originally Posted by GregWeld (Post 505078)
BTW DAVE --- Have you ever walked SEMA with ROB and RON????


They go from booth to booth - never really seeing the killer cars or the hot chicks -- but man can they talk smack with the engineers!


HAHAHAHAHAHAHAHAHA


I'm calling BS and offer a pinhole camera photo of the #1 reason to go to SEMA last year as evidence of my focus.

Don't hate me cuz I'm a multitasker.

:cheers:


http://i291.photobucket.com/albums/l...ps4292a6d4.jpg


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