2.5 Inch exhaust to small? - Page 2 - Lateral-g Forums

DaleTx · #11 09-15-2013, 01:29 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** · #12 09-15-2013, 03:24 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.

**FETorino** · #13 09-15-2013, 04:08 PM

Quote:

Originally Posted by Flash68

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.

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

The rest of us have to rely on hard facts.

**GregWeld** · #14 09-15-2013, 04:25 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** · #15 09-15-2013, 04:27 PM

Quote:

Originally Posted by Flash68

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.

Agree....

**Flash68** · #16 09-15-2013, 04:30 PM

Quote:

Originally Posted by GregWeld

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

Sure, but then Rob

will link some article that shows you that uncorked isn't always best for max power. You know, cold hard facts and stuff.

**FETorino** · #17 09-15-2013, 04:45 PM

Quote:

Originally Posted by Flash68

Sure, but then Rob

will link some article that shows you that uncorked isn't always best for max power. You know, cold hard facts and stuff.

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.

**GregWeld** · #18 09-15-2013, 04:50 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** · #19 09-15-2013, 04:52 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** · #20 09-15-2013, 05:07 PM

Quote:

Originally Posted by GregWeld

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.

Quote:

Originally Posted by GregWeld

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.