BRM Exhaust for Christmas! XD
No where was the discussion about short LARGE diameter vs long SKINNY diameter, I was under the assumption we were speaking of the same diameter since the JWT and INJEN are essentially the same diameter.
But I see your point now and agree, you weren't clear before.
But I see your point now and agree, you weren't clear before.
If same dia...piping is used....same thing! Short piping Higher peak hp, less air friction.....longer piping, increased low end torque, killing higher horsepower do to air friction....My injen made more hp and torque than stock b(on the Dyno) but became a restriction at higher rpm and you could hear my engine bog in it's 2nd to 3rd gear change (during 1/4 mi runs) run multiple exhaust set ups with the same intake samething until I swapped to a shorter intake and compared my wideband readings at initial WOT all the way to redline....2nd to 3rd gear change bog gone and all it does now is pull seamlessly........
You guys should move this discussion to this thread; http://forums.maxima.org/5th-generat...i-rethink.html
Anyway: By now, I forgot if you posted any sound files. Like to hear the 2.5" BRM compared to my SR*S.
Last edited by BobPezz; Jan 14, 2012 at 06:48 AM.
CMax is 100% correct that a 3.5L will usually make better power with a SRI. Maxima King also has a point concerning low end loss on a 3.0L. TunerMaxima has discussed this since he's got cars with both engines. Bottom line; The engines have different power characteristics, all things being equal. 3.0L with ~10mm shorter stroke suffers on low end torque, but has good high RPM performance. 3.5 is the opposite, great low end but suffers at high RPM. The reason; 3.0L smaller displacement/stroke uses less air and isn't affected like a 3.5L from high RPM restriction. To help the 3.0L bottom end torque, long tube works well, to help the 3.5L high RPM breathing, short tube works well.
You guys should move this discussion to this thread; http://forums.maxima.org/5th-generat...i-rethink.html
Anyway: By now, I forgot if you posted any sound files. Like to hear the 2.5" BRM compared to my SR*S.
You guys should move this discussion to this thread; http://forums.maxima.org/5th-generat...i-rethink.html
Anyway: By now, I forgot if you posted any sound files. Like to hear the 2.5" BRM compared to my SR*S.
I'm not gonna say that the VQ35DE doesn't breathe up top...I'm just saying that the Injen Intake was too long @ 39" and was bogging my combination.....Try the Injen it might work for that VQ30DE-K (OP) I liked the Intake with the stock exhaust system but with a 2.5" Cattman, the 2.5" Cattman bpipe and stock rear Muffler,and my 3" it became a restriction on the intakeand I sold it!
That's because people talk out of there *** and just look at peak numbers and disregard the powerband, torque curve, or the fact that gains are going to come from a proper tune. At the same time for what some people are doing with their car they will see minimal gains from 2.5" to 3" and that's what makes it not worth it to them.
Yeah it's kinda wierd once these BRM guys install thier exhaust system you hear nothing about it.....no praises, no complaints, no feedback too the ORG whatsoever......You, I, many others regardless have let the ORG know about our thoughts and Praises of Cattman's exhaust products.....I just thought I would throw this out there to those BRM junkies!
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