mr.turbo

howdie guys,

first of all - yes , i did a search ... but one question is still burning under my fingernails :

i got a blitz nur-spec under my '07 evo IX -

anyone got an idea (maybe dyno-run) of the HP-difference using with or w/o silencer ??

means, really enjoy the music of the blitz catback, but on highway-use it's kinda annoying ...

btw.: is it really necessary do unclamp the battery everytime i swap the silencer in or out (so the ECU can learn from scrap) - or will the ECU "remember" the parameters ??

TIA,pat.

Kdash106

iTrader: (11)

when i put my silencer on i feel like the car is a bit slower, but that's just me, so i am assuming that there's gotta be HP difference, i normally don't floor it when i have my silencer on. It probably restricts better airflow, and u don't have to unclamp the battery every time.

chaotichoax

iTrader: (149)

silencers are HUGE restrictions...if I remember correctly there was some dyno testing done on nasioc with a silencer and it robbed upwards of 25~ whp

mainly because it kills your exhaust flow to a point it's almost choking it

mr.turbo

... like i felt

thx for the hint with the battery-thingy, now i'm cool bout that

in comparison to the stock exhaust - would you say blitz+silencer limits exhaust flow more or less ??

TIA,pat.

Kdash106

iTrader: (11)

i thould think that the stock exhaust flows better then the blitz+silencer, but i am not sure.

mr.turbo

... 25hp DAMN !!

that means i can gain up to 20hp with the blitz over the stock catback - and lose 25hp when using w/ silencer - thats 5hp less than stock *eeek*

anyways, minus 5hp with the option for plus 20hp by turning 1 screw is a nice deal IMO

regards,pat.

Kdash106

iTrader: (11)

lol i don't even put the screw on mine, it stays in there pretty good. PITA taking it off thou.

mr.turbo

i got my screw in the silencer - in the trunk *haha*

... just in case

mrdevo

iTrader: (4)

Dynoflash had a customer I believe who had a hks(?) silencer, lost almost 50whp as I recall. Not sure if it was tuned yet or not. The losses were substantial to say the least..

heel2toe

iTrader: (41)

Forget the silencer. They kill your power plus IMO they look like crap. Now I know you already bought the exhaust but if I were you I would rock the factory catback with a QTP electric cutout. Best of both worlds

pls1968

iTrader: (20)

I went from 534hp to 506hp when I installed a silencer and let me tell you it didn't silence anything. This thing is coming off as soon as I get a chance to remove it.

tc17

iTrader: (23)

i have an active silencer on my new 3 inch custom exhaust with Jun BL titanium canister. the exhaust sounds almost stock. you lose a lot of power when running a silencer. butt dyno on my previous set up(3.5 inch exhaust with titanium canister) felt like a loss of 100hp. takes forever for the car to spool also.

i solved the issue now with a flick of a button. also there are better options than qtp.

C6C6CH3vo

iTrader: (9)

For a turbo the best HP is had with no restriction at all from the low pressure side of turbine to tailpipe, torque is a little more resistant. The limiting factor boils down to the smallest diameter i.e. exducer/WG, O2 housing outlet, catback, muffler.

See for yourself, run an open downpipe with large diameter O2 housing

mr.turbo

hey guys,

thx for ya massive input

btw.: besides power issues, when i put the silencer in, my exhaust is only whispering ... just like stock

l8r,pat.

evokid511

iTrader: (24)

they limit your power and make you look like a ricer IMO they look horrible especially if you have an evo