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fuzzion
12-12-2012, 06:54 AM
I have t2871r 800cc powerfc MAP and the works. Fully forged engines with high cam

What is MAX hp i can get from the entire stock exhaust system with stock extractors and stock downpipe. No decat.

I hear 350 to 400 is pushing it and that 330 is safe.
blueshark123
12-12-2012, 07:17 AM
Your doing it wrong.......
jsu1012
12-12-2012, 09:50 AM
lol, why wouldn't you upgrade the exhaust? but here is the link you're probably looking for.

horsepower rating on stock exhaust (http://hahgay.com/)
fuzzion
12-12-2012, 08:12 PM
My country is very strict. Im not allowed to modify any parts of the exhaust. so thats why Im asking
240jake
12-12-2012, 09:48 PM
sounds like an emergency, quick move to a country that doesn't suck!
BlacknboostedS13
12-12-2012, 10:55 PM
lol, why wouldn't you upgrade the exhaust? but here is the link you're probably looking for.

horsepower rating on stock exhaust (http://hahgay.com/)

ahhh, that was very informative. Thank you. I'll be sure to pass that bit of information on in the future.
waxball88
12-12-2012, 11:11 PM
Get an exhaust cut out
codyace
12-12-2012, 11:36 PM
What country are you in?

With a common setup with a GT2871r, I wouldnt 'see why couldn't squeak out 350 whp wth a stock exhaust. To me it would be better spent getting a 3" downpipe/cutout, but I can understand your countries rules and regs.
fuzzion
12-12-2012, 11:38 PM
Singapores top tuner says 300-330 with decat. If anyone disagrees, please post your reasons.
blueshark123
12-13-2012, 11:41 AM
Its doable for 300 range power, but i would do a cutout if u can
fliprayzin240sx
12-13-2012, 07:54 PM
Singapores top tuner says 300-330 with decat. If anyone disagrees, please post your reasons.

Can you get a high flow cat? If you can, I'd go that route. I wouldnt wanna get my ass caned for modding cars. :facepalm:
codyace
12-13-2012, 08:13 PM
Singapores top tuner says 300-330 with decat. If anyone disagrees, please post your reasons.

It would be close on the stock exhaust but I think possible.


Can you get a high flow cat? If you can, I'd go that route. I wouldnt wanna get my ass caned for modding cars. :facepalm:

QFT!
fuzzion
12-13-2012, 08:59 PM
Thanks for the input.

1) Does anyone sell a duplicate looking downpipe made of stanless steel, with the same bends etc like the original

2)My country allows me to mod one thing -->Mufflers, bt they must be approved with jasma cert and jvi cert. So far only one company has one that seems approved (according to singapore HKS distributor that can provide all the paper work) HKS Hi-Power Muffler Nissan Silvia S14 Turbo

From our previous poll, everyone says 300 to 350. What HP increase would i now get with that muffler
fliprayzin240sx
12-13-2012, 09:04 PM
What the heck is JVI? I've never heard of that certification before. From a quick glance thru google, something to do with noise?
fuzzion
12-14-2012, 04:59 AM
What the heck is JVI? I've never heard of that certification before. From a quick glance thru google, something to do with noise?

Yes, DB level and other emissions.

Im feeling really farked up becuase now i know i cant ever hit 400 legally. ANd yada yada yada, i know, 350 is good enuf. FU regulations :rant2: