totallimmortal

Has anyone ever done this i diodn't find anything with search and i was thinkin about it since it'd be free and i don't want a heaer since i am doing a turbo soon

SirCygnus

iTrader: (1)

for 200 bucks, it aint worth it imho.

M.C. Language

turbo??? if it isn't spend that 200 bucks on a mean set of headers.

gray 87 fc

he said it would be free no 1 said anything about him having to spend 200

ddub

I've heard of people doing it, just port match the manifold to match the gasket, that'll be the most you can do probably.

DEZERTE

Lol omg, i was JUST telling my friend (who just installed headers on his sr20 NX) "What if somebody got so desperate they ported the stock manifold"
Rofl..

ddub

It's not desperate really, its just like porting intake manifolds, same concept. Every little bit helps.

DEZERTE

I guess, i wasnt really saying he was desperate, we were just joking around about it, and it was crazy to see this on the forum when i get home

scathcart

It is desparate. True, every little bit helps, but you have to think about negligible gains. By smoother out the casting in the exahust bathtub, are you going to significantly increase flow? Not likely. Would you notice a gain in hp? No chance, it would be fractional.

Why spend hours porting for no measurable gain?
Its the same thing as taking your insurance papers, and cutting away all of the paper where there is no writing. This would save weight, and every little bit of weight loss, helps, right?

Tofuball

You wont gain anything. The manifold holes are almost already the same size ports out of the engine.

totallimmortal

ok well i don't care about the time i have that and it wouldn't take much time with the tools we have. What i want to know is there sufficient material to port away and what about the difusers in there does removing them help? Every little bit helps when your only trying to gain a tenth or so in the 1/4. My goal is to run a 14 with a stock port NA

scathcart

You need to ahve the engine apart to take out the exhaust diffusers.
Did you not read what was posted? You will see no measurable gain in power! We are talking fractions of a hp!
Instead of spending 2 hours porting, go to work. That will put you at least $16 closer to buying a header.

totallimmortal

Like i said i will not spend mnoney on something i'm htrowing out when i get a turbo so please don't say get a header. And have you ever dyno tesded one to prove these fractional HP gains? And like i said it may only be a fraction of a hp that i need to get me to pull a 14

Lat time i was at the track i had intake and exhaust, and ran a 15.2 since then i got new and wider tires, ported the tb, and got a safc

Hollywood56

actually porting the exaust manifold does help.Not a major diffrence but good for a good 2-5 hp.

SirCygnus

iTrader: (1)

not really. look at how the stock header is. it slams into a wall and does a 90 degree turn. you cant port that. the best thing to do is junk it and spend the 200 on a manefold. also, is your car a non turbo? might as well get the whole engine of a t][ in there cus its going to be pita.

scathcart

Where are you getting these numbers from? I'd like to see the dyno.

DEZERTE

lmao, nobody is going to waste their time porting a stock manifol and then waste money dyno'ing it.
I think he just made the #'s up

Tofuball

What are you even going to PORT? theres nothing to port on that thing! Its a bloody 90 degree elbow with huge holes in it!

jon88se

Porting is s term used way too loosely in this industry, especially within the rotary world. Porting is almost like an artform with the rotary engine and I've seen some very beautiful work and then again some pretty nasty stuff. Knowledge in porting comes from either trial and error or flowbench testing...On a different note, I saw some GORGEOUS work on a brideported FD motor last night @ J&R (Smokin Joe) last night!!

scathcart

My point exactly. Everything about this idea is a huge waste.

Wicked_razor

your right, every little bit helps, maybe just the manifold wont do much, but the manifold and your intake combined might help for a few good hp

totallimmortal

I'm sorry but i've gotta say it some of you are stupid, I said i wonb't send the money on a header so please no1 says that i'm looking to see if anyone has ported a stock NA exhaust manifold. It can't hurt and anything can be ported it there is material there to remove i know it won't be anything huge i'd be happy with an extra 3-5 hp for free wouldn't you? And you ask what i will be porting probably the exit of the manifold ported to match the gasket, the reson i ask is becuase we did it to a 300zx the other day and it did help now if someone is willing to give me info please do but i don't need anymore bullshit if you don't like the idea then don't post about it and go on and post in a thread that you like

scathcart

So no any criticism that isn't in your favour is negative and unwanted?

I've built plenty of engines and watched people do the exact same thing as you're going to do. It doesn't do anything. I am speaking from personal experience. You have no experience in this subject; if you did, you would not have to ask.
Ignoring the advice of those who have "been there, done that" is just stupid. Why repeat the mistakes of others?

Tofuball

If you think it is worth it, do it. Dont call people stupid, thats totally unnessisary. You wanted peoples opinions, and you got it. If you didnt want the answers to your questions, dont ask them!

I personally think it is a waste of your time, you obviously don't, so go do it and enjoy your car!

totallimmortal

Yes but some of you claim to know what benifits or not it yeild but no one has any proof, and no one said that they had done it before and that is what I asked so maybe i should just say to answer my question if you post and thats all