big air intake upgrade

Post by **180sx** » Thu Jul 24, 2003 2:55 pm

ok so i thought when i rubilded my head a good idea would be to upgrade air flow. :ylsuper so cut a big *** hole in the air box and run 5' aluminum hose sealed everything. car seems to run poorly it backfires air back into the intake and you hear a noise from throttle body that sounds like a baloon blew up also leaks torque and accelerates poorly what have i done

smeels alot like gas too.:help

Post by **Repo Man** » Thu Jul 24, 2003 2:55 pm

Hmmm, just a hunch, but I would probably just put it back the way you had it.

Post by **yeswepromise** » Thu Jul 24, 2003 2:55 pm

rebuilt*

Post by **MainEvent212** » Thu Jul 24, 2003 2:55 pm

haha did you seal that hole on the end of the pipe by any chance? that might be good to open up...but it seems liek it's not flowing very well...or you got something in ur intake that is no good

Post by **s0ldats** » Thu Jul 24, 2003 2:55 pm

ok, this may seem really dumb, but are you sure you didn't put the hole after the filter instead of before the filter?

also, check your MAFS..

Post by **powerdrifter** » Thu Jul 24, 2003 2:55 pm

Sounds to me like maybe something wasn't installed correctly when the motor was rebuilt like an accesory, sensors, vacuum hoses? Plus the rule of thumb is to UPGRADE only when the car is running in tip top shape. If you already got problems, fix those first. I say you got alot of double checking to do before you start modifying anything. Remember people, JDMSTYLE is about a clean installation.

Post by **Machine** » Thu Jul 24, 2003 2:55 pm

its a vacuum leak, you fuc ked up

Website · Post by **TurboKA37** » Thu Jul 24, 2003 2:55 pm

is the tubing where the MAFS mounted also 5" in diameter? if thats the case u will be running very lean

Post by **trpower7** » Thu Jul 24, 2003 2:55 pm

What in the world, this is horrible information. It's likely that you have a vacuum leak somewhere and it doesn't have anything to do with your ghetto-fied intake. As long as you cut in the actual box before the MAFS it shouldn't read inaccurately and will do exactly what it's supposed to. Sounds like a really bad vacuum leak to me, check all the hoses under the throttle body.

On a side note: I don't quite understand how a "clean install" is a "JDM install". The correlation is faulty. It's not as if Japanese Domestic Market is a religion and or textbook guide for doing things. It just means things sold in Japan. And not to judge, but to think you are cool because you're still driving an NA KA with some crazy body kit in the US......well.....that's just plain pitiful. Let's remember who rompified back in 41'-45' :ylsuper

Website · Post by **TurboKA37** » Thu Jul 24, 2003 2:55 pm

i dont think my post was uninformitive at all. its hard to tell how he has this intake setup and if its setup sort of like a hacked MAF hes leting alot of air by the MAF which means the A/F will be very high

Post by **trpower7** » Thu Jul 24, 2003 2:55 pm

The point is I HIGHLY doubt he decided to cut a hole in the tube AFTER the MAF and allow more air in. In cases like that the car won't even run. And even if he took off everything before the MAF and just left it open it wouldn't run that severaly bad, it would just be unfiltered air.

Website · Post by **TurboKA37** » Thu Jul 24, 2003 2:55 pm

i didnt say anything about the filter box being on or not. and i also highly doubt my senario is the case here, i was just putting out more possibilities that could be concluded from the information he gave us

Post by **U12 2NR** » Thu Jul 24, 2003 2:55 pm

it would be a wise idea to hear the specifics of the situation before further speculation is made. A picture of this airbox would be nice.

Post by **powerdrifter** » Thu Jul 24, 2003 2:55 pm

I think "trpower7" needs to put himself on check and fix his own ride before giving others advice on a clean install like I mentioned erlier. Go to the next upcoming D1 Grand Prix Challenge or Club 4AG Drift Day, and look at my ride. Clean enough for a car show, but I don't care for car shows myself. My car is set up for the Drift Circuit, for hardcore, aggressive driving. Look for a red 240SX with a white front bumper and black rims. I do all my talking on the track and not on the street.

JDM is the true path to performance!

[email protected]'89 NISSAN 240SX, '90 KA24E SOHC,5-spd conversion,'96 180sx turbo fuel pump,port & polished these:12v head (in/exh), MAF sensor (main inlet only), air filter adapter, throttle body, intake plenum, intake manifold, removed SCV valves (2nd butterflies) Injen intake, HKS SuperMega Flow Filter, HotShot Headers (w/ thermotec exh. wrap to cat-back exh. canister), custom 60mm straight exhaust (JDM), HKS Superlow Form Springs, KYB AGX shocks (adj.4/8), FR/RR strut bars, Nismo Chassis brace, Random Tech High Flow cat., custom 2.5" JDM style exhaust,HyperGround Wire System, Magnecor 8.5mm wires, Splitfire 3xPlatinum plugs, Nismo Radiator Cap (18psi/1.3bar), S13 VLSD, ENDLESS brake pads, Jun Lightweight Flywheel, Centerforce Dual Friction clutch,Optima Battery, Bomex body kit, about to be the 1st, FIRST! in the US with a JDM Ikeya Formula Complete body kit...

Post by **trpower7** » Thu Jul 24, 2003 2:55 pm

Your logic is faulty here. That's like saying I can't work on any cars or diagnose anything until mine is in perfect shape. Just not good logic. I don't daily drive my 240. I frequent this forum because I own one and have done extensive work on several. My daily drivers run exactly as I want them to. If we were all to go by this logic we would have hundreds of mechanics at home fixing their project cars because according to you unless all their respective cars are in perfect shape they have no right to diagnose or give advice to anyone else. 95% of the people in this forum wouldn't be on here because something was wrong with their car at the moment. It's just bad logic.

The issue of what your car is set up for is completely irrelevant here. Your issues with your car are your own.

"JDM is the true path to performance"????? What kind of twisted cult-ish motto is this?? Need we forget who started automobile performance and who has the longest standing record in it? Not to mention who invented the automobile in the first place. To say that Japanese Domestic Market products are the true way to performance is once again, faulty logic. Perhaps they are YOUR way to make YOUR car perform as you want it to, but as a blanket statement it just doesn't work. If I own an BGN (buick grand national) or a Corvette I should ditch them, because according to you, because I can't go with parts from the Japanese Domestic Market I won't be following the true performance path.

Post by **BadMojo** » Thu Jul 24, 2003 2:55 pm

JDM tyte-ness (yo!)&#174 aside, has 180SX had any luck fixing his problem? I think this was, after all, a thread about a problem with this poor guy's car.

I'm curious to hear how the car was running before the airbox mangling started. From the description posted, I wasn't sure if the car was running after the rebuild but before the "air intake".

Did you check for vacuum leaks? Check twice?

Post by **powerdrifter** » Thu Jul 24, 2003 2:55 pm

he's right. let's give it a rest, huh? I apologize to trpower7. Didn't mean to get you all hopped up.

Back to the subject. So far we all agree that he has a vacuum leak somewhere.

The best way to troubleshoot this is by the book. There is a picture in the repair manuals that shows all the ECCS components relating to exhaust and smog. In the Chilton's, the book shows a picture of each component and where it goes in the motor. It also shows numbers on the end of the vacuum fittings on each component. Follow each number and match it up with the same no. on the other component. The numbers are small so if you can't read a few, come back to them later.

At this point I'd replace all the vacuum hoses anyways (get silicone hoses and get that out of the way.)

There's also a thread posted on here for the AIV Valve. check the reeds inside if you haven't done so yet.

If you smell fuel, double check all the fuel lines, fuel filters including the one in the tank (very easy to ckeck), pressure regulator, and especially the injector O-rings.

JDM is the true path to performance!

[email protected]'89 NISSAN 240SX, '90 KA24E SOHC,5-spd conversion,'96 180sx turbo fuel pump,port & polished these:12v head (in/exh), MAF sensor (main inlet only), air filter adapter, throttle body, intake plenum, intake manifold, removed SCV valves (2nd butterflies) Injen intake, HKS SuperMega Flow Filter, HotShot Headers (w/ thermotec exh. wrap to cat-back exh. canister), custom 60mm straight exhaust (JDM), HKS Superlow Form Springs, KYB AGX shocks (adj.4/8), FR/RR strut bars, Nismo Chassis brace, Random Tech High Flow cat., custom 2.5" JDM style exhaust,HyperGround Wire System, Magnecor 8.5mm wires, Splitfire 3xPlatinum plugs, Nismo Radiator Cap (18psi/1.3bar), S13 VLSD, ENDLESS brake pads, Jun Lightweight Flywheel, Centerforce Dual Friction clutch,Optima Battery, Bomex body kit, about to be the 1st, FIRST! in the US with a JDM Ikeya Formula Complete body kit...

Post by **goshoryuken** » Thu Jul 24, 2003 2:55 pm

Vacuum leaks are no good :-\, had one in my 90 coupe . . . bogged and ran rough . . actually ran like **** . .then I got my mechanic to fix it up for me. Didn't cost too much

big air intake upgrade

big air intake upgrade

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