HELLFIRE! Posted October 29, 2008 Posted October 29, 2008 After Scootag posted his version of a cold air intake (CAI) system, I was motivated to build one for my Z. The set up I have to work with: .Twin SU type carbs ."Orange" 240Z Airbox So off to Shepparton to purchase the parts I needed, starting with repco. Repco had nuthin'. I crossed the road to Supercheap,...Nuthin'. Then I drove over to Autobarn and was met by a very helpful employee who helped me buy a 3 inch flex hose that extends to 1 meter, 1 air filter adapter mount and a large hose clamp. I then set about manufacturing a mounting plate for the end of my airbox. When this was complete I drove down to my local engineer and had him mig weld it to the inlet of the airbox. Below is a pic of the finished assembled product. Between the airbox mount and the hose mount is a gasket made from an unwanted stubby holder. This next shot is a closer view of the mounting plates. This final pic is of the unit installed. You can see in this last pic that the hose has a bit of trouble bending before it hits the radiator, but if I hadn't of cut off the first inch of the original airbox then the hose would never stood a chance. One other thing to mention is the mesh that is mounted behind the front grill. I was sick of stuff hitting my radiator so I decided to do something about it. It's hard to say if this mod has made any difference to performance or fuel consumption, but time will tell. If if has no affect either way, I don't care coz I like it and in my opinion it looks the business. Quote
Hunter Posted October 29, 2008 Posted October 29, 2008 I am not sure what air resistance the original air filter has compared to a pod filter. But if you took the original air filter out of the air box and installed a pod filter on the end of the hose, It could possibly improve performance a little more. But the way you have it setup now looks good and should be providing cooler air for the engine. Quote
XRQTR Posted October 29, 2008 Posted October 29, 2008 That looks neat and near factory, however with these types of hose you need to make sure they do not collapse under acceleration as some do, but ye looks good. Quote
chris240 Posted October 29, 2008 Posted October 29, 2008 cold airbox baaaaa.....try living in bloody Canberra when its minus 5 deg !! I need to divert a hose from my houses gas heating to my carbs ! Quote
Scoota G Posted October 29, 2008 Posted October 29, 2008 Bloody Awesome.. Did you try revving the car with one hand and feeling in the end of the tube to get an idea of how it's workin? Just hope none of the neighbours cats try to play hide and seek in the tube :S Quote
modular9 Posted October 30, 2008 Posted October 30, 2008 or snakes ! Hellfire : that looks very very factory/OEM/AWESOME! Paint it that odd red/orange and even the concourse nuts would have difficulties. Saved images to desktop for copying purposes. BTW ( slightly off topic ) I had a discussion with a manager of Supercheap and apparently the stores are "weighted" to the type of community there is. EG slacks creek in Brisbane has almost everything you need for a CAI but then there is a tuner's heaven Autobarn across the road The thinking is that the area has more DIY modders in the area than a "I dont know how to change my wipers" type of an area. So not all Supercheapautos/autonbarns are made the same. Quote
Hunter Posted October 30, 2008 Posted October 30, 2008 That would explain why you can only get gear knobs, steering wheels and seat covers from the stores here on the north coast of Tassie. LOL Quote
C.A.R. Posted October 30, 2008 Posted October 30, 2008 Looks good, Hellfire. Just needs a bellmouth on the front of the hose... Quote
HELLFIRE! Posted October 30, 2008 Author Posted October 30, 2008 I am not sure what air resistance the original air filter has compared to a pod filter. But if you took the original air filter out of the air box and installed a pod filter on the end of the hose, It could possibly improve performance a little more. But the way you have it setup now looks good and should be providing cooler air for the engine. Yeah, this set up is stage 1. Stage 2 would be to swap out filters and put a pod at the business end. I was talking to the guy at Autobarn about the pod filters and he said to be careful of too much forced air when using a pod. I would like to go down the pod path for 2 reasons; 1) Pods are a performance filter and 2) Pods are easier to get hold of than the old 260Z cartridge filter. Quote
HELLFIRE! Posted October 30, 2008 Author Posted October 30, 2008 That looks neat and near factory, however with these types of hose you need to make sure they do not collapse under acceleration as some do, but ye looks good. Cheers for the positive response. The hose has a fairly strong wire running through it so I doubt that it will collapse. Quote
HELLFIRE! Posted November 10, 2008 Author Posted November 10, 2008 Well I got round to fitting a pod to the business end of the intake hose. I'm not flushed with cash at the moment so I couldn't afford a K&N filter, so instead settled for a cheaper version. If you look carefully you can see that I have mounted an "air shield" on the windward side of the filter to hinder undue air pressure closing up the pod. So far I'm very pleased with the results. Quote
modular9 Posted November 10, 2008 Posted November 10, 2008 Hellfire : Can you ( or anyone else ) enlighten me on the too much airflow is too much ? I suppose it could blow the induction box off ? Anyway. With the pod what are the results. A better response ? Quote
Scoota G Posted November 11, 2008 Posted November 11, 2008 I just read this http://en.wikipedia.org/wiki/Cold_air_intake but it says nothing about too much air volume. With my setup you can really tell the difference inbetween 60-80 kmh. It really revs a lot more free in the Mid Range. Quote
HELLFIRE! Posted November 12, 2008 Author Posted November 12, 2008 I'm not convinced about there being an issue of too muck air/pressure with respect to pod filters after reading a few articles on the net so I decided to do a little experiment After driving with this set up for the last couple of days I have noted how she performs and will use these results as a benchmark. From cold I removed the air shield and then drove for about 10 minuets. I live on a highway so from my driveway I accelerate immediately to 100km/h. .The acceleration to 100 was without stutter or flattening off of power with the choke on. .The engine warmed up in the usual time. .However I believe the engine is running a fraction cooler than with the shield on. .Without choke (at operating temp) acceleration was flawless all the way to 160km/h from stand still. From this test I can only assume that: 1. there is no excess air pressure issue 2. The shield actually negates performance by disrupting air flow (cooling) That being said the air shield actually performs another function as a wet weather shield, so it still might get some use. This information must be taken as only being relevant to my set up and the filter that I am using. Perhaps a K&N high performance filter would fare differently. Quote
tbscobraZ Posted May 24, 2009 Posted May 24, 2009 Well measure fuel to air ratio. You should aim for 14.7 to 1. Air to fuel. Quote
modular9 Posted May 24, 2009 Posted May 24, 2009 Whats he supposed to do. Start a new thread and get bent over for not using the search function OR resurrect an old thread and get bent over for resurrecting an old thread. Now this is a good one to resurrect as it has some really good info. Quote
stevo_gj Posted May 25, 2009 Posted May 25, 2009 I think Lurch just enjoys bending over the guys, hehe Quote
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