ok i have looked and couldnt find this on here anywhere but if it is sry for re posting. I have JRSC on a zx3 2003 and what to know what kind of intake would be the best besides the BBK.

From what I've gathered roots style blowers don't like to pull hard for their air (AEM cold air intake is out of the question since it makes the blower work hard for the air and is around 2.5" before throttle body). The highest output setups I have seen are running the svt airbox and snorkle w/ a k&n filter. I am running a 3" maf housing off the blower to 3.5" piping to the filter w minimal bends. Keep it simple and no smaller than 3"
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From what I've heard and read making some kind of CAI yourself works great. Idk about the sizes and what not but the JRSC runs pretty hot so cold air is always better.

Agreed, I can't see how my custom intake could be any better flowing/colder air. UNLESS I had a hood scoop and short ram intake
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I'd go CAI, even if you have to go a little oversized and get a retune.

From what I've heard and read making some kind of CAI yourself works great. Idk about the sizes and what not but the JRSC runs pretty hot so cold air is always better.

you heard wrong.


Get an SVT airbox with a K&N drop in.

these blowers do NOT like to work for air at all. If you must get some kind of other intake, use a Volant or old Focus central "box" style.

Oscar Jackson himself dynoed these blowers with all different intakes, and the SVT airbox edged them all out by like 2-3 whp.



oh, and to the OP, the BBK is not an "intake", its basically a smaller pulley and a retune.

you heard wrong.


Get an SVT airbox with a K&N drop in.

these blowers do NOT like to work for air at all. If you must get some kind of other intake, use a Volant or old Focus central "box" style.

Oscar Jackson himself dynoed these blowers with all different intakes, and the SVT airbox edged them all out by like 2-3 whp.



oh, and to the OP, the BBK is not an "intake", its basically a smaller pulley and a retune.

it also comes with the SVT intake stuff

I'm telling ya I would run a CAI... I would run a 3" CAI and get a retune for it... that way your getting the coldest air possible and the 3" piping will ensure the blower doesnt have to work hard.

But what do I know about making power......... not to mention EVERY Mustang with a roots blower on it runs the same style setup.

the mustangs also have blowers 3 times the size of the little M45 the OP is talking about.

WOW, REALLY?!?!?!

It makes no difference the principles still work the same. The larger intake tube size makes it easier for the blower to suck in air and lets face it the TINY JRSC needs the coolest air possible to perform correctly.

lol, ok.

I am just going off what Oscar Jackson himself found out by dyno testing damn near every intake available for a JRSC. When I had my regular zetec supercharged with the JRSC and custom BBK, the SVT airbox was the most efficient and produced the most power. I researched that for about 2-3 weeks before I finally bought decided which to use. Granted, this was 4 years ago......

I chose to use the Volant, because I wanted more blower whine.

modify a svt cold air intake to work. hands down i performs better then the stock air box. i had mine running throu the stock air box and even custom made a connection between the MAF and TB with a 3" silicone turbo coupling. i got tired of the lack in power and muffled sound. so i modified my cold air by removing part of the bend at the TB end and it worked and responded so much better. yeah the svt box may as you say give you 2-3 hp at say 7000 (which i highly doubt). but do a consistant dyno comparrison on a heat soaked blower with the same temp air from a restricted box. and yes it is a restricted box. look at the size of the opening that air funnels throu from the snorkel to the bottom of the box. 2"s at most. then compare to the colder air provided by a cold air intake and the results are better. the cold air intake provides more volume of air and at a colder temp to the blower. the larger amount of air provides you with a better throttle response and accel. i myself could tell a major diff in accel and the sound is also a nice touch. think about it this way. if you cant hear the sound of the blower with a stock air box due to the sound being muffled. then how do you expect it to gain perfromance. if sound cant get out they i highy doubt air can get in as easlily. a cold air is a straight shot to the TB.

oh and just some food for thought. think about it like this. a roots style charger works on the same priciples really as a NA engine as far as air consumption. it doesnt like to pull throu any restrictions. and if it does pull throu restrictions it looses hp. so if thats the case then why do nearly every NA build results in an aftermarket intake to free up air going into the engine due to the crappy stock intake causing a restriction. some people stand by the svt intake. i say it has flaws and is not as effcient as most think. but hey to each his own. my set up with the cold air intake woke the car up and was like night and day diff.

oh and just some food for thought. think about it like this. a roots style charger works on the same priciples really as a NA engine as far as air consumption. it doesnt like to pull throu any restrictions. and if it does pull throu restrictions it looses hp.

Thats why I recommend running a 3" intake setup including a 3" MAF... Most of the JRSC guys need to get away from the black box and get a tune anyways... besides if you have one of Toms tunes he'll give you a free tune upgrade with this mod.... its a win win.

ok ill deff have to do that

Orange is right the less restrictive the better, I have a Pipercross intake, we did a test and there was a 5whp difference between a 2.5" intake hose and a 3” hose and still another 2whp with no hose on the front of the intake at all, and this was dont on a dyno

Orange is right the less restrictive the better, I have a Pipercross intake, we did a test and there was a 5whp difference between a 2.5" intake hose and a 3” hose and still another 2whp with no hose on the front of the intake at all, and this was dont on a dyno

so..the most power was made with no hose at all (basically an enclosed filter short ram)....the hose has the same effect as teh piping on a CAI...it makes the blower work harder for its air...

albiet 2 whp isnt that much, it still proves that the short-ram enclosed style air intake system makes more power.

it will only need to work if it is not big enought pipe

A short ram will make the most power, but in my opinion I’ll sacrifice some power to have good cool air to the SC. My set up will still heat soak a little as the car sits and idles but it clears out quickly. I have not compared what I have to the stock SVT air box though that would be interesting to see how it works. I’ll post a picture of my set up later this week.