intake suggestions
 

I am starting to piece together a combination for my 94 mustang GT. I plan on supercharging and already have a gt-40 lower intake that's been ported. What's a good upper intake for blown applications that works with a gt40 lower and should I change any other part of the intake such as MAF, throttle body, etc.?

What heads are you running? Stock E7's?

If you are planning on keeping the stock heads, then just put a Cobra/GT40/Explorer upper intake on that lower and call it a day.

If you will be using any aftermarket heads, I would ditch the intake and go for a holley systemax, performer rpm II, or the new short runner trick flow intake.

MAF should be upgraded as well, as you will need larger injectors, so just buy a MAF calibrated for those.

throttle body should be atleast a 70mm for a blown car, maybe 75

what are your overall plans for it? We need to know this before we can help you decide on individual parts.

I plan on keeping the stock heads, my budget doesn't really allow for upgrading all of those components as well. Right now I'm planning on using a Vortech S-trim supercharger. I had looked at C&L's 76mm MAF setup but am not sure if any other modifications need to be made when changing injectors/maf in regards to the FMU that Vortech kits use. The car is a nice weather daily driver in the summer and my goal is 400-500hp but if I can't meet that with my setup that's ok.

intake
 

What Drew said. Stay with the Ford stuff with factory heads. Ive got a TFS street intake a mine and works great but since you already have lower I'd stay with it. Tony G. of HP Performance in Jax has a 86 twin turbo and has GT40 on it (runs low 10s and still has AC)

Put a Kenne Bell screw-charger on that GT40 lower intake. You'll be glad you did!

tmoss, I looked at those for a long time and is actually the reason I have a gt40 lower right now. I had planned on using that with a kenne bell blowzilla but then came across a low miles vortech kit for half the price. Can't beat the cost difference and I already purchased the Vortech so there's no going back now.

I like the Downs Box upper for the GT40 lower.

In that case, any GT40/Cobra/Explorer upper will work. Explorers can be had fairly cheap.

I have had the cobra the GT-40 and the explorer upper.

At the moment I am using a cobra upper intake with a ported GT-40 lower intake.

After trying all 3 I prefer the cobra upper intake. The GT-40 leaves no room for future porting and the explorer is cast very poorly.

The GT-40 ported lower with the stock heads and a blower should work well.

I tried a comp polymers box upper for about ten minutes it killed the torque big time but my engine is N/A.

My 97 Explorer intake is a very high quality casting. It's runner design is better than the 94-95 Cobra intakes also - the runners next to the throttle body runner are not "pinched" like the 94-95 Cobra uppers.

Well my explorer upper was a POS. I bought mine new and when I bolted it down the ear broke off cause the damn thing wasnt straight.

The cobra intake also looks much better IMO.

whatever you do, dont get a holley intake! rip off!

I think I'm going to try and find a nice cobra intake, I prefer their look as well. Still not sure what I'm going to need for fuel. What size injectors am I going to want to not be starving my car around 400hp and not too big that it'll still be very streetable.

I would go with 36# injectors with your set-up.

The only way you'll see 400hp with that setup is if you run a ton of boost, I'd say atleast 16psi, which in turn is not safe with the stock cast pistons in your 94's engine. You mentioned that you don't have the budget to upgrade the rest of the components as well, but one thing is for sure: when you add a power adder to ANY engine, you HAVE to budget for broken parts, because they will break.

Going fast isn't as easy as grabbing any old mustang magazing and ordering the parts that they say make amazing numbers.
You are going to need to address the rest of the driveline, with the stock tranny being the weak link, as well as addressing the fuel system to support this newfound power.

I'm not trying to lecture, but if it were me in the same situation with a limited budget, then there is no way I would put a blower on the car. I would take that supercharger money and build up the critical components of the car, and put together a nice running naturally aspirated combination first, and then the supercharger added later will be that much more rewarding.

Sorry if it seems like I'm lecturing, I'm just trying to give some sound advice.

-Drew

I dont know about that I have seen a bone stock stang with just exhaust put down very near 400 RWHP with a novi 1000 @ 8psi

387RWHP to be exact.

A local made 410RWHP with a Stock 95 GT with 15psi and the stock Cobra intake. He just put GT40 heads with ported exhaust ports on, got me to port the lower and he will be re-dyno testing this month.

Drew,

you bring up some good points and were right in the fact that I wasn't fully taking into consideration the need to replace broken parts. I'm not figuring that into the cost, but should that come up I will be able to afford the repairs, I just don't want to ;) And I know not to believe the advertising hype like "gain up to 30hp!" I'm attempting to put together a nice streetable supercharger combo that isn't too extreme, which is why I'm on the boards asking for advice on what I need. I have started address the fuel system needs but don't have all the information yet, I need to know what size injectors a blown car will need in the 300-400hp range(Dark_5.0 suggested 36#), I have a new 65 gph fuel pump on the way, and need to know if the FMU ratio is relative to the injector size or if a 12:1 FMU will work no matter what injector size I have.

I would highly suggest ditching the FMU all together. With just an aftermarket intake, 36lb injectors and no FMU should be fine with a blower.

Then if you step up in heads and cam, then depending on boost you can add 42's or 50's sometime later.

Just adding a blower and a cobra intake will give you a very nice streetable supercharger combo, with 8-9psi of boost, you should see somewhere around 350rwhp, which is no chump on the streets and in your car could be anywhere from mid 12's to high 11's at the track depending on how you drive it and traction.

What are you going to be using for tires? Any suspension mods yet?

No FMU would save me a little money, but do larger injectors affect idle/streetability at all?
Right now I have Sumitomo HTRZ II tires but the rear tires need to be replaced soon. Not sure if I should keep them or get something else, anything costs a bit with an 18" rim. I have a few minor suspension mods, polyurethane bushings and kenny brown super subs.

Well there is no 18" tire in the world that will hook up great, BUT bfgoodrich has started making their different style drag radial in an 18" version, so thats something you might want to check out in the future.

Thats a good start on suspension mods. Next thing you might want to look into is a good set of rear control arms. Under high load, the stock ones can flex and can cause all sorts of traction problems. Another thing to think about for the future.


About the FMU, you have a few options. You could either use 36's and no FMU, and although your idle and streetability won't be QUITE as smooth as stock, it won't be bad.
Or you could use 24's and an FMU, which I do not reccomend. I'd rather have the injectors working at a lower duty cycle, than be pushing them harder with the FMU.

fyi, 36's and an FMU would be overkill for your combo

hope this helps some,

-Drew

[QUOTE][i]Originally posted by fiveohpatrol

you should see somewhere around 350rwhp, which is no chump on the streets and in your car could be anywhere from mid 12's to high 11's at the track depending on how you drive it and traction.

If not little faster with 350rwhp.

Just thought of somethingelse, what are your suggestions for running colder spark plugs/which brands are best?

definately go cooler, we did on our blown app and it ran very well, we stuck with Autolites. I also think 36lbers will be an overkill.

With no FMU and his "goal" of 400RWHP 36# injectors would be perfect.

agreed
 

I agree...36lb. injectors sound right on the money. Definitely not over kill IMO.

right, 36's will be fine with NO FMU

36# injectors seems to be the consensus. But I'm still not sure about sparkplugs, is there any kind of standard for how much cooler I should go and if any brands work better for blown applications.

Care to elaborate?

I think the SysteMax II a great intake, just not the perfect intake for every application. It's too big for a 6000 rpm max, 306 cid, n/a engine. It works great on larger displacement engines w/ more rpm or an engine with a blower. One thing I didn't like was how it's runners didn't match up very well to my AFR 205 heads. But that's part of the game when you mix and match parts from different manufacturers.

like u stated one reason is the bad matchup with different combos. several of my friends also tried the systemax package and for that price they got ripped off power wise.

cobra intake
 

i have a cobra intake perfect for that car if your looking for one!

94snake, I'm still looking for an upper intake and am interested. Send out an email and let me know what you have.

cobra intake
 

i have a 5.0 cobra upper & lower intake if anyone is looking for one!! i recently just put an edelbrock on mine & im lookin to get rid of it cheep!!

Running a FMU would be OK, I would suggest a progressive one so that it is adjustable.


"I would highly suggest ditching the FMU all together. With just an aftermarket intake, 36lb injectors and no FMU should be fine with a blower." --- As long as it was tunned. If he would have a higher FP at idle, than the car will start to load up. That is what mine is doing now. I need to get it down to 34psi at ide and spike to 60 at WOT. Still working on this, I think my FPR is going south, or I am just dumb, and dont know what the hell I am doing
:rolleyes: :D

As far as intakes go, what ever you want, they are ALL better than stock.

cobra intake
 

Hey..... i have a cobra upper n lower intake off of my 94 snake if you are interested!!! im just trying to get rid of it...let me know if your interested!!!

Intake
 

I have a 94 cobra and i recently put an edelbrock intake on it. I have my old cobra upper n lower intake if ur interested? post back if you are!!!??

I ended up getting a downs box upper intake, only thing left to work with is the fuel system and maf, and then the throttle body. Just have to wait till it gets warm out and me and my buddy are going to do a rebuild and then put all the new toys on.