New M90 owner.

[rallystang]

Not technically a new 'SC Owner' but I now own your 'SC Setup' on my Mustang. I have a few questions, I've read a lot on here but appoligize in advanced for asking questions that are likely answered elsewhere.

I'm already looking for more power... I have good headers/exhaust/chip/intercooler fan. I wish to keep my stock gears. I am looking for cheap mods like a blower OD Pulley, Raised Top etc. If you could post the cost of the mod, and power gained I'd appreciate it.

The raised top seems to be a really common mod but I have a few questions. I have seen some tops that look like the guys just make an aluminum spacer to raise the top, how much power does this add? How do you make your Stock IC Piping still line up? Could reasonable power be made by just porting the top without making a spacer?

What other simple mods am I overlooking?

I also have a fenderwell CAI, stock 70MM Maf, and stock 1990 SC TB.

Thanks!

[xThunderbirdSCx]

Not technically a new 'SC Owner' but I now own your 'SC Setup' on my Mustang. I have a few questions, I've read a lot on here but appoligize in advanced for asking questions that are likely answered elsewhere.

I'm already looking for more power... I have good headers/exhaust/chip/intercooler fan. I wish to keep my stock gears. I am looking for cheap mods like a blower OD Pulley, Raised Top etc. If you could post the cost of the mod, and power gained I'd appreciate it.

The raised top seems to be a really common mod but I have a few questions. I have seen some tops that look like the guys just make an aluminum spacer to raise the top, how much power does this add? How do you make your Stock IC Piping still line up? Could reasonable power be made by just porting the top without making a spacer?

What other simple mods am I overlooking?

I also have a fenderwell CAI, stock 70MM Maf, and stock 1990 SC TB.

Blower pulley: Im not sure about your engine, but on ours a typical gain from a 5% Overdriven pulley, one can expext 2-2.5 more psi or roughly 15-20 HP
I run a 10% OD and i estimated around a 20-25 HP gain. This is an important mod, but make sure when you add more boost, you have to add rigidity and durability to engine components (ie Head Gaskets, and forged internals down the road.) Our SC engines were already designed for this boost, not sure about the mustangs.

The next easy mod on your list should be a CAI (Cold Air Intake) and a much larger MAF (73-80 mm). This will berid of the huge air restriction on the intake portion. Power Gained could be somewhere from 3-10 HP depending.

After that, dump that stupid stock Throttle Body and up to a larger one instead. Im still not sure about boring out the stocker to larger specs, someone still has to answer me on that. Again, possibly 3-10 more HP.

Upgrade the intercooler. You can get expensive and go the Magnum Powers Front Mount INtercooler, or go cheaper, like a double IC and fan. Typical gains: 15-25 HP from a double, 25-30 from a FMIC


Next step would have to be the fuel system. A 255 lph Forced Induction fuel pump is nice, and wont need replaced for larger HP applications down the road. To go along with that, some 42 lb injectors would suffice. Not sure about the gains, but they are practically necessary when you go to the next step below.

That would take care of the intake, and it seems you also have a pretty good exhaust also. Another mod would be to purchase a new supercharger (i dont know if youre running the 89-93 version (if so upgrade) or the 94/95 (port it)) Either way, that will be your biggest hinderance on your HP gains. I recently bought an S-port for my applications and ive heard nothing but good things about it. You should pick it up for around 500.

Along with the supercharger, a raised top would be nice, so as the flow would be opened up. Gains are not going to be huge with just a raised top alone, but it will allow a more advanced SC (ie S Port, MP 1,2,or 3 or and AR) to flow better. Gains mabye 2-3 HP alone.

Also, get a new plenum (Magnum Powers) to go with it. Typical Gains from a ported supercharger and plenum can range from 50-100 HP depending on your applications (correct me if im wrong guys).

Then you would have to work your way into the engine with things like roller rockers and a new cam. I dont know anything about these gains, im researching currently. All i know is anyone in the low 13s/12s have a new cam.

The manifolds and cylinder heads definately will need porting when youre in there. Look around for someone who can do it cheap. XR7 Dave did mine, and the gains were great compared to previous air flow. He unshrouded the valves, port matched the intake, and ported some other things. Again look around. Remember, this causes better airflow, and the more airflow you have, the more boost you can run which means more HP.

There are some other things you can do that are fairly simple but i cant come to think of them right now.

Good luck, and i hope this helped!

[xThunderbirdSCx]

The raised top seems to be a really common mod but I have a few questions. I have seen some tops that look like the guys just make an aluminum spacer to raise the top, how much power does this add? How do you make your Stock IC Piping still line up? Could reasonable power be made by just porting the top without making a spacer?

1- Not much power unless combined with a better blower and other mods. Alone, it's pretty much worthless. It is helpful when running higher boost applications.

2- Super Coupe Performance's Magnum Powers, and Texas Thunderbirds(both highly resputed craftsmen in their trades) both make SC raised tops that are made to bolt right onto the tubing, so no worries there. They are both around 250-350 shipped.

3-The home made looking ones (without the 3.8 on top) are for custom piping applications usually, and wont line up. Stick with SCP and Texas Thunderbirds, unless the custom ones were made to line up to stock locations.

[rallystang]

Thanks for the info!

The mustang internals are not forged and run a fairly high compression. However some people have managed 11's without upgrading internals. I should be safe around 12psi... and up to 300 or so HP. The head gasket is my biggest worry... In 96 Mustangs got an upgrade but the MLS ones would be a great insurance.

I have a CAI but a 70mm MAF and 60?mm Stock TB. These will probably be my next upgrades but I am cheap so I would be looking for used parts, do you know what may bolt on like the Lightning MAF... I've heard the 5.0 TB's are a good upgrade.

A double IC definately interests me... Although I am using my Mustang Radiator which barely allows the IC any room. I managed to use an IC with the brass end tanks so that I could weld another to it down the road... But will have to change radiators(no biggie... Probably better airflow) I also have a Fan on my IC. How hard is it to double up the IC's? Just weld em together?

I have a 255 lph Fuel Pump installed now, along with the factory 30LB injectors I was told would take me to 300 HP.

I am running the early version SC, I wanted to keep the boost down so I didn't try to find the later model. I am not looking to run much more boost, so I thought a 10% OD pulley would set me straight in the Supercharger Department:). I would not pay 500 for one though... I'd wait until a local junkyard gets one in.

I will get my heads ported when my head gasket goes. While I'm in there I will definately be thinking about a cam.

It sounds like the raised top is a waist of money for 2-3 HP.

[xThunderbirdSCx]

i would say use a 73mm MAF and 70mm TB.

You need to tig weld the intercoolers together. It is a tough job to do considering there cant be any leaks whatsoever. I would find someone selling one, or someone who fabs them on these forums.

The $500 supercharger i was talking about was the special model S Port, and magnum powers 1, 2, and 3, and the Autorotor superchargers, all of which are high end, much better versions than the stock ones.

Dont wait until the headgasket blows to change it. It runs the risk of getting coolant in the oil, thus causing even bigger problems. Change them ASAP, youre better off as a safety precaution.

A raised top is MUCH MUCH more effective at producing HP with one of the aforementioned superchargers. Not so much the stock ones.

[rallystang]

Would a 3MM difference in the MAF really help... Seems like a 4% increase is a little low? Is a 70MM TB a Mustang GT Takeoff? What years?

I see a ton of intercoolers for sale on ebay... 31X9X2.75 for 150 bucks new/shipped... Then 120 for IC Piping... $270 FMIC...

[DamonSlowpokeBaumann]

If you ask me..

Aluminum underdrive pulleyes. Are you using SC jackshaft setup???

Performance industries makes a 75mm TB for 130 or so satin finished for SC. Unsure if you can port stock inlet to support that however. Can be found on EBay. I'd go 76mm C&L MAF and would consider upgrading the injectors whiel I was at it. 42's willast you for awhile and will still work well with a slightly modded setup such as yours. I wouldnt raise the boost with the stock motor however you should get a few more lbs with the bigger TB MAF and cold air intake. Intake should be a 3 inch one.

After all this if you still arnty happy raise the boost and pray!

[DamonSlowpokeBaumann]

The mustang TB is no larger then the SC one so dont bother. Even them youd need to modify the linkage.

[Roadhawg]

I have a SC powered Mustang.......
I used an aftermarket 70mm TB for a 95GT and linkage from a 95GT.
I port matched the plenum to match the 70mm TB. I used a 80mm Maf from a Lightning. I also put a 10% OD pulley. My next Mods will be a raised top, double IC and a heat exxtractor hood.