SN95 Is F Cam To Much

[Noobz347]

The stock cam is going to run and feel a lot better than that F-cam without supporting mods.

When it's all said and done, it would be cheaper to buy a cam to match your stuff than buying stuff to match the cam.

Will it work? Yep... You'll stomp on the gas, there will be a brief period of dark smoke from the exhaust, the car will momentarily squat like it's about to enter into warp speed, then....

You'll get passed on the shoulder by someone who thought you'd be out of the way by the time he got there.

Wear a cape.

 

[mikestang63]

people dont understand the stock cam is great for low end torque. I would get an N41 cam for that setup.

 

[jrichker]

What year is the car?
Does it have a Mass Air Computer in it? All Mustangs after 1988 had mass Air computer in them along with a MAF.


Speed Density uses Manifold vacuum (MAP), Throttle position (TPS) and RPM, & Air Temperature (ACT) to guess how much air the engine is pulling in. Then it uses all of them plus the O2 and ECT sensors to calculate the air/fuel mixture. It is dependent on steady manifold vacuum and minimal changes in airflow from the stock engine configuration to maintain the proper air/fuel ratio. Change the airflow or vacuum too much and the computer can't compensate for the changes, and does not run well. Forget about putting a wild cam, supercharger, turbocharger or monster stroker crank in a Speed Density engine, because the stock computer tune won’t handle it. Every time you seriously change the airflow through the engine, you need a new custom burned chip to make the engine run at peak performance.

Mass Air uses a Mass Air Flow meter (MAF) to actually measure how much air is being pulled into the engine. The computer uses this information and inputs from the O2, TPS, ACT, ECT, RPM and Barometric Pressure (Baro) sensors to calculate the proper air/fuel ratio. It is very tolerant of changes in airflow and vacuum and tolerates wild cams, high flowing heads, and changes in displacement with minimal difficulties. Larger injectors can be used with an aftermarket calibrated MAF or a custom dyno tune. This makes it possible to use the stock computer with engine displacements from 302-408 cu in, and make many modifications without a custom dyno tune chip. Put a new intake manifold on your 331 stroker and the computer figures out how much more fuel to deliver without having to have a new chip burned to accommodate the extra airflow.

 

[a91what]

A filter on the map signal (vacuum line to the map from the intake) works wonders on smoothing that out. I use a fuel filter for a carburetor, you would need fittings for the vacuum line or reducers to make this work. The results will surprise you.

 

[Meanstang73]

Yeah, you're probably going to have an issue,unfortunately. Is that a stock torque converter/trans? What rear gear do you have? If these are all stock...going to have some more issues. Car isn't going to run very good at all.

yea going to install 373 gear and tranny is stock. yea think I should have put more thought in it. only reason I was doing the mods was cause its got a blown head gasket, I'm wanting to get a lil summer driving out of it. this winter I was going to do a swap.

 

[stykthyn]

I would leave out the f can and stick with the stock unit unless you plan on adding a high stall converter.

 

[Redfire Fox]

I would leave out the f can and stick with the stock unit unless you plan on adding a high stall converter.

^^This^^
F303 cam with a C4 transmission/3000 stall converter here. Runs great and pulls hard when on the highway.

 

[Meanstang73]

The stock cam is going to run and feel a lot better than that F-cam without supporting mods.

When it's all said and done, it would be cheaper to buy a cam to match your stuff than buying stuff to match the cam.

Will it work? Yep... You'll stomp on the gas, there will be a brief period of dark smoke from the exhaust, the car will momentarily squat like it's about to enter into warp speed, then....

You'll get passed on the shoulder by someone who thought you'd be out of the way by the time he got there.

Wear a cape.

so if I run the heads gt40p and intake gt40p as well. and leave the stock cam for now will the computer be ok. I'm doing a complete tear down in the winter. only reason Im tearing down now is because a blown head gasket or intake water in the oil.. I just want it up and going for the summer. 331 or 351 in the winter as well as it goes in the paint booth in November.. thanks for the input everyone

 

[Meanstang73]

also 1.6 rockers and not sure on the tb yet going to get one this week.

 

[A5literMan]

Just throw the stock cam in while installing the 40 heads. You won't throw any codes,the car will drive like stock,etc. I also recommend not buying a TB or anything else until you know exactly what you're going to be doing this fall. The 40 heads are to small for a built motor going forward anyway....so would any other bolt ons designed for a 302. Just trying to save you some money and disappointment later on. Unless the 331/351 are more likely "day dreams"-no disrespect meant-all of these things will slightly improve power/performance.

 

[Meanstang73]

I didn't take it bad brother, any help is good help in my eye. the 351 or stroke will happen, I just had a blown head Gasket that's the way I bought the car I had to tear it down to fix it so I thought heck let's have a lil fun with it..lol.. the GT40p and the cam is fairly inexpensive so I bought it. it's my fault for not doing my homework..lol. and I greatly appreciate the info. I'm going to leave the stock cam bolt down the heads and 1.6 rockers and the headers, I'll leave the stock upper and lower and tb for now. I'm going to get to reading and work out a plan of action..

 

[TOOLOW91]

I didn't take it bad brother, any help is good help in my eye. the 351 or stroke will happen, I just had a blown head Gasket that's the way I bought the car I had to tear it down to fix it so I thought heck let's have a lil fun with it..lol.. the GT40p and the cam is fairly inexpensive so I bought it. it's my fault for not doing my homework..lol. and I greatly appreciate the info. I'm going to leave the stock cam bolt down the heads and 1.6 rockers and the headers, I'll leave the stock upper and lower and tb for now. I'm going to get to reading and work out a plan of action..

If you can find a junk yard explorer upper and lower (gt40) while your at it go for it . The stock intake is a huge bottle neck .


Sent from my iPhone using my fingers while my auto correct makes me seem illiterate

 

[Meanstang73]

I ran across a
MUSTANG AFM SERIES 4 PMS TUNER (PROGRAMMABLE ENGINE MANAGEMENT SYSTEM) (94-95) 5.0L/5.8L.. good idea to buy or no?

 

[Black1987]

I ran across a
MUSTANG AFM SERIES 4 PMS TUNER (PROGRAMMABLE ENGINE MANAGEMENT SYSTEM) (94-95) 5.0L/5.8L.. good idea to buy or no?

Its a good piggy back unit and can be used with success. The learning curve isn't too steep, but most people are left desiring more control like a megasquirt, FAST, or Holley units. Depending on your goals...with you current combination its overkill.

However, if you plan on a boosted application, a radical cam, or just wanting to control and tune your engine, then I recommend to pass and look into the other three units I mentioned.

 

[Meanstang73]

ok. just ran across one local for 400. for the money thought it would b the right move.

 

[Black1987]

ok. just ran across one local for 400. for the money thought it would b the right move.

400 bucks I'll buy, try it, and if don't like it flip it.

 

[Meanstang73]

I see they sell for like 1200... so I thought the same resale if it don't work out. idk tho.. I'll find out Tuesday when the guy gets bak from the beach.