My 95 it has a 5.0 with mass air. My question is I have put gt40p(explorer 4 rib) heads on it since I had them off one of my mustangs. I have a edlebrock performer truck intake coming to put on it. I want to put a hotter cam in it possibly a e303 or I also have a factory explorer cam if that is better than the stock cam. Should I use the explorer cam or can I use a e303? Should I use bigger injectors? I also have a C&L mass air off my 95 GT callibrated to 24lb injectors could I use that on my 95 f150 if I need to bump up to bigger injectors and cam swap?

 

Great heads. There are better cams out there for your truck. stock 19lb injectors will be fine. But if you go with the 24s youll need the matched air meter.

 

I would not use eather cam. If I am not mastaken the exploder cam is a step down from your stock 5.0 cam[could be wrong, but heard that somewere] I would look to one of the low end, and midrange truck cams on the market. Something that will use the increased flow you have, but still give you some lowend to move the big heavy truck.

 

The Explorer cam and the truck cam are one and the same, otherwise known as the F4TE roller cam.
The E cam and the edelbrock truck intake are a complete mismatch, the intake targets low rpm power and the cam targets high rpm power.. don't go there. Get the Comp 35-510-8 or 35-308-8 instead.

 

Sweet! Thanks for the imformation on the cam choice. With the comp cams listed above would it be better if I bumped up the injectors? or will the 19lbs still be plenty of fuel?

 

I have the comp xe266hr12 in my 351w roller in my 68. The 35-308-8 I can use my stock injectors but the 35-518-8 I will eed to go to bigger 24lb injectors. What do all of you recomend for a mass air? Can I use the 24lb calibrated mass air off my mustang?

 

With a truck intake the 19lb ers will probably suffice. Best advice would be to get a wideband O2 sensor and watch the A/F ratio. If it runs lean at high rpm a bump in fuel pressure should cover it.. If not then step up the injector size and get a tuner.
I'm not a fan of the calibrated MAF meter trick, it's a half assed bandaid that sort-of works. At low rpms the fuel requirements for a modified motor are not that much different than a stock motor, but as rpms increase the differences widen. So the motor gets more fuel than it needs at everthing below WOT at 5000rpm, and the computer will attempt to compensate, but it can only correct so much so milage and perfermance will suffer at low rpms. What is really needed are injector/MAF transfer functions with a different slope, and the only way to do this is by editing with a tuner.

 

That is great imformation! What tunner would you recomend?

 

Choo, I have a set of ported and worked over GT40p heads I was going to put on my '89 notch. I just sold it. So now I might put them on my '96. What headers are you using on your truck with the 'p' heads?

 

I have a set of headman headers for a 95-96 5.0. The plug boots are close to the tubes but work so I recomend using spark plug boot covers like the ones from jba or taylor.

 

I concur. Alphabet cams and full size pickups are not a match made in heaven.

If the 35-510-8 requires 24#'ers and above, the 35-308-8 will provide significant gains over the weeny f4te cam, or the e303. And, from experience, the 19#'ers work just fine with that cam.

The stock truck MAF unit is good to well over 300rwhp. Stick with the stock hardware. Adjust via fpr pressure if lean conditions develop.

With my well ported E7's (which flow better than gt40p's out of the box), 35-308-8 cam, ported lower intake, upper plenum matched to BBK twin 61mm throttle body, and long tube headers, and the aid of a Innovate Wideband o2 sensor... I see a smidgen of a lean condition (14.45:1 @ 5,000 rpm) above 4,700 rpms on the stock MAF ecu tune. The stock tune keeps me right at 13.2:1 throughout the power band. With that data, I decided the added 3lb's of pressure from the adjustable FPR I installed was not worth it, and left the truck at stock fuel pressure on the stock tune. (The truck shifts at 4,900 at WOT) I've since put 25,000 miles on this setup with no signs of detonation or lean conditions from the plugs.


The stock tune will be just fine to compensate for those mods.... Unless you plan to step up to some nasty AFR heads and a high flow TFS or Eddy Performer EFI intake, don't mess with the tuning.

Sorry for the long reply.... but I hope this clears up the capabilities of the stock truck ECU with MAF.

Mike

 

damn I wanted to run an e303 cam in my 96 302. Hmm...