I recently purchased a procharger for my 97 f-150 4.6 automatic, currently i am running stock compression of 8.5:1 I was wondering if i could safley bump the boost to 12 PSI and run a 30+ # injectors and get it dynotuned, would this be safe and reliable i need the horsepower!!! Also any one know of a good way to get rid of the engine cut out at 95? I am running 37" tires with 4.88 and i am hurting top end whatcha ya all think
thanks in advance
Dan

 

HI!... Just so you know, the stock compression ratio on both the 4.6/5.4 in N/A trim are 9.0:1, not 8.5:1. The LIGHTNING's SC'ed 5.4 has a compression ratio of 8.4:1.

 

A lot of people are running 12lbs with the ATI safely. You will probably max out the MAF so you will need to upgrade to the 90mm MAF and use 42lb injectors instead of the 30lb. I have not gone this rout yet because of potential driveablility issues with the 90mm MAF.

The only way to cange the 95mph speed limiter is with a chip or reflashing the EEC.

With just a tune you may be happy with the performance increase instead of going with the fuel upgrades. Mike Dunn offers a low restriction air intake for the ATI setup that will give you about 2 more lbs of boost. He also supplies everything that you need for the 12lb upgrade except for the tune.

Nice pic, nice truck.

 

Anybody know where to buy the Pro-M 90mm MAF (I can't seem to find that exact spec, even at Pro-Flow!) AND the Bosch 255 lph pump?

Thanks!

 

Check with Mike Dunn at www.madenterprise.com