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gt40p

  1. 1986 mustang 5.0 need new computer and mass air sensor

    5.0L Tech
    hello, i have a 1986 mustang 5.0 5 speed, its a 347 stroker with gt40p heads, holley systemax intake, a radical cam, roller rockers and more. It has the wrong computer and no mass air sensor and im looking for the right ones to get. i was told to get an origional computer and send it in to get...
  2. Blue smoke after hard acceleration

    5.0L Tech
    Hey everyone my gt40p setup is smokin awesome, to be quite honest ive pulled away on a 03 Mach1, 2 new 5.0 stangs, 383 stroker camaro, and a lot of other stuff. My car is amazing with what i have done to it. 306 stock forged pistons stock cam, ported gt40p with 1.9 rev intake and 1.54 rev...
  3. 1987 Mustang Motor questions

    5.0L Tech
    Hello everybody! I have an 87' foxbody that has more cosmetic and paint work into it so far then performance so now that she looks good time to make her go faster. But to my questions.... I have a 72' 302 .36 over block fresh out of the machine shop. It was magnfluxed, hottanked, decked, bored...
  4. 1984 mustang gt40p heads. What cam, roller rockers do I need?

    5.0L Tech
    I have a 1984 5.0 with a 89 5.0 302 carb'd. I have a set of gt40p heads I am going to put on. I want to put a cam in and change to roller rockers. Any suggestions on what type of cam/rocker/spring combo will work well with a carb'd motor? Will my performer intake manifold bolt right up with the...
  5. What now????????

    5.0L Tech
    ugh, so i got a quote for porting my gt40p's and it came out to $550.... so what now? sell them and get aluminum? what should i get? or just put the gt40p's on and strap a blower on it? haha i just need some options like good cheap aluminum heads and how much i could get for my heads anything helps
  6. engine build ideas?

    5.0L Tech
    ive had an engine out of an explorer for over a year and finally got motivated to do a build. i got the block freshened up and the heads too. they are the gt40p heads and i was thinking about a port job and bigger cam. any recommendations and numbers you've seen? i was planning on the port, cam...
  7. Black Max Manley Valves???

    5.0L Tech
    whats the differance between the stainless steel manley valves and the black max manley valves?? these would be placed in home ported gt40p heads. the guy said he only has black max manley valves left and they are more expensive but will give me them at price of the stainless ones. He said there...
  8. Question for TMOSS or GT40p Guru's

    5.0L Tech
    Anyways Tom if you get this soon enough i want to ask you a few questions regarding my gt40p heads that i've got. First allow me to tell you my plan, Daily Street Driven Fox Mustang, Stock Cam, Explorer intake and now the heads. I want to know what i need to get to complete these heads. I want...
  9. intro to AFM, my 95 mustang GT 5.0

    5.0L Tech
    my name is chris im 19 i drive a 95 mustang gt with the 5.0, it has flowmasters, cold air intake, gt-40 heads, and smog delete. in the near future i plan to put roller rockers, cam (maybe), upper/lower intake, throttle and other simple bolt ons. also, quick question about the gt-40s, i know...
  10. another gt40p thread!!!

    5.0L Tech
    Alright so im finally getting to the motor work on my 86lx. the thing is the motor is older than the car. not sure on casting numbers but i do knows its a pedestal mount hydraulic flat tappet motor. So im ready to pick up some gt40p heads with new 1.90/1.60 valves and 5 angles port job for $300...
  11. 1993 Mustang LX with 5.0 conversion, Car dies at idle

    5.0L Tech
    Hey wats goin on guys need some serious help here.....I have a 93 lx (orig. 4cyl) with a 306, gt40p's, explorer intake, 24 pound injectors, cam, adj press. reg., 65 mm bbk tb, and long tubes. It's a 5 spd car....let's start from the beginning. Clutch went out a few months back and installed a...
  12. What to do with GT40ps?

    5.0L Tech
    I am about to get my hands on some GT40ps, one site said the need of new headers is a myth it will just be hard to replace 2 of the spark plugs. I was just wondering what I should do with them, should I just put them on or replace anything? Thoughts?
  13. new to site need help choosing heads

    5.0L Talk
    Im wondering if a set of gt-40p heads will be better than stock E7's:?: Also should i port the gt-40p heads:?:
  14. Best Intake For A 351W w/GT40p Heads

    5.0L Talk
    This isn't actually for a mustang, it's for a ski boat. I replaced the GT40 heads with GT40p's, also dropped a cam (small lift/495), roller lifters, rockers and flat top pistons in it. Heads have also been shaved 0.0020. I need advice from you 351W guru's on what intake will be best for...
  15. Pushrod Length

    5.0L Talk
    Hey guys, I am in the process of building a 306 engine for my mustang. I purchased the short block brand new on ebay with a one year warranty for $1,300, and it is supposed to make 440 hp. I have a trick flow tfs-51402000 cam with a duration of 283/291 and a lift of .499/.510. My question is...
  16. Trick Flow Twisted wedge heads

    5.0L Talk
    Hey guys, I have an oppurtunity to get a pair of trick flow twisted wedge heads. They are $300, and are said to be race ported. I was just curious if it is a good deal. Also, i was wondering if i could use the 1.6 alluminum rockers that are currently on my gt40p heads. I am going to include the...
  17. 4.6 cobra or explorer heads on my 289

    Classic Tech
    i have a chance to get ford explorer heads for my 289 for cheap. but i was wondering will 1996 4.6 cobra heads fit? are they gt40p? thanks for the help
  18. gt40p heads not really impressive

    5.0L Tech
    is there anyway to make my gt40p heads cobra intake 65mm tb and 73mm maf perform better it wasnt to impressed i did think it was worth the money ,but would like to no whats next for me
  19. do i need new valve springs

    5.0L Tech
    do i need new valve springs because i bought gt40p heads (off a explorer) and i want to use ford racing 1.7 roller rocker arms? in 3 months or so i want a tfs1 camshaft but i thought i would upgrade to Trick Flow Specialties TFS-2500100 - Trick Flow® Valve Spring Upgrade Kits - Overview -...
  20. Im Buying GT40 or gt40p Heads in California

    5.0L Talk
    (sorry if im not allowed to post this here) so i need to buy some gt40 or gt40 p heads They must have the smog pump holes on the back no broker bolts no cracks no rust and they dont need to have the rocker arms because im looking for 1.7 or 1.72 if they have those even better i live in...
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