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  1. Cylinder 6 Misfire, is this explanation plausible?

    2005-2010 Mustang GT Tech
    Hey guys, today I went to go start my car and noticed the CEL was on. First time I've had the light so my heart sunk. My car is dyno tuned so I don't have a tuner or scanner, so I headed towards advance. I kept hoping it was just an o2 sensor. I got to the shop and they scanned the codes, they...
  2. Need voltage output from 02 sensors.

    5.0L Tech
    Wideband O2 to AFR controller to ECU Hey guys. I installed my MXT-L AFR controller along with a bosch style wide band in my driver side bank. I need to know the voltage output from my o2 sensor that my ECU needs to read lamda (or shall I say lean/rich) as I can define this in my controller...
  3. Trying to make a nice combo for my 302

    5.0L Tech
    Okay...havent signed on this site in a few years dont know if i am in the right thread but im looking to go with AFR 165 pedestal mount heads, with a Anderson N21 cam which is the same as the n41 but uses 1.7 rockers which i have already..and i also converted to is too slow for...
  4. AFR 165 vs twisted wedge

    5.0L Tech
    Which do you guys think are the better all round heads? I know with the afr's it mentions you need hardened pushrods, anything else? The engine itself is stock. Any PtV clearance issues? Would a MAF upgrade be mandatory? Mines an 88 (non cali). The same qu's for the twisted wedge heads...
  5. AFR 20:1 @ WOT, why so lean?

    2011 - 2014 V6 Mustang Tech
    Guys I need your help. Recently I noticed that at WOT air-fuel ratio shows me 20:1, but at idle it holds between 14.0-14.6, at 2k-4k somewhere between 12.9-13.6. But when I push the pedal down to the floor I see 20 and even when I release pedal it hold 2-3 seconds and drops down to the normal...
  6. AFR 165 HP gains?

    5.0L Talk
    I'm looking to buy some new heads for my car and think I've settled on Afr 165s. I'm just wondering what to expect in horsepower gains? I would like to be close to 400hp. I have an Edlebrock performer intake, 600cfm carb, Bbk Longtube headers, no cats, and a small cam slightly bigger than stock...
  7. Need help choosing heads for a 302 with future plans of a 347 in mind!

    5.0L Tech
    I would like some help choosing heads for a stock bottom end 302. I'm ready to purchase a set of heads that will work on a future 347 build. I was looking at afr 185s but don't want to deal with ptv clearance issues. I have been told by a rep at trick flow that their 190cc trick flow twisted...
  8. build a 350rwhp 302 for the street possible

    5.0L Tech
    ok ready to ditch my gt40 set up ,even tho its done well for me so is it possible to make a 350rwhp on a stock 302 short-block naturally-aspired fuel injected what h/c/i would do it for me and yes i already have the little stuff (full exhaust,75mm throttle body,shorty headers,eletric fan,1.6...
  9. power estimate please (trickflow h/c/i)

    5.0L Tech
    *170cc trick flow twisted wedge heads with upgraded valve springs *trick flow track heat intake *custom cam or comp cam,maby keep the tfs1 i already have? *1.6 roller rockers *and all the little stuff like 75mm throttle body, mass air meter and fuel injectors, under drive pullies, ceramic...
  10. trading up from gt40 to trickflow heads

    5.0L Tech
    ok heres what i got now gt40p heads/cobra intake/tfs1 cam/65mm throttle body/and stock 1.6 rocker arms, and im wanting to trade up to trickflow heads like Trick Flow Specialties TFS-51400002 - Trick Flow® Twisted Wedge® 170 Cylinder Heads for Small Block Ford - Overview - or...
  11. are procomp heads any good?

    5.0L Talk
    hey im michael and im building a 302 to put in my 93 lx, i am looking for the least expensive way to get a set of ok aluminum heads, i found a set on ebay 190cc with 60cc combustion chambers completely assembaled for a lil over 550. i know they arent near as good as afr i mean the price says...
  12. JBA Shorties, and AFR guage first impressions

    4.6L Talk
    About a week ago, I started the install on JBA shorty headers and an Autometer wide-band AFR guage. Finally finished it up tonight, and went for a test ride... JBA Headers: Pain in the ass install. Refer to my previous thread, "Harder Install: Headers or Gears" to read about the headaches the...
  13. should i upgrade valve springs?

    5.0L Tech
    whats up guys, i just bought some afr heads and im putting them on my engine that has the trickflow stage 2 cam. afr says the springs are good up to .500 lift and the exhaust lift on my cam is at around .560 a machinist told me i dont really need to upgrade springs but i will get some valve...
  14. 331 BLOCK AFR Heads with valve train noise

    5.0L Tech
    tappet type noise upper end seems like lack of oil to top end valve train noise oil press seems ok no guage yett was told its normal im sure its all roller hydro lifters just got the car not long ago im not redy to tear it down yett was told 15k on engine
  15. Horsepower Guesstimate?

    5.0L Tech
    Hey i was just wondering what kind of rwhp to expect from my build, its a 347 stroker, afr heads, comp cam, 30lb injectors 75mm TB, please let me know?