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compression

  1. SVT Cobra Tech
    Hi, SVT lovers! Just joined and I'm thinking that I'm following all the Forum rules, so I'm posting this issue that I have and hoping that I can get your valuable opinions... I got a 2003 Cobra that I bought in 2004 with only 5000 miles on it. The car has been running fine and it now has 67k...
  2. V6 Tech
    OK... ive been all over the internet looking for advice but i cant find any. I have a set of heads for my 3.8l already ported and polished. Does anyone have any idea about how far i need to shave the mating surface of the heads to reach 10:1 compression... i know that the 3.8l has about a 9.3:1...
  3. Classic Tech
    So I bought a 306(302 bored .030 over) from a friend of a friend. Bad idea. Along with problems with valve seating which I have had professionally fixed the pistons are sticking .007 above the deck surface at top dead centre. It has 1.94 int. and 1.6 exh. Valves also. They are flat top pistons...
  4. V6 Tech
    ok... im sure this has been asked over and over.. but i can not find any examples or advice ANYWHERE. anyhow, im looking to mill a set of heads i have off of a 2004 v6.. they are going on my 2001 v6... i want to be able to run pump gas and i am wondering if anyone has any suggestions on how many...
  5. 2005-2010 Mustang GT Tech
    I've been studying the dark art of cam design and found some information & calculators. These only raised more questions. So I decided to start a thread (the search didn't find a previous thread) dealing with DCR and cam timing events so inquisitive people like me might have our questions...
  6. 2.3L Tech
    i have a 1989 mustang lx 2.3 auto. has a dead engine miss at idle until around 2500 rpm. number 2 is dead (removed plug wire and had not change). i have installed # 2 injector, plugs, wires, cap, rotor. i have good spark at the plug, has power at the injector and a pulsating ground signal...
  7. Classic Tech
    Hi, My Name is Spencer. I have a 1968 Mustang Convertable with a 302 in it, manual transmission. It starts right up when it is cold and runs nicely, but when I turn it off I can't get it to start back up. It acts like the battery is run down, but when I pulled the batery cables off and checked...
  8. 5.0L Tech
    Hey guys I'm in process of building a EFI 331 Stroker. Trick Flow Heads with an X303 cam. I am afraid that my compression ratio is way too high. Is this ok for a street motor or can i do something like retard the ignition or cam timing. I'd rather not have to replace my heads or anything...
  9. Classic Talk
    Alright guys i want to make myself 100% clear on this before i start buying stuff i cant use and this site hasnt let me down yet I have a 65 289 block and bottom end, with hyper. flat top speed pro pistons with 4 valve reliefs (+8cc). i have ported 302 D0OE heads with 2.02 and 1.6 valves (i...
  10. 2.3L Tech
    yeah, i'm pretty sure i killed it good. how bad did i hurt it is the question :shiny:. fyi because i almost forgot, my engine's a 1991 2.3 ford ranger. (when it was working right it pulled like a banshee!) for like the last 2 weeks i been running my stang hard and fast (making up for lost...
  11. 2005-2010 Mustang GT Tech
    Ok, let me first state that I know very little about the actual functional specifications of the internals of an engine. Though I am trying to learn, it is pretty much a foreign language to me (computer tech/network engineer). What I am trying to understand, is engine compression, but not a...
  12. 5.0L Tech
    Freshly bored out 306 block with a Ford Racing F cam, a Ford Racing double timing chain, TRW pistons, stock E7 heads bored out, comp cams double coil springs, comp cams magnum 1.6 rockers, manley valves, isky retainers, and chrome Ford Racing 3 inch tall valve covers. heads are set to be at...
  13. Classic Tech
    Hello there. I just did a an engine compression test on all 8 cylinders a little bit ago and 7 out of 8 cylinders were in the range of 137 to 142 PSI with the exception of cylinder 2 which checked out at 116 PSI. There are a lot of miles on the engine. I'd say almost 100 thousand. It was rebuilt...
  14. 5.0L Tech
    I currently have a 94 gt with the P1SC Prochrager with only other mods being bbk shorty headers, full exhuast with the cats removed. I currently am running the 3.55" pulley making 11 pounds of boost. We are tearing the motor down in about a week. I purchased the Trick Flow 360HP top end kit...
  15. V6 Tech
    k so my 2000 v6 has the stock 3.4 stroke. just to clear things up is the stroke the length of the connecting rod or is it the width of the crank from the connecting rod when the combustion cycle goes thru its power stage at 90 degrees? idk which ever one all i know is the stroke plays a big...
  16. Classic Tech
    i have a tread about what octane i should use but heres a kicker the whole engine is a stock 1980 block with 1966 289 heads will the compression affect the internals of the engine like the rods crank bearings or pistons heres a list of exact whats in the 302 Stock cam Stock flat toped pistons...
  17. Classic Tech
    i am sure i set my 302 to either 10.5:1 or 11:1 what octane should i use can i get by with 93 from a pump or do i have to add lead? i did some research and saw that i should be useing 104 octane but i have no idea what they mean with all this RON and PON stuff can anyone tell me if i should go...
  18. Classic Tech
    Is 10:1 compresion on a 1968 ford 302 good or should i try to go higher. i belive i now need to use 93 gas so i dont cause knocking would getting it to 11:1 Give it more power or will i hit a point where i will lose power due to not enough opening in the valves. Thanks Tom
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