brendenwilk

ok guys first off im a newb so be easy on me. but i heard that if you pull the piston on and turn the piston 180 degrees it actually raises your stroke. i dont know how much or anything. then if you shave the head .020 then use the stock head gasket it raises your compression to 10:1 is all this true or is the guy blowing smoke up my a$$

AdderMk2

false information

turning the piston around in the bore does NOTHING for the stroke. Infact, if it DID increase the stroke, it would either drmatically decrease your compression ratio, OR slap the piston face into the head

who ever told you that should be smacked in the face with a baby tuna fish!

brendenwilk

ok thanks for the help. im running an 85 gt 5 speed. but i have an 89 block in it now. but its still carbrated. im looking to get some more power out of it with out paying an arm leg and left nut just to get it faster. any help would be good

AdderMk2

gt-40P heads, and a new cam with a good intake would be a cheap place to start

brendenwilk

where can i find the gt-40p heads?

AdderMk2

junkyard, ebay, craigslist

they are found on 97.5-2001 explorer 5.0's

nitrous_bob

the part about decking the heads will raise compression though

i like '93 cobra heads better than p heads. they are real gt 40's , just iron instead of aluminum and when you find them similar in price

p heads need specific headers, and have smaller valves

brendenwilk

Ok I found a 98 explorer in my local junk yard and it has a 5.0 in ot how do I know if they are gt-40p heads

AdderMk2

they are P's

96-97.5 had the regular 40's, and they have 3 bars cast into the end of them... the P's have 4 bars cast into them