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why does everyone want less preload. the lifter has as much as 200 thousand travel. the factory preload was over 100 thousand. you end up with noisy lifters for one of the problems.

what is your preload ?

what is your set up on this car ?

engine masters had the heads flowing just about the same iron vs alum but did I miss where they said both heads had the same cc chambers.

that is what i call a race car driven on the street. lol

Big Joe 2 times engine masters winner on speed talk forums.

you better not Joe Friday and Bill Gannon will be knocking on your door. lol

my definition is making a factory car run faster without any negative side effects and keeping the bottom end torque. not running a long duration cam, no single plane intake, too much compression too much gear, too much stall converter and a loud droning exhaust but still gets 16-17 mpg on the...

for me in a street car I will stick with iron heads.

so 15-20 HP there plus if changing to alum heads and adding another 3/4 point of compression you could add even more hp plus more compression will help bottom end torque

no need to be a jerk about it. I didn't spread anything except which has been said and printed hundreds of times. it was a fact he said he went slower after the alum heads. if he went from 79 cc iron heads to 88 cc alum heads he most likely went slower. alum heads were out years before engine...

not sure what cc heads they were running plus they say if you have 9.5 compression with iron heads then with alum heads you need 3/4 to a full point more static compression so 10.25-10.5 to equal 9.5.

guys went to high flow aluminum heads from stock and lost power most likely from a loss of compression but who knows what else caused the loss of power.

what variables are there ?

so 200 cfm can support 400 HP. if the engine is making 375 HP now so there is no gain going to 250 cfm.

if you have a cylinder head that flows say 200 cfm at 500 lift and another head that flows 250 cfm at 500 lift how much would you gain in HP and TQ. not changing anything else, same Carb, intake, exhaust manifolds and same 500 lift cam say with 224-224 duration @.050. and keeping the rpms at max...

the bad 60 ft time was because the car went sideways and wasn't expecting that. so when I hook it should be at 1.90-1.95 60 ft should give me about 13.30-13.40 and 101 mph. not going to be racing anyways just want it to run good.

thought i was going crazy made 3 runs all low 14's felt like no power 2 second 60 ft times. going to call it quits but felt like more power on the way back. did one last run the power started coming back. I think because the oil had to warm up well and the intake had to get heat soaked. 15-40...

l bought the heads 10 years ago never really looked them over. I know they have the 1.74 valve and 924 valve springs which I like the 911 spring a lot better. he said the heads were ported but not sure how much. when the intake was off I saw the intake runners they were just machined a little...

rpm performer, avs2 800 carb, light weight pistons. ESTA