Thread: Attention: Chris Hinson/Bully Flo!!

i literally can't even....

he must use the same machine shop that my uncle used for his road runner. all kinds off silliness with valve train geometry.

Originally Posted by Vet

lol there is a way better thread on this mess over at thechicagogarage.com in the 3800 section.

pucker up butter cup

I saw this coming from miles away while you defended this guy

you can PM me if you don't want to publicly announce that "I was right"

Someone I know has flow numbers for BullyFlo heads. And they weren't all that impressive. Something like 17cfm gain at .500 lift. Or something along those lines.

I have reopened this thread... BUT, I wanna keep all the posts ON TOPIC. NO senseless bashing. NO getting off topic. I wanna keep all this to FACTS and legit questions. This thread will be kept on a very short leash from this point on. I only reopened it because I felt there was a need to get answers to some of these questions AND to allow the newer members of the community to know what they COULD be getting into before they buy a set of BullyFlo heads.

stem heights look all ova the place. not to mention that head has quite a bit of core shift on the end. i know how hard it is to find good molds/cores so im curious if he just cleans up the casting defects and lets em ride?

does anyone ever do any cleanup of the casting oil drain path? lots of these bastards have nice sharp outside parting lines i always hit with a grinder along with the parting lines near the pushrods/outboard head stud pockets.

years ago im pretty sure i posted how to identify the core shift with visual inspection (pretty sure it was in my thread witht he sliced 2261/4781 castings.)
ive been crawling Jyards for years
simply it just involves looking at the ends of the head below the VC rail for machined surface down to the acc bolt holes (if core is shifted machine cutter no longer will surface the portion below the VC rail) and once both ends check out, you tear down the vc /rockers to inspect the stands/rocker thread centering. if that checks, remove intake/exhaust and feel the parting lines inside the ports. a valley is fine, a valley with excessive elevation on one side is questionable but dont discount it if the externals are good.

by now youve probably found only one head on the engine is a good core, this is normal, rarely have i found an engine with two good heads. yank it off and look at the chambers/carbon marks at the HG reliefs and how well positioned the end of the plug is in the chamber boss. a good indicator is how much of the port wall is machined from the seat/guide operations. this isnt nearly as important as the decks seem to be pretty consistent...im guessing the sand mold wasnt as susceptible to damage as the other sand core molds. they did tend to get deposits that leave negative area's near the plug/seats.
since one of the biggest improvements is unshrouding the valves the chamber is reworked. ive even gone as far as packing the piston/bore with grease and relieving the block at the "mickey mouse" ears.

you will probably decide to yank it and keep walking through for another.....at the least you end up with plenty of spare bolts in your toolbag...a spare SC tensioner nut is quite handy...plus well to tell you the truth, youll probably leave with some recently replaced parts...ill never need to buy an early/late tensioner since i have so many barely used "new" ones.

the SII got ****ed with a higher angularity rotating assembly when GM circumcised the deck height 1". piston acceleration/deceleration rates are much higher. cylinder filling right off the seat is quite important.

hell i dont know why im really talking about this when most heads are a 30* transition to headers and not many people leave the exit roof alone and raise the roof pocket inboard from there to ease the abrupt turn.

i also hate the F body intakes ****ty airflow distribution.
/ramblings

Thank-you for bringing this back.

And thanks for typing all that up, James.

So much for staying on topic..

I saw Chris made a post in here since the thread was reopened, what happened to that? Deleted posts prior to the post being closed then reopened were due to them being off topic, that leads me to believe Chris deleted his own post explaining what happened to that hacked up set of his heads? Confusing.

Chris did delete is own posts, two of them, why idk.

he was explaining the situation, and laid it on the owner of the heads own miss doings. all he did was port them, nothing more. what he said makes sense, why he'd take it down??? dont know. cant speak for him.

Chris had his machine shop work on them as well. He probably took it down because it's easier to disappear than try to fight it.

Just lots of people making poorly informed decisions...