Nice numbers Chargerfan68. I have a few questions, what hyd roller lifters are you using, what spring retainer pkg on your trick flow heads and whose rocker arm assembly did you use? I’m planning on building a very similar engine build. Thanks.

I used Howards Max Effort hyd roller lifters. Part no 91774. (Incidentally, i was concerned about the weight of oil i would use, since some hyd lifters are specific to weight. So i called Gaterman, who makes these, and the engineer said i would be fine using 10w40 or 15w-50 conv or synthetic....no problem at all). As far as the retainers, they are installed by Trickflow with the hyd roller spring option. So, I have no information on what retainer they are. The spring i believe is 1.545”. Maybe Dwayne P might chime in and give info on retainers. For the rockers, i used the Comp Cams Ultra pro magnum Rockers (steel) par no 1621-16. Very nice rockers. This is the second time i’ve used them. First on my own 505” in my ‘73 charger. Roller tip lands almost exactly in center of valve tip with both sets. These are bushed.
Good luck on your build. And thx.

Looks like trickflow lists the retainers as: TFS-21400425 as far as i can tell.

Does anyone here know what the factory set up was on the jetting? I’ve got a stock 440 that has 64’s in the center and the outboards are marked .082-Pass and .083- Dr.
With the throttle completely closed on all 3- (idle screw not touching even) it’s idling at 1,000 rpm and slobbering rich. I’m guessing the outboards are to big. Any recommendations? This is my first time tuning a 6 Pak. Thanks for any help.

What about the setting on the outbiard idle mixture screws? Are the lead plugs removed so you can adjust and if so, what are they adj to? Also, are you sure the butterflies are all really closed? Have you looked down the carbs at idle and confirmed they are not being held slightly open by wrong gaskets, etc.. and the linkage for the outboards to the center carb...is it incorrectly adjusted, posdibly holding oitboards open? ( although now that i think about that, the slot in the center linkage arm might not allow it to do that. Let us know what you find.

I believe your jetting is in the ballpark. I tjink stock was 62 or 63 center. And outer metering plate orifices were around .083”-086” or so.

The outboard linkages were 1/2 turn to long. And I would’ve swore all day long the butterflies were completely closed. It’s idling down around 800 rpm now. The outboard carbs lead plugs have been removed the needles seem to be all the way in and have been staked from the bottom of the throttle body. I’m way closer now than I was for sure but it’ll still make your eyes water behind it. I’ve heard that just how 6 Paks are?
Thanks for the help. It’s appreciated.

Another thing to think about is: if the center carb idle speed screw is screwed too far in, it will expose the transfer slot and the idle mix screws will become ineffective. So right now, if you screw the center carb idle mix screws in all the way, does it cause the eng to stall?

Adjuts the outboard idle mixture screws so they are between 1/4 to 1/2 turn out from gently bottom and then try from 1 complete turn to 2 full turns out from gently bottomed out with no idle speed screw contact at all to the idle stop on the carb body on the center carb. to see if that will get you a cleaner, leaner, idle mixture at 800 to 1100 RPM in neutral or park

If the center carb mixture screws are turned in all the way it does stall. It seems best idle is about 1 1/2 turns out. I’m still thinking the outboards will need to be jetted down. The Quick fuel plates looks like the way to go. This is a bone stock ‘70 440 HP, so I’m thinking .082 is to much.
Since the outboards idle screws were staked, was that something the factory did or someone along the way?

Have you confirmed that there is no vacuum leak by testing with your hand over the center carb?

Does the idle speed wonder or slow back to idle rpm after you give it throttle?

Just looking for staggered Jet ingo and I ran across this
Am surprised you lost HP with the air cleaner
I picked up !

Heres my Dyno sheet results

Stil curious on other peoples Data on Six Pack Stroker jetting
and Still looking for results on the Hughes max port
six pack intake .

My dyno session - unported aluminum intake
64 center
84/88 outboards
TTi 1 7/8 headers
Max Power was WITH air cleaner base and KN air filt.
Back to back dynoruns indicated more hp with A12 base on .

Everything changes when in bolted into car . Wish i had current 1/4 mile time slip.

Real Street results with tti’s , h pipe and 2 1/2” full exh Magnaflow muffs
5 speed passon od and 354’s kept up with my hellcat SEVERAL times and is fast as hell
after 3rd gear . Loves Hi RPM
Low end , not so much . Cant figure out yet even after recent 4:10 swap. Its quicker , but slower .. bye bye 140 mph blasts . Which is probably good for my own well being ..

X pipe swap next …

Heres the dyno pull without Air cleaner
Picked up 6-7 hp with attached .

Cam Specs