Another 416 Stroker Build-Pic Heavy

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Some day someone will tell my why an annular booster in anything except a dominator is a good thing. I’ve never seen it work.

I guess today is that day.
In 1990 I had Norm at CFS build me a ported 4781 850DP and replace the boosters with annulars.
It’s been a fantastic working carb for 30 years.
I’m sure there are better carbs available nowadays, but that’s always been the 4150 to beat for me.
 
I guess today is that day.
In 1990 I had Norm at CFS build me a ported 4781 850DP and replace the boosters with annulars.
It’s been a fantastic working carb for 30 years.
I’m sure there are better carbs available nowadays, but that’s always been the 4150 to beat for me.


Ok, so what did the annular booster correct? I get that it develops a greater pressure drop, but unless the venturi is really big does that booster gain help?

Evidently it did on that carb. I really need to burn up some bench time and flow some carb stuff.
 
Check how even bank to bank is with the 750 DL carb. Way better. J.Rob

View attachment 1715655903
wow makes more than my 426 did on the first pull before setting it up properly
torque.jpg
very good numbers
 
Carbs....in 1986 I bought a new Holley 800DP from Summit. It was $202, which was big, big money.

That carb, which I still have in a box on the shelf, ran great. It was 'the' carb we'd swap onto any engine that was having questionable carb problems, to see if it was really the carb or not. No matter what, it always ran well, made good power, and had no bad behavior.

I've always assumed it happened to be one that slipped through the production line without any bad castings, partially clogged passages, or misalignments. Whatever.

One spell was a 2 year period where it saw daily service on my driver, which was driven to the track on weekends and raced, every weekend. Took it off to install a Hilborn injection setup....which instantly dropped 1/2 second off the 1/4 mile time. lol.
 
8 pages later are we still arguing balancer? RAMM just build the engine.
I built one years ago, my garage ported 596s, Eagle cast crank (admittedly before the breakage issues and it was the last I used), hydraulic cam under .530”. Makes 480hp based on weight and ET. Has 20-something thousand miles on it with a cheap Pioneer Chinese balancer. Can we move on please?
 
8 pages later are we still arguing balancer? RAMM just build the engine.
I built one years ago, my garage ported 596s, Eagle cast crank (admittedly before the breakage issues and it was the last I used), hydraulic cam under .530”. Makes 480hp based on weight and ET. Has 20-something thousand miles on it with a cheap Pioneer Chinese balancer. Can we move on please?


You’re the only one talking about it.
 
Damn it people...stop interrupting mopers reading with your inch worm contest...
...LoL 2 or 3 pages later.
This thread has all kinds of twists and turns... from "oyeahhh, well lookie my numbers son..".to..."my balancer is god and yours is a toilet seat hanging from a crankshaft..."
and then...."though i know it all.. these are the 1st fact iron heads ive ever taken this far before..."



Good stuff.
 
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I skipped to the end. It will be nice to see actual tech not ***** size bullshit.
you should've read the thread. seems like you missed the tech (the motor is already built and dyno'd) and are only here for the ***** talk now.
 
Interested to see what your header change does
I’m interested to see/read the follow up posts on how it ultimately runs at the strip. Dyno numbers and graphs are cool, but et and mph at the strip to me will really tell the story. I’m pretty sure we really don’t ever see the “real” end results of all these builds, the dyno time and tuning. Just numbers and graphs. It’s like unfinished business. Gotta have the strip results too!:thumbsup:
 
I’m interested to see/read the follow up posts on how it ultimately runs at the strip. Dyno numbers and graphs are cool, but et and mph at the strip to me will really tell the story. I’m pretty sure we really don’t ever see the “real” end results of all these builds, the dyno time and tuning. Just numbers and graphs. It’s like unfinished business. Gotta have the strip results too!:thumbsup:
as I understand it would be nice to see how it relates to track times but there are a lot of considerations ,chassis, what gear ratio tires a lot of variables that will determine the ET. A lot of these motors are bound for hot rods and street cars that see very little time at the track, let's just say whatever he puts that into we'll haul ***!
 
WHERE THE **** DID PEN15 SIZE AND BALANCERS come from . and the 1/4 mile is not the be all end all of builds . how does it do on the street and road courses . this engine sounds like a winner damn the et
 
WHERE THE **** DID PEN15 SIZE AND BALANCERS come from . and the 1/4 mile is not the be all end all of builds . how does it do on the street and road courses . this engine sounds like a winner damn the et
**** man you sound pissed! Not sure how Willy size and balancers applies here either, but mentioning that it would be nice to see 1/4 mile times with some of these builds that Ramm shares is not acceptable? Oh, I didn’t know. All dyno, how much horsepower and torque it makes and that everyone agrees it’ll rip on the street is all that matters. Ok.:rolleyes:
 
**** man you sound pissed! Not sure how Willy size and balancers applies here either, but mentioning that it would be nice to see 1/4 mile times with some of these builds that Ramm shares is not acceptable? Oh, I didn’t know. All dyno, how much horsepower and torque it makes and that everyone agrees it’ll rip on the street is all that matters. Ok.:rolleyes:

First of all why just me? Second of all I have ZERO control of what my customers do with THEIR engines after I'm done giving them hopefully what they wanted. Thirdly I too wish for feedback after and dont often get enough of it. The feedback I do get is often centered around driveability, how it starts, how it sounds, how it "never did that before", etc.... Very seldom are my customers dragstrip oriented and even if they were to get to the strip , I doubt they possess any dragstrip experience or even proper tires so there's that. One thing I can say with confidence is that past experience with SBM's like this is that it will indeed "rip" on the streets regardless. Sorry for the lack of dragstrip data. J.Rob
 
You might tell me different cuz you run the dyno, but 10HP on a 500HP engine is 2%. I'd consider that 'insignificant' as it probably is right around the accuracy level of the meters, sensors, and dyno itself. Right or wrong?

I'm not entirely sure what you are asking here. 10HP loss or gain is not insignificant as far as dyno accuracy goes--1-3 hp yes but more important is torque @ "the hit" tells me more about how the test is going to go than a 1-3hp loss/gain. 10hp on any dyno either way should be easy to gain back if you lost it, if you didn't make a whole pile of changes at once. I usually do 2 "pulls" at a time back to back and the data is very reliable.

All being told-without the electric water pump this is a solid 520-525 hp engine all day--I ran this pretty hard executing lots of warm up idle time, static load testing, and 15 rapid dyno pulls, oil pressure @ idle and 190 F oil temp was never below 40 psi, so I'm confident this engine is going to live a long and healthy life. J.Rob
 
Damn it people...stop interrupting mopers reading with your inch worm contest...
...LoL 2 or 3 pages later.
This thread has all kinds of twists and turns... from "oyeahhh, well lookie my numbers son..".to..."my balancer is god and yours is a toilet seat hanging from a crankshaft..."
and then...."though i know it all.. these are the 1st fact iron heads ive ever taken this far before..."



Good stuff.

You really are hard to understand Justin, and I don't appreciate your snide little jabs even though they are barely comprehensible gibberish. "Though I know it all" ??? If I knew it all I'd sell you my dyno and flowbench as I wouldn't need them anymore. Also I never said "these are the 1st fact iron heads ive ever taken this far before" What I said was I've never had a customer pay to have factory iron heads ported and then strapped to a high compression 416 before so I was very interested and not all that sure it would make the 500+HP goal<<mainly because I DON'T "know it all" . Wish you had more to contribute because people like you make me realize sharing is a waste of my time better spent elsewhere. J.Rob
 
First of all why just me? Second of all I have ZERO control of what my customers do with THEIR engines after I'm done giving them hopefully what they wanted. Thirdly I too wish for feedback after and dont often get enough of it. The feedback I do get is often centered around driveability, how it starts, how it sounds, how it "never did that before", etc.... Very seldom are my customers dragstrip oriented and even if they were to get to the strip , I doubt they possess any dragstrip experience or even proper tires so there's that. One thing I can say with confidence is that past experience with SBM's like this is that it will indeed "rip" on the streets regardless. Sorry for the lack of dragstrip data. J.Rob
I’m just posting my thoughts as they regard your thread here, if there were others posting builds and I felt inclined to insert my comments perhaps I would too. I think I worded them as a “hey, let’s see some drag strip results too” that’s all. Honestly, with these type hp/tq numbers on the street it is hard for me to quantify? (I think that’s the word I’m looking for) Insanely fast, a beast, rips, Etc and some of these big hp numbers? I get all these descriptions but they aren’t the same as time slips (for me) once everything’s sorted. It’s obvious someone will have a raging beast of a power plant that makes ungodly power, I just like seeing timeslips as I can wrap my brain around those kinds of numbers, shake my head in agreement and maybe say “Holy **** that is f-n fast!” Apologies for junking up your thread.
 
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The build, and the documentation of it are awsome. I think the tendency for people to want drag strip results are because of other "engine builders" (one in particular) who used absolutely false dyno numbers as a "sales tool" on this site in the past. I wouldn't sweat it a bit! And again, thanks for posting!
 
Dyno is a tool to give you an idea of what you are working with , you can have 900 hp and a crap et if the chassis suspension and tires are not up to handling 900 hp . i've seen 600 hp cars turn a 14.0 et smoking the tires for 1/8th a mile
 
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