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-   -   low compression 548 dyno testing has begun!! (https://www.offshoreonly.com/forums/general-q/344612-low-compression-548-dyno-testing-has-begun.html)

SB 03-03-2017 04:41 AM

Boosters and squirters (unless those flat head screws are hiding the squiters in the pic)

articfriends 03-03-2017 05:07 AM

1 Attachment(s)

Originally Posted by SB (Post 4534122)
Boosters and squirters (unless those flat head screws are hiding the squiters in the pic)

There are squirters, just hard to see, there isnt conventionsl boosters, heres the 3rd picture i took, if you zoom in you will see a stepped machined area with slots and tiny holes

ezstriper 03-03-2017 01:37 PM

Smitty, thats weird looking not sure how that would work with no venturies to help draw fuel in ?

articfriends 03-03-2017 10:29 PM


Originally Posted by ezstriper (Post 4534260)
Smitty, thats weird looking not sure how that would work with no venturies to help draw fuel in ?

His idea is air will pull fuel thru the slots/feeds he built into the venturis. Before ever building the first complete main body he experimented with the design and adjusted things to get proper signal/fuel curve or draw. The design works when we tested it on dyno, it doesnt, however, out perform or keep up 100% with his modded 4150 that does so well, still in the experiment stage.

Panther 03-05-2017 10:12 PM

Pretty cool stuff!!!

Just a hunch but I wouldn't be surprised if the carb makes a little bit more torque and HP.

Biggest complaint I have with EFI engines is the lack or torque feeling at higher rpm where their carved brethren seem to be better IMHO.

I like EFI for the safety factor the most and I'm learning more and more about tuning every day!

articfriends 03-05-2017 11:55 PM

I been bolting and fitting efi stuff on dyno a hour or two a day, using mefi, was going to use a mefi 4 harness and ecu as its already hacked up BUT i have a virgin mefi3 harness that seems to reach everything with very little mods, flowed and checked new injectors, they match well and are good to go, luckily a gm tps and iac bolt to the 2200 cfm throttle body, after looking at rons holley and seeing a extra wire on tps i started thinking i was fukked as far as tps but as long as it sweeps from .5 volts to 5 volts when i test it im goid to go. I expect to pick up some tq with ability to set timing tables vs the mechanical distributer we were running that had all timing in by 4000 but dont have high hopes of outperforming the good 4150 numbers as far as hp. Perf trends software shows a 20 hp increase over the 4150 and i wouldnt be surprised if it DOES make 20 more hp than the QF and both dominators as they didnt really break 660 hp with mufflers on but am not expecting to miraculously make 700 hp.

Baja Rooster 03-14-2017 03:34 PM

*Ahem*

F-2 Speedy 03-14-2017 03:53 PM

My carbs are headed back, Huge shout out to Smitty and Norm, when Norm said noway they will flow enough fuel to support my cause Smitty made em work, big thanks my friend.

offshorexcursion 03-14-2017 10:59 PM

It's very cool how much time and work Norm and Smitty put into your carbs! Very cool stuff

F-2 Speedy 03-15-2017 06:23 AM


Originally Posted by offshorexcursion (Post 4537610)
It's very cool how much time and work Norm and Smitty put into your carbs! Very cool stuff

That's for sure, anyone else would of probably just sent em back, Smitty knew I had some coin invested in these carbs and was bound and determined to make them work and did.


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