What a Rush

[The Horvaths]

I guess like you said, one step forward, two steps back. That should be more than enough fuel and air.

It’s old school cool. Dylan can learn a thing or two about carburetor adjustment. Having an AFR meter is so much better than how we learned to set one up. But, it’s just for setup. He’s still going to be tweaking it regularly. He’s also going to be able to learn fuel injection on another vehicle. We really have way too much invested into this beautiful beast to keep flogging it with wasted fuel.

I’m really looking forward to these steps back (-wards in time)!

- dad

 

[cantflip]

Temptations are sometimes hard to deny.

Actually, as I read more and more (and more!) about the FiTech, I came upon this little gem. The EFI-8 1200HP unit has been flow tested by afficianados and found to flow around 835-850 CFM when normally aspirated. That’s plenty enough to spin up 493 cubic inches to about 5500 RPM. There’s just one little problem. This engine was designed for a shift point of 6500 to 6800 RPM. It’s just barely starting to breath well at 5500 RPM. As well, I’m just sick and tired of washing down the cylinder walls with fuel.

So..

View attachment 157515

Merry Christmas, son. We’re going to need a bit more plumbing and a much, much bigger-mouthed breather/filter. The FiTech will make an awesome pump gas setup for another vehicle. This massive beast is a 1050 CFM Holley three-stage dominator. It’s actually got a stage between idle and main jets. It’s a 4500 series, so, a proper manifold is a good thing. There’s a noticeable difference in the breathability and air speed of the 4150 and the 4500 series carbs. This manifold will work the 4500 just right.

HUGE BONUS!

We’re going to initially set the carb up using an AFR meter and the very high dollar Unleaded fuel. Then, we can switch over to leaded fuel at a third of the price! Yes! It’s much, much easier to find and comes in very high octane ratings. Once tuned nicely, we’ll plug the O2 port and the carb should only take minor tweaks from there.

Kiss any dreams of streetability goodbye. It’s now very much a purpose-built beastie. It’s going to be freaking amazing. I’m downright sure of it.


- dad

I thank you for taking on this challenge... This thread should become required reading for those who believe they will bolt on FI and just leave it alone...

IDK if the casual readers will realize just how competent you are with the electronics... the majority who want to do this stuff don't seem to own a DMM. You certainly went far deeper into the effort of tune writing than I want to.

I think the latest solution will be incredible... sorry she won't be nice for street use.

 

[The Horvaths]

I might have been able to get there with two 600HP throttle bodies. They would have allowed more air flow. However, I now know (learning the hard way) that it would certainly be an uphill battle. It’s been like cramming for a very technical college course’s final exam. Only I missed every class and skipped over half of the labs. I truly believe that this represents two steps in the right direction!

- dad

 

[The Horvaths]

BTW: we chose to not go with the 1150 CFM model. While it certainly may have worked well, 1050 is quite sufficient and may even help a little with torque development.


Like this beast needs more torque. Right.


- dad

 

[The Horvaths]

Then again..
A little light reading this morning:

https://www.musclecardiy.com/performance/induction-math-high-performance-engines/


I’m still in pretty darn deep despite going to a carburetor. So many decisions and so little time.

- dad

 

[cantflip]

I might have been able to get there with two 600HP throttle bodies. They would have allowed more air flow.

- dad

Yep... it hasn't been enough of a PITA so far, go for it

 

[The Horvaths]

How to get the problems solved when using this self-learning EFI system and a very large cam:

The FiTech and manifold have been surgically extracted. More steps in the right direction to follow..
- dad

 

[65Fury440]

Stopping by on coffee time, you should be firing this badboy up with the Dominator soon no?
I am going the same route with the carb. Where did you source yours from?
Not sure about the 2 or 3 circuit yet, been reading a bit about the transition, my engine has way less compression and cam than yours.
Please forge ahead, your fans are counting on you!

 

[The Horvaths]

Stopping by on coffee time, you should be firing this badboy up with the Dominator soon no?
I am going the same route with the carb. Where did you source yours from?
Not sure about the 2 or 3 circuit yet, been reading a bit about the transition, my engine has way less compression and cam than yours.
Please forge ahead, your fans are counting on you!

We should fire it up this weekend. Dallas now has a Summit hub, so we got the Dominator there. It is my understanding that the 3 circuit carb is a better design (for racing, we have the tech to tune it, however. -dad) in general, but i will check with my dad for his opinion.

Gasket matching new intake:

 

[The Horvaths]

Dun-dun-DUUUN!

Progress continues..

 

[The Horvaths]

Progress!

 

[300rag]

Progress!
View attachment 158208

I clicked on the picture. The video is not working

 

[The Horvaths]

I clicked on the picture. The video is not working

Hmm... I'll have to check on that tomorrow.

 

[The Horvaths]

Alternator mount. Strong..
..like bull!

We need to re-wire the fuel pump, flush the fuel lines, wire the alternator and it should be ready for a start. The oil got trashed by the FiTech’s propensity for fuel dumpage. It’s going to be changed. Transmission fluid checks, fuel cell straps, brake check & bleed, and some street tires. Then a test drive or two and it’s exhaust system time. We’re making some real progress now.

- dad

 

[65sporty]

Dylan's home for Christmas? Or did you get younger in the second pic. Isn't it great to have a second set of hands to help do something on the car.

 

[LocuMob]

Alternator mount. Strong..
..like bull!

View attachment 158468 View attachment 158469

We need to re-wire the fuel pump, flush the fuel lines, wire the alternator and it should be ready for a start. The oil got trashed by the FiTech’s propensity for fuel dumpage. It’s going to be changed. Transmission fluid checks, fuel cell straps, brake check & bleed, and some street tires. Then a test drive or two and it’s exhaust system time. We’re making some real progress now.

- dad

I'd love to live in your neighborhood, hear that fire up, and I'd be like a kid that heard the ice cream truck!

 

[65Fury440]

Look great!!
Did you notice how far back the motor is set on these cars? My valve cover almost hits the seam on the firewall.
What is on your hood scoop? Is it a hood support that goes on your carb stud kinda thingy?
Nice work on the alternator.That car is a beast!

 

[The Horvaths]

Look great!!
Did you notice how far back the motor is set on these cars? My valve cover almost hits the seam on the firewall.
What is on your hood scoop? Is it a hood support that goes on your carb stud kinda thingy?
Nice work on the alternator.That car is a beast!

It's just a spacer between the scoop and hood for support.
I noticed the engine spacing. Especially after taking the damn thing out four times. The bell housing bolts are a real pain!

 

[LocuMob]

It's just a spacer between the scoop and hood for support.
I noticed the engine spacing. Especially after taking the damn thing out four times. The bell housing bolts are a real pain!

I've done my Polara four times also! I remove the trans mount and lower the tailshaft to access the bolts, and as long as I have the column shifter, all that linkage too. Yeah, it can suck! And I'm going to do it all over again!

 

[LocuMob]

Have you or are you going to weigh the car? I've weighed mine once but am not sure the scale was accurate. And being a drag car, I suppose it has lost some weight? Definitely curious about it.