SBM 418 stroker MPFI intake

[madmax2]

I want to make a MPFI intake manifold for my 418 stroker.
Currently my combo is a 418 stroker, 10:1 cr,
Edelbrock Heads home ported (280cfm int 196cfm exh @.550")
Lunati solid flat 401A1LUN 270º adv, 243º@050, .548" lift, 110º/104º
weiand xCelerator intake,
Holley HP ecu with Terminator TBI 900cfm,
sequential ignition with eight IGN-1A coils.
The car is a 1970 Dodge early a-body,
6-speed manual from a Challenger 2009 and 3.90:1 rear end.

The car and engine run very well, it responds well at all speeds. I haven't taken it to a dynamometer, but it's a great kick in the pants on the street.

Since the Holley HP EFI supports 8 injectors in sequential mode, I wanted to get an EFI intake and rewire the injectors and buy a 90mm TB
The Weiand Xcelerator seems very good for street use, but they're hard to find used I don't want to modify it to solder the bungs. It has a power band of 1500-7000 rpm.
From what I saw, the other single planes start at 2500, 3000 and 3500 rpm (M1, Victor 340, Strip Dominator and Super Victor)
The easiest thing would be to use a Super Victor EFI but the power band is 3500-8000, but since my car is for having fun on the street I wouldn't want to lose torque at <3000 rpm.
On the other hand, there is the option of using a base from a Tunnel Ram to modify it and use or make something similar to the Holley Hi-ram.

The question is: What would you do, modify a single plane (which one) or a tunnel ram (which one) or would you use the Super Victor directly?

 

[MOPAROFFICIAL]

The xcellerator sounds like a fine choice that you can add a space to.
The vic 340 is probably what you'd use if you had more camshaft.

Just port the manifold about 3 inches in and correct the flange, clean up the plenum to runners roof.
Use gaskets and dykem / scribe.

280 at the head usually end up only feeding an actual 240 cfm to the cylinder due to the intake manifold flowing less.

 

[madmax2]

My Xcelerator is ported too,
1 297,17 cfm
2 293,27 cfm
3 302,18 cfm
4 304,03 cfm
5 301,23 cfm
6 293,27 cfm
7 283,49 cfm
8 305,58 cfm

I'm going to search and see what I find.

 

[DNasty777]

I modified a cheap chinese air-gap clone. I have some pictures in my build thread if your interested. Page 6 covers the manifold modification.

 

[Cal Tonsley]

FWIW, in case this helps, Edelbrock use the Victor EFI in the ProFlo 4 Sequential EFI for the small block Mopar.
While I’m running a relatively small 230/238 roller on 112 lobe separation with .564”/.585” lift on 1.6 rockers, my 3.55:1, 727 auto, 410 with this EFI makes over 500 ft lbs torque anywhere in the 2000-4500 rev range and has strong, usable power on the street right from idle though to about 5400.

 

[madmax2]

FWIW, in case this helps, Edelbrock use the Victor EFI in the ProFlo 4 Sequential EFI for the small block Mopar.
While I’m running a relatively small 230/238 roller on 112 lobe separation with .564”/.585” lift on 1.6 rockers, my 3.55:1, 727 auto, 410 with this EFI makes over 500 ft lbs torque anywhere in the 2000-4500 rev range and has strong, usable power on the street right from idle though to about 5400.

It was what I wanted to hear, the voice of experience

 

[madmax2]

this, the Super Victor?

 

[Cal Tonsley]

this, the Super Victor?
View attachment 1716451160

Yes, I think they have now rebranded it as Super Victor, mine is the same part number but being about 6 years old has “EFI” branding cast into it. Picture below FYI.

 

[Cal Tonsley]

Here’s a link to the part on the Edelbrock site;
https://www.edelbrock.com/shop/supe...N6QvmGFE9aBa_fKshvP6TK-Dpbq6xUAl0QuGatZVrEpXV

 

[Max1196]

Try this part#.

 

[madmax2]

Try this part#.
View attachment 1716451509

no data

 

[Max1196]

It's the site, others aren't working today
try this then, looks like someone posted the # anyway.

 

[DNasty777]

Here’s a link to the part on the Edelbrock site;
https://www.edelbrock.com/shop/supe...N6QvmGFE9aBa_fKshvP6TK-Dpbq6xUAl0QuGatZVrEpXV

What fuel rails are those?

 

[madmax2]

Another option I'm thinking about is to use a tunnel-ram base, weld bungs and do something similar to this....

and with a spacer I could lengthen the ducts (if needed)

 

[Cal Tonsley]

What fuel rails are those?

Edelbrock

 

[DNasty777]

Edelbrock

Weird, those are different than the Edelbrock fuel rails that I have. I like that attachment style more.

 

[Mean416]

I vote tunnel ram. I may be biased though.

Thread 'EFI BUILD THREAD' EFI BUILD THREAD

 

[madmax2]

It's the site, others aren't working today
try this then, looks like someone posted the # anyway.

View attachment 1716452047

thanks, the Super Victor EFI

 

[madmax2]

Here’s a link to the part on the Edelbrock site;
https://www.edelbrock.com/shop/supe...N6QvmGFE9aBa_fKshvP6TK-Dpbq6xUAl0QuGatZVrEpXV

For a month now I've been having trouble accessing this site and others in its group, Cloudflare is blocking me.

 

[madmax2]

I vote tunnel ram. I may be biased though.

Thread 'EFI BUILD THREAD' EFI BUILD THREAD

I already read the thread, very nice.... any news?

 

[DNasty777]

I vote tunnel ram. I may be biased though.

Thread 'EFI BUILD THREAD' EFI BUILD THREAD

Neat!

 

[Mean416]

I already read the thread, very nice.... any news?

If there was any news I'd share it. Much as I love the mopar hobby my focus is on my business right now so my time spent working on this stuff is very thin.