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EFI: One 4-barrel o Dual-Quad TBI in a SBB 418 stroke #3220530 03/15/24 01:08 AM 03/15/24 01:08 AM
Joined: Jan 2004 Posts: 143 Buenos Aires, ARGENTINA madmax2 OP member
madmax2 OP member Joined: Jan 2004 Posts: 143 Buenos Aires, ARGENTINA	I currently have an SBM 418 stroker running with Holley HP EFI with 4-barrel TBI over weiand single plane intake (x-celerator). Looking ahead to future improvements and since the Holley HP ECU can handle 8 injectors, I thought about making it MPFI using a Super Victor EFI intake or getting another 4-barrel TBI and using a tunnel-ram. not for running, just for personal taste. what do you think? pd: If I go for a 2x4 configuration that intake recommends Last edited by madmax2; 03/15/24 01:17 AM. '70 Dodge GTX sb 418ci (Early A-body), Lunati Solid cam 270°/243°@.050/.548", Edelbrock Heads, Weiand X-CELerator, Holley Terminator EFI, Tremec 6 sp manual, 3.90:1, TTI Headers.

Re: EFI: One 4-barrel o Dual-Quad TBI in a SBB 418 stroke [Re: madmax2] #3220534 03/15/24 02:26 AM 03/15/24 02:26 AM
Joined: Aug 2003 Posts: 43,157 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,157 Bend,OR USA	I think a system that can and does controls eight direct port injectors would be more efficient and make more power than dual wet EFI throttle bodies Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

Re: EFI: One 4-barrel o Dual-Quad TBI in a SBB 418 stroke [Re: madmax2] #3220583 03/15/24 11:18 AM 03/15/24 11:18 AM
Joined: Jan 2003 Posts: 31,019 Oregon A AndyF I Win
AndyF I Win A Joined: Jan 2003 Posts: 31,019 Oregon	Which Holley ECU are you using? If you have a Terminator, HP or Dominator ECU then you have the ability to do all sorts of things. The older Holley systems are a little more limited in what they can do.

Re: EFI: One 4-barrel o Dual-Quad TBI in a SBB 418 stroke [Re: AndyF] #3220584 03/15/24 11:22 AM 03/15/24 11:22 AM
Joined: May 2019 Posts: 712 Lake Villa Il INTMD8 super stock
INTMD8 super stock Joined: May 2019 Posts: 712 Lake Villa Il	He is running Holley HP ecu. I think it's worth going multi port injection. Whatever intake you decide to use I would run multi port. So, convert a single 4bbl or tunnel ram intake to multi port. (I wouldn't get another TBI unit for the 2x4 setup) Last edited by INTMD8; 03/15/24 11:23 AM. 69 Charger. 438ci Gen2 hemi. Flex fuel. Holley HP efi. 650rwhp @7250 510rwtq @5700

Re: EFI: One 4-barrel o Dual-Quad TBI in a SBB 418 stroke [Re: INTMD8] #3220681 03/15/24 06:50 PM 03/15/24 06:50 PM
Joined: Jan 2003 Posts: 31,019 Oregon A AndyF I Win
AndyF I Win A Joined: Jan 2003 Posts: 31,019 Oregon	I use a good single plane intake with a Holley throttle body. Edelbrock makes the Super Victor EFI for SB Mopar engines so that is what I'd use. I'm assuming that since it is a 418 it has good heads and the Super Victor intake will fit and work on there. Last edited by AndyF; 03/15/24 06:51 PM.

Re: EFI: One 4-barrel o Dual-Quad TBI in a SBB 418 stroke [Re: Cab_Burge] #3220709 03/15/24 09:09 PM 03/15/24 09:09 PM
Joined: May 2004 Posts: 12,386 Taxes & Virus's R-US, NY Dragula I Live Here
Dragula I Live Here Joined: May 2004 Posts: 12,386 Taxes & Virus's R-US, NY	https://kinsler.com/Shop/product/kinsler-sb-mopar-traditional-call-for-pricing/ '70 Cuda,...605 EFI Hemi Street Car (6.20 best pass, 1.33 60ft) https://www.youtube.com/watch?v=WYw6RA-k5Bk (6.25 at 108.75mph from inside car) https://www.youtube.com/watch?v=3zQEb9uxFng (6.25 at 108mph from outside car) https://www.youtube.com/watch?v=JCvfzsC4NgM (9.9) '66 Barracuda AWB Stretched nose Blown 440 Car in build stage '71 Duster Drag Car 400 Low Deck 512 best 6.002 at 115.44mph https://www.youtube.com/watch?v=Znuo3jMUXTk

Re: EFI: One 4-barrel o Dual-Quad TBI in a SBB 418 stroke [Re: Dragula] #3220718 03/15/24 09:46 PM 03/15/24 09:46 PM
Joined: Jan 2003 Posts: 31,019 Oregon A AndyF I Win
AndyF I Win A Joined: Jan 2003 Posts: 31,019 Oregon	Kinsler stacks would be the last thing I'd recommend for a street engine!

Re: EFI: One 4-barrel o Dual-Quad TBI in a SBB 418 stroke [Re: AndyF] #3220727 03/15/24 10:22 PM 03/15/24 10:22 PM
Joined: Aug 2003 Posts: 43,157 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,157 Bend,OR USA	Originally Posted by AndyF Kinsler stacks would be the last thing I'd recommend for a street engine! Talk about a touchy throttle pedal Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

Re: EFI: One 4-barrel o Dual-Quad TBI in a SBB 418 stroke [Re: madmax2] #3221168 03/18/24 03:53 AM 03/18/24 03:53 AM
Joined: Jan 2004 Posts: 143 Buenos Aires, ARGENTINA madmax2 OP member
madmax2 OP member Joined: Jan 2004 Posts: 143 Buenos Aires, ARGENTINA	thanks you, go to MPFI single plane and reuse the TBI body only. '70 Dodge GTX sb 418ci (Early A-body), Lunati Solid cam 270°/243°@.050/.548", Edelbrock Heads, Weiand X-CELerator, Holley Terminator EFI, Tremec 6 sp manual, 3.90:1, TTI Headers.

Re: EFI: One 4-barrel o Dual-Quad TBI in a SBB 418 stroke [Re: madmax2] #3221211 03/18/24 12:03 PM 03/18/24 12:03 PM
Joined: Apr 2003 Posts: 3,509 Tulsa, Oklahoma 340Cuda master
340Cuda master Joined: Apr 2003 Posts: 3,509 Tulsa, Oklahoma	My son has an engine not too dissimilar to yours. He could see that even with the Holley 4150 style 1,000 CFM throttle body with port injection he was still pulling some vacuum. He went to a tunnel ram and another throttle body and picked up a tenth if I remember correctly. It it has been on Drag Week many times so it is a true street strip car. Currently configuring a Kinsler stack injection (converting to EFI) for it but that will be a while before it sees the track.

Re: EFI: One 4-barrel o Dual-Quad TBI in a SBB 418 stroke [Re: madmax2] #3221238 03/18/24 02:30 PM 03/18/24 02:30 PM
Joined: Jan 2003 Posts: 5,315 Land 'O Lakes RoadRunnerLuva master
RoadRunnerLuva master Joined: Jan 2003 Posts: 5,315 Land 'O Lakes	Originally Posted by madmax2 I currently have an SBM 418 stroker running with Holley HP EFI with 4-barrel TBI over weiand single plane intake (x-celerator). Looking ahead to future improvements and since the Holley HP ECU can handle 8 injectors, I thought about making it MPFI using a Super Victor EFI intake or getting another 4-barrel TBI and using a tunnel-ram. not for running, just for personal taste. what do you think? pd: If I go for a 2x4 configuration that intake recommends Can you please give us some details on your engine What is the compression ratio, what heads are you using, camshaft, etc... thanks.. Plymouth Makes It!

Re: EFI: One 4-barrel o Dual-Quad TBI in a SBB 418 stroke [Re: RoadRunnerLuva] #3221346 03/19/24 03:47 AM 03/19/24 03:47 AM
Joined: Jan 2004 Posts: 143 Buenos Aires, ARGENTINA madmax2 OP member
madmax2 OP member Joined: Jan 2004 Posts: 143 Buenos Aires, ARGENTINA	Quote Can you please give us some details on your engine What is the compression ratio, what heads are you using, camshaft, etc... thanks.. 10:1 CR, Lunati solid flat 404A1LUN (270ºadv, 243º@050, .548", 104º/110º), hand ported edelbrock head 280cfm@550", ported single plane XCELerator 300cfm. I have a street car Last edited by madmax2; 03/19/24 10:39 PM. '70 Dodge GTX sb 418ci (Early A-body), Lunati Solid cam 270°/243°@.050/.548", Edelbrock Heads, Weiand X-CELerator, Holley Terminator EFI, Tremec 6 sp manual, 3.90:1, TTI Headers.

Re: EFI: One 4-barrel o Dual-Quad TBI in a SBB 418 stroke [Re: madmax2] #3221443 03/19/24 01:58 PM 03/19/24 01:58 PM
Joined: Jan 2003 Posts: 5,315 Land 'O Lakes RoadRunnerLuva master
RoadRunnerLuva master Joined: Jan 2003 Posts: 5,315 Land 'O Lakes	Originally Posted by madmax2 Quote Can you please give us some details on your engine What is the compression ratio, what heads are you using, camshaft, etc... thanks.. 10:1 CR, Lunati solid flat 404A1LUN (270ºadv, 241º@050, .548", 104º/110º), hand ported edelbrock head 280cfm@550", ported single plane XCELerator 300cfm. I have a street car Nice! It's very similar to the engine (418") in my street Duster. I have heavily ported J heads.. and a Bullet Racing solid cam #30400, using a ported/gasket matched Edelbrock single plane Victor intake. Fuel delivery is a Race Demon 850 cfm. Plymouth Makes It!

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