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mechanical injection ? #833680
10/19/10 10:23 AM
10/19/10 10:23 AM
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ontario canada
mac56 Offline OP
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How big of a role does the intake and throttle body play with port injection? It seems there is no limit to the size of throttle bodies being used. Is more air capabilty better and is a tunnel ram better with 2 throttle bodies or is a single plain that flows well just as good. I'm just speaking general terms. In specfic terms will my B-1 orginal single plain work well with a terminator on top or would you go tunnelram?
Thanks

Re: mechanical injection ? [Re: mac56] #833681
10/19/10 11:00 AM
10/19/10 11:00 AM
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The Swamp
MegaDart Offline
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IMO, a tunnel ram with hat injection has more potential then a low rise intake with one or even two throttle bodies. But I have no scientific data to back that up!! lol

6258128-fuelliner1.jpg (302 downloads)
Re: mechanical injection ? [Re: MegaDart] #833682
10/19/10 11:37 AM
10/19/10 11:37 AM
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ontario canada
mac56 Offline OP
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Is that a Hat on top of your tunnelram Wayne?

Re: mechanical injection ? [Re: mac56] #833683
10/19/10 11:47 AM
10/19/10 11:47 AM
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Sweet Home Alabama
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MRMOPAR622 Offline
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Sweet Home Alabama
I run a tunnel ram with 2 Ron's Terminators(2950 cfm) on mine. It works really well. I have never run 1 on just a single carb. intake,so I really cannot say its better. This is my first time running alochol,but all my engines have always run better and made more power with a tunnel ram on racing gas.


"To Be The Man'You Have Got To Beat The Man" "T/D and Pro-Bracket Racer"
Re: mechanical injection ? [Re: MRMOPAR622] #833684
10/19/10 11:52 AM
10/19/10 11:52 AM
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Sweet Home Alabama
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MRMOPAR622 Offline
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Sweet Home Alabama
Almost forgot I'm sure Ron's or any of the others can get you running good with your intake. It might not be a bad idea to step up to a better intake now instead of later.


"To Be The Man'You Have Got To Beat The Man" "T/D and Pro-Bracket Racer"
Re: mechanical injection ? [Re: MRMOPAR622] #833685
10/19/10 12:12 PM
10/19/10 12:12 PM
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St. Charles, MO.
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Slingshot383 Offline
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The plenum in a tunnel ram helps airflow, both in wet or dry systems. A well ported tunnel ram with a hat or a pair of throttle bodies can actually make more power over a broader rpm range than an 8-stack system.


1994 Undercover Chassis 125" altered stack injected big block, soon blown and injected Member of The Torque and Recoil Club
Re: mechanical injection ? [Re: mac56] #833686
10/19/10 12:12 PM
10/19/10 12:12 PM
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The Swamp
MegaDart Offline
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Quote:

Is that a Hat on top of your tunnelram Wayne?




Yes it was an Enderle bug catcher

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Re: mechanical injection ? [Re: MegaDart] #833687
10/19/10 01:02 PM
10/19/10 01:02 PM
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Taxes & Virus's R-US, NY
Dragula Offline
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I run efi with a bug catcher, and the bigger the butterfly, the more sensative it is to throttle inputs.I would think, the same applies for the mechanical injection as well.


'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: mechanical injection ? [Re: Dragula] #833688
10/19/10 06:24 PM
10/19/10 06:24 PM
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New York
polyspheric Offline
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This true, and very annoying: the amount of air entering for a specific change in throttle disc angle is higher as the disc diameter goes up, and it makes the car "nervous".
What needed is a snail-cam link for variable ratio:
http://victorylibrary.com/mopar/TB-linkage.htm


Boffin Emeritus
Re: mechanical injection ? [Re: mac56] #833689
10/19/10 08:32 PM
10/19/10 08:32 PM
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440Jim Offline
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Quote:

How big of a role does the intake and throttle body play with mechanical port injection?


Good question. I was wondering if my Ron's Flying Toilet mechanical injection would benefit from a "carb" spacer on the single "carb" intake (Indy), like many carbureted systems do in my application.


1993 Daytona, 5.50 at 130mph (1/8) 1.19 sixty ft (PG). Link to 572 B1 - Part 1
Re: mechanical injection ? [Re: 440Jim] #833690
10/19/10 09:44 PM
10/19/10 09:44 PM
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Central Ohio, USA
Bigbeep Offline
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I was wondering that same thing just the other night.

Re: mechanical injection ? [Re: Bigbeep] #833691
10/19/10 09:58 PM
10/19/10 09:58 PM
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gulfport, ms, west mi
rowin4 Offline
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I can only say from my buddy's 540 cube alky chevy , his car with one large toilet with a sniper intake ran just as fast as it did with two on a tunnel ram. Less tuning low hood scoop, goes like a bat out of heck.



it's ok to butt heads, just don't do it with a butthead
Re: mechanical injection ? [Re: polyspheric] #833692
10/20/10 01:10 AM
10/20/10 01:10 AM
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Sherwood park, Alberta.
go green Offline
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Quote:

This true, and very annoying: the amount of air entering for a specific change in throttle disc angle is higher as the disc diameter goes up, and it makes the car "nervous".
What needed is a snail-cam link for variable ratio:
http://victorylibrary.com/mopar/TB-linkage.htm




Were do you come up with this stuff ?
I have raced a B1 540 CID with a 2300 cfm T2 mechanical fuel injection system and it was not a light switch throttle . It behaved quite predictable and was not any angrier than when I had a carburetor on it.
The engine I have in the cuda has 2 1500 CFM throttle bodies on it with a .870 " lift cam shaft that will idle at 700 RPM .
I would not hesitate to parallel park it between two BMW's , its a complete 2000 HP pussycat .

Engines are not mathematical formulas and never will be , that being said that's why there are a hundred different ways to skin the proverbial cat.



6.50 @ 226 MPH 4.25 @ 186 MPH
https://www.youtube.com/watch?v=YX86DHGKBo0
Re: mechanical injection ? [Re: 440Jim] #833693
10/20/10 05:33 AM
10/20/10 05:33 AM
Joined: Oct 2005
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ontario canada
mac56 Offline OP
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Quote:

Quote:

How big of a role does the intake and throttle body play with mechanical port injection?


Good question. I was wondering if my Ron's Flying Toilet mechanical injection would benefit from a "carb" spacer on the single "carb" intake (Indy), like many carbureted systems do in my application.



That would be awesome if I could just put a 2 inch spacer under a single terminator to get a little more volume and just run a single.

Re: mechanical injection ? [Re: mac56] #833694
10/20/10 12:11 PM
10/20/10 12:11 PM
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St. Charles, MO.
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Slingshot383 Offline
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Since it's dry airflow, put the intake on a flow bench, and try out the different thickness spacers and see what it changes, if anything.


1994 Undercover Chassis 125" altered stack injected big block, soon blown and injected Member of The Torque and Recoil Club
Re: mechanical injection ? [Re: Slingshot383] #833695
10/20/10 12:54 PM
10/20/10 12:54 PM
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ontario canada
mac56 Offline OP
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Quote:

Since it's dry airflow, put the intake on a flow bench, and try out the different thickness spacers and see what it changes, if anything.



Thanks for the idea

Re: mechanical injection ? [Re: mac56] #833696
10/20/10 08:19 PM
10/20/10 08:19 PM
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440Jim Offline
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If you do that, be sure and include the throttle body, not just the spacer.

Re: mechanical injection ? [Re: 440Jim] #833697
10/21/10 05:39 AM
10/21/10 05:39 AM
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ontario canada
mac56 Offline OP
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Quote:

If you do that, be sure and include the throttle body, not just the spacer.



Thanks Jim. Have you used the set up you pictured?

Re: mechanical injection ? [Re: mac56] #833698
10/21/10 09:53 PM
10/21/10 09:53 PM
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440Jim Offline
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I have been running that Ron's Flying Toilet injection on an Indy 400-3 (Dominator flange) intake for the last 2 seasons (2009 and 2010).


1993 Daytona, 5.50 at 130mph (1/8) 1.19 sixty ft (PG). Link to 572 B1 - Part 1
Re: mechanical injection ? [Re: 440Jim] #833699
10/22/10 05:33 AM
10/22/10 05:33 AM
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ontario canada
mac56 Offline OP
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Quote:

I have been running that Ron's Flying Toilet injection on an Indy 400-3 (Dominator flange) intake for the last 2 seasons (2009 and 2010).



Did you find a noticeable difference when you switched from a carburetor?

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