SB Tunnel Ram tunning
#2368713
09/11/17 10:40 AM
09/11/17 10:40 AM
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Joined: Oct 2015
Posts: 192 Gravataí, RS, Brazil
360tripleblack77
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Joined: Oct 2015
Posts: 192
Gravataí, RS, Brazil
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Hi,
I dicided move forward from Super Victor Intake to Tunnel Ram. My engine is a 360" with 12.0:1 CR, Voodoo Flat Tapped cam, Eddy Ported Heads flowed 301cfm@.600". I was running with a Super Victor Intake + Mighty Demon 750 Carb. Now I'm planning use two Mighty Demons 750 on Tunnel Ram.
I never had tunning a tunnel ram so far and I would like some advices like jets to start and use or do not use power valve on the carb?
Thanks
'77 Brazilian Dodge Charger R/T - Street Car Footbrake, Pump Gas, SB Mopar 360" N/A 3300lbs, Leaf Spring + Assassin Bars Best 1/8 mile ET 1.50 60' / 4.31 330' / 6.73@102.54mph
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Re: SB Tunnel Ram tunning
[Re: 360tripleblack77]
#2368834
09/11/17 02:41 PM
09/11/17 02:41 PM
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Joined: Aug 2003
Posts: 43,161 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,161
Bend,OR USA
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Tune the idle circuits first, all eight of them I would use the power valves for part throttle cruising Make sure your fuel system will keep the carbs. full of fuel at WOT If you can't jet the carbs up enough(richer) to slow the car down in the 1/4 mile you don't have enough fuel volume As far as adjusting the idle circuits on multiple carbs. I have had to screw them in from 1/4 to 1/2 turn out from bottomed to get the idle circuits lean enough to not foul the plugs All the rest is basic carb tuning, squirters, primary and secondary jetting, needle and seat size needed and all the rest Have fun, let us know how it goes
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: SB Tunnel Ram tunning
[Re: 360tripleblack77]
#2368875
09/11/17 03:50 PM
09/11/17 03:50 PM
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Joined: Jul 2004
Posts: 19,317 State of confusion
Thumperdart
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I Live Here
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Post all of the specs as in jets, ifr's, idle bleeds, high bleeds,amount of emulsion holes and the sizes timing etc. then we can help ya out...............
Last edited by Thumperdart; 09/11/17 03:57 PM.
72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
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Re: SB Tunnel Ram tunning
[Re: Thumperdart]
#2368936
09/11/17 05:54 PM
09/11/17 05:54 PM
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Joined: Oct 2015
Posts: 192 Gravataí, RS, Brazil
360tripleblack77
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Thanks Dom,
Carb is a Mighty Demon 750 with annular boosters. About the Jets, I'm planning start with 72 in primary and 84 in secundary.
SQUIRTER: 0.031 IFR: 0.038 IDLE AIR BLEEDS: 0.070 HIGH BLEDS: 0.033 EMULSION HOLES: 3 EMULSION HOLE DIAM: 0.031
'77 Brazilian Dodge Charger R/T - Street Car Footbrake, Pump Gas, SB Mopar 360" N/A 3300lbs, Leaf Spring + Assassin Bars Best 1/8 mile ET 1.50 60' / 4.31 330' / 6.73@102.54mph
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Re: SB Tunnel Ram tunning
[Re: Cab_Burge]
#2368941
09/11/17 06:05 PM
09/11/17 06:05 PM
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Joined: Oct 2015
Posts: 192 Gravataí, RS, Brazil
360tripleblack77
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Thank you Mr. Carb! I think that will have a lot of work to tunning correctly multiple carbs but will be very fun. My fuel pump is Holley Blue and I tested this pump some weeks ago and they flowed 124 GPH of free flow... With single carb, I had no issues so far. Do you think that I could have any issues running with multiple carbs? For sure. I will keep everyone knows about improvements.
'77 Brazilian Dodge Charger R/T - Street Car Footbrake, Pump Gas, SB Mopar 360" N/A 3300lbs, Leaf Spring + Assassin Bars Best 1/8 mile ET 1.50 60' / 4.31 330' / 6.73@102.54mph
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Re: SB Tunnel Ram tunning
[Re: 360tripleblack77]
#2368950
09/11/17 06:22 PM
09/11/17 06:22 PM
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Joined: Jul 2004
Posts: 19,317 State of confusion
Thumperdart
I Live Here
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I Live Here
Joined: Jul 2004
Posts: 19,317
State of confusion
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Thanks Dom,
Carb is a Mighty Demon 750 with annular boosters. About the Jets, I'm planning start with 72 in primary and 84 in secundary.
SQUIRTER: 0.031 IFR: 0.038 IDLE AIR BLEEDS: 0.070 HIGH BLEDS: 0.033 EMULSION HOLES: 3 EMULSION HOLE DIAM: 0.031 The last 750 t-rams I did ended up as follows but your tune may vary; jets 72-83 idle bleeds .068 high bleeds .029 kills .027 pvcr's .061 ifr's .031 lowered t-slots .085 squirters .028-.031 pink cams angle channels .140 needle n seats.120 6 psi max emulsion .026 in #1 and #3 middle plugged very little t-slot exposed on primary and secondary otherwise wouldn't idle but less is sometimes better........ Hope this helps you out.......... I'd get a better fuel pump if it was me............ Mind you these were down leg boosters and you MAY need less jet.........Get a wide band if you don't have one already and tuning will come way faster.........
Last edited by Thumperdart; 09/11/17 07:42 PM.
72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
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Re: SB Tunnel Ram tunning
[Re: 360tripleblack77]
#2369047
09/11/17 09:51 PM
09/11/17 09:51 PM
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Joined: Aug 2003
Posts: 43,161 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,161
Bend,OR USA
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Start out by driving it on the street, if it is street and strip car, at light part throttle for your normal street driving distance and type (except WOT ) Pull all 8 plugs out and look at each one real hard with a good magnafeir Go from there on the primary jetting Don't be surprised if you end up with 3 or 4 different jet sizes in the primary Tunnel ram intakes are very tunable One barrel per cylinder at WOT
Last edited by Cab_Burge; 09/11/17 09:52 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: SB Tunnel Ram tunning
[Re: 360tripleblack77]
#2369284
09/12/17 10:14 AM
09/12/17 10:14 AM
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Joined: Jan 2003
Posts: 2,916 A shed in England
Tig
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master
Joined: Jan 2003
Posts: 2,916
A shed in England
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If your car leaves well and your carbs are mounted sideways, you may require j tubes and wedged floats. HTH's
'74 Challenger..9.46 @ 145.9 1/4, 6.001 @ 118 1/8 so far. 4023lb !!! # N/A, Marsh performance 655ci, Indy Maxx, T/R, Indy 600-13 X's, Street legal, pump gas, full interior, Cal-Tracs, mufflers, 3:73's and real 10.5 radials. 9.51 @ 142.4 1/4, 6.003 @ 114 1/8 with our old mule KB, 572-13, 580 wedge. RHD '68 Barracuda Fastback 323ci street/strip. Best ET 13.88 @ 99.03
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Re: SB Tunnel Ram tunning
[Re: Thumperdart]
#2369286
09/12/17 10:28 AM
09/12/17 10:28 AM
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Joined: Oct 2015
Posts: 192 Gravataí, RS, Brazil
360tripleblack77
OP
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OP
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Joined: Oct 2015
Posts: 192
Gravataí, RS, Brazil
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Thanks Dom,
Carb is a Mighty Demon 750 with annular boosters. About the Jets, I'm planning start with 72 in primary and 84 in secundary.
SQUIRTER: 0.031 IFR: 0.038 IDLE AIR BLEEDS: 0.070 HIGH BLEDS: 0.033 EMULSION HOLES: 3 EMULSION HOLE DIAM: 0.031 The last 750 t-rams I did ended up as follows but your tune may vary; jets 72-83 idle bleeds .068 high bleeds .029 kills .027 pvcr's .061 ifr's .031 lowered t-slots .085 squirters .028-.031 pink cams angle channels .140 needle n seats.120 6 psi max emulsion .026 in #1 and #3 middle plugged very little t-slot exposed on primary and secondary otherwise wouldn't idle but less is sometimes better........ Hope this helps you out.......... I'd get a better fuel pump if it was me............ Mind you these were down leg boosters and you MAY need less jet.........Get a wide band if you don't have one already and tuning will come way faster......... Dom, I really appreciate all your knowledge that you shared with me. Thank you! I still need buy some parts to fine tune on carbs like bleeds, squirters and needles... But I will do.. About wide band , yes I've one with datalogger, amazing resource!
'77 Brazilian Dodge Charger R/T - Street Car Footbrake, Pump Gas, SB Mopar 360" N/A 3300lbs, Leaf Spring + Assassin Bars Best 1/8 mile ET 1.50 60' / 4.31 330' / 6.73@102.54mph
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Re: SB Tunnel Ram tunning
[Re: 360tripleblack77]
#2369422
09/12/17 02:39 PM
09/12/17 02:39 PM
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Joined: Jul 2004
Posts: 19,317 State of confusion
Thumperdart
I Live Here
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I Live Here
Joined: Jul 2004
Posts: 19,317
State of confusion
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Thanks Dom,
Carb is a Mighty Demon 750 with annular boosters. About the Jets, I'm planning start with 72 in primary and 84 in secundary.
SQUIRTER: 0.031 IFR: 0.038 IDLE AIR BLEEDS: 0.070 HIGH BLEDS: 0.033 EMULSION HOLES: 3 EMULSION HOLE DIAM: 0.031 The last 750 t-rams I did ended up as follows but your tune may vary; jets 72-83 idle bleeds .068 high bleeds .029 kills .027 pvcr's .061 ifr's .031 lowered t-slots .085 squirters .028-.031 pink cams angle channels .140 needle n seats.120 6 psi max emulsion .026 in #1 and #3 middle plugged very little t-slot exposed on primary and secondary otherwise wouldn't idle but less is sometimes better........ Hope this helps you out.......... I'd get a better fuel pump if it was me............ Mind you these were down leg boosters and you MAY need less jet.........Get a wide band if you don't have one already and tuning will come way faster......... Dom, I really appreciate all your knowledge that you shared with me. Thank you! I still need buy some parts to fine tune on carbs like bleeds, squirters and needles... But I will do.. About wide band , yes I've one with datalogger, amazing resource! Anytime and v floats will help a lot........
72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
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Re: SB Tunnel Ram tunning
[Re: Thumperdart]
#2369492
09/12/17 04:26 PM
09/12/17 04:26 PM
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Joined: Oct 2015
Posts: 192 Gravataí, RS, Brazil
360tripleblack77
OP
member
|
OP
member
Joined: Oct 2015
Posts: 192
Gravataí, RS, Brazil
|
Thanks Dom,
Carb is a Mighty Demon 750 with annular boosters. About the Jets, I'm planning start with 72 in primary and 84 in secundary.
SQUIRTER: 0.031 IFR: 0.038 IDLE AIR BLEEDS: 0.070 HIGH BLEDS: 0.033 EMULSION HOLES: 3 EMULSION HOLE DIAM: 0.031 The last 750 t-rams I did ended up as follows but your tune may vary; jets 72-83 idle bleeds .068 high bleeds .029 kills .027 pvcr's .061 ifr's .031 lowered t-slots .085 squirters .028-.031 pink cams angle channels .140 needle n seats.120 6 psi max emulsion .026 in #1 and #3 middle plugged very little t-slot exposed on primary and secondary otherwise wouldn't idle but less is sometimes better........ Hope this helps you out.......... I'd get a better fuel pump if it was me............ Mind you these were down leg boosters and you MAY need less jet.........Get a wide band if you don't have one already and tuning will come way faster......... Dom, I really appreciate all your knowledge that you shared with me. Thank you! I still need buy some parts to fine tune on carbs like bleeds, squirters and needles... But I will do.. About wide band , yes I've one with datalogger, amazing resource! Anytime and v floats will help a lot........ I forgot to tell you one important thing about fuel. Here in Brazil we've around 30% of ethanol in gasoline. This percentage of ethanol could change some configurations that you sent me ok?
'77 Brazilian Dodge Charger R/T - Street Car Footbrake, Pump Gas, SB Mopar 360" N/A 3300lbs, Leaf Spring + Assassin Bars Best 1/8 mile ET 1.50 60' / 4.31 330' / 6.73@102.54mph
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Re: SB Tunnel Ram tunning (update)
[Re: Thumperdart]
#2418907
12/15/17 10:49 AM
12/15/17 10:49 AM
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Joined: Oct 2015
Posts: 192 Gravataí, RS, Brazil
360tripleblack77
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OP
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Joined: Oct 2015
Posts: 192
Gravataí, RS, Brazil
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Hi Folks...
I'm almost there adjusting my Tunnel Ram setup...
So Far...
Squirter: 31 Pri and Sec Jets: 74 pri, 80 sec Cam Pink IFR: 0.038 Air Bleeds: 0.070 High Bleeds: 0.033
Still little poor when I get WOT, maybe small squirter?
'77 Brazilian Dodge Charger R/T - Street Car Footbrake, Pump Gas, SB Mopar 360" N/A 3300lbs, Leaf Spring + Assassin Bars Best 1/8 mile ET 1.50 60' / 4.31 330' / 6.73@102.54mph
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Re: SB Tunnel Ram tunning (update)
[Re: 360tripleblack77]
#2418939
12/15/17 12:38 PM
12/15/17 12:38 PM
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Joined: Oct 2011
Posts: 3,036 bean town ....Ca
WHITEDART
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master
Joined: Oct 2011
Posts: 3,036
bean town ....Ca
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Hi Folks...
I'm almost there adjusting my Tunnel Ram setup...
So Far...
Squirter: 31 Pri and Sec Jets: 74 pri, 80 sec Cam Pink IFR: 0.038 Air Bleeds: 0.070 High Bleeds: 0.033
Still little poor when I get WOT, maybe small squirter?
when do you expect to take it to the track again.. what would be atypical air density for you guys corrected of course..
In the 8s N/A.with Brett miller W8's 5.07 at 133 at 2700lb
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Re: SB Tunnel Ram tunning (update)
[Re: WHITEDART]
#2418988
12/15/17 02:13 PM
12/15/17 02:13 PM
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Joined: Oct 2015
Posts: 192 Gravataí, RS, Brazil
360tripleblack77
OP
member
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OP
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Joined: Oct 2015
Posts: 192
Gravataí, RS, Brazil
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This weekend! I made some changes in my suspension setup to try eliminate bouncing on the start and also I moved from Super Victor to Tunnel Ram. Last night I tested the car on the street and looks great. Looking for something under 6.98 in 1/8. About the air density. last time that I ran was 1.1467 kg/m3
'77 Brazilian Dodge Charger R/T - Street Car Footbrake, Pump Gas, SB Mopar 360" N/A 3300lbs, Leaf Spring + Assassin Bars Best 1/8 mile ET 1.50 60' / 4.31 330' / 6.73@102.54mph
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Re: SB Tunnel Ram tunning
[Re: 360tripleblack77]
#2419393
12/16/17 09:04 AM
12/16/17 09:04 AM
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Joined: Jan 2003
Posts: 2,916 A shed in England
Tig
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A shed in England
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Looking at the graph this looks like a 3rd gear cruise and then a w/o throttle mash since there are no rpm dips to indicate a shift. (This is assuming we are seeing rpm and a single AFR trace). It looks like you go rich and then lean till you recover onto the jets, this indicates to me that you may pick something up playing with the accelerator pump cams to give a longer squirter duration. I see you use lambda rather than ratio figures too which I'm not used to either.
As a side note, I have my tunnel ram carbs set up with one to one linkages and all square jets with the power valves blanked, this seemed a more logical way of setting them up up but I'm no expert and have only just figured out how to get cleanly off the line.
'74 Challenger..9.46 @ 145.9 1/4, 6.001 @ 118 1/8 so far. 4023lb !!! # N/A, Marsh performance 655ci, Indy Maxx, T/R, Indy 600-13 X's, Street legal, pump gas, full interior, Cal-Tracs, mufflers, 3:73's and real 10.5 radials. 9.51 @ 142.4 1/4, 6.003 @ 114 1/8 with our old mule KB, 572-13, 580 wedge. RHD '68 Barracuda Fastback 323ci street/strip. Best ET 13.88 @ 99.03
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