I picked up this wedge plate from Amazon. It approximates a level intake and increases plenum volume a bit. https://www.amazon.com/dp/B000CON2AO?ref_=ppx_hzsearch_conn_dt_b_fed_asin_ti... I moved to TBI, but retained it to help with deck lid clearance. Brian On Thu, Jun 26, 2025 at 5:35 AM Rich Hoppe <richbhoppe@gmail.com> wrote:
You can machine the top of intake flat so that the carb is not tilted. Rich Sent from my iPhone
On Jun 25, 2025, at 8:09 PM, Mike Drew via DeTomaso < detomaso@detomasolist.com> wrote:
George,
You are manufacturing a solution to a problem that doesn’t exist and then creating huge problems.
Yes you can flip a Holley around backwards, as long as the intake will accommodate it. Some carbs have smaller primary butterflies but most Holleys do not. So MOST intakeS either have four equal holes, or a single opening.
But for the sake of argument, let’s say you flip your carb around and have a shorter fuel line as a result.
Hooray.
But now your PCV inlet to the carb fouls the distributor, your electric choke is on the wrong side so the wire won’t reach, and most significantly, there is no way to hook up the throttle cable!
From new the Pantera had the tank on the left and carb inlet on the right. It’s never been a problem.
It’s an interesting thought though!
Mike
Sent from my iPad
On Jun 25, 2025, at 17:29, George Sekula <georgesekula@outlook.com> wrote:
Sorry for jumping in. I wish the fuel feed on a Holley 4150 was on the same side as the Pantera fuel tank and contemplated mounting the carburetor backwards. But I am not sure if the vents, metering block, and power valve would still work correctly. Thoughts? __________________________________________________________________
From: Garth Rodericks via DeTomaso <detomaso@detomasolist.com> Sent: Wednesday, June 25, 2025 7:48 PM To: detomaso@detomasolist.com <detomaso@detomasolist.com>; Ben Roper <ben_roper@yahoo.com> Subject: [DeTomaso] Re: New Member - engine dies under hard braking
Install a one-piece vent tube. This will prevent fuel from flowing out your vent tube and flooding the carb. Instead, it will flow to the front bowl under hard braking. I had the same problem and made my own vent tube for my Pantera. See examples in these threads... [1] https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww .vintage-mustang.com %2Fposts%2F10877511%2F&data=05%7C02%7C%7C1c0719e724 e74b239b2c08ddb442c7e5%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C638 864921124397206%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiI wLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C %7C&sdata=aua3g9O5jZkIeWvp5vlm0ppHFO1zGE4RvV7oOBiEA3c%3D&reserved=0 It's a popular mod for the off-road/Bronco crowd too. [2] https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fcla ssicbroncos.com %2Fcarb_tricks.shtml&data=05%7C02%7C%7C1c0719e724e74b239 b2c08ddb442c7e5%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C6388649211 24423009%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMD AwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sda ta=iHxTFPu0FVFu0wdpk%2FBrzMNRD5KZ0aBN%2F1D%2BB%2FOqxKo%3D&reserved=0 Or, order one. [3] https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww .ebay.com %2Fitm%2F192886524715&data=05%7C02%7C%7C1c0719e724e74b239b2c08 ddb442c7e5%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C638864921124439 281%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCI sIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=%2 BubMNb9oHkNm%2Fa3PRhIFlnjqpufm7slXWQeZoMHzPJE%3D&reserved=0 [4] https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww .figspeed.com %2Fcarburetors-accessories%2Faccessories%2Fvent-tube-off-r oad-and-marine-4150-4160.html&data=05%7C02%7C%7C1c0719e724e74b239b2c08d db442c7e5%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C6388649211244531 50%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIs IlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=P2l %2ByxuC98PEWDPpEsoOE6MmY%2BMgkgy%2BX5e8HZPcJzo%3D&reserved=0
On that note, I am having a very strange issue with hard braking. If I stab the brakes hard, the car will idle way down and even die. I did a vacuum leak test around the carb and intake manifold yesterday and didn’t find anything. However the car is equipped with an auxiliary vacuum pump on the booster so vacuum shouldn’t (?) be an issue. The carb floats are set center line, but I have a hunch I still need to lower the rear float despite the carb having whistle vent tubes it seems like fuel is flooding into the butterfly’s. I have read some posts by Asa regarding the carb being a real pain in the ass to tune, and the cam not hardly making any vacuum which are most likely contributing factors. But my hunch is that fuel is sloshing. What can I do to mitigate or test this?
References
1. https://www.vintage-mustang.com/posts/10877511/ 2. https://classicbroncos.com/carb_tricks.shtml 3. https://www.ebay.com/itm/192886524715 4. https://www.figspeed.com/carburetors-accessories/accessories/vent-tube-off-r...
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I picked up this wedge plate from Amazon. It approximates a level intake and increases plenum volume a bit. [1]https://www.amazon.com/dp/B000CON2AO?ref_=ppx_hzsearch_conn_dt_b_fed _asin_title_22 I moved to TBI, but retained it to help with deck lid clearance. Brian On Thu, Jun 26, 2025 at 5:35 AM Rich Hoppe <[2]richbhoppe@gmail.com> wrote: You can machine the top of intake flat so that the carb is not tilted. Rich Sent from my iPhone > On Jun 25, 2025, at 8:09 PM, Mike Drew via DeTomaso <[3]detomaso@detomasolist.com> wrote: > > George, > > You are manufacturing a solution to a problem that doesn’t exist and then creating huge problems. > > Yes you can flip a Holley around backwards, as long as the intake will accommodate it. Some carbs have smaller primary butterflies but most Holleys do not. So MOST intakeS either have four equal holes, or a single opening. > > But for the sake of argument, let’s say you flip your carb around and have a shorter fuel line as a result. > > Hooray. > > But now your PCV inlet to the carb fouls the distributor, your electric choke is on the wrong side so the wire won’t reach, and most significantly, there is no way to hook up the throttle cable! > > From new the Pantera had the tank on the left and carb inlet on the right. It’s never been a problem. > > It’s an interesting thought though! > > Mike > > > > Sent from my iPad > >> On Jun 25, 2025, at 17:29, George Sekula <[4]georgesekula@outlook.com> wrote: >> >> Sorry for jumping in. I wish the fuel feed on a Holley 4150 was on the >> same side as the Pantera fuel tank and contemplated mounting the >> carburetor backwards. But I am not sure if the vents, metering block, >> and power valve would still work correctly. Thoughts? >> __________________________________________________________________ >> >> From: Garth Rodericks via DeTomaso <[5]detomaso@detomasolist.com> >> Sent: Wednesday, June 25, 2025 7:48 PM >> To: [6]detomaso@detomasolist.com <[7]detomaso@detomasolist.com>; Ben Roper >> <[8]ben_roper@yahoo.com> >> Subject: [DeTomaso] Re: New Member - engine dies under hard braking >> >> Install a one-piece vent tube. This will prevent fuel from flowing out >> your vent tube and flooding the carb. Instead, it will flow to the >> front bowl under hard braking. >> I had the same problem and made my own vent tube for my Pantera. See >> examples in these threads... >> [1][9]https://na01.safelinks.protection.outlook.com/?url=https%3A%2F %2Fwww >> .[10]vintage-mustang.com%2Fposts%2F10877511%2F&data=05%7C02%7C%7C1c0 719e724 >> e74b239b2c08ddb442c7e5%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C 638 >> 864921124397206%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYi OiI >> wLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C %7C >> %7C&sdata=aua3g9O5jZkIeWvp5vlm0ppHFO1zGE4RvV7oOBiEA3c%3D&reserved=0 >> It's a popular mod for the off-road/Bronco crowd too. >> [2][11]https://na01.safelinks.protection.outlook.com/?url=https%3A%2 F%2Fcla >> [12]ssicbroncos.com%2Fcarb_tricks.shtml&data=05%7C02%7C%7C1c0719e724 e74b239 >> b2c08ddb442c7e5%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C6388649 211 >> 24423009%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjA uMD >> AwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C& sda >> ta=iHxTFPu0FVFu0wdpk%2FBrzMNRD5KZ0aBN%2F1D%2BB%2FOqxKo%3D&reserved=0 >> Or, order one. >> [3][13]https://na01.safelinks.protection.outlook.com/?url=https%3A%2 F%2Fwww >> .[14]ebay.com%2Fitm%2F192886524715&data=05%7C02%7C%7C1c0719e724e74b2 39b2c08 >> ddb442c7e5%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C638864921124 439 >> 281%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAw MCI >> sIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata =%2 >> BubMNb9oHkNm%2Fa3PRhIFlnjqpufm7slXWQeZoMHzPJE%3D&reserved=0 >> [4][15]https://na01.safelinks.protection.outlook.com/?url=https%3A%2 F%2Fwww >> .[16]figspeed.com%2Fcarburetors-accessories%2Faccessories%2Fvent-tub e-off-r >> oad-and-marine-4150-4160.html&data=05%7C02%7C%7C1c0719e724e74b239b2c 08d >> db442c7e5%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C6388649211244 531 >> 50%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwM CIs >> IlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata= P2l >> %2ByxuC98PEWDPpEsoOE6MmY%2BMgkgy%2BX5e8HZPcJzo%3D&reserved=0 >> >> On that note, I am having a very strange issue with hard braking. If I >> stab the brakes hard, the car will idle way down and even die. I did a >> vacuum leak test around the carb and intake manifold yesterday and >> didn’t find anything. However the car is equipped with an auxiliary >> vacuum pump on the booster so vacuum shouldn’t (?) be an issue. The >> carb floats are set center line, but I have a hunch I still need to >> lower the rear float despite the carb having whistle vent tubes it >> seems like fuel is flooding into the butterfly’s. I have read some >> posts by Asa regarding the carb being a real pain in the ass to tune, >> and the cam not hardly making any vacuum which are most likely >> contributing factors. But my hunch is that fuel is sloshing. What can I >> do to mitigate or test this? >> >> References >> >> 1. [17]https://www.vintage-mustang.com/posts/10877511/ >> 2. [18]https://classicbroncos.com/carb_tricks.shtml >> 3. [19]https://www.ebay.com/itm/192886524715 >> 4. [20]https://www.figspeed.com/carburetors-accessories/accessories/ven t-tube-off-road-and-marine-4150-4160.html >> >> Detomaso Email List is not managed by POCA >> Posted emails must not exceed 1.5 Megabytes >> DeTomaso mailing list >> [21]DeTomaso@server.detomasolist.com >> [22]http://server.detomasolist.com/mailman/listinfo/detomaso >> >> To manage your subscription (change email address, unsubscribe, etc.) use the links above. >> >> Members who post to this list grant license to the list to forward any message posted here to all past, current, or future members of the list. They also grant the list owner permission to maintain an archive or approve the archiving of list messages. > > > Detomaso Email List is not managed by POCA > Posted emails must not exceed 1.5 Megabytes > DeTomaso mailing list > [23]DeTomaso@server.detomasolist.com > [24]http://server.detomasolist.com/mailman/listinfo/detomaso > > To manage your subscription (change email address, unsubscribe, etc.) use the links above. > > Members who post to this list grant license to the list to forward any message posted here to all past, current, or future members of the list. They also grant the list owner permission to maintain an archive or approve the archiving of list messages. Detomaso Email List is not managed by POCA Posted emails must not exceed 1.5 Megabytes DeTomaso mailing list [25]DeTomaso@server.detomasolist.com [26]http://server.detomasolist.com/mailman/listinfo/detomaso To manage your subscription (change email address, unsubscribe, etc.) use the links above. Members who post to this list grant license to the list to forward any message posted here to all past, current, or future members of the list. They also grant the list owner permission to maintain an archive or approve the archiving of list messages. References 1. https://www.amazon.com/dp/B000CON2AO?ref_=ppx_hzsearch_conn_dt_b_fed_asin_ti... 2. mailto:richbhoppe@gmail.com 3. mailto:detomaso@detomasolist.com 4. mailto:georgesekula@outlook.com 5. mailto:detomaso@detomasolist.com 6. mailto:detomaso@detomasolist.com 7. mailto:detomaso@detomasolist.com 8. mailto:ben_roper@yahoo.com 9. https://na01.safelinks.protection.outlook.com/?url=https://www 10. http://vintage-mustang.com/ 11. https://na01.safelinks.protection.outlook.com/?url=https://cla 12. http://ssicbroncos.com/ 13. https://na01.safelinks.protection.outlook.com/?url=https://www 14. http://ebay.com/ 15. https://na01.safelinks.protection.outlook.com/?url=https://www 16. http://figspeed.com/ 17. https://www.vintage-mustang.com/posts/10877511/ 18. https://classicbroncos.com/carb_tricks.shtml 19. https://www.ebay.com/itm/192886524715 20. https://www.figspeed.com/carburetors-accessories/accessories/vent-tube-off-r... 21. mailto:DeTomaso@server.detomasolist.com 22. http://server.detomasolist.com/mailman/listinfo/detomaso 23. mailto:DeTomaso@server.detomasolist.com 24. http://server.detomasolist.com/mailman/listinfo/detomaso 25. mailto:DeTomaso@server.detomasolist.com 26. http://server.detomasolist.com/mailman/listinfo/detomaso