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raunchy57'
Samba Member
Joined: January 28, 2009
Posts: 32
Location: Puowaina, Oahu
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 Posted: Mon Nov 25, 2019 3:54 pm Post subject: 44'rs..... or 40's. best all around use. |
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Made minor changes to my motor, ( 1968cc), 74mm Forged Crank, 92mm pistons, Mag case sleeved lifter bores, VZ-25 cam, 041 heads 39x35 dual springs, UN-ported, 9:1 comp, Magnum Straight-cuts,.. Not for track use, for weekend cruz, with lots of pounding..!!  . Thanks for everyone's opinions Very Happy |
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Bama Dave
Samba Member
Joined: April 19, 2015
Posts: 963
Location: Alabama
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| Posted: Mon Nov 25, 2019 4:33 pm Post subject: Re: 44'rs..... or 40's. best all around use. |
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I say Weber or Dell 40s...unless you plan on driving at high rpms all the time. Even then, 40s for that size engine. Here comes a bunch of other opinions...
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Casting Timmy
Samba Member
Joined: August 04, 2012
Posts: 1223
Location: Kansas City, Kansas
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| Posted: Mon Nov 25, 2019 4:59 pm Post subject: Re: 44'rs..... or 40's. best all around use. |
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The Dell 40's sound really nice. You could get away with dual weber 40's, but in the end some people run 48 ida's on smaller motors so larger carbs will let it run.
If you plan on bigger motors down the line, do the 44's.
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vwracerdave
Samba Member
Joined: November 11, 2004
Posts: 15601
Location: Deep in the 405
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| Posted: Mon Nov 25, 2019 5:02 pm Post subject: Re: 44'rs..... or 40's. best all around use. |
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36 Dellorto or 40 IDF would work best. Upgrade to larger 30-32mm venturies.
40 Dels or 44 IDF's are too big.
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raunchy57'
Samba Member
Joined: January 28, 2009
Posts: 32
Location: Puowaina, Oahu
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| Posted: Mon Nov 25, 2019 10:18 pm Post subject: Re: 44'rs..... or 40's. best all around use. |
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| vwracerdave wrote: |
36 Dellorto or 40 IDF would work best. Upgrade to larger 30-32mm venturies.
40 Dels or 44 IDF's are too big. |
How about if I slapped in a set of 32mm venturies in a set of 44'rs..? |
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vwracerdave
Samba Member
Joined: November 11, 2004
Posts: 15601
Location: Deep in the 405
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| Posted: Mon Nov 25, 2019 11:58 pm Post subject: Re: 44'rs..... or 40's. best all around use. |
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| raunchy57' wrote: |
| vwracerdave wrote: |
36 Dellorto or 40 IDF would work best. Upgrade to larger 30-32mm venturies.
40 Dels or 44 IDF's are too big. |
How about if I slapped in a set of 32mm venturies in a set of 44'rs..? |
You can get them to work fairly close, but you ask for "BEST".
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2017 Street Comp Champion - Thunder Valley Raceway Park - Noble, OK
2010 Sportsman ET Champion - Mid-America Dragway - Arkansas City, KS
1997 Sportsman ET Champion - Thunder Valley Raceway Park - Noble ,OK |
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mark tucker
Samba Member
Joined: April 08, 2009
Posts: 23950
Location: SHALIMAR ,FLORIDA
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| Posted: Tue Nov 26, 2019 7:35 am Post subject: Re: 44'rs..... or 40's. best all around use. |
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| 40's and port the heads properly for the usage....why waste the $$ to build it or stroke it if the heads wont support it....thats how oh somany engines get blown up and run hot. from trying to make more power than they can flow air. air= hp=tq |
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[email protected]
Samba Member
Joined: August 15, 2002
Posts: 4394
Location: Brew City
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| Posted: Tue Nov 26, 2019 9:55 am Post subject: Re: 44'rs..... or 40's. best all around use. |
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| raunchy57' wrote: |
| Made minor changes to my motor, ( 1968cc), 74mm Forged Crank, 92mm pistons, Mag case sleeved lifter bores, VZ-25 cam, 041 heads 39x35 dual springs, UN-ported, 9:1 comp, Magnum Straight-cuts,.. Not for track use, for weekend cruz, with lots of pounding..!! . Thanks for everyone's opinions Very Happy |
With this combo; your best option is the dual 40 IDF's.
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Dale M.
Samba Member
Joined: April 12, 2006
Posts: 20837
Location: Just a tiny bit west of Yosemite Valley
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| Posted: Tue Nov 26, 2019 10:04 am Post subject: Re: 44'rs..... or 40's. best all around use. |
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I always considered anything under 2000cc to be candidates for 40's (Weber's or HPMX), over 2000cc 44's...
Dale
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All suggestions and advice are purely my own opinion. You are free to ignore them if you wish ... |
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raunchy57'
Samba Member
Joined: January 28, 2009
Posts: 32
Location: Puowaina, Oahu
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| Posted: Tue Nov 26, 2019 11:23 am Post subject: Re: 44'rs..... or 40's. best all around use. |
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| vwracerdave wrote: |
| raunchy57' wrote: |
| vwracerdave wrote: |
36 Dellorto or 40 IDF would work best. Upgrade to larger 30-32mm venturies.
40 Dels or 44 IDF's are too big. |
How about if I slapped in a set of 32mm venturies in a set of 44'rs..? |
You can get them to work fairly close, but you ask for "BEST". |
Got it..!  |
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raunchy57'
Samba Member
Joined: January 28, 2009
Posts: 32
Location: Puowaina, Oahu
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| Posted: Tue Nov 26, 2019 11:25 am Post subject: Re: 44'rs..... or 40's. best all around use. |
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| mark tucker wrote: |
| 40's and port the heads properly for the usage....why waste the $$ to build it or stroke it if the heads wont support it....thats how oh somany engines get blown up and run hot. from trying to make more power than they can flow air. air= hp=tq |
True ... ! Thanks.!! |
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raunchy57'
Samba Member
Joined: January 28, 2009
Posts: 32
Location: Puowaina, Oahu
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| Posted: Tue Nov 26, 2019 11:26 am Post subject: Re: 44'rs..... or 40's. best all around use. |
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| [email protected] wrote: |
| raunchy57' wrote: |
| Made minor changes to my motor, ( 1968cc), 74mm Forged Crank, 92mm pistons, Mag case sleeved lifter bores, VZ-25 cam, 041 heads 39x35 dual springs, UN-ported, 9:1 comp, Magnum Straight-cuts,.. Not for track use, for weekend cruz, with lots of pounding..!! . Thanks for everyone's opinions Very Happy |
With this combo; your best option is the dual 40 IDF's. |
Thanks..!!! |
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raunchy57'
Samba Member
Joined: January 28, 2009
Posts: 32
Location: Puowaina, Oahu
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| Posted: Tue Nov 26, 2019 11:27 am Post subject: Re: 44'rs..... or 40's. best all around use. |
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| Dale M. wrote: |
I always considered anything under 2000cc to be candidates for 40's (Weber's or HPMX), over 2000cc 44's...
Dale |
Thanks..!! |
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raunchy57'
Samba Member
Joined: January 28, 2009
Posts: 32
Location: Puowaina, Oahu
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| Posted: Tue Nov 26, 2019 11:30 am Post subject: Re: 44'rs..... or 40's. best all around use. |
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| Casting Timmy wrote: |
The Dell 40's sound really nice. You could get away with dual weber 40's, but in the end some people run 48 ida's on smaller motors so larger carbs will let it run.
If you plan on bigger motors down the line, do the 44's. |
Thanks..!! |
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raunchy57'
Samba Member
Joined: January 28, 2009
Posts: 32
Location: Puowaina, Oahu
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| Posted: Tue Nov 26, 2019 11:30 am Post subject: Re: 44'rs..... or 40's. best all around use. |
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| Bama Dave wrote: |
| I say Weber or Dell 40s...unless you plan on driving at high rpms all the time. Even then, 40s for that size engine. Here comes a bunch of other opinions... |
Thanks..! |
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raunchy57'
Samba Member
Joined: January 28, 2009
Posts: 32
Location: Puowaina, Oahu
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| Posted: Tue Nov 26, 2019 4:11 pm Post subject: Re: 44'rs..... or 40's. best all around use. |
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| vwracerdave wrote: |
| raunchy57' wrote: |
| vwracerdave wrote: |
36 Dellorto or 40 IDF would work best. Upgrade to larger 30-32mm venturies.
40 Dels or 44 IDF's are too big. |
How about if I slapped in a set of 32mm venturies in a set of 44'rs..? |
You can get them to work fairly close, but you ask for "BEST". |
I'm gonna go with the 40 idf's,... 30 or 32mm venturies?.. for BEST.? ( the stock jets should be alright.? |
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mark tucker
Samba Member
Joined: April 08, 2009
Posts: 23950
Location: SHALIMAR ,FLORIDA
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| Posted: Tue Nov 26, 2019 5:36 pm Post subject: Re: 44'rs..... or 40's. best all around use. |
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| jet it for what it needs. rarely do they come with the correct jetting.always check it along with the plug heat range reading. |
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raunchy57'
Samba Member
Joined: January 28, 2009
Posts: 32
Location: Puowaina, Oahu
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| Posted: Wed Nov 27, 2019 12:25 pm Post subject: Re: 44'rs..... or 40's. best all around use. |
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| Bama Dave wrote: |
| I say Weber or Dell 40s...unless you plan on driving at high rpms all the time. Even then, 40s for that size engine. Here comes a bunch of other opinions... |
good call. tnx. |
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[email protected]
Samba Member
Joined: August 15, 2002
Posts: 4394
Location: Brew City
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| Posted: Wed Nov 27, 2019 12:45 pm Post subject: Re: 44'rs..... or 40's. best all around use. |
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| raunchy57' wrote: |
| vwracerdave wrote: |
| raunchy57' wrote: |
| vwracerdave wrote: |
36 Dellorto or 40 IDF would work best. Upgrade to larger 30-32mm venturies.
40 Dels or 44 IDF's are too big. |
How about if I slapped in a set of 32mm venturies in a set of 44'rs..? |
You can get them to work fairly close, but you ask for "BEST". |
I'm gonna go with the 40 idf's,... 30 or 32mm venturies?.. for BEST.? ( the stock jets should be alright.? |
With your specs, the way it is set up out of the box(assuming you are buying REAL GENUINE webers) is going to be VERY close. I wouldn't change anything until you try and run it.
_________________
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Cylinder Head Reference Sheet |
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raunchy57'
Samba Member
Joined: January 28, 2009
Posts: 32
Location: Puowaina, Oahu
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| Posted: Wed Nov 27, 2019 3:03 pm Post subject: Re: 44'rs..... or 40's. best all around use. |
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| [email protected] wrote: |
| raunchy57' wrote: |
| vwracerdave wrote: |
| raunchy57' wrote: |
| vwracerdave wrote: |
36 Dellorto or 40 IDF would work best. Upgrade to larger 30-32mm venturies.
40 Dels or 44 IDF's are too big. |
How about if I slapped in a set of 32mm venturies in a set of 44'rs..? |
You can get them to work fairly close, but you ask for "BEST". |
I'm gonna go with the 40 idf's,... 30 or 32mm venturies?.. for BEST.? ( the stock jets should be alright.? |
With your specs, the way it is set up out of the box(assuming you are buying REAL GENUINE webers) is going to be VERY close. I wouldn't change anything until you try and run it. |
Alright..! good to hear that., Tnx lots. ( real Weber's ) |
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