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offshores
Samba Member
Joined: February 08, 2012
Posts: 1085
Location: So Cal
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 Posted: Mon Feb 16, 2015 3:22 pm Post subject: Dual IDF 44's on a 1776 & Need Smaller Carbs |
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I want/need to drop down to some dual 40's and saw this ad in the classifieds. Could anyone let me know if this is a good option?
http://www.thesamba.com/vw/classifieds/detail.php?id=1700208
They'll be replacing a set of Spanish Weber IDF 44's that are currently on a 1776. The plan would be to unbolt my carbs and hook these up using my current manifolds, linkage, air cleaners, etc...
Thanks |
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Derek Cobb
Annoying
Joined: March 11, 2004
Posts: 2565
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| Posted: Mon Feb 16, 2015 3:41 pm Post subject: |
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| The carburetors should fit the manifolds you have already, but maybe you could just get some smaller venturi's for your 44's. |
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offshores
Samba Member
Joined: February 08, 2012
Posts: 1085
Location: So Cal
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| Posted: Mon Feb 16, 2015 4:23 pm Post subject: |
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| From what I've read that doesn't seem like a good option. Even people running 1835's were told to get 40's and not even bother trying to rejet 44's on a smaller engine. |
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Dan Ruddock
Samba Member
Joined: October 25, 2012
Posts: 3594
Location: Sarasota, in my adopted state of Florida
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| Posted: Mon Feb 16, 2015 4:54 pm Post subject: |
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| offshores wrote: |
| From what I've read that doesn't seem like a good option. Even people running 1835's were told to get 40's and not even bother trying to rejet 44's on a smaller engine. |
That is nonsense, The heads, cam and exhaust have more say about what carbs to use than displacement.
I have built 1776 engines that ran fantastic with 44's.
Dan |
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Todd66
Samba Member
Joined: February 19, 2012
Posts: 461
Location: Utah
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| Posted: Mon Feb 16, 2015 5:06 pm Post subject: |
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| If you want to go the 40 route I would install some Empi HMPX's. Carcraft usually has a good deal going. Just get the deluxe ones with the aluminum air cleaners. I am not saying you can't get the 44's to work, but I would imagine smaller venturis would help the lower RPM throttle response. |
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Mad Manx
Samba Member
Joined: September 30, 2004
Posts: 304
Location: Redondo Beach California
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| Posted: Mon Feb 16, 2015 5:27 pm Post subject: |
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| Dan Ruddock wrote: |
| offshores wrote: |
| From what I've read that doesn't seem like a good option. Even people running 1835's were told to get 40's and not even bother trying to rejet 44's on a smaller engine. |
That is nonsense, The heads, cam and exhaust have more say about what carbs to use than displacement.
I have built 1776 engines that ran fantastic with 44's.
Dan |
X2 You can get 44's to run well on a 1776 with the smaller vents and jetting.  |
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MURZI
Samba Member
Joined: August 25, 2005
Posts: 5063
Location: Madisonville, La
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| Posted: Mon Feb 16, 2015 5:32 pm Post subject: |
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Out the box jetting on 40s will run like crap on a 1776 too. Jet those 44's 52/145/190 and let it be. It'll run fine.
_________________
62 vert
2276
Tim’s welded heads
45 Dells
A1 sidewinder
Fk44 cam |
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vwracerdave
Samba Member
Joined: November 11, 2004
Posts: 15309
Location: Deep in the 405
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| Posted: Mon Feb 16, 2015 6:22 pm Post subject: |
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44 IDF's with 28mm venturies will never run the same as 40 IDF's with 28mm venturies.
_________________
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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Bajaman65
Samba Member
Joined: January 16, 2007
Posts: 469
Location: Borrego Springs
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| Posted: Mon Feb 16, 2015 6:37 pm Post subject: |
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| vwracerdave wrote: |
| 44 IDF's with 28mm venturies will never run the same as 40 IDF's with 28mm venturies. |
Who said anything about 44's with 28 vents? I would run 32 -34 vents on those 44's |
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Dan Ruddock
Samba Member
Joined: October 25, 2012
Posts: 3594
Location: Sarasota, in my adopted state of Florida
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| Posted: Mon Feb 16, 2015 7:13 pm Post subject: |
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| Bajaman65 wrote: |
| vwracerdave wrote: |
| 44 IDF's with 28mm venturies will never run the same as 40 IDF's with 28mm venturies. |
Who said anything about 44's with 28 vents? I would run 32 -34 vents on those 44's |
On the 1776 I built I ran 36 vents and had very good responce. Dan |
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MURZI
Samba Member
Joined: August 25, 2005
Posts: 5063
Location: Madisonville, La
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| Posted: Mon Feb 16, 2015 8:09 pm Post subject: |
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I have shoved my 44's on many engines in this range, 1776, 1835, 1850....runs great. Heck my 1835 had stock 35mm valves with 36 vents. Ran like a scalded dog. No hesitation.
I have seen many people swap 40's for 44's or vice versa because they couldn't find that right "bolt on and go set". Newsflash.... I don't think you will find that set.
_________________
62 vert
2276
Tim’s welded heads
45 Dells
A1 sidewinder
Fk44 cam |
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offshores
Samba Member
Joined: February 08, 2012
Posts: 1085
Location: So Cal
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| Posted: Mon Feb 16, 2015 8:28 pm Post subject: |
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Wow! These responses are pretty much opposite of what I’ve been reading lately. Go figure. The reference I used up above about an 1835 was one of many threads I read on here and I specifically recall a post in that thread.
http://www.thesamba.com/vw/forum/viewtopic.php?t=4...mp;start=0
| MURZI wrote: |
| If you just swap them for 40IDF's that engine will COME ALIVE. The difference will be amazing. The carbs are simply too big for that engine. A set of 40's with 28 venturies are the ticket. |
And today:
| MURZI wrote: |
| Out the box jetting on 40s will run like crap on a 1776 too. Jet those 44's 52/145/190 and let it be. It'll run fine. |
No biggy, opinions change over a 4.5 years and that’s cool, but it gets confusing.
I’ve yet to find out what vents I have, but I just checked these:
60 idle
135 main
175 air
F11 et |
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[email protected]
Samba Member
Joined: August 03, 2002
Posts: 12785
Location: Salt Lake City, Utah
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| Posted: Mon Feb 16, 2015 9:11 pm Post subject: |
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Everyone has an opinion on the Interweb. And guess what, there is both good and bad information floating around out there. Discernment is key.
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MURZI
Samba Member
Joined: August 25, 2005
Posts: 5063
Location: Madisonville, La
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| Posted: Mon Feb 16, 2015 9:12 pm Post subject: |
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I can see how you would be confused. If I recall the OP and I had a few PM exchanges and his car had basically a stock engine with 92 Pistons......
Hope you find your answer.... Just trying to save you some grief ....and money.
_________________
62 vert
2276
Tim’s welded heads
45 Dells
A1 sidewinder
Fk44 cam |
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mark tucker
Samba Member
Joined: April 08, 2009
Posts: 23937
Location: SHALIMAR ,FLORIDA
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| Posted: Mon Feb 16, 2015 9:32 pm Post subject: |
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| from what Ive seen and expearanced it mostly the guy tuning it.I would however go down to 30 or 32 vents&rejet unless your after the most topend.my 44's worked great on my 1874. |
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Bajaman65
Samba Member
Joined: January 16, 2007
Posts: 469
Location: Borrego Springs
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| Posted: Mon Feb 16, 2015 11:53 pm Post subject: |
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| [email protected] wrote: |
| Everyone has an opinion on the Interweb. And guess what, there is both good and bad information floating around out there. Discernment is key. |
I have been Slammed for an idea one minute a Praised the next, you have to decide who to believe - opinions are like A - Holes, they all spew shit. |
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vwracerdave
Samba Member
Joined: November 11, 2004
Posts: 15309
Location: Deep in the 405
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| Posted: Tue Feb 17, 2015 5:54 am Post subject: |
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without more engine details cam, heads, CP, exhaust, etc then all of us are just guessing what will work. 44 IDF's can be way too big for some 1776-1835 engines and be just the right size for others. It all depends on the entire combo.
_________________
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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offshores
Samba Member
Joined: February 08, 2012
Posts: 1085
Location: So Cal
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| Posted: Tue Feb 17, 2015 7:32 am Post subject: |
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I don’t currently have many details on the engine, but maybe some of this will help???
I purchased the Bus about 3 weeks ago and the PO had it at a shop 8/16/14. The receipts show new dual port heads w/ HD springs for $420. For that price of 2 heads I highly doubt they’re high performance. .009 dist w/ elec ignition, 1 ¼” j tubes w/ Empi header and quite pack. I currently have a Vintage Speed Sport muffler on order. I did a compression test on Sat and got an avg 120 PSI at all 4 cylinders. That’s what I know at this point. I could call the shop that did the heads later today to see if they have exact specs.
Thanks for all the responses |
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Bashr52
Samba Member
Joined: July 16, 2006
Posts: 5666
Location: On an island in VA
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| Posted: Tue Feb 17, 2015 10:19 am Post subject: |
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I'll trade you for a set of 36 DRLA's. Problem solved  |
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rs58rag
Samba Member
Joined: August 22, 2010
Posts: 419
Location: riverside,ca
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| Posted: Tue Feb 17, 2015 12:54 pm Post subject: |
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| Ran 44 idfs on a 1776 that had stock heads on a daily driver... ran awesome. This was back in late 1980s. I had the carbs set up and dialed in at Car Craft back then. |
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