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old gh bug Samba Member
Joined: February 22, 2013 Posts: 197 Location: UK
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Posted: Sun Sep 16, 2018 11:34 am Post subject: 2110 with 44 idfs should I change vents as seems sluggish |
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I have 2110 fk8 cam 9:1 cr twin Weber 44 idfs jetting 36 mm vents 200 airs 55 idles 145 mains
Pertronix 2 flamethrower dizzy 30 deg
Berg exhaust
Valves 42 x 35
1:4 rockers
The engine runs very good and no problem at idle or temps and pressure are good.
I just feel it’s not as quick of the mark as it should be low down, but from 4000 rpm it flies .
I have a set of 32mm vents that I could try would these help low down and what jet sizes would be recommended,
I would rather have low down performance than top end.
Any advice will be much appreciated. |
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hobbybob517 Samba Member
Joined: June 02, 2011 Posts: 1194 Location: Netherlands
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Posted: Sun Sep 16, 2018 1:11 pm Post subject: Re: 2110 with 44 idfs should I change vents as seems sluggish |
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Jetting seems on point if you go by math,
Not sure about this but I believe the fk8 likes 10:1 compression,
What is your deck height? _________________ THE BUILD http://www.thesamba.com/vw/forum/viewtopic.php
SBD wrote: |
3 million rpm? Well there's your problem! No wonder it blew up! |
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hobbybob517 Samba Member
Joined: June 02, 2011 Posts: 1194 Location: Netherlands
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Posted: Sun Sep 16, 2018 1:12 pm Post subject: Re: 2110 with 44 idfs should I change vents as seems sluggish |
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You're not running huge tires by any chance? _________________ THE BUILD http://www.thesamba.com/vw/forum/viewtopic.php
SBD wrote: |
3 million rpm? Well there's your problem! No wonder it blew up! |
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RailBoy Samba Member
Joined: March 10, 2008 Posts: 2904 Location: Virginia
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Posted: Sun Sep 16, 2018 2:26 pm Post subject: Re: 2110 with 44 idfs should I change vents as seems sluggish |
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You need to wait for someone to chime on who knows how to picks vent, Redline is a good company to call for an idea.
Thing is there I heard are based on Valve size, I run 34 Vents in my 2180 with DRLA 40's. Yea, some people say there to small a carb for the engine, but this is a street car and still gets around good, just runs out of breath around 5,500 RPMs.. But yes, most like 36 mm vents in a 2180 to get the RPMs, my engine though is a mild build, Engle 120 Cam, 1.1 to 1 ratio rockers, 42x37.5mm valves..
But yea, think vents are based on Valve size to a degree for initial set-up.. This a street car or drag car? RB _________________ [quote="smitty24"]"HELP, I ported my own heads and now have fire coming out my ass" .[/quote]
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old gh bug Samba Member
Joined: February 22, 2013 Posts: 197 Location: UK
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Posted: Sun Sep 16, 2018 2:56 pm Post subject: Re: 2110 with 44 idfs should I change vents as seems sluggish |
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My car is a super beetle cabrio running Porsche 16” wheels with 55 profile tyres |
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RailBoy Samba Member
Joined: March 10, 2008 Posts: 2904 Location: Virginia
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Posted: Sun Sep 16, 2018 2:58 pm Post subject: Re: 2110 with 44 idfs should I change vents as seems sluggish |
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What is your diff? Know?
I run 4.12 Diff, like the torque for the mountains. Works way well and no
issue for speed, not sure why people push the 3.88.. RB _________________ [quote="smitty24"]"HELP, I ported my own heads and now have fire coming out my ass" .[/quote]
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mark tucker Samba Member
Joined: April 08, 2009 Posts: 23937 Location: SHALIMAR ,FLORIDA
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Posted: Sun Sep 16, 2018 3:13 pm Post subject: Re: 2110 with 44 idfs should I change vents as seems sluggish |
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whats the quench distance? what is the dist? how is the dist curve?what intakes? the jetting looks right, but may need more main due to low cr, but not a lot and probably wont feel it. what exhaust?head work?you could possiably degree the cam about 4-6 advanced more for the low cr....but remember it's not a 2332 so it aint gonna be a rocket ship. 1.34 rockers may help and should be a bolt on if the geo is right now. if the quench distance is wide that will also contribute to your slugynishy engine. there is a lot of unknowns on our end ,you have all the answers right there... it should run good, a fast dist curve may help if it's a crap oe style curve. |
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RailBoy Samba Member
Joined: March 10, 2008 Posts: 2904 Location: Virginia
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Posted: Sun Sep 16, 2018 6:18 pm Post subject: Re: 2110 with 44 idfs should I change vents as seems sluggish |
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Hello Mr. Mark, have you heard the deal before on the vents are a ratio formula on the valve size to get initial, You have seen a lot of engine and tuning..? RB _________________ [quote="smitty24"]"HELP, I ported my own heads and now have fire coming out my ass" .[/quote]
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madmike Samba Member
Joined: July 11, 2005 Posts: 5291 Location: Atlanta,Michigan
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Posted: Mon Sep 17, 2018 4:28 am Post subject: Re: 2110 with 44 idfs should I change vents as seems sluggish |
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I'd try them 32mm venis ,but 43mm maybe the cat's meow? _________________ 'Black Ice'Drag Buggy 'Turbo'
Rail Buggy 1915 turbo
76 Drag/Street bug 2180cc 'Turbo' 11:85 @113 mph"If I go any faster I'll burn up the Hamster" ,gets 28 mpg. also 10/09/22 11.90 @115 mph
"If I'm ever on Life Support,UNPLUG Me, Then Plug me back In see if that Works" |
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old gh bug Samba Member
Joined: February 22, 2013 Posts: 197 Location: UK
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Posted: Mon Sep 17, 2018 4:41 am Post subject: Re: 2110 with 44 idfs should I change vents as seems sluggish |
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mark tucker wrote: |
whats the quench distance? what is the dist? how is the dist curve?what intakes? the jetting looks right, but may need more main due to low cr, but not a lot and probably wont feel it. what exhaust?head work?you could possiably degree the cam about 4-6 advanced more for the low cr....but remember it's not a 2332 so it aint gonna be a rocket ship. 1.34 rockers may help and should be a bolt on if the geo is right now. if the quench distance is wide that will also contribute to your slugynishy engine. there is a lot of unknowns on our end ,you have all the answers right there... it should run good, a fast dist curve may help if it's a crap oe style curve. |
Maybe im just use to driving my modern 250 bhp car and im comparing it with that !!!!
The distrbutor is a Flamethrower pertronix 11 with silver springs
Heads have had work they are 044 's
As for quench distance havent got a clue never heard of it ??
If i try the 32mm vent what jetting would anyone recommend?? |
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bugguy1967 Samba Member
Joined: January 16, 2008 Posts: 4338 Location: Los Angeles, CA 90016
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Posted: Mon Sep 17, 2018 8:25 am Post subject: Re: 2110 with 44 idfs should I change vents as seems sluggish |
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Kind of hard to help without knowing what exact work was done to your heads. Quench distance is deck height plus any extra space in the head before the flat surface that's parallel to the piston crown.
Vent to valve ratio might be a decent rule-of-thumb, but what if you have stock ports with 42mm intake valves? A large venturi won't help at all. It will depend more on your minimum port cross section. _________________ "A petrol engine can start readily, run smoothly and give every appearance of being in good order, without necessarily being in good tune." - Colin Campbell, "The Sportscar Engine" |
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tommiebsmith Samba Member
Joined: April 16, 2008 Posts: 106 Location: AUSTIN
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Posted: Mon Sep 17, 2018 10:22 am Post subject: Re: 2110 with 44 idfs should I change vents as seems sluggish |
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also a 2110 can be a 82x90.5 or a 76x94 ??
I'd also lean towards the idea of your trans being a 3.88 based on the car that it is in?? but that is not fact.. just an assumption.
Vent size can add low end torque and take away from top.. the torque is what makes the seat of your pants say if it is snappy or not..
personally - I'd too look at timing and jetting for the "snap" you are looking for
and hopefully there is a good compression for the setup/valve size you are running. |
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vwracerdave Samba Member
Joined: November 11, 2004 Posts: 15280 Location: Deep in the 405
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Posted: Mon Sep 17, 2018 3:11 pm Post subject: Re: 2110 with 44 idfs should I change vents as seems sluggish |
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tommiebsmith wrote: |
also a 2110 can be a 82x90.5 or a 76x94 ?? |
NO
If you want to fuck around and worry about doing the math to 6 or 7 digits past the decimal point maybe they will come out close but the standard in the VW community has always been
76X94 = 2109
82X90.5 = 2110 _________________ 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
Featured in Dec. 2001 HOT VW's Magazine page 63
Watch my racing video's http://www.youtube.com/user/okvwracer/videos |
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