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kamshaft91 Samba Member
Joined: November 14, 2013 Posts: 60
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Posted: Fri Aug 28, 2015 4:32 am Post subject: Jetting |
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Looking to get into the ball park.
Engine:
1600
VZ15 cam
37x32 valves with minor port work (fluff n buff)
Dual HPMX 40
1 1/2" street header (extractor type) with dual quiet packs occasionally stinger
German bosch 009
C/R is 8:1
Current jetting is
115 mains
52 idels
200 airs
F11 e-tubes
28 vents
This is a new engine from brothers machine shop. Driving elevation is sea level and the engine is in a type 1 with a Rancho Pro Street trans 4.12 R&P with .82 fourth. Tires are 195x65xR15 in the rear and 145R15 up front.
Please let me know if this is close or if I need to change some stuff around jetting wise.
Thank you
Kam |
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56vwoval Samba Member
Joined: March 21, 2010 Posts: 186 Location: nowhere USA
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Posted: Fri Aug 28, 2015 4:44 am Post subject: jets |
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How does it run? 52 idles are a little large! _________________ Remember guys and girls, you can be right or you can be happy with your significant other! You decide which is right at that time! |
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kamshaft91 Samba Member
Joined: November 14, 2013 Posts: 60
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Posted: Fri Aug 28, 2015 9:12 am Post subject: |
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It idles nicely lol I have to bleed the breaks before I can drive it, but out of the box that's what they come with and when I first got them I ran them that way on a 1600 with stock heads C20 cam 7.5:1 C/R and 1 5/8 merged header with singer. It ran great instant throttle response idle was around 900 rpm. Only thing that suffered was bottom end and I think that was due more to the fact I was running an exhaust that was way too big. |
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stan_tichomirov Samba Member
Joined: May 24, 2005 Posts: 1719 Location: San Francisco, CA
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Posted: Fri Aug 28, 2015 9:45 am Post subject: |
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You are in the ballpark, start tuning. Sort out the idles first (it would help to try 50s if you had them), then the mains (you shouldn't need larger than 130 IMO). This would be for sea level.
FWIW, I also have a .82 4th and have had good success with 50 idles on my 1835. Spanish 40IDFs though, some say HPMXs like larger idles. I'm using 30mm venturis.
Stan _________________ Aircooled.net
Jansen Enterprise
My 1835cc build
My budget 2276 build |
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kamshaft91 Samba Member
Joined: November 14, 2013 Posts: 60
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Posted: Mon Aug 31, 2015 11:35 pm Post subject: |
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Update:
Finally got the car to idle and hold steady at about 900 RPM
Cureently running
52 idles
115 main
175 airs
F11 e-tubes
Timing at 32*
Idle mixtures screws are at 2 turns out any more out it stalls and any more in it stalls. Idle speed screws are one full turn after touching throttle arms. Both throttles open at the same time and open to full throttle no problems.
Now I think I may be to lean on the idle jets because when I floor it without load it wants to stall out but if I blip it then floor it it'll rev up no problem. What do you guys think? |
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[email protected] Samba Member
Joined: August 03, 2002 Posts: 12785 Location: Salt Lake City, Utah
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Posted: Tue Sep 01, 2015 6:40 am Post subject: |
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If it stalls more than 2 turns out on the mixture screws your idle jets are too big. Try 50s. _________________ It's just advice, do whatever you want with it!
Please do NOT send me Private Messages through the Samba PM System (I will not see them). Send me an e-mail to john at aircooled dot net
"Like" our Facebook page at
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vwsb74 Samba Member
Joined: July 30, 2009 Posts: 1201 Location: socal
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Posted: Tue Sep 01, 2015 8:58 am Post subject: |
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[email protected] wrote: |
If it stalls more than 2 turns out on the mixture screws your idle jets are too big. Try 50s. |
Weber said if morethan 2 turns its too lean. When I put 70 idle in my idas it was 2+ turns and when I changed it to 65 it went to 1 3/4 turns. _________________ 74 super beetle
2011 ford explorer traded
2010 mazda 3 hatchback
2014 Honda odyssey
2180cc 48IDA clone
Xr310 cam =171hp@6k rpm sold so as the car😢 |
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[email protected] Samba Member
Joined: August 03, 2002 Posts: 12785 Location: Salt Lake City, Utah
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Posted: Tue Sep 01, 2015 11:58 am Post subject: |
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but you aren't even remotely close to LBI. You said it would stall >2, which means you are too rich. And 70 idles on IDAs is a joke also way too rich. _________________ It's just advice, do whatever you want with it!
Please do NOT send me Private Messages through the Samba PM System (I will not see them). Send me an e-mail to john at aircooled dot net
"Like" our Facebook page at
http://www.facebook.com/vwpartsaircoolednet
and get a 5% off code for use on one order for VW Parts ON OUR PARTS STORE WEBSITE, vwparts.aircooled.net |
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stan_tichomirov Samba Member
Joined: May 24, 2005 Posts: 1719 Location: San Francisco, CA
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Posted: Tue Sep 01, 2015 12:05 pm Post subject: |
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You are not lean on idles, I can almost guarantee it. I can make my 1835 stink rich and cover the fender with soot with 50s.
If it were me, I'd try 50s, get it dialed in and then try 47.5s. But, I have the jets handy.
Stan _________________ Aircooled.net
Jansen Enterprise
My 1835cc build
My budget 2276 build |
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vwsb74 Samba Member
Joined: July 30, 2009 Posts: 1201 Location: socal
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Posted: Tue Sep 01, 2015 12:15 pm Post subject: |
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[email protected] wrote: |
but you aren't even remotely close to LBI. You said it would stall >2, which means you are too rich. And 70 idles on IDAs is a joke also way too rich. |
That Was an example only. FYI I have 60/110 idles and it runs better now than my old setup 65/120. 60/120 will drop off the face . Too lean:(
Sorry man I don't wanna Highjack your thread. _________________ 74 super beetle
2011 ford explorer traded
2010 mazda 3 hatchback
2014 Honda odyssey
2180cc 48IDA clone
Xr310 cam =171hp@6k rpm sold so as the car😢 |
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kamshaft91 Samba Member
Joined: November 14, 2013 Posts: 60
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Posted: Tue Sep 01, 2015 2:20 pm Post subject: |
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Ok I'll give those a shot. How many turns out should I be at? Reason I ask is because according to the setup instructions I got from empi with the current jetting it should be 1 to 2 turns out, but according to aircooled.net carb jetting article it says 3-4. |
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stan_tichomirov Samba Member
Joined: May 24, 2005 Posts: 1719 Location: San Francisco, CA
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Posted: Tue Sep 01, 2015 3:11 pm Post subject: |
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I don't go by turns, 1 1/2 initially? Start it up, get it warm, turn in screws till it pops a d turn back out a little. Make sure all barrels pull same amont, syns linkage, repeat. Then, tweak timing, repeat.
Stan _________________ Aircooled.net
Jansen Enterprise
My 1835cc build
My budget 2276 build |
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