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1641 bug
Samba Member
Joined: October 03, 2005
Posts: 14
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 Posted: Sat Oct 08, 2005 9:53 pm Post subject: my dyno run |
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| well i put my 1970 1641 dual port ,weber 44 gas drinking rocket up onthe horsepower pump and it threw down 64.19 hp and 81.04 flbs of torque at 12.1air fuel ratio a littel rich i know and i was wondering if that good power for what i have? |
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ice baller61
Samba Member
Joined: October 10, 2003
Posts: 499
Location: 562 downey
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| Posted: Sat Oct 08, 2005 11:51 pm Post subject: |
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Yea that is awsome HP. There is a guy in here with a 2L who gets about the same HP as you  NO offense to any one 
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SeVVenth
Samba Member
Joined: August 18, 2005
Posts: 678
Location: Winterset, Iowa
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| Posted: Sun Oct 09, 2005 12:30 am Post subject: |
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| ice baller61 wrote: |
| Yea that is awsome HP. There is a guy in here with a 2L who gets about the same HP as you NO offense to any one |
And superbtl has 600 and some more cc too... He's havin some bad luck. |
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Glenn 
Mr. 010
Joined: December 25, 2001
Posts: 79536
Location: Sneaking up behind you
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| Posted: Sun Oct 09, 2005 2:53 am Post subject: |
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It's all in the "combo".
You can't just throw a bunch of parts into a box, shake and expect to get a highly tuned engine.
Carefully matching parts, meticulous assembly and alot of time final tuning will give you the most horsepower. That's why my 1904cc outruns many larger engines.
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Glenn
74 Beetle Specs | 74 Beetle Restoration | 2180cc Engine
"You may not get what you pay for, but you always pay for what you get"
Member #1009
#BlueSquare
עַם יִשְׂרָאֵל חַי |
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mharney
Samba Member
Joined: June 01, 2002
Posts: 8353
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| Posted: Sun Oct 09, 2005 7:22 am Post subject: |
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| Glenn wrote: |
| You can't just throw a bunch of parts into a box, shake and expect to get a highly tuned engine. |
Why?? That's what I did. It worked. Now I have this shabby pieced together 2332.
Ok, ok, so it's cookbook. So what. |
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superbtl
Samba Member
Joined: March 03, 2005
Posts: 687
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| Posted: Sun Oct 09, 2005 7:39 am Post subject: |
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when reading air fuel ratio, what is rich and what is lean.my car had a reading of 14.2 on my better run of 86 hp then i loost a cylinder( dyno guy accidentally unplugged #1 spark plug) and i had an a/f reading of 12.5 and had a hp reading of 58.7 on 3 cylinders.
so when i had the 86 hp run on 4 cylinders with an a/f reading of 14.2 i was way too rich ...correct? |
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clearsurf2001
Samba Vaccinator
Joined: February 26, 2004
Posts: 1671
Location: Dave-AKA-fortyeye-Oceanside, Ca
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| Posted: Sun Oct 09, 2005 7:47 am Post subject: |
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| superbtl wrote: |
when reading air fuel ratio, what is rich and what is lean.my car had a reading of 14.2 on my better run of 86 hp then i loost a cylinder( dyno guy accidentally unplugged #1 spark plug) and i had an a/f reading of 12.5 and had a hp reading of 58.7 on 3 cylinders.
so when i had the 86 hp run on 4 cylinders with an a/f reading of 14.2 i was way too rich ...correct? |
Incorrect ... it's an air/fuel ratio. 14.2 is leaner than 12.5.
On another note ...
| mharney wrote: |
| Glenn wrote: |
| You can't just throw a bunch of parts into a box, shake and expect to get a highly tuned engine. |
Why?? That's what I did. It worked. Now I have this shabby pieced together 2332.
Ok, ok, so it's cookbook. So what. |
Sorry ... have to hold up the BULLS%#T card here 
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Get ready for the injection 
| EverettB wrote: |
| Make sure it is coherent. Rodney |
| mharney wrote: |
I think Glenn has an EMPI crank in his engine. |
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superbtl
Samba Member
Joined: March 03, 2005
Posts: 687
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| Posted: Sun Oct 09, 2005 7:51 am Post subject: |
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| would that mean i need more fuel top end |
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ice baller61
Samba Member
Joined: October 10, 2003
Posts: 499
Location: 562 downey
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| Posted: Sun Oct 09, 2005 7:57 am Post subject: |
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| superbtl wrote: |
| would that mean i need more fuel top end |
I think every one is tryin to tell you , you need better heads or a different combo
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clearsurf2001
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Joined: February 26, 2004
Posts: 1671
Location: Dave-AKA-fortyeye-Oceanside, Ca
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| Posted: Sun Oct 09, 2005 7:57 am Post subject: |
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| superbtl wrote: |
| would that mean i need more fuel top end |
You're rehashing your problem (covered in your other thread) ... re-read what Mark, Darren, Glenn, John, Jake, etc. had to say about carb setup, cam duration, compression, etc. IIRC you have some people (local) that want to help you ... don't jump to any conclusions about your a/f ratio until the basics are solid.
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Get ready for the injection
| EverettB wrote: |
| Make sure it is coherent. Rodney |
| mharney wrote: |
I think Glenn has an EMPI crank in his engine. |
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clearsurf2001
Samba Vaccinator
Joined: February 26, 2004
Posts: 1671
Location: Dave-AKA-fortyeye-Oceanside, Ca
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| Posted: Sun Oct 09, 2005 8:00 am Post subject: Re: my dyno run |
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| 1641 bug wrote: |
| well i put my 1970 1641 dual port ,weber 44 gas drinking rocket up onthe horsepower pump and it threw down 64.19 hp and 81.04 flbs of torque at 12.1air fuel ratio a littel rich i know and i was wondering if that good power for what i have? |
BTW ... very good dyno run. Fine tune that bad boy and find a few more hidden ponies. A wideband 02 sensor and an Innovate a/f meter can work wonders.
_________________
Get ready for the injection
| EverettB wrote: |
| Make sure it is coherent. Rodney |
| mharney wrote: |
I think Glenn has an EMPI crank in his engine. |
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mharney
Samba Member
Joined: June 01, 2002
Posts: 8353
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| Posted: Sun Oct 09, 2005 8:11 am Post subject: |
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What you need is more fuel at LOAD conditions. 14.7 is the ideal ratio for economy I believe, but VWs don't like it. They like 13.5 to 14.0 for cruise and about 12.5 for power.
For a pretty decent read on combustion chemistry, read this:
http://www.autoshop101.com/forms/h55.pdf
Ideally, you can jet so that you can have about 13.5 to 14.0 AFR during cruise, at most reasonable speeds and RPM ranges, and about 12.5-12.8 AFR under heavy load and WOT, but getting there is pretty hard. You have to decide:
1. How much energy you want to put into perfection
2. What's more important to you as a target - power or economy
3. How much money you want to sink into getting it perfect or close
Carbs aren't perfect, and with weather and altitude changes, the numbers will skew a little.. Fact of life. You can get close though, and 25MPG is a reality you can achieve if you put enough into it. Of course, if you drive with a heavy foot, forget it.
But none of this means a lot until everything else is pretty well matched up. A bastard combo may do better at other numbers. |
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nsracing
Samba Member
Joined: November 16, 2003
Posts: 9744
Location: NOVA
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| Posted: Sun Oct 09, 2005 5:10 pm Post subject: man 'o man... |
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| superbtl wrote: |
| would that mean i need more fuel top end |
SB...
You have got one of the bigger engines around. Those are NOT tiny parts you have in the motor. For some reason the motor is NOT producing anywhere near what is it supposed to be.
You need to re-do that motor. Back up and go into that thing and see what is up in there.
No amount of tuning will make that motor run if the "mechanics" of it is NOT close to perfect. You probably have a deck height of 1/2" for all you know. CR of 6:1? Chambers too big for the application.
Take it apart and just re-do it man.
Ciao. |
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