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 Post subject: Re: Dcoe sizing
PostPosted: Fri Oct 19, 2018 2:05 pm 
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Board Sponsor & SL6 Racer

Joined: Wed Oct 23, 2002 7:57 pm
Posts: 9108
Location: Waynesboro, Pa.
Car Model: 65 Valiant 2Dr Post
All you smart guys just throw the "junk" carbs my way.

I ain't got me nearly nuff of dem dare smarts to do dat fuel conjection stuff

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2 Mopars come with Spark plug tubes. One is a world class, racing machine. The other is a 426 CI. boat anchor!
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 Post subject: Re: Dcoe sizing
PostPosted: Fri Oct 19, 2018 3:30 pm 
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Supercharged
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Joined: Sat Nov 27, 2004 8:03 pm
Posts: 10040
Location: IRWIN PA
Car Model:
Never said carbs are junk.


They have a place and purpose.

I will keep carbs for other projects.. so you hafta still find that $50 carb and talk the down to 2 nickels...


:D :D

Greg

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 Post subject: Re: Dcoe sizing
PostPosted: Fri Oct 19, 2018 3:44 pm 
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Board Sponsor & SL6 Racer

Joined: Wed Oct 23, 2002 7:57 pm
Posts: 9108
Location: Waynesboro, Pa.
Car Model: 65 Valiant 2Dr Post
Quote:
so you hafta still find that $50 carb and talk the down to 2 nickels...
That's my style!! :lol: :lol:

_________________
2 Mopars come with Spark plug tubes. One is a world class, racing machine. The other is a 426 CI. boat anchor!
Image
12.70 @ 104.6
Image


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 Post subject: Re: Dcoe sizing
PostPosted: Fri Oct 19, 2018 5:41 pm 
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Board Sponsor & Moderator
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Joined: Thu Oct 17, 2002 7:27 pm
Posts: 14769
Location: Park Forest, Illinoisy
Car Model: 68 Valiant
I just think efi might be easier with a blower.

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 Post subject: Re: Dcoe sizing
PostPosted: Sat Oct 20, 2018 3:27 am 
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Board Sponsor & SL6 Racer

Joined: Wed Oct 23, 2002 7:57 pm
Posts: 9108
Location: Waynesboro, Pa.
Car Model: 65 Valiant 2Dr Post
Quote:
I just think efi might be easier with a blower.
For sure!

_________________
2 Mopars come with Spark plug tubes. One is a world class, racing machine. The other is a 426 CI. boat anchor!
Image
12.70 @ 104.6
Image


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 Post subject: Re: Dcoe sizing
PostPosted: Sat Oct 20, 2018 10:09 pm 
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EFI Slant 6
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Joined: Thu Jan 13, 2005 1:01 pm
Posts: 482
Location: waynesboro PA
Car Model: 72' Dart Swinger / 62' Valiant
I made some changes to the idle/low rpm circuit and jetting today that seemed to make some huge improvements to the way the car performs at the low end and transitioning up through the rpms. Its unbelievable how much better it got today. Even the AF guage held steady at around 13:1. I am confident the car will idle and not shut off while staging anymore. Hoping for the best at knoxville. Its amazing what re-reading a book and double checking everything can help with.

All of the reading/re-reading i've done still seems to point to the DCOE 45s with 40mm venturi's running out of volume by 6000 rpm. For a 225 slant 6 turning over 6500rpm the charts show a 45mm Venturi (or a DCO 50SP carburetor). Its all intriguing because Cameron made more power on the 45's (with a max venturi size of 40).

I wish there were a few more people running some of the big webers.

_________________
Ryan Covalt
62 Plymouth Valiant Race Car 2170# 11.008 @ 117.65 MPH 1/4 Mile Best
72' Dart Swinger Street Car, 4 spd, 3330# 14.061 @96.58 1/4 mile Best


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