I'm (hopefully) going to be converting to a dual 45 DCOE setup for my car. It's main purpose will be auto-x. I'm just curious about fuel delivery. Not that I can make complete sense out of it, but it has gotten me to thinking, I was told that with the dual DCOE setup, fuel delivery can become an issue through turns, and hard hard cornering. The setup I've been working out with another company is not going to be cheap, so running too lean is something I'm very worried about.

Any suggestions? Any "watch out for's"? Last thing I want to do is put all this time and $$ into this car, and have it seize up on me from starving my engine through turns.


Modified by markmdz89hatch at 8:15 PM 10/16/2003


Modified by markmdz89hatch at 8:20 PM 10/16/2003

 

People I know or have met that run carbs have to have a replacement or additional fuel pump.

 

I've never had fuel starvation with a DCOE (except when I was way too low on gas - but that isn't a carb issue).

Not sure what you are talking about with your "13:1" setup (I assume you mean compression ratio, but that has nothing to do with the carbs), if you tune the carbs right then you have no worries about going lean. It isn't that hard, you should just buy a book (many good Weber tuning books out there).

Not sure what you are talking aobut either with the "well oiled" comment (yes, I do have a car that runs dual side draft carbs, and I do know what I'm talking about).

How about rephrasing your post with specific questions (or clarifying what you did type).

Scott

 

Scott,

I edited the post a bit after re-reading it. I don't think the "I know what I'm talking about" comment was all that neccessary though. No one is doubting your intelligence, and clearly I don't have a car that's running dual side-drafts (yet), nor do I claim to know everything about the setup. Hence the inquiry.

What pump have you been running on your Celica? Do you Auto-x, road-race, drag, or just daily-drive the Celica?

After a bunch of calling around, and searching on the internet, I've determined that the Carter 4070 is the most suitable pump for the job. Has anyone out there tried this pump? What were your findings?

 

I'm just running a cheap Facet pump in my car (little electric unit). It is quite noisy (brrrrrrrrrrrrr, kind of a machine gun sound), but it gets the job done, and the price was right.

Rated to about 200 hp at 3 psi. I don't even run a regulator.

I've been running my car at autocross and track events with no problems (except for the fuel pickup in the tank). The only time I've really run too lean was when I had poor carb jetting (and that is a black art in itself - a little dyno time can work wonders).

While I don't daily drive the Celica (the '73) it does start and run fine in the winter, even with no chokes on the carbs (it doesn't get that cold here in NC).

Scott

PS: sorry if I came off a bit harsh, it's been (and still is) on of those days at work.

 

I have dual Mikuni sidedrafts, fed by a Holley Red pump, regulated to 3.5psi. I have never had any fuel starvation issues in 4 years of autocrossing.

FWIW, I know many other people running 84-87 Civics and CRXs with Weber DCOEs that have never had fuel issues.

HTH