:::RHMT::: Real Home Made Turbo

General Category => Engine Management => Topic started by: krazy4 on October 17, 2011, 01:44:23 AM

Title: School me on draw through carbs
Post by: krazy4 on October 17, 2011, 01:44:23 AM
I know carbs suck, but it's what I got and fuel injection is not free.

Victim is a 80 Yamaha XS1100 that I want to boost because it's slow.

I have been reading a lot, but wanna see if any of you guys have experience with this type of setup.
Apparently I have to run a carbon seal on the turbo and backfires will ruin my day.  :'(
Title: Re: School me on draw through carbs
Post by: Joseph Davis on October 17, 2011, 03:41:52 PM
Fuel injection is free.  Talk to Fred of FreeEMS and tell him I sent you, with a name like FreeEMS I'm sure he's happy to buy everything for you out of pocket.
Title: Re: School me on draw through carbs
Post by: krazy4 on October 17, 2011, 05:43:34 PM
Fuel injection is free.  Talk to Fred of FreeEMS and tell him I sent you, with a name like FreeEMS I'm sure he's happy to buy everything for you out of pocket.

That'd be cool, but then I have to buy injectors, a fuel pump, and other shit. I'll go to fuel injection when I get some more money and get fed up with the carbs.
Would really like to make it work with the carb. Not looking for insane power.
Title: Re: School me on draw through carbs
Post by: HiProfile on October 18, 2011, 01:12:26 PM
Most junkyard cars' (from the 90's) fuel pumps are the same in the sense you have a inlet w/sock, hose barb outlet, and a DC motor. Civic injectors will handle 40whp per injector. Newer civic/rsx injectors will do over 55whp each when decapped.

I put together my fuel injector setup for under $20, including used pump, rail, hoses, and filter. You will probably spend as much time reconfiguring a carb as you would getting a "not insane power" mpfi setup rolling from Fred.

IMO carbs are for go karts and hill billies. And even now kart guys are testing fuel injection.
Title: Re: School me on draw through carbs
Post by: krazy4 on October 18, 2011, 03:52:50 PM
Most junkyard cars' (from the 90's) fuel pumps are the same in the sense you have a inlet w/sock, hose barb outlet, and a DC motor. Civic injectors will handle 40whp per injector. Newer civic/rsx injectors will do over 55whp each when decapped.

I put together my fuel injector setup for under $20, including used pump, rail, hoses, and filter. You will probably spend as much time reconfiguring a carb as you would getting a "not insane power" mpfi setup rolling from Fred.

IMO carbs are for go karts and hill billies. And even now kart guys are testing fuel injection.

I'll look into injection. I'd actually prefer it, but carbs are readily available to me. Although a draw through system doesn't really need any changes to run a turbo application except jetting. It's the blow through carbs that need a lot of changes.
Title: Re: School me on draw through carbs
Post by: PhilStubbs on October 18, 2011, 03:57:23 PM
This thread makes me want to run fuel injection on my lawnmower.
Title: Re: School me on draw through carbs
Post by: Joseph Davis on October 18, 2011, 09:45:14 PM
Fuel injection is free.  Talk to Fred of FreeEMS and tell him I sent you, with a name like FreeEMS I'm sure he's happy to buy everything for you out of pocket.

That'd be cool, but then I have to buy injectors, a fuel pump, and other shit. I'll go to fuel injection when I get some more money and get fed up with the carbs.
Would really like to make it work with the carb. Not looking for insane power.

No, I'm sure Fred would buy all that stuff for you.  If he doesn't it's not FreeEMS, now is it?
Title: Re: School me on draw through carbs
Post by: krazy4 on October 18, 2011, 11:19:24 PM
Fuel injection is free.  Talk to Fred of FreeEMS and tell him I sent you, with a name like FreeEMS I'm sure he's happy to buy everything for you out of pocket.

That'd be cool, but then I have to buy injectors, a fuel pump, and other shit. I'll go to fuel injection when I get some more money and get fed up with the carbs.
Would really like to make it work with the carb. Not looking for insane power.

No, I'm sure Fred would buy all that stuff for you.  If he doesn't it's not FreeEMS, now is it?

That'd be fucking fantastic.
Title: Re: School me on draw through carbs
Post by: j.h.christ on October 19, 2011, 07:41:17 PM
those xs1100's have REALLY weak rods. i'd talk to tom@oczc about a cheap set, i know he was doing a 79$ special for a while.
Title: Re: School me on draw through carbs
Post by: HiProfile on October 19, 2011, 10:33:56 PM
This thread makes me want to run fuel injection on my lawnmower.

The main problem with 1 & 2 cylinder apps is they act like ITB's. It's a problem for people who learn to tune on the interweb.
Title: Re: School me on draw through carbs
Post by: Joseph Davis on October 20, 2011, 09:40:34 AM
This thread makes me want to run fuel injection on my lawnmower.

The main problem with 1 & 2 cylinder apps is they act like ITB's. It's a problem for people who learn to tune on the interweb.

Baby jesus made MAFs for a reason.
Title: Re: School me on draw through carbs
Post by: HiProfile on October 20, 2011, 02:05:51 PM
And I was gonna add that I never seen someone try it, but figured nobody would notice.

A basemap for an unknown MAF/motor combo would be a prob for most people.
Title: Re: School me on draw through carbs
Post by: PhilStubbs on October 20, 2011, 02:55:12 PM
Trial and error. I can't imagine it would be too difficult.