to carb or to inject?

88347lx · Mar 26, 2009

i have a 347 just comming out of the machine shop and would like some feedback on fuel delivery. should i inject or carb? what works best?

SMOKEDYA · Mar 26, 2009

well what do you want it to be? street or track car? N/A or power adder? Most say and i beleive also a carb is a way better track car,power adder (s/c or turbo) EFI it. post some pics. i just did a swap also. peace

john

88347lx · Mar 26, 2009

as soon as the block is on the stand i'll take a pic for ya.. so are you saying if i don't use adders to carb it?

white 89 GT · Mar 26, 2009

+1 for carb on track car.

SMOKEDYA · Mar 26, 2009

i would carb it if your gonna mostly track the car.

BayBoss · Mar 27, 2009

I would carb it and buy my blow through setup. Comes with carb and everything else you need.

fiveohwblow · Mar 27, 2009

BayBoss said:
I would carb it and buy my blow through setup. Comes with carb and everything else you need.

shameless plug

86turbo · Mar 28, 2009

It really depends on how much money you want to spend and how much time you want to spend tuning it...

I feel that "out of the box" a carb will out-perform EFI but with fuel injection the tuning possibilities are endless. With some effort in the tune, you will pull on that carb you were running any day of the week. Do you have any tuning experience? Are you interested in learning? If so then go EFI or even better, DFI! Things like tweecer, pms, megasquirt, etc leave you with a ton of options for how you'd like to go about squeezing more power out of your combo

Good luck and let us know which direction you go.....they both have their pros and cons

Drew

88347lx · Mar 28, 2009

thanks Drew, thats the kind of feedback i was looking for...so does the tweecer deal replace the computer or just reprogram it? i'd like to learn how to make ajustments to the system.. do you do this kind of thing?

injection will be the way i go, the tuning options sold me..

thanks again
Dave

86turbo · Mar 29, 2009

the tweecer more or less tweaks the factory ecu....It'd be a good idea to have a laptop handy so you can make changes on the "fly". Devices like the PMS are hand-held and very user friendly. I am running a PMS in my turbocharged hatch and I like it. The fancier setups (like PMS) are more expensive than tweecers.....that's the downside. It's convenient to make changes though using the controller and keep on cruising. No laptop required with mine UNLESS you want to datalog (which I do) BTW are you familiar with wideband o2's? Depending on how wild your setup is you will mainly be tuning for WOT.... The critical issues here are A/F and total timing. Despite the tuning device you use, you'll need something to monitor your A/F and a way to change your timing. Tuning isn't all it's cracked up to be......most people just lack the testicles to give it a shot.

Drew

SMOKEDYA · Mar 29, 2009

If you do go EFI nate has good experience on the mega squirt system (i beleive?) if you do go EFI go see john at HP ranch for a tune! It's a well worth 3 hour drive up north! But a 95% drag car carbed! EVERY N/A car in the NMRA (atleast 2 years ago) was carbed! All the power adder cars (turbo/S/C) was EFI.But also carbed cars are streetable but maybe not a daily driver streetable. But then to if you can tune a carb go for it! Plus it's cheaper carbed. peace

john

86turbo · Mar 29, 2009

There ya go.....pay someone to tune your car using the tuning device you just bought. Read my above post about individuals who lack testicles.....

Drew

fiveohwblow · Mar 30, 2009

My testicles work perfectly fine as do those in my family, assuming I wouldnt be here otherwise. That being said, both my father and I, as well as John chose HP Ranch owner John to tune our cars because hes the best. Takes balls to admit as a man someone else is better at something than me.

Gearbanger 101 · Mar 30, 2009

I wanna know what it’s going in? If it’s to replace the mill in your '88 LX (which I assume you have now based on your screen name), you're probably better off to stick with an EFI set up. The return fuel system is already set up, wiring, computer, sensors are all in place. You're further ahead moving forward at this point, then back pedaling into some archaic carbureted set up.

Carbs are fine if you're building a car from scratch on a budget, but any time you're working with an existing EFI platform, its always more economical and less hassle to stick with what you've got. The only driving conditions a carb comes close to performing on par with a good running EFI set up are WOT running down the track. And even that's all out the window now with the latest tuning software available for the EFI guys. The performance and tunabilty advantage continues to lean towards the EFI.

88347lx · Mar 30, 2009

i'll get me a tuner and play with it and if i **** it up then i'll take it to someone, but i should be able to figure it out thanks Drew..
Dave

88347lx · Mar 30, 2009

thanks to everybody for all the good stuff.. i'll post pix later this week of my 88 lx droptop injected 347.

88347lx · Mar 30, 2009

HP ranch?

SMOKEDYA said:
If you do go EFI nate has good experience on the mega squirt system (i beleive?) if you do go EFI go see john at HP ranch for a tune! It's a well worth 3 hour drive up north! But a 95% drag car carbed! EVERY N/A car in the NMRA (atleast 2 years ago) was carbed! All the power adder cars (turbo/S/C) was EFI.But also carbed cars are streetable but maybe not a daily driver streetable. But then to if you can tune a carb go for it! Plus it's cheaper carbed. peace

john

where is that?

SMOKEDYA · Mar 30, 2009

Yes it is senceless to buy a tunner and then take it to someone to tune it. But if you caint figure it out then what? Like Gearbanger 101 said if your already set up for EFI then just stay with it.Not only are you 99% of the way there but you have to hack into the wireing harness's. Lots involved to do the conversion correctly.peacehttp://www.hpranch.com/

john

88347lx · Mar 30, 2009

ranch?

SMOKEDYA said:
Yes it is senceless to buy a tunner and then take it to someone to tune it. But if you caint figure it out then what? Like Gearbanger 101 said if your already set up for EFI then just stay with it.Not only are you 99% of the way there but you have to hack into the wireing harness's. Lots involved to do the conversion correctly.peacehttp://www.hpranch.com/

john

thats just a hop ship and jump from my place. i'm in olympia wa...thanks

86turbo · Mar 30, 2009

""That being said, both my father and I, as well as John chose HP Ranch owner John to tune our cars because hes the best. Takes balls to admit as a man someone else is better at something than me.""

Nah, it takes balls to do it yourself and actually read up and learn fundamentals of tuning your car instead of shellin out the coin for someone else to do it. It's not rocket science.

""Yes it is senceless to buy a tunner and then take it to someone to tune it. But if you caint figure it out then what?""

If you can't figure it out then reading might help....god knows there are tons of threads/forums on tuning engines. This is, what I feel, separates the boys from the men. Tuning your own **** is not only cheaper but you feel like you accomplished something....you also learn more about your engine. You just put together an engine, Jon, what makes you think tuning it is so out of reach?

Drew

to carb or to inject?

88347lx

New Member

SMOKEDYA

88347lx

New Member

white 89 GT

Member

SMOKEDYA

BayBoss

Member

fiveohwblow

Official Member

86turbo

Member

88347lx

New Member

86turbo

Member

SMOKEDYA

86turbo

Member

fiveohwblow

Official Member

Gearbanger 101

Straight Outta Locash

88347lx

New Member

88347lx

New Member

88347lx

New Member

SMOKEDYA

88347lx

New Member

86turbo

Member

Similar threads

to carb or to inject?

New Member

New Member

Member

Member

Official Member

Member

New Member

Member

Member

Official Member

Straight Outta Locash

New Member

New Member

New Member

New Member

Member

Similar threads

Privacy & Transparency

Privacy & Transparency