2g maf ?

[93AWDDSM]

hey, i am going to be upgrading soon to a 2g MAF and i was wondering if i should wait until i get 560 injectors and a set up for MAF-T.

anyways i guess the question i am going to ask is if i run the 2g MAF without MAF-T or SAF-C or something will it run rich or anything?

thanks

 

[talondave]

hey, i am going to be upgrading soon to a 2g MAF and i was wondering if i should wait until i get 560 injectors and a set up for MAF-T.

anyways i guess the question i am going to ask is if i run the 2g MAF without MAF-T or SAF-C or something will it run rich or anything?

thanks

You can run a 2g mas without injectors or safc, it will run a tad lean..
I dont recommend running more than stock boost levels untill you get injectors..

 

[93AWDDSM]

alright cool, thanks for the advice

 

[habitatguy187]

You can run a 2g mas without injectors or safc, it will run a tad lean..
I dont recommend running more than stock boost levels untill you get injectors..

A tad? It will make your car pull approximately 25% of the fuel out. DO NOT do this without bigger injectors or an safc/the like. You'll run so lean that you'll burn a hole in your motor the first WOT pull.

 

[futurevokiller]

well as far as ive been able to find running 550cc injectors is an easy way to compensate for the extra airflow, but will run slightly rich, but driveable. and an afpr or afc of sorts in addition to 550's or larger will be all you need to run great. what ive been trying to figure out is, if i get a 2g maf on my stock 1g and get an safc, will i be able to run good with my stock injectors? or will i have to upgrade my injectors as well? cause i only have enough to buy either 550's or an afc, not both.. which one would be the best? help please!

 

[Spoolin18]

well as far as ive been able to find running 550cc injectors is an easy way to compensate for the extra airflow, but will run slightly rich, but driveable. and an afpr or afc of sorts in addition to 550's or larger will be all you need to run great. what ive been trying to figure out is, if i get a 2g maf on my stock 1g and get an safc, will i be able to run good with my stock injectors? or will i have to upgrade my injectors as well? cause i only have enough to buy either 550's or an afc, not both.. which one would be the best? help please!

I would go with the afc, it can add up to 50% fuel or take away up to 50% fuel. It will easily compensate for the 2g maf and just like habitat guy said the 2g maf takes about 25% fuel out, so the afc would be better IMO.

 

[habitatguy187]

cause i only have enough to buy either 550's or an afc, not both.. which one would be the best? help please!

I would buy the 550s first, an afc can wait. And by the time you're ready to get one you'll probably have changed your mind to get link, SD or an eprom chip.

I've been running this combo for almost a year now with no afc, can't tell a difference in driveability or idle at all, sure it shows on the logger (higher timing fuel trims etc.) but I can't tell it any other way. It's not the best thing to do but it will work fine as long as your not pushing the limit of your setup.

 

[Spoolin18]

I'll do one better, just save up and get ecmlink and a wideband before you do anything. IMO, that is the first two upgrades that should be done. You will never outgrow 'em. On the other hand you will most likely outgrow 560cc injectors and you might want to run a 3" gm maf or SD down the road instead of a 2g maf.

 

[zhjiln]

go ahead and do the 2G MAF and EVO injectors... and is definitely doable, daily drivable combo ...

also, i myself have found the 560cc injectors more than adequate for my s16g at 18 psi ..

 

[Spoolin18]

go ahead and do the 2G MAF and EVO injectors... and is definitely doable, daily drivable combo ...

also, i myself have found the 560cc injectors more than adequate for my s16g at 18 psi ..

I'm curious, what is your injector duty cycle.

 

[futurevokiller]

ok thanks guys, i think im just gonna go ahead and try to find a set of 550's or 560's. ill probably then get an afc or some other tuning system once spring comes around. but hopefully it will run good and reliably just w/ the 2g maf and the injectors. if someone has a set of injectors theyre willing to let go for around 100 bucks pm me!

also im having trouble finding anything about this, would i be able to fit a 2g injen intake pipe with a 2g maf and filter on it in my 91 gsx?? i already ordered the maf and pipe so i sure hope i can figure somethin out!! ive heard it doesnt fit cause its too long, and if thats the case, couldnt i just hack a little of the pipe or use a more compact filter?? thanks!!

 

[JusMX141]

A tad? It will make your car pull approximately 25% of the fuel out. DO NOT do this without bigger injectors or an safc/the like. You'll run so lean that you'll burn a hole in your motor the first WOT pull.

Not exactly. I believe the number is closer to -17% correction by the 2G MAS.

I ran a 2G MAS on my 1G FWD for two years with a Big 16G on the stock fuel system at 15psi with no correction from an AFC. I always logged and kept an eye on knock. The car ran GREAT; a little sluggish off idle and while the engine was cold, but I honestly feel it actually cleaned up the stock fuel curve enough to make the car run perfect.

It's not like you're instantly going to destroy your engine by doing this, just be sure to log and keep a watchful eye on what's going on.

also im having trouble finding anything about this, would i be able to fit a 2g injen intake pipe with a 2g maf and filter on it in my 91 gsx?? i already ordered the maf and pipe so i sure hope i can figure somethin out!! ive heard it doesnt fit cause its too long, and if thats the case, couldnt i just hack a little of the pipe or use a more compact filter?? thanks!!

It's going to be too long- especially on a 1Ga with the headlight motors in the way.

Why did you dump the extra money on an Injen intake? The eBay intakes are exact replicas of an Injen at 1/4th the price. It's only a piece of cast aluminum- name brands don't matter here.

 

[habitatguy187]

Not exactly. I believe the number is closer to -17% correction by the 2G MAS.

I think Jeff O told me it was actually closer to 29%, twdorris said something like 22% so I'm not sure who's right.

I ran a 2G MAS on my 1G FWD for two years with a Big 16G on the stock fuel system at 15psi with no correction from an AFC. I always logged and kept an eye on knock. The car ran GREAT; a little sluggish off idle and while the engine was cold, but I honestly feel it actually cleaned up the stock fuel curve enough to make the car run perfect.

That's interesting

I suppose that fuel trims could correct the idle and cruise settings while WOT is so rich from factory anyway that it probably worked just fine. I suspect that I've been running rich under boost for awhile now.

 

[futurevokiller]

well i found an injen for a good deal on the classifieds on here so i figured id get it since i know injen makes a damn good intake.. and as for it not fitting, im pretty sure im gonna be able to do it, i have a pic on my laptop of a 1ga engine bay thats got an injen, 2g maf, and filter all crammed in their.. ill post it when ive got my laptop handy

 

[habitatguy187]

I've seen people do it but I really don't see how with pop-up headlights. I had to hack and cut away part of my bay to make mine fit, stupid decision that I regret doing now but back then it was my daily and I had already done all the wiring so I had to make it fit.

 

[JAYFRESSH]

May I suggest since your looking at intakes anyways , why not buy a EVO maf ?

I've seen people do it but I really don't see how with pop-up headlights. I had to hack and cut away part of my bay to make mine fit, stupid decision that I regret doing now but back then it was my daily and I had already done all the wiring so I had to make it fit.

Are you referring to the injen intake with a 2g maf ? Or just fitting a 2g maf into a 1ga in general ?

 

[moi1463]

May I suggest since your looking at intakes anyways , why not buy a EVO maf ?



Are you referring to the injen intake with a 2g maf ? Or just fitting a 2g maf into a 1ga in general ?

what is the benefit of changing to and evo maf?

 

[JAYFRESSH]

what is the benefit of changing to and evo maf?

3G/EVO mafs flow more than 2g , and take you to a round pipe , instead of oval .

 

[habitatguy187]

3G/EVO mafs flow more than 2g , and take you to a round pipe , instead of oval .

And will also throw your timing straight through the roof on a 1g. Don't do it unless you have link.

 

[futurevokiller]

Are you referring to the injen intake with a 2g maf ? Or just fitting a 2g maf into a 1ga in general ?[/QUOTE]

we were talking about fitting a 2g injen intake pipe with a 2g maf and a filter into a 1ga. reading around found most people saying it wouldnt fit unless you hacked the pipe a bit and/or got a compact filter. but heres the picture i mentioned earlier check it out

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[tscook3]

I don't know how you car/ intercooler/piping is set up but another option would be to put on a 3" gm maf. That way you can just get rid of the factory mafs and with a translator you can vent your blow off valve to the atmosphere instead of keeping it recirculated. Get a little sound back into it. But the 2g maf will work. I'd go ahead and put the injectors on/ get them. But shouldn't cause you too much trouble temporarily.

 

[JusMX141]

I think Jeff O told me it was actually closer to 29%, twdorris said something like 22% so I'm not sure who's right.

-29% correction? That's nuts.

If that were true you could drop 650's in and literally have little to no correction. We know that's not the case as I ran 450's with a 2G MAS for years and there are guys using 550's that say they're still a tad rich, showing that the -17% I gave may be more like -12% or -15%.

 

[futurevokiller]

so jusmx141, would my car run good then if i get my 2g maf on and drop 550's or 560's? and if i were to just run stock 450's with the 2g maf it would be driveable but slightly lean correct? am i going to damage anything if i run lean or rich for a little while or will it be fine till i can afford a maf-t or safc? thanks in advance everybody

 

[zhjiln]

I'm curious, what is your injector duty cycle.

88% 3rd gear pull ...

 

[habitatguy187]

-29% correction? That's nuts.

If that were true you could drop 650's in and literally have little to no correction. We know that's not the case as I ran 450's with a 2G MAS for years and there are guys using 550's that say they're still a tad rich, showing that the -17% I gave may be more like -12% or -15%.

I know it sounds crazy but that's what I read. I myself am pretty sure that I'm running rich under boost and know that I'm running rich during idle/cruise because my fuel trims are so low.

FutureEvoKiller: You'll probably be fine due to the pig rich factory maps, but it's a little scary for my taste. Another thing to keep in mind is that the 2g mas will raise your base timing, making knock more likely to happen, especially on 450s. Whereas if the 550s have you running a little rich it would help keep the knock away.

20% of 9.2 (factory a/f target according to twdorris) is 1.84, which would put you right around an 11.0:1 a/f ratio if the 2g mas pulls exactly 20% of the fuel out.

Most guys aim for 11.1:1 a/f on pump gas so you'd theoretically be right on the money, just make sure you don't run out of fuel on those injectors.