what inj should i run

[patsdsm]

I have a 6bolt in my 2g with a evo3 at 20 psi what inj. should i run. and cluch it is a gst.

 

[Dream On]

I'd say get 650 cc injectors, and most people would say an ACT 2100, but I like my Spec Stage 3.

 

[GILZTSIAWD]

agreed on the 650's and clutch, maybe even a 2600 for a few extra bones for some more insurance.

 

[EclipseTrbo420A]

HOw will you be tuning ? People say 650's are rough on an SAFC.

 

[CanadianTSi]

650's, and they will be fine wiht an S-AFC...

 

[sweet97]

650cc's www.fic.com has them on sale I believe.
You could even add a MAF-T to tune them and have the addition of added intake flow. I use the MAF-T myelf with 950cc FIC's. Mark
PS: I have an EPROM ECU and a stage 3 DSMchip!
To the writer of this thread have you ever checked to see if you have an EPROM ECU? You could have.

 

[daren_p]

Yes go with 650's, their fine with the SAFC but that about the limit you want to go. With 7xx + injectors you will end up with way to much timing advance.

 

[patsdsm]

It will be with a safc 2

 

[patsdsm]

I do not have a eprom ecu it is a 99 not a 95 that came with the eprom ecu

 

[patsdsm]

do you guys think that 550cc inj are to small for the setup that i am running.

 

[sweet97]

I do not have a eprom ecu it is a 99 not a 95 that came with the eprom ecu

Your vehicle description sasy you have a '90!!??

 

[sweet97]

do you guys think that 550cc inj are to small for the setup that i am running.

IF you have an EVO 16G on the '99(not a '90!) then 550's are toosmall to fully utilize the turbo. IMHO 550's are for the 14b and small 16G, anything else should have at least 650's. Mark

 

[DGajre777]

650ccs for the Evo III turbo. Also, you are going to need an AFPR for the 255 if you want to prevent overrun.

For a good tune:
550ccs - SAFC or MAFT
650ccs - MAFT + SAFC or SAFC
750+ccs - DSMLink or something other than SAFC/MAFT

If you are looking a MAFT + SAFC + Logger setup look at www.ecuplus.com/features.htm, it does the same in one unit. You don't need to buy a MAFT, it has inputs for EGT and wideband, simulated o2 sensor (for people without a cat) and other stuff.

 

[patsdsm]

This is one of my friends. He has a 90 i have a 99

 

[mavisky]

Get 650's for it. I had the 510's on big fuel pressure before and they were just barely enough at 20psi.

 

[larsrya8]

You don't need to buy a MAFT, it has inputs for EGT and wideband, simulated o2 sensor (for people without a cat) and other stuff.

I would assume that buying the MAF-T would probably be because it flows more rather than its tuning abilities. Especially if one already has a S-AFC. There isn't anything tuning-wise that the MAF-T can do that a S-AFC can't... right? They both alter the airflow signal to achieve the desired results.

 

[Synapses]

I would assume that buying the MAF-T would probably be because it flows more rather than its tuning abilities. Especially if one already has a S-AFC. There isn't anything tuning-wise that the MAF-T can do that a S-AFC can't... right? They both alter the airflow signal to achieve the desired results.

Yah, so having both the Maf-t and the S-AFC is silly. They are both doing the same thing.

 

[mavisky]

Not so fast. I know plenty of people who like to use the maft just to replace the factory mas, zero it out, and then tune with the s-afc.

The safc has more adjustment points and can be easier to tune since you're not having to remember how many clicks you've turned the maft. I've got the maft right now and I'll be adding an eprom on top of it to make the base tunning a bit easier.

 

[larsrya8]

I was responding to this:

If you are looking a MAFT + SAFC + Logger setup look at www.ecuplus.com/features.htm, it does the same in one unit. You don't need to buy a MAFT, it has inputs for EGT and wideband, simulated o2 sensor (for people without a cat) and other stuff.

I don't agree that "having both the Maf-t and the S-AFC is silly [because] they are both doing the same thing." Tuning-wise the S-AFC is "better" than the MAF-T. But the MAF-T flows way more than a stock MAS, so it serves a different purpose completely.

Anyway, to repeat what everyone else has said: You need 650's to completely max out an Evo3 16G. That size is also conveniently the largest size you can tune with a "piggy-back" fuel controller.

As for the clutch, I plan on running a Spec clutch because of it's lighter pedal pressure. Lighter pressure is good for the 1G's because it helps preserve the clutch pedal assembly, and it's better for the 2G's because it preserves our finicky thrust bearing. If you don't want a Spec clutch you can try the "Centerforce Dual-Friction Clutch" as well.

 

[DGajre777]

Yah, so having both the Maf-t and the S-AFC is silly. They are both doing the same thing.

In a way, yes they both control injectors. But you need a MAFT, if you get a GM MAF, it is not an option (unless you go with ECU Plus).

I was responding to this:

I don't agree that "having both the Maf-t and the S-AFC is silly [because] they are both doing the same thing." Tuning-wise the S-AFC is "better" than the MAF-T. But the MAF-T flows way more than a stock MAS, so it serves a different purpose completely.

Yes, tuning wise S-AFC is "better" than the MAF-T. But the MAF-T removes a big restriction before the turbo and allows you to vent. You can't vent without a MAF-T and if you have 650cc injectors, tuning is a pain, idle is crappy with the MAF-T alone. For a good tune and proper tuning with 650ccs you need a SAFC or SAFC + MAFT. If you have the SAFC + MAFT, you can't tune with both (as mavisky said), you zero out the MAFT and tune with the SAFC.

 

[larsrya8]

I see what you're saying... ECU+ directly interfaces with the GM MAF without the need for the translator.

 

[mavisky]

Yea I've got 650's on the maft alone and it took me forever to get it to idle and drive right. The settings on it are kinda weird. That's why I'm sending my ecu out to Steve and letting him do a custom eprom chip for me as well as do some minor repair/maintenance on it. Noone in the world I'd trust it my ecu to more than Steve.

 

[patsdsm]

I want about 350 whp to 400 whp are you guys still saying 650 cc i was thinking some rc 550 cc or so i had 650 cc it was way to rich. On the safc it was at -27 or so and that was at 17 psi and 15 psi.

 

[missouri_dsm]

I have 580cc injectors and they work great

 

[dsm-onster]

Don't most get the MAFt so that they can run a maf upgrade AND tune...

I mean to say that I could have cared less about my MAF flow when I was getting A/F spikes and running mega-lean bacause the 1g maf can't read airflow over 300 hp well. I'm sure the head gasket I blew would have liked to see the ecu know really how much air was truely being injested by the engine... The side benefit is the enhanced spool from running in blowthru or having the "phhh-ttt" sound. The diameter of the 1G maf isn't the restriction, IMHO. It is simply the fact that it drops the signal randomely under high flow, which is not very pleasant to engine internals.

If you have a 2G, then you don't need the maf upgrade. The safc would be great becasue it offers more intricate tuning points than even DSMLink.

BTW, most people never get to SBR's level w/ the evo3 16G. Most will never get over 340 hp with it. And the 550s can handle that fine... BUT if you upgrade to a larger turbo the 650s might not be enough... In all, if you are a little patient, the 650s are fine to tune and more than enough for the evo3 16G.