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[SudoSTI]

Awesome! I was wanting to tune it myself but having 2150cc injectors and a rotated S256 with a 3" MAF intake seemed like it would probably be a bit too advanced to start out on lol. This ought be an excellent way to get my feet wet. I'll have to figure out the injector/MAF situation though as I don't have a stock sized MAF or injectors anymore. :/

 

[HolyCrapItsFast]

Awesome! I was wanting to tune it myself but having 2150cc injectors and a rotated S256 with a 3" MAF intake seemed like it would probably be a bit too advanced to start out on lol. This ought be an excellent way to get my feet wet. I'll have to figure out the injector/MAF situation though as I don't have a stock sized MAF or injectors anymore. :/

Oh thanks, just give me the worst possible starting point a person could have going into a tune... EEESH!!!!!

:tard:

 

[SudoSTI]

I believe in you! Actually we can hash out the best plan of attack once I get the sumbitch put back together. I just ordered my KSTech phenolic spacers and will be working on flipping my Spec C intake manifold when they get here.

 

[HolyCrapItsFast]

If you don't mind me asking, why such big injectors? and what cams? Are you running E85?

I only ask because getting those to idle along with the big MAF is going to be difficult and if you are using gasoline and big cams it will be even harder. You would only need injectors like that for 650+ HP and if we are talking power like that then I might recommend you go Speed Density because even an 83mm MAF is not going to be enough IMO. The 76mm MAF will support about 500HP

What brand injectors are they?

 

[SudoSTI]

If you don't mind me asking, why such big injectors? and what cams? Are you running E85?

I only ask because getting those to idle along with the big MAF is going to be difficult and if you are using gasoline and big cams it will be even harder. You would only need injectors like that for 650+ HP and if we are talking power like that then I might recommend you go Speed Density because even an 83mm MAF is not going to be enough IMO. The 76mm MAF will support about 500HP

What brand injectors are they?

They are FIC 2150s and TBH the only reason I got them is because I was going to have Aaron at English Racing tune it and that's what he recommended. He has told me they are the best big injectors to get to idle like smaller injectors and they run E85 very well. My original intent was to go E85 since I have a station right by my house. That kind of ended up in the air with me leaning more toward a pump tune as my turbo choice and the rest of the setup changed. I was going to go more balls to the wall with it (Full Race TS BW EFR kit) but decided to stay a bit more conservative for the time being just to get it on the road. I just want to drive the damn thing. :lol: The cams are Kelford 272s and they were already in the motor when I bought it. I also wanted to stay on MAF because I didn't want to get an AP and Aaron said the OS speed density is balls (paraphrasing in my own words) and he only does speed density on an AP. But then when I bought my spindles and talked to STI 2NR, he told me he ran OS speed density on his setup and had no issues so now I don't know what to think. I was also told that tuning on the 3" intake wouldn't be a problem.

 

[HolyCrapItsFast]

They are FIC 2150s and TBH the only reason I got them is because I was going to have Aaron at English Racing tune it and that's what he recommended. He has told me they are the best big injectors to get to idle like smaller injectors and they run E85 very well. My original intent was to go E85 since I have a station right by my house. That kind of ended up in the air with me leaning more toward a pump tune as my turbo choice and the rest of the setup changed. I was going to go more balls to the wall with it (Full Race TS BW EFR kit) but decided to stay a bit more conservative for the time being just to get it on the road. I just want to drive the damn thing. :lol: The cams are Kelford 272s and they were already in the motor when I bought it. I also wanted to stay on MAF because I didn't want to get an AP and Aaron said the OS speed density is balls (paraphrasing in my own words) and he only does speed density on an AP. But then when I bought my spindles and talked to STI 2NR, he told me he ran OS speed density on his setup and had no issues so now I don't know what to think. I was also told that tuning on the 3" intake wouldn't be a problem.

As long as you don't exceed 25ish lbs of boost you should be OK with the 76mm MAF. If you want much more than that then you will need either an 83mm MAF or convert to SD. I have never had a problem with Open Source SD. The only thing with OS is if you use it in hybrid mode, it hits a limit related to the MAF itself. So I run full SD when I do Open Source. I like full SD anyway because the AIT sensor location is key for proper SD operation and if you move that from the MAF location, it will throw off the MAF calculations when in MAF mode. The only way to do hybrid correctly is to leave the AIT sensor with the MAF and go with a blow through setup. To much bother IMO.

OS does not scare me at all. Much of the development either came from them or was inspired by them and that was evident to me when COBB hired their main developer. OS is no more buggy than COBB IMO.

I do feel your injectors are unnecessary big for the goal. What kind of boost levels are we talking and what HP are you expecting?

 

[SudoSTI]

As long as you don't exceed 25ish lbs of boost you should be OK with the 76mm MAF. If you want much more than that then you will need either an 83mm MAF or convert to SD. I have never had a problem with Open Source SD. The only thing with OS is if you use it in hybrid mode, it hits a limit related to the MAF itself. So I run full SD when I do Open Source. I like full SD anyway because the AIT sensor location is key for proper SD operation and if you move that from the MAF location, it will throw off the MAF calculations when in MAF mode. The only way to do hybrid correctly is to leave the AIT sensor with the MAF and go with a blow through setup. To much bother IMO.

OS does not scare me at all. Much of the development either came from them or was inspired by them and that was evident to me when COBB hired their main developer. OS is no more buggy than COBB IMO.

I do feel your injectors are unnecessary big for the goal. What kind of boost levels are we talking and what HP are you expecting?

I was going with the 3" intake to match the inlet of the turbo, not so much for the larger MAF size. But hell if we can do full on SD I would actually prefer that route anyway. Well I'm still on the stock MAP sensor right now so I would be limited by that. My buddy has an 07 STI with stock long block aside from drop in pistons and has pretty much the same setup otherwise and laid down 412whp/386wtq on pump (http://forums.nasioc.com/forums/showthread.php?t=2601848) at 21.5psi target. I would imagine I could potentially run more boost (with a bigger MAP) being on E85, correct? I think my main limiting factor will be my bottom end. It's a Crawford S1 so it's just drop in pistons really and I don't want to push the rods/bearings too hard. But on E85 I could potentially get more power overall, with my P&P heads and 272s I would imagine I would end up with more top end, and I don't have AVCS doh so my torque won't come on quite as brutal.