20g help

wicked98gsx · 08-01-2012, 06:49 PM

Ok so I have just run across a steal on a 20g and an safc2 for basic tuning. Now I cant afford dsmlink just yet so I just need to know the bare basics on fuel upgrades to get me going... here is what I have on my car now..

godspeed FMIC
MBC
greddy bov
2.5 full custom exhaust with cat still attached

As far as I know I have no fuel upgradescause I havent done any and the previous owner never did tell me if he had. I know im looking at getting new injectors but I dont know what size and I keep getting different size responces such as evo 8/9 stock injectors and was even told that I will be ok with my stock 450's as long as I keep my boost down . I have an afpr to keep my pressure up but im running off a stock fuel pump. What upgrades do I need to do this install?

Also I read that I should get oil feed from the head..... i Don't understand what that means...... thank for the help

whiteboyz · 08-01-2012, 08:51 PM

The biggest Injectors you can use on an safc is 650's.

You can either buy a waly 190 or 255. and do a fuel pump rewire
2G Fuel Pump Rewire, Pictorial with Diagram

You also need to think about your power goal's and go from there. There is no point in buying Injectors twice. Buy big the first time (as stated above safc is only capable of 650's)

What they mean by getting oil from the head, is there is a bolt on the passanger side of the head for oil supply, The stock 2g turbo gets it's oil from the oil filter housing. Which honestly is better to get the oil from then the head. The OFH has cleaner oil.

You may need an oil restrictor for the turbo you want to use. Justin(Jusmx141) Would be able to tell you better then I.

Also make sure all maint is up to date. there are alot of good reading on this site and the vfaq's.

VFAQ Site - Visual Frequently Answered Questions

LOLVTEC · 08-01-2012, 10:23 PM

You can run a 20g at 8 lbs of boost but why even install it. To use the full potential of your 20g you need to have the support mods also. Is like putting some nice nike running shoes on someone that's not in shape. Sure it will fit on his feet but will it be used properly. That would be a negative. Save money for link, upgrade you're fuel step (just get 1000cc). You can probably run 20 lbs of boost without putting to much stress on your engine if your stock. If you're built crank it up to 35lbs

JusMX141 · 08-01-2012, 10:42 PM

Quote:

Originally Posted by whiteboyz

The OFH has cleaner oil.

How is the oil at the head any dirtier than the oil directly at the filter housing? It's not like the oil within the head is scavenged directly from the pan....take a guess where it comes from before it reaches the head.

The oil at the filter housing is cooler, but it's also three times the pressure of the oil at the head so a restrictor is required any time you're feeding a MHI turbo from the filter housing. Even the factory 2G T25 is restricted at the filter housing.

A 20G should never see more than 48psi of oil pressure at the inlet under load. The head is lower than this, the filter housing is much higher than this. Your options are to source from the head and hope it provides enough oil to keep the turbo alive should you be running a lot of boost, or source from the filter housing and add a restrictor to keep from flooding the cartridge from extreme oil pressure and volume.

wicked98gsx · 08-02-2012, 10:13 AM

Ok... I have a 16g now at 12psi (it bucks hard over that). As far as I can see there is no restrictor on the oil feed line from the filter. I have very good power with it with no tune at all. Im trying to get ecufash instead of an safc. I have a kid so Im not looking for extreme power... maybe 300 so I can play around on the weekends. Would it be smarter to just get a full exhaust instead and get more power that way. Im just not financially ready to get all these parts I need to do this upgrade

96ETT · 08-02-2012, 10:56 AM

Your not gonna get any HP from an exhaust upgrade. It would be in the measurement error of any dyno. Just save your money to keep your car running. Buy some new filters and plugs and wires. Sounds like your not ready for a turbo upgrade.

omega260 · 08-02-2012, 11:05 AM

Quote:

Originally Posted by wicked98gsx

Im just not financially ready to get all these parts I need to do this upgrade

Then you should save up and not.rush anything before you break it and have to spend even more.money. Also I wouldn't be running the 16g untuned like that.

whiteboyz · 08-02-2012, 12:32 PM

Quote:

Originally Posted by JusMX141

How is the oil at the head any dirtier than the oil directly at the filter housing? It's not like the oil within the head is scavenged directly from the pan....take a guess where it comes from before it reaches the head.

The oil at the filter housing is cooler, but it's also three times the pressure of the oil at the head so a restrictor is required any time you're feeding a MHI turbo from the filter housing. Even the factory 2G T25 is restricted at the filter housing.

A 20G should never see more than 48psi of oil pressure at the inlet under load. The head is lower than this, the filter housing is much higher than this. Your options are to source from the head and hope it provides enough oil to keep the turbo alive should you be running a lot of boost, or source from the filter housing and add a restrictor to keep from flooding the cartridge from extreme oil pressure and volume.

Woops lol, Cleaner, cooler, apples and bananas ?

.

I know where the oil comes from haha. I had a blonde moment while I was typing.

wicked98gsx · 08-02-2012, 12:36 PM

Quote:

Originally Posted by omega260

. Also I wouldn't be running the 16g untuned like that.

well I can do 1 of 2 choices for my car.... I can either still pick up the safc and tune it or a gm maf and maft... which would be better for me. Im vented to atmosphere but im also auto so i dont have the issue of the idle crapping out on me.(so far)

So I mot getting the 20g now since im not that far yet. Im going to keep the 16g and port the exhaust housing this weekend. I know that helps air flow a little. Like I said before.. 300 awhp is my max goal for a while. I think the safc would be easier for me to tune till I get link. All i know for sure is im getting 18mpg with no tune and it sucks a**.

LOLVTEC · 08-02-2012, 06:06 PM

Good luck tuning with the safc. And when you hit fuel cut let us know, you'll know when you hit fuel cut because the first thing you'll do is post here freaking out. at least get a 190 walbro if you upgrade your injectors.

Btw im running 1000cc, fp frank level 5 with supporting mods. if i drive like a regular person i can get 24+mpg but if i drive like i have extra money for gas i get about 13mpg lol. Damn Hondas always make me step on the gas.

wicked98gsx · 08-02-2012, 06:40 PM

Quote:

Originally Posted by LOLVTEC

Good luck tuning with the safc. And when you hit fuel cut let us know, you'll know when you hit fuel cut because the first thing you'll do is post here freaking out. at least get a 190 walbro if you upgrade your injectors.

Btw im running 1000cc, fp frank level 5 with supporting mods. if i drive like a regular person i can get 24+mpg but if i drive like i have extra money for gas i get about 13mpg lol. Damn Hondas always make me step on the gas.

So im guessing I should go with the gm maf till I get link.... and I understand the honda thing completely.

honda_burner · 08-02-2012, 07:08 PM

Quote:

Originally Posted by LOLVTEC

You can probably run 20 lbs of boost without putting to much stress on your engine if your stock. If you're built crank it up to 35lbs

Umm no? Stock fuel system will keep up with 13 psi, 15 if your daring. 20 pounds is asking for a world of trouble.

honda_burner · 08-02-2012, 07:11 PM

Quote:

Originally Posted by LOLVTEC

You can run a 20g at 8 lbs of boost but why even install it. To use the full potential of your 20g you need to have the support mods also. Is like putting some nice nike running shoes on someone that's not in shape. Sure it will fit on his feet but will it be used properly.

And yeah that's a pretty damn good comparison. I can't talk too much. Im running a 20g without tune. It works but I can't use HALF of what its got potential for.