20G Install

[Way2real316]

Whats up everybody im currently deployed overseas with the us army. Since ive been deployed i saved a nice chunk of change. I wont to upgrade my turbo to a 20g i have a 98 gst what mods do i need to safely run the turbo? i searched old links but it didnt help much. If i complete all stage 1 mods and bolt on the 20g would the engine be fine??? i wanna keep it under 2grand for suppourt mods. Im trying to buy a 240sx as a seconed car. Could i run the 20g with the mods i have now (K&N Air filter H.K.S SS Bov Apc boost gauge) ??? any feed back would help.

 

[NOSLO2PT0]

not sure if stg 1 mods include bigger fuel pump/injectors/fuel control, but you definitely need them. Also, gonna need to make new turbo ->IC piping when you install the 20G.

 

[SoCaliEclipse]

Originally posted by NOSLO2PT0
Also, gonna need to make new turbo ->IC piping when you install the 20G.

Not necessarily, you can just get a 90 degree elbow welded on and that will make it a complete bolt on turbo

If you'd like info about the 20G, PM me or ask questions here. I put mine on a few weeks ago and absolutely love it! I would NOT run a 20G with your mods right now. You will need many more things, check out my mod list, the most recent thing is the 20G and I was just ready for it. You need fuel pump at minimum (you CAN use a 20G with stock fuel system, but its not a good idea) or at LEAST a re-wire if you are going to low-ball it. Then from there, you DEFINATELY need a downpipe and O2 sensor housing. You will also need some sort of boost controller (either MBC or EBC)....you need the O2 and DP because if you dont have either you are going to get killed with creep. I have an external dump, and it still creeps. My problem is that i dont have a cat, and my exhaust system is TOO free flowing (full 3" turbo back, no cat)... I would get like a Road Race downpipe and cat, then a ported Evo O2 housing.

Let me know if you have any other questions about supporting mods or about the turbo. I am having a few issues with creep, but it will be taken care of by the end of this coming week. I am 100% happy with my setup and I highly recommend it to you. Just make sure your car is ready for it cause it is a pretty big turbo (not the biggest by any means tho ) and you dont want to destroy your car by putting something on it that it cant handle. Sorry for the long reply, good luck!

Brian

 

[SoCaliEclipse]

Oh, i almost forgot, i didnt look at your mod list, but you will DEFINATELY need a full exhaust system (this will include your O2 housing and DP mentioned before) with some brand of large diameter pipin for flow or else you wont spool the damn thing till 5500rpm+

 

[Way2real316]

Thanks for the info. I still have some??? You said you were having problems with creep because you’re exhaust was to free flowing. I understand that you need some back pressure. Would a cat be too restrictive for a 20g? Or should I go with a straight pipe? I would prefer to use a cat because its legal second I didn’t see upgraded fuel injectors in your profile will the upgraded fuel pump be enough to get me started fuel wise? Lets see where did you order the 20g? Which is better internal or external waste gate? What is day to day driving like? Can you really notice the lag is it mostly hype. Did you do the install yourself? Do you know of anyhow to pages or F.A.Q's on the net I could use? I know he 20g doesn’t require a kit but I want to be safe thanks again I know his is a lot to read

 

[Phoenix_RsX]

Yeah, I'm pretty damn interested myself......I'm currently running a big 16G, and there is no point scrapping the whole turbo if I can easily upgrade to a 20G. Way2real, tho this is not the turbo I have, but I do know that if you don't get turbo rotated, that you have to get an install kit. If you don't get it rotated, IMO RRE is the best way to go. the install kit should be around 199$, and you'd also be better off getting an oil return line off of a 94 GSX. You can drill the wholes off of your oil return line, but I wouldn't suggest it.

Would a cat be too restrictive? On a 20G I'd say yes. tho it isn't the biggest, baddest turbo out there.....the 20G on the right car can kick some serious ass. I'm going with a straight pipe-Apexi N1 turbo-back to be exact.....I don't really car about being legal. and if worse comes to worse, I can always buy a cat, gut it out, and give the perception that I have one-it's all about perception . Touching on your fuel question. Yes a pump is good, but if you are running a 20G I would think you at least need 550s, tho alot of ppl would say 660s.

I feel a bit of lag with my 16G, so it would indeed be a bit more evident in a 20G......but it may not be a bad thing if you are FWD like me......however ppl will have their own opinions about lag. Lastly, if I'm not mistaken, www.vfaq.com(or roadraceengineering.com) will have step by step details on installs. It only took me about 3 1/2 hours to do mine, only because I didn't run into any probs.

 

[SoCaliEclipse]

Originally posted by Way2real316
Thanks for the info. I still have some??? You said you were having problems with creep because you’re exhaust was to free flowing. I understand that you need some back pressure. Would a cat be too restrictive for a 20g? Or should I go with a straight pipe? I would prefer to use a cat because its legal second I didn’t see upgraded fuel injectors in your profile will the upgraded fuel pump be enough to get me started fuel wise? Lets see where did you order the 20g? Which is better internal or external waste gate? What is day to day driving like? Can you really notice the lag is it mostly hype. Did you do the install yourself? Do you know of anyhow to pages or F.A.Q's on the net I could use? I know he 20g doesn’t require a kit but I want to be safe thanks again I know his is a lot to read

I have some different opinions that Phoenix RSX....
1. Definately use a cat. Today I just put my stock downpipe on with cat to see if that fixed my creep issues. Sure enough, it was gone. With bigger turbo's and an internal WG you will have more of a need to have some back pressure because it is a more efficient wheel. I HAD an N1 DP with no cat and it had great power, but it creeped. So like I said, right now I am stock DP and I am going to have a 3" cat (not gutted) welded to my N1 DP.

2. Yes, the fuel pump (255lph in my case) is enough to get your started, however you do not want to go past 16psi with a rewired 255 (according to Mike at RRE)

3. I got my 20G from RRE, I am buddies with Mike, so I can't really say the price , but its a good deal . If you want the best deal out there, get the Slow Boy racing 2G20G. It is fully bolt on and I have heard from many people that they get it for $750 new plus shipping

4. External is always better and more efficient. However, for pricing, the internal is a better way to go. now that I have gotten rid of my creep, I have no complaints about internal .

5. Day-to-Day driving is great! Actually, I noticed LESS lag than my friends Big16G with porting and clip . His spooled at about 4300 and mine spools at about 3500 (with stock DP and cat, however with N1 DP it was at 3200) Most people think that it is a laggy turbo, but I dont think so at all. Also, most people that say it is too laggy have never driven or ridden in one

6. Yes, I did the install myself, it was easy. It took me about 6 hours (mainly because I had to make 3 runs to the parts store and I was not hurrying (read: I was being lazy hehe). If you want a list of the parts you will need let me know and i can try to remember everything. It is not as easy an install as a 16G because the compressor housing is so much bigger. Even with that said, it was an easy install. I did it all myself and with a buddy with no VFAQ or stuff like that

good luck man!

Brian

 

[Phoenix_RsX]

SoCali.....you do create some good views.....and it's definitely something I will consider when I get off of my ass and get the 20G. That 2G20G is defintely the front runner for me....my J-pipe is starting to get on my nerves....But going back to the cat....I plan on my 20G being externally gated so I really shouldn't have to worry about not having a cat.........at least I don't think I do .....oh well, I'll find out soon.

 

[DCJ98GST]

SoCal,

Did you clip the turbine?

 

[LandoAWD]

Originally posted by Phoenix_RsX
SoCali.....you do create some good views.....and it's definitely something I will consider when I get off of my ass and get the 20G. That 2G20G is defintely the front runner for me....my J-pipe is starting to get on my nerves....But going back to the cat....I plan on my 20G being externally gated so I really shouldn't have to worry about not having a cat.........at least I don't think I do .....oh well, I'll find out soon.

You could run an open DP...much less a catless system with an external.


SoCali...nice thought out post.

 

[SoCaliEclipse]

Originally posted by DCJ98GST
SoCal,

Did you clip the turbine?

25 degree clip on TDO5h exhaust wheel....I am kinda kicking myself for not getting the TDO6H, but its all good, I really love my turbo

 

[SoCaliEclipse]

Originally posted by LandoAWD


You could run an open DP...much less a catless system with an external.


SoCali...nice thought out post.

Thanks, and you are 100% correct on that one! An External gate is the way to go but it also is a lot more money. My next turbo will be externally gated

 

[sidoze]

"i did the install myself" *looks at cut up hands* man that hurts what about rob bro? come on...haha

if brian had a 38mm flapper rather than 34 it wouldnt creep when set to 15psi. with the 34 mm flapper it seems it wanted to run 19-20psi...which makes sense since thats what mike ran.id rather get a bigger flapper and evo housing than a cat but thats me.

brian wanna trade exhausts

 

[SoCaliEclipse]

Originally posted by sidoze
"i did the install myself" *looks at cut up hands* man that hurts what about rob bro? come on...haha

brian wanna trade exhausts

Yes, sorry, Mike and Rob helped with the install, and I said I did it with a friend at the end of the post

I see that Mike, you are opening your eyes to the light of Greddy Evo...hehe

 

[sidoze]

nawh not really....i love my 107 dB death can

 

[NOSLO2PT0]

I noticed LESS lag than my friends Big16G with porting and clip . His spooled at about 4300 and mine spools at about 3500

SoCali, if your friends' B16G spooled at 4300, I would stay away from him in terms of tuning tips etc. Your system has to be pretty jacked up to get full boost at late of an rpm. 4300 rpm for full boost is 60-1, or full T4 range. 16G's should see full boost no later than 3500 on an avg. tuned car.

25 degree clip on TDO5h exhaust wheel....I am kinda kicking myself for not getting the TDO6H

I've never seen a 20G offered with a TD06H wheel. Usually the optional turbine wheel is the TD06. TD06H wheel is a little big for a 20G comp. side. Not saying it's impossible, but not very common combo.

 

[qwkdsm2]

i was just wondering if i could use a 190lph for the 20g .....i'll upgrade later though....also tell me all i need to run 20g on my stock 1g awd eclispe....tell me the parts i need and you guys recommend i get first

 

[NOSLO2PT0]

i highly doubt a 190lph will keep up with a 20G running lots of boost. Would prolly have to runa crazy high base fuel pressure, and even then, the stock FPR wouldn't be able to handle it. Just get aWalbro 255lph if yo ugo 20G.

 

[LandoAWD]

Originally posted by qwkdsm2
i was just wondering if i could use a 190lph for the 20g .....i'll upgrade later though....also tell me all i need to run 20g on my stock 1g awd eclispe....tell me the parts i need and you guys recommend i get first

Long way before the 20g with those mods. Minimum...wisemen step in if you disagree...550s, fuel control, intercooler upgrade, logger, upper ic pipe/ w throttle body, bigger pump.

 

[SoCaliEclipse]

Originally posted by LandoAWD


Long way before the 20g with those mods. Minimum...wisemen step in if you disagree...550s, fuel control, intercooler upgrade, logger, upper ic pipe/ w throttle body, bigger pump.

Def some intake and a full exhaust system. You need a 3" setup to flow enough air for that turbo. Either get an external gate, or run an external dump on an internal gate. I dont have injectors right now and it runs fine, however i am upgrading soon. Also, a 190lph pump will be good to about 19psi. RRE says that the 255lph is preferable for any upgraded turbo. But the 190 will sufice in the mean time. Not really a big need for TB, it always helps, but isnt necessary for it. Also it looked like you already have a 1G, so you have a bigger one to start with. Intercooler upgrade is preferable as well (even though i havent picked up my griffin core yet , its also a good idea to have upgraded ignition wires and plugs (if you dont already) to help spark the extra fuel you are going to be supplying. One more thing is any type of dual stage boost controller. I love my profec-b, however i ran my RRE MBC a few times just to see how it did and i wasnt very happy with it. It took too long to open, so i got spike (I have NONE with the profec) and also I either spun way too much in first or underboosted in the other gears. I now run 10psi in first and 15 in all the other gears. When i get my injectors and intercooler (hopefully within 2 months) I will run 10psi and 20psi, respectively. Dont forget a clutch (and flywheel while you are at it) to put that power down. This is a mojaroly overlooked mod and it can really help you take advantage of your new turbo. I would now refer you to the sites' "tuning guide". It has been a major help to me in deciding what order to buy my stuff, it is very well thought out You will want to go for the full stage 2 setup, but you dont necessarily have to make the turbo your last thing that you get. I love my 20G and I highly recommend it.

PM me if you have any parts questions, as i have done WAAAY to much research for everything that I have bought. Good luck on your project!

Regards,
Brian

 

[ILOSE]

I'd say check all the tuning guides from various vendors and get an idea of what you need. Compile a list and go from there.

BTW: what unit are you with at FT. Stewart. I was with Bco 3/7Infantry.
11B20B4