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Old 07-30-2006, 11:31 AM   #1
Assassin4457
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Default 18G Spool Characteristics...

Could the 18G users please give me some information about how fast the turbo spools ? Im on the fence between a 16G and an 18G because I learning the 18 can hit 300whp with relative ease and the 16 is being pushed at that point. I have searched about it, but as you can imagine there are hundreds of threads that are 18G related, and it would take me 19 years to find what im asking.

just 2 quick questions...

1. When does your turbo kick in ? (I know it has to do with proper tuning, but whats the best you know of ? )

2. Can the stock 2004 wrx motor take that kind of a turbo and still be streetable and reliable ? (with low boost map tuned for example? )

Any info related to this would be apreciated.
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Old 07-30-2006, 12:20 PM   #2
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18g Do it!No questions about it.I was in the same boat as you.Had a VF34 for some time then I just wanted more.I was looking at the EvoIII16g or the 18g.I didn't want to much lag.Many people that I talked to said just get the 18g now and be done with it.So I got the 18g from http://www.blouchturbo.com/ Great price.I never looked back.Love it.
Boost kicks in around 3800.Between my VF34 with a COBB stg 2.5 OTS Map and my Protuned 18g I don't even feel the diffence in lag between the two.That's what a good tune will do.Right now the boost is set at 17psi.My turner said run it a month then come back if you want to raise it 19psi.I wouldn't go more than that.19psi is what most people run,to be safe.Your 2.0l will be fine with a good tune and not driving like an a$$hat.Do it right the first time.Go with the 18g.Good luck.

My setup is 18g with modded injectors,and aftermarket TMIC.
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Old 07-30-2006, 12:41 PM   #3
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I can't wait to go 18G too, I ordred my FMIC for the project yesterday (18G, Helix 820cc inj., Walborogh Fuel Pump, FMIC and Protune)
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Old 07-30-2006, 12:48 PM   #4
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I've got a 20g from slowboy. It spools pretty well. It comes on at around 3200 and full boost 21psi(92 oct) 27(psi 110 octane). definately later than my vf30 but it is still fun to drive. I have modded stocks, txs topmount and other little stuff. Put down 347 whp and 320 tq on 110. stock engine and trans. Still going strong for over 6k miles. I have 37k on my car.

You definately have to be in the mood to drive fast and just stay in a lower gear. I still have not figured how to launch. I ran a 13.2 at 108 with a 2.5 sixty foot.

It's kinda funny a stage 2 pulls me from a dead stop but at 40 i run away!
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Old 07-30-2006, 03:10 PM   #5
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My 18G spooled the same as my VF30.
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Old 07-30-2006, 03:28 PM   #6
Assassin4457
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How will my motor hold up to it? I understand that everything is in the hands of tuning, but for a daily driver still trying to be reliable, 16G or 18 ? I mean the 18 is alot of air going in, im curious how long my motor would work for me before needing a rebuild?

Also how does it compare to a deadbolt TD05H 16G with the monster P&P ?
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Old 07-30-2006, 03:52 PM   #7
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iirc ive seen that the ej205 is good to about ~400whp on stock internals. the biggest thing that will hold you back putting down that sort of power is not the engine but when will your tranny decide to go out...
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Old 07-30-2006, 04:03 PM   #8
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yeah we have to worry about the tranny over the engines even though the first thought is internals.. All I can say is save for some PPG gears so when the time does come that it does decide to give out your not left taking the train
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Old 07-30-2006, 04:09 PM   #9
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PPG gears ? I've never really ventured into tranny territory, althought I knew that I needed an upgraded clutch for sure.

PPG Gears what are they ? Syncro or Dog Cut ? (remember im trying to keep it streetable) Where can I find them / read about them ?

BTW Thanks for all the info, you guys are GREAT!

Never mind! i think I found it. its on www.ppggearbox.com.au right ?

Last edited by Assassin4457; 07-30-2006 at 04:15 PM.
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Old 07-31-2006, 12:38 AM   #10
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Get the 18g.The tranny is going to be fine as long as you dont bash it all the time. the motor will hold up just fine also. I have seen the greddy 18g and sti pinks on my friends car last over 100kmiles he is mostley on the freeway not to much drag racing. Just a nice street setup.
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Old 07-31-2006, 04:28 AM   #11
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so should i go with an 18g or a big 16g?
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Old 07-31-2006, 09:01 AM   #12
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Quote:
Originally Posted by 99subi
so should i go with an 18g or a big 16g?
Hello have you been reading the posts, 18g JK
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Old 07-31-2006, 09:50 AM   #13
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My 18G'd '04 WRX hits max boost at about 3,750 rpm. Lag is a touch annoying at times, but definetely something you can live with. I'd highly recommend a GM BCS.

Not sure what the rest of your mods are, but if your goal is just 300whp, then I'd go for the EVOIII 16G. Same power level (though I do not know how well it holds power in the 6,000+ rpm range) and better spool. No reason to buy a laggier turbo to make the same power with a narrower power band.

Your motor will be just fine at that power level. The motors seem to be good for up to 400 whp. Reliability aside, the heads cannot flow enough to support over 400 whp.
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Old 07-31-2006, 11:10 AM   #14
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Is lag better then a stock (pre-06) WRX or worse with the 18G + Protune...

what do you 18g'ed owners think?
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Old 07-31-2006, 12:57 PM   #15
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Dont know about you guys i might be coming into some extra cash (UPS foulup) was getting all hyped on the 18g becuase of the good tunes some of you are getting.

One thing to keep in mind a 18g will not hold its spool down like the 16g series im staying with a super16g or maybe a EVOIII if i have to buy another turbo.

>>To the guys with the slow spooling vf34s something is wrong with your tunes ive been looking over other peoples setups for over a year now. You should not have started spooling after 3400/3500 rpms anything else is just to damn high.

FTW super16/evo3 for lots of low end and a huge chunk of the 18g top end. < so ill get walked by a 18g.
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Old 07-31-2006, 01:00 PM   #16
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Quote:
Originally Posted by amukaoen
Is lag better then a stock (pre-06) WRX or worse with the 18G + Protune...

what do you 18g'ed owners think?
Are you asking if lag is worse then the stock turbo?

Yes it is...

I get 17.5psi at 3700rpms

22psi at 4200rpms

This is all with a leak at the Intake manifold.... So spool should get a little better once I fix that.
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Old 07-31-2006, 01:02 PM   #17
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If these turbos where boxers mitsu turbos of course.

Small 16g Featherweight
Big 16g Lightweight
Evo3-Super16g Middleweight
18g Welter weight

Heavyweight -anything to big i guess.
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Old 07-31-2006, 02:41 PM   #18
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An 18G basically makes any 16G or "BIG, Evo, ...etc" look extremely silly
They don't even compare and the 18G's spool up is the same as my vf34's....early and quick rising. Again, it's all about that tune
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Old 07-31-2006, 02:59 PM   #19
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Quote:
Originally Posted by gcm05
An 18G basically makes any 16G or "BIG, Evo, ...etc" look extremely silly
They don't even compare and the 18G's spool up is the same as my vf34's....early and quick rising. Again, it's all about that tune
What is early?

So the vf34 should start at about 3400 so your 18g spools at about the same time?
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Old 07-31-2006, 03:15 PM   #20
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sigh, the naive who buy a evo 3 16g over a 18g due to "spool"
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Old 07-31-2006, 03:40 PM   #21
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Quote:
Originally Posted by Magnum626
What is early?

So the vf34 should start at about 3400 so your 18g spools at about the same time?
yeah except it's actually closer to 3300
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Old 07-31-2006, 03:41 PM   #22
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Quote:
Originally Posted by gcm05
An 18G basically makes any 16G or "BIG, Evo, ...etc" look extremely silly
They don't even compare and the 18G's spool up is the same as my vf34's....early and quick rising. Again, it's all about that tune
A super 16g is very close to a 18g and the fact that it will stay boosting in short stop and go distances is a silly reason to compare.

AutoX for example cuase i dont autoX your going to have a heck of a time keeping in boost even with a 3500rpm boosted 18g i dont think anybody here can say its possible to stay boosted in tight stop and go situations.

Ive even read vf34s that have been used to autoX only thing holding them back was maybe a second or two they wanted to get back in boost.


Im not hating
i just want more of instant boost thats why theres so many choices and theres a huge i mean huge 18g bandwagon here or most other sites.
Even if some of those 18gs out there are only making 305hp or or so and a EVO3 can hit 300hp im not afraid to say id rather have some low end fun away from open roads they 18g shines its hardest.
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Old 07-31-2006, 03:56 PM   #23
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Quote:
Originally Posted by gcm05
An 18G basically makes any 16G or "BIG, Evo, ...etc" look extremely silly
They don't even compare and the 18G's spool up is the same as my vf34's....early and quick rising. Again, it's all about that tune
Not to argue (much ), but I do not see how an 18G spools as quickly as a VF34 if both are tuned properly. Boost response would not be the same, either, I'd suppose.

Do you mean that you start to see positive boost at the same rpm? We should be more concerned with the torque curve, anyway. Asking when something spools is not a good question as it is too vague and, ultimately, unimportant.
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Old 07-31-2006, 04:06 PM   #24
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well see the vf34 was APed as where my 18G is dyno tuned with a meth kit
haha ....sorry that's my little secret I forgot to throw out there
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Old 07-31-2006, 04:13 PM   #25
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Quote:
Originally Posted by gcm05
well see the vf34 was APed as where my 18G is dyno tuned with a meth kit
haha ....sorry that's my little secret I forgot to throw out there

So you are claiming to get fullboost at the same time on the 18g as you did on the vf34? Post a dyno plot/Logs cause I am ready to raise the BS flag.
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