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Old 03-07-2012, 05:10 AM   #126
nappingcub
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Quote:
Originally Posted by Maxwell Power View Post
Blouch says even though the compressor is the same, the larger turbine is giving them another 15-20whp.
So if the 18G-XTR is slower to spool, but provides more power than an 18G-XT, how does it compare to the 20G-XTR and 20G-XT?
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Old 03-07-2012, 11:46 AM   #127
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^+1 FYI specs:

18G-XT --> 43lbs/min (430HP) / XXmm turbine??
20G-XTR --> 44 lbs/min (440HP) / 56.5mm turbine
20G-XT --> 47 lbs/min (470HP) / 62mm turbine
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Old 03-07-2012, 12:07 PM   #128
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Quote:
Originally Posted by V8 GTFO Lesbic WGN View Post
^+1 FYI specs:

18G-XT --> 43lbs/min (430HP) / XXmm turbine??
20G-XTR --> 44 lbs/min (440HP) / 56.5mm turbine
20G-XT --> 47 lbs/min (470HP) / 62mm turbine
To elaborate:

18G-XT --> 43 lbs/min compressor + XX turbine (smaller than 56.5mm) = ~430 HP
18G-XTR --> 43 lbs/min compressor + 56.5mm turbine = ?? HP
20G-XTR --> 47 lbs/min compressor + 56.5mm turbine = 440 HP
20G-XT --> 47 lbs/min compressor + XX turbine (larger than 56.5mm) = 470 HP
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Old 03-07-2012, 12:45 PM   #129
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Quote:
Originally Posted by WMCCook29 View Post
To elaborate:

18G-XT --> 43 lbs/min compressor + XX turbine (smaller than 56.5mm) = ~430 HP
18G-XTR --> 43 lbs/min compressor + 56.5mm turbine = ?? HP
20G-XTR --> 47 lbs/min compressor + 56.5mm turbine = 440 HP
20G-XT --> 47 lbs/min compressor + XX turbine (larger than 56.5mm) = 470 HP
Well, those are the official blouch specs, but I was wondering more of what MPS real life experience with the turbos are. For example, Dom said that while they officially have the same lbs/min for the 18G-XT and 18G-XTR he found that the XTR spooled slower, but made a bit more power. Pretty much trying to get a rough hierarchy of power and spool.
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Old 03-07-2012, 01:06 PM   #130
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Although purely speculation based on these specs, I would say that the order of power & spool are as listed (power = low-high, spool = fast-slow). For a given compressor wheel, the one with a smaller turbine should spool faster, but make less power than one with a larger tubrine. This is what you see with the 20G-XTR vs. XT and is confirmed by MPS's post about the 18G-XT vs. XTR.
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Old 03-12-2012, 07:23 PM   #131
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Originally Posted by djc1827 View Post
1/4 mile isn't all I care about but dyno numbers isn't all I care about either. Plenty of guys out there who can go fast too, Im just saying if I upgrade my turbo, I want to go faster not just have a better dyno sheet. Turbo 1200-1800$, retune 400-600$. I am here for one purpose only which is to change peoples minds about stock turbos. If you go big turbo, you minds well rebuild your block and upgrade your trans if you have 5 speed. Now your talking 5-10k but at least you can go fast...18g/20g waste of money in my opinion

Venders will hate me but until someone goes down the track and shows a good timeslip and proves me wrong...I stand by my word

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Old 03-14-2012, 01:16 PM   #132
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Bump it for some 18G XTR graphs. There have to be people that have bought them on here somewhere.

I know one guy that will get his done in the next month or so, I'll try to make sure he gets a plot on here.
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Old 03-14-2012, 02:17 PM   #133
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Is the size of the 18G-XT turbine wheel same as 18G-XTR (56.5mm).
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Old 03-14-2012, 02:51 PM   #134
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Quote:
Originally Posted by V8 GTFO Lesbic WGN View Post
Is the size of the 18G-XT turbine wheel same as 18G-XTR (56.5mm).

no... as stated before.

EDIT:
also, the diameter isn't the only thing that matters. The profile of the blades, the number of blades, the ratio from inducer to exducer (trim) and the weight of the turbine all play big factors in the amount of torque created by the turbine.
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Old 03-14-2012, 03:24 PM   #135
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so in your book: 18G-XT > 18G-XTR?
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Old 03-14-2012, 05:05 PM   #136
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Quote:
Originally Posted by V8 GTFO Lesbic WGN View Post
so in your book: 18G-XT > 18G-XTR?
yes and no. I honestly don't feel there is really a place for the 18G-XTR.

As I see it, from my experience with these turbos, this is the approx hp of each of them:

18G-XT 430 (by blouch's site, and my experience show it's accurate)
18G-XTR 445 (by comparing results and communicating with Blouch)
20G-XTR 455 (by communicating with Blouch and my experience with the regular 20GXT)
20G-XT 470 (by blouch's site, but I think it's under rated because I have seen AMAZING power from this turbo that trumps the original FP Green)

So what we're seeing is that the 18G-XTR is for people who want the reliability of a ball bearing turbo without the need for the HP of a 20G. I have a customer here with the 18GXT-R and I feel it is too laggy for the size of the turbo.

I honestly feel this thread has gone on way too long and I don't understand why you guys just don't pick a ****ing turbo already.
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Old 03-14-2012, 05:20 PM   #137
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^ Because the information at Blouch site SUCKS !!!! They should have efficiency curves and spec sheets etc for us to make an informed ****ing decision. They should scale down the number of turbo offerings or at least point out the pros and cons of each gaddamit.
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Old 03-14-2012, 05:29 PM   #138
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Originally Posted by V8 GTFO Lesbic WGN View Post
^ Because the information at Blouch site SUCKS !!!! They should have efficiency curves and spec sheets etc for us to make an informed ****ing decision. They should scale down the number of turbo offerings or at least point out the pros and cons of each gaddamit.
the small companies like Blouch and Forced Performance can't afford to do such a thing.
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Old 03-14-2012, 05:30 PM   #139
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They should scale down the number of turbo offerings or at least point out the pros and cons of each gaddamit.
That's why you should contact a tuner and let him guide you.
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Old 03-14-2012, 05:35 PM   #140
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Quote:
Originally Posted by Maxwell Power View Post
I honestly feel this thread has gone on way too long and I don't understand why you guys just don't pick a ****ing turbo already.
exactly lol

Just go with the 20G-XT and be done with it.
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Old 03-14-2012, 05:48 PM   #141
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All I am asking the experts like Maxwell is which of these turbos is closer to suit my needs, I don't have a tuner yet in this one horse town.

My wants:
0-60 = low 4s
1/4 mile = low 12s

I have all supporting mods, Spearco, CAI, Injectors, 3" TBE, EWG 38mm, etc.
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Old 03-14-2012, 05:55 PM   #142
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20G-XTR with the TMIC, XT with a FMIC.
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Old 03-14-2012, 06:11 PM   #143
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thx MP, I have a TMIC.

So 20G even with a goal of 0-60 in the low 4s?

We are talking 8cm2 right?

So 20G-XTR 8cm2?
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Old 03-14-2012, 06:27 PM   #144
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Yes 8cm2.
The problem is your goal is a 0-60 of 4 seconds with a 1/4 in the low 12's. This requires power for both, but the 0-60 is hindered by lag for the turbo to come in. So you are going to have to know how to drive this bitch and get a good launch.

I don't think you realize what a good turbo the 20G-XT is. I converted a few 68HTA guys and they all say they are never going back to that crap turbo (68HTA).
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Old 03-14-2012, 06:34 PM   #145
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Any one of those turbos you listed will get you your 0-60 an 1/4 mile goals. It's time to put them all on a dart board, close you eyes and throw a dart. You get whatever you hit and you'll like it.
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Old 03-15-2012, 02:29 PM   #146
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^Well, I guess the decision is between:

18G-XT (as it spools faster than the 18G-XTR)
20G-XTR (per Maxwell recommendation for TMIC).

Between these two options I don't have a dart but Beventure says: 18G-XT
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Old 03-15-2012, 02:59 PM   #147
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I put the 20G-XT in there too and it told me to get the 20G-XT.

Which to choose between those two is up to you... I'd do the 20.

20 makes a lot more power
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Old 03-15-2012, 06:10 PM   #148
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well this is what get when adding the 3rd option 20G-XT:

A really fast and easy tool to make decisions.
Your question: Which Turbo?
Your options:
Option : 18G-XT
Option : 20G-XTR
Option : 20G-XT
Option :

A really fast and easy tool to make decisions.
Which Turbo ?
ANSWER: 20G-XTR
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Old 03-15-2012, 06:42 PM   #149
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I have a 20G-XT 8cm2 with a TMIC and it spools plenty fast for its size. I reached peak torque at 3800-3900 RPM on a road dyno.
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Old 03-15-2012, 06:43 PM   #150
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^do you have a curve? 0-60 in X.Xs? what's a road dyno? VD?
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