what do you guys think of the greddy 18g turbo? does it hold boost all the way to redline? is it a lot better than the greddy td04 turbo? when would it hit full boost?

TIA

 

anyone???

 

I have an 18G on my stock GSR motor. I've got an AFC/450s, 2.5" DP and 2.25" catback. It makes 7psi by around 3300rpm and holds it all the way to 8000rpm. I made 225/183 running an 11:1 AFR and pulling 1degree of timing per pound of boost.

I'm looking to turn the boost up to 11-12 soon to up the fun factor.

 

anybody else?

 

I'm ruunin the 18g on my ls and lovin it so far. Put down 185whp & 175 torque @6-7psi. Traction is a bitch with stock tires

 

yeah the 18g is nice, what motor are you putting it on?

 

yes it "holds boost" but the turbine starts restricting flow in the top end and i believe thats why it doesnt pull hard all the way to redline like bigger turbos do. you see this as the torque curve drops off as you approach redline even though the boost gauge reads 8psi.

but thats the tradeoff for the early spool.

 

ls motor. i'm getting rid of the single cam turbo i'm using now and getting the 18g turbo. just wondering if it would make a difference.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by falconGSR &raquo;</TD></TR><TR><TD CLASS="quote">yes it "holds boost" but the turbine starts restricting flow in the top end and i believe thats why it doesnt pull hard all the way to redline like bigger turbos do. you see this as the torque curve drops off as you approach redline even though the boost gauge reads 8psi.

but thats the tradeoff for the early spool.</TD></TR></TABLE>

that's true..you can see it in my dyno graph...

 

avex...on what motor was that?? setup?

 

b16a2
9.5:1 compression
Hondata s200b
440cc injectors

 

Avex, How many PSI?

 

15

 

check out all my posts about the greddy 18g turbo......Most people hate badly on them, but I think I made a few people belivers this year...You know who u ******* are...... ian..cough,drew..cough,chris..cough,dj..cough..... ...Did I say I wouldnt mention any names....oops, oh well...

 

i am stickin with the 18g for cost reasons. going to run 10psi on a stock GSR motor once i get the 550s in.

it does spool early. much earlier than that b16a2 dyno with 9:1 pistons.

i am shooting for midrange torque since thats the 18g's strong suit. and since it starts restricting flow near redline, its concentrating a lot of heat in the engine (increased exhaust manifold pressure).

getting peak HP (and lowest possible ETs in the 1/4) out of a particular engine will be left to the big turbos that have big turbines and better flow near redline.

 

I'm a bit baffled by the people saying the 18g's are tiny. The DSM guys says that 18g's are good for up to 400 hp. The people here are saying they drop off in the top end at 250 hp...

I chose a forced performance 18g for my d16. My setup should be ready in 1-2months. I think the 18g will be a great street/daily driven turbo.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Gpelsise &raquo;</TD></TR><TR><TD CLASS="quote">I'm a bit baffled by the people saying the 18g's are tiny. The DSM guys says that 18g's are good for up to 400 hp. </TD></TR></TABLE>

the "18g" is referring to the compressor wheel only. the DSM guys are probably running a different (larger) turbine housing. i am quite sure of it.

which turbine are you going with on your car? the td05h? (which comes in the greddy gsr kit)

 

[QUOTE=Gpelsise]I'm a bit baffled by the people saying the 18g's are tiny.[QUOTE]

here is an old pic of my TD05-18G and T3/T04E 60 trim

 

pretty big difference in size indeed, must take a long time to spool... WHat do you use it for and what kind of setup is it?
I'm not saying that the 18g is the be all/end all of turbos, but I am saying that few people here use them to their maximum potential...

 

well really the size I think can be deceiving. The compressor wheel as you can see is smaller and I'll get a pic up of the turbine differences. . .its night and day how small the TD05's is. Now it is a great turbo and a lot of people get it, put out around 270hp 220tq and call it a day. I havent seen compressor maps for the 18G but it would be nice to see when it starts falling on its face.

 

 

If your setup is done right then your whp will be at a great number&gt;&gt;&gt; that kit made 300whp on a stock type R with standalone...

Good luck with you setup!

 

its still a decently sized turbo! people think its so weany when its not!
the spool up also seems to vary quite a bit more with this turbo. it actually really likes the .2 displacement a lot more than say other t3/t4's.

 

yea you right! now and days most people i know are full boost on these greddy 18gs.... putting out nice #s i was suprised myself on my setup...

 

how does this turbo compare to a garrett t25 from an eclipse?