18g turbo

[1995 gst]

I was woundering when do i start getting boost on an 18g and when does it get full boost? both rpm wise, im trying to figure out whats the best turbo to go and i dont like to redline or get to close to it.

 

[95tsiemad]

i get full boost 21lbs around 4300 i think its laggy

 

[Bud92gsx]

Damm big turbos are laggy..

 

[JusMX141]

An 18G has an inducer that is 1/10th of an inch larger than an Evo III 16G....and that's the only difference. Theoretically you should hardly notice a difference in spool between a Big 16G and a TD05H 18G. If you're not reaching full boost until 4300 on a turbo with a stock-sized turbine wheel, something is horribly wrong.

 

[1995 gst]

i did the 14b swap on my 2g and i only start getting boost at 3600 and get full boost at 4500 at 15psi, something must be wrong?

 

[deviousgst]

most likely somethings is wrong. i get full boost at around 3600 on a e3 16g

 

[RadDsm]

i did the 14b swap on my 2g and i only start getting boost at 3600 and get full boost at 4500 at 15psi, something must be wrong?

Yes. Check for boost leaks, pre turbine exhaust leaks, and check to make sure the wastegate flapper is sealing completely.

 

[empie1]

i did the 14b swap on my 2g and i only start getting boost at 3600 and get full boost at 4500 at 15psi, something must be wrong?

most likely somethings is wrong. i get full boost at around 3600 on a e3 16g

I got full boost with a fmic, 264s and a 16g by 3100..you both got some leaks.

 

[1995 gst]

My cars boost controller has a hole in it and the guy i bough it from said its supost to be that way. is it true?

 

[sniver]

My cars boost controller has a hole in it and the guy i bough it from said its supost to be that way. is it true?

It should have a 1/32 inch hole next to the nipple going to the waste gate on the mbc.

Sent from my Droid

 

[1995 gst]

so its supost to have a hole leaking out?

 

[DSMTyson]

so its supost to have a hole leaking out?

No. It should have a 2 nipples(with holes for the air to go through) with a vacuum hose attatched to each one. One hose should be attatched to the intake manifold, and the other should be going to the nipple in the wastegate actuator.

Take a pic and show us this "hole" you are speaking of.

 

[1995 gst]

I know theres supost to be these 2 lines in and out so the boost controll will do its this but theres just a random hole in the controller which the guy from the performance shop near me said its to leak out air so the ecu thinks its not getting enough air. just a random hole.

 

[95tsiemad]

An 18G has an inducer that is 1/10th of an inch larger than an Evo III 16G....and that's the only difference. Theoretically you should hardly notice a difference in spool between a Big 16G and a TD05H 18G. If you're not reaching full boost until 4300 on a turbo with a stock-sized turbine wheel, something is horribly wrong.

I have Greddy 18g I have little boost leak and leak from my wastegate off the manifold

 

[sniver]

No. It should have a 2 nipples(with holes for the air to go through) with a vacuum hose attatched to each one. One hose should be attatched to the intake manifold, and the other should be going to the nipple in the wastegate actuator.

Take a pic and show us this "hole" you are speaking of.

Here's what he's talking about. The answer is yes, it should have one tiny bleed port hole.

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Note the bleed hole can be on the body, or at the nipple going to the wastegate. In this case the wastegate nipple is the vertical facing one. Holes are essential to operation, without one, the wastegate would get pressure once and never close again.

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another "hole" shot.

 

[1995 gst]

Thank you very much, i was only woundering because it makes this really loud noise when i boost up because so much air is coming out. and when i put my finger over it i can feel the air, thank you very much for ## help.