t3t4 slow as t25????

[NeXtLeVeL]

sup yall...i recently bought a .50 trim t3t4 that bolted up to my stock 2g eclipse manifold. any ideas why it is so slow? heres whats happening. i dont have a boost gauge or controller because i want to make sure the car is running properly before investing more money. right now the o2 sensor is tightened down hand tight, im missing a exhaust manifold stud, i dont have one of the bolts where the o2 sensor housing meets the turbo, and i dont have my last oxygen sensor in. i dont have a chance to work on it until monday, but im hoping this will help fix some of the problem. any input?

 

[94Jettameowpsst]

First off you def. need to get a boost gauge. Is the turbo actuated or externally gated? I dont know why it would be slow, but if you're not running a MBC, and its actuated, the amt of boost is probably set from 8-12. If its externally gated, if you bought it new, your spring strength regulates ur boost. I could also swear you definitely need injectors or atleast some type of fuel control with a turbo that big.

 

[NeXtLeVeL]

the turbo is internally gated. the actuator arm has a nut that is spinning freely right now. should it be tightened? does it control the spring?

 

[2gredspyder]

the missing stud on the exhaust manifold would create an exhaust leak with in turn wont let your turbo spool like it should. Also you should have left the t25 in there and get the supporting mods for the 50 trim. you should not even drive the car without a boost gauge.
you mentioned that you dont wanna invest more money in the car until its running good, Im afraid it wont run good until you invest more into it in the form of a boost gauge and more supporting mods for that big turbo.
Do your car a favor and get a boost gauge asap.

 

[Eclipsei95cl]

sup yall...i recently bought a .50 trim t3t4 that bolted up to my stock 2g eclipse manifold. any ideas why it is so slow? heres whats happening. i dont have a boost gauge or controller because i want to make sure the car is running properly before investing more money. right now the o2 sensor is tightened down hand tight, im missing a exhaust manifold stud, i dont have one of the bolts where the o2 sensor housing meets the turbo, and i dont have my last oxygen sensor in. i dont have a chance to work on it until monday, but im hoping this will help fix some of the problem. any input?

1. Exhaust leak from your missing stud
2.Well obviously since the 02 isnt plugged in its not gonna run right.
3.50 trim and 0 supporting mods what do you expect? bolt a bigger turbo and be hella fast? sorry aint happening.
4.You are on stock boost settings.
5. Making sure your cars running properly? your gonna need a boost gauge to tell if your running the right boost first of all. you can find a autometer gauge for like 50 bucks.

So to answer your question a t3t4 isnt slower than a t25 its just your car/setup and has nothing to do with the turbo.

 

[PokinatchaPunk]

Ok.....I'll try to restrain my inital reaction of "What the hell are you thinkin" and try and give some useful advice..

Take off the 50trim....
Do some research on the tuning guide. If you are worried about making sure your car running fine before you put anything else on get the precautionary "mods" first.

Egt, Boost, Oil Pressure/Fuel gauges and a Logger

 

[truwarrior]

sup yall...i recently bought a .50 trim t3t4 that bolted up to my stock 2g eclipse manifold. any ideas why it is so slow? heres whats happening. i dont have a boost gauge or controller because i want to make sure the car is running properly before investing more money. right now the o2 sensor is tightened down hand tight, im missing a exhaust manifold stud, i dont have one of the bolts where the o2 sensor housing meets the turbo, and i dont have my last oxygen sensor in. i dont have a chance to work on it until monday, but im hoping this will help fix some of the problem. any input?

Why didn't you just do a compression test instead of bolting on a turbo?

 

[AL92]

You need a boost guage to see what you got .A broken exhuast stud might slow the turbo a bit slower.A blown turbo to exhuast manifold gasket can loose mega boost.Also did you put that darn turbo ring back in there between the 50 trim and exhuast manifold.I put it in and it broke and went sideways in the exhuast inlet severely messing up spool.You don't use it with the 50trim at least not with mine and I had to get a thick gasket for between the 50 trim and the exhaust manifold.Thinner one blew to pieces when I didn't tighten the turbo to exh man bolts tight enough.
Missing bolt on o2 housing shouldn't do much.that after it builds exhuast.Critical is turbo to exhaust manifold sealing.Back o2 after the cat dont' do nothing for performance.The pre cat o2 is the one that controls the motor.Also with stock injectors as soon as you floor the car you will max them out even likely at very low boost.This will likely give you huge knock retard and take away mega power.
Also if the wastegate rod is not holding the gate closed then you will have next to no boost and boost leaks can also cause very poor performance.
So you need a boost guage.Then you need a bigger fuel pump if yours is still stock,possibly and adjustable fuel pressure reg and bigger injectors like 650s or so.
For now to be safe wouldn't try any boost controller just run the vac line hooked up direct to the 50 trim and that will be minium you can run on that setup.Don't floor the car again until you can monitor your timing as you can't see knock retard directly on a 2g.
You should be pretty safe crusing around at 5 psi or so for now just don't keep your foot in it.The cars do have safety mechanisms like timing retard even though some people on the board will make you think you will blow your engine the second you bolt on a big turbo with no support mods.You will likely hurt your car if you floor it but driving at part throttle on a big turbo can be more than enough until you buy the support mods which aren't that expensive.Pumps are pretty cheap,injectors are a bit pricey but you can usually find some used.afpr is pretty cheap so is boost gauage and dsm scnnmaster or logging software and cheap palm.It not rocket science to run a big turbo at low boost.Its take more tuning skills to get it to run right at higher levels.And you need some way to tune..safc or maft.

With no tuning and fuel support especially you will likely hurt that engine sooner rather than later.

and I can assure you that the big 50 trim will tear you a new one once you get a bigger intercooler and supporting mods.Even at 10psi my 50 trim is fast enough to get a person in trouble quick on winter roads.

 

[Admiral]

You slapped on a 50 trim with no supporting mods? There's a problem...

 

[GSX20]

Fill out your vehicle profile too.

 

[webshell]

what the heck were u thinking putting a 50trim on ur car and expecting to actually be able to use it. the efficiency of it is probably around 3% now. :thumbdown

 

[heavyD]

When I read the initial post I thought it was a joke. But it's not.

 

[boostedinaz]

sup yall...i recently bought a .50 trim t3t4 that bolted up to my stock 2g eclipse manifold. any ideas why it is so slow? heres whats happening. i dont have a boost gauge or controller because i want to make sure the car is running properly before investing more money. right now the o2 sensor is tightened down hand tight, im missing a exhaust manifold stud, i dont have one of the bolts where the o2 sensor housing meets the turbo, and i dont have my last oxygen sensor in. i dont have a chance to work on it until monday, but im hoping this will help fix some of the problem. any input?

Ill be nice about this. Take off the 50 trim and put the T25 back on. Read as many threads as possible and you will see why people are giving you shit. You made a stupid move and will kill your car, get educated first.


Oh, FILL OUT YOUR FU(KING PROFILE

 

[karbon]

I usually think of the T25 as a "slow" turbo too. A turbo about the size of your fist being slow points to other problems You talk about wanting to make sure everything's right before buying a boost gauge but the boost gauge is one of the items that's going to tell you the turbo is running right.

 

[NeXtLeVeL]

thanks for the input, but im not as stupid as i sound...haha. i put the turbo on and just wanted to make sure it ran. yeah i have a boost gauge and i know i dont have enough supporting mods, but all i simply wanted to do is bolt it on and make sure it atleast idled and it was put on right. i have another car so its not like im drivin around in it. im going to install the gauge as soon as i get time, and im going to install another stud and change the ex mani gasket. after that ill be getting all of the supporting mods. what other problems might i be running into installing a turbo for the first time? thank for the help.

 

[NeXtLeVeL]

oh yeh, and this is not my dsmtuner screeen name, so i dont have a profile to fill out..96 gst...skunk 2 coil overs...act clutch and fly...pte .50 trim...type s bov...24r i/c

 

[boostedinaz]

but im not as stupid as i sound...haha.

Ok, so know Ill be blunt.

Yes you are. If you would have spent as much time reading as you did writing this post you would have seen that the setup you have is STUPID. You injectors are way to small for a 50 trim and that will cause you engine to run lean and die. Before you go and say that you will run it at the same boost level as the t25, I will cut you off, and again, tell you that is STUPID. It has nothing to do with pressure, but with volume.

If you do not want to be seen as a stupid person then, like I have suggested in my first post, read and learn. We already have our fair share of people that want to be spoon fed information. Either go out and buy injectors, fuel pump, fuel tunning device, and a logger, or take of the 50 trim. Its that simple.

 

[boostedinaz]

oh yeh, and this is not my dsmtuner screeen name, so i dont have a profile to fill out..96 gst...skunk 2 coil overs...act clutch and fly...pte .50 trim...type s bov...24r i/c

Sign up under your own name. You are not supposed to be using others names.

 

[1993eclipseGS]

You have coil overs a bov and a clutch? haha...

I hope you have a whole fuel system, Full exhaust, Front mount intercooler.. Etc Etc.

That could be a reason why your car is so slow.

 

[oldman]

You have coil overs a bov and a clutch? haha...

I hope you have a whole fuel system, Full exhaust, Front mount intercooler.. Etc Etc.

That could be a reason why your car is so slow.

I'll trade my 16g for your 50 trim, it will be faster in your car even with a blown seal.

 

[AL92]

Man you guys are hard on this guy.Just get a fuel pump some 650 injectors,afpr,maybe a maf translator or safc2 and you can run the 50 trim without an intercooler upgrade for now at minium likely around 10 to 12psi.There is no magic to running a 50trim.Sure at higher boost it gets tricker.You also need a scanmaster or palm logger or laptop logger.

If you do none of the above then sell the 50trim.And if you shop carefully you can likley buy the injectors used,the maf and maft used and even cheap palm to log.I do think it might be possible to run a 50 trim on stock pump and stock injectors at 10psi but wouldn't necessarily want to try it.Still changes are the at that level the engine will just pull timing from being lean and getting knock so engine armaggedon will not necessarily follow.
I have run very high knock counts tuning my 50 trim on occasion.Thats one of the safety systems in the car.I would think with fuel and tuning even at 10psi that 50 trim should feel as strong or stronger than the t28 felt on its best day.

 

[1993eclipseGS]

He NEEDS a full exhaust/injectors/pump/something to control the fuel with.

"I wanted to have a big turbo in my engine bay, So I bought a 50trim even though I dont have the proper supporting mods. Why is my car so slow?" :laugh:

Leaves dsm scene..


"Man those dsms are slow, I had a t3/t4 on my last dsm dawg and my vtech is way strong then that car was. Even if you have a big turbo they're slow" :laugh: :laugh:

 

[boostedinaz]

Man you guys are hard on this guy.

I dont think so at all. If he would take the time to LEARN FOR HIMSLEF he wouldnt have this problem. All this info is out there he just needs to search, but it is easier to just make a post and hope it all falls in your lap then to actually work. If we can discourage this type of probelm then the amount of threads like this will decrease, at least I hope, and it will make the site better.

"I wanted to have a big turbo in my engine bay, So I bought a 50trim even though I dont have the proper supporting mods. Why is my car so slow?" :laugh:

"Man those dsms are slow, I had a t3/t4 on my last dsm dawg and my vtech is way strong then that car was. Even if you have a big turbo they're slow" :laugh: :laugh:

This is another reason. Even though we are one of the best platform for import performance we dont get respect were it is due. Part of it is due to people like this. They strap on a huge turbo and want to be Shep Jr. When there car doesnt perform the way it should they come back and complain about reliabilty or that DSM are capable. This is all due to ignorance that can be toss aside if they would learn for themselves.

 

[prophecymiller]

I will definitely agree with you boostedinaz, I am tired of hearing from under-experienced people who claim that dsm's are not crap and say that any honda or whatever will s%!t all over it. The thing is that you can take a dsm you payed 2k for and put another 4k into it and it will blow the damn doors off of almost anything around for only 6k total! Everyone seems to forget this and they don't realize that the guy down the street maybe has a mustang cobra or an s200 that will run a 12, but he put 10's of thousands into his ride when we could have built our dsm's to perform the same for a tiny amount of what they payed. If you want to do nothing but talk crap about dsm's when you don't know what you are talking about, go to another non-technical site and chat up a storm about things you have no experience with! DSM's all the way!

Steven

 

[MyBeatGSX]

You must be logged in to view this image or video.

Please go buy a simple book about how turbos work or even just basic moding principles...