Missing Bolt on Wastegate, Question

[Spanky_DSM]

my t 25 was blown and I had a parts car gsx so I pulled the turbo 18g and installed it.
Fixed all the leaks today.
Still laggy...
Pulled the wastegate line off still laggy...
No exhaust leaks I should be worried about...

But I have noticed the the bolt holding the head of the wastegate aculator is missing the bolt that holds it to the inlet turbo hosing.

If I try to put a bolt in it wont go thru as half of the threads are covered because the mounting hole is crooked. (I hope you guys understand this)

Half throttle builds about 3-5psi, but full throttle it runs 15psi steady.

Please tell me that this missing bolt holding the aculator in place is keeping the wastegate partially open causing the slow boost increase.

heres the best pic I could take. (laptop) Ill post more later once I get my camera charged.



I DID A AMATURE SKETCH THO TO HELP UNDERSTAND

The red is the Threaded hole where the aculator mounts up to and how it is on my car right now.

 

[mb3000]

If your actuator is not bolted down tight than yes, your flapper is probably open.

 

[Colt4G63 also]

I doubt the missing bolt would cause slow spoolup. It looks to me like the remaining bolt is holding the actuator in place.

Maybe though.

Either way, you should just loosen the other bolt, move the actuator, and put the other bolt in. Then tighten them both.

 

[Spanky_DSM]

i didnt know there was another bolt because i tried pushing it down into place and it wouldnt budge. ill try and find it and loosen it to put it in place.

And colt4g63 (not to sidetrack) i think i saw your car on a dsmautox vid. looked just like your defaut pic but in video.

Thanks guys!

 

[Colt4G63 also]

Yeah I nabbed that still from the video.
[ame]http://www.youtube.com/watch?v=-Tbzv9kcyFo[/ame]

Took second in Max effort in 2012.

 

[Spanky_DSM]

Sweet ride. Im jealous!

Ill post up tomorrow a update on how the boost issue goes after i put the aculator in check!

 

[Colt4G63 also]

Thank you. Your car is pretty nice too. Any non rusted, AWD, pre-96 DSM is like a rare gem here in NY. Not only because rust is a real issue up here, but 96 and later are subject to a "readiness monitor" emissions test every year.

 

[Spanky_DSM]

yeah i went to go see a 96 gsx and that thing had cancer up the A! strut towers, doors.. i bailed instantly.

Im trying to find your build thread but my internet doesnt open up your page for some reason.

 

[Colt4G63 also]

I didn't think you guys had rust in Texas. I have a few build threads over on 4G61t.org.

 

[Spanky_DSM]

iThe car i looked at came from Colorado. Had a Blown motor, but the guy made it seem like a good deal til i saw it. rattle can paint, euro lights and oil on all the engine parts.

And yeah im subscribed to that forum. I was gonna buy a colt but the guy ended up keeping it so im just taking up space on 4g61forum

 

[JusMX141]

You went from a T25 to an 18G. It's going to be laggy.

I think you're trying to fix something that's not broken. Loosen the other bolt on the actuator mounting bracket, then dig through your bolt collection and find an 8mm x 1.25 x 16 or 20mm bolt and thread it in there- tighten them both, then the missing bolt problem will be solved.

 

[Spanky_DSM]

yes!! i know the 18g is going to be laggy! but you have no idea how bad my lag is! its horrible. I know i shouldnt have to give it full throttle to build boost.

3/4ths throttle and its still laggy.
Been in 20g turbo cars and its not as bad as what im going thru.

 

[JusMX141]

Say you put the car in third gear on flat ground, cruising at 35-40mph, and you shove your foot to the floor. Does the turbo respond immediately? What boost level would you see full boost if you'd do this?

 

[Colt4G63 also]

If you only go part throttle, your BOV may be opening, and modulating the amount of boost you see. Is the EVO8 valve any different than the stock 2g piece?

 

[Spanky_DSM]

it doesnt respond at all.

i have a mechanical boost gauge.
being on the freeway 3gear/4th pull

full throttle is the only thing that kicks in full boost but it doesnt pull as well as 1st gear being in full boost.

1st gear in full boost is the only time the car pull hard.

other than that if feels like it sputters or feels like i have a massive huge leak but i dont.

did a boost leak today and it held nice.

 

[Colt4G63 also]

If it sputters, try new plugs.

 

[Spanky_DSM]

Im running new Ngk br6es or how they go by.

Do spark plug wires have a huge effect? im running autozone ones but swapped with my pal and ran the same.(dont know his brand)

My car kills alot of gas tho, and i swapped o2 sensors as well thinking it was the o2 sensor throwing off my fuel trim but same problem as well.

gas mileage is bad tho. it horrible.

 

[Colt4G63 also]

Plus wires do matter a lot. The NGK ones work/look great and only cost about $30.

O2 sensors are important too, but under boost the ECU ignores them.

Ps. It's pretty normal for first gear to feel like it pulls harder. The gearing multiplies the torque outputted to the wheels.

 

[Spanky_DSM]

alright heres the full story.
traded my 420a for a misfiring 4g63 awd.
drove the current talon 90 miles to my house.
(didnt waste almost any gas)

pulled the plugs and there was a bad broken spark plug
may i say the car pulled nice and pulled.

did maitnance:
New fuel filter (changed recently)
wires (autozone)
spark plugs (new and current NGK)
O2 sensor
Oil
Intake mani gasket (probably leaking at the time, but not any more)

And the gas mileage went down with the power.
a year later and still, (might be the wategate on the 18g, i hope) the t 25 was going bad, so the 18g replace it but hopefully had its problems as well(wastegate, easy fix)


it currently runs fine..

My only current problem is that it doesnt build boost quick.
thats why i assumed it might be the wastegate.

 

[xxNocturnalxx]

Not sure if your turbo is different but on my 20g the wastegate bolts went all the way through the compressor housing, I found out the hard way after switching to an external gate and wondered why it was so laggy

 

[Colt4G63 also]

Ha ha ha, Wouldn't that be something. Of course a boost leak test at the compressor inlet would reveal that.

 

[xxNocturnalxx]

When I did the test it was actually hard to locate because it was loosing so much air so fast I could hardly hear it, when I found it I was like wow I'm fail I then spaced the fasteners with some washers and had to pipe tape the threads to rid the leak completely. But since the BLT held nice for you then you're good. Even still, putting a bolt in that missing spot is the best thing you can do at the moment.

 

[Spanky_DSM]

If you only go part throttle, your BOV may be opening, and modulating the amount of boost you see. Is the EVO8 valve any different than the stock 2g piece?

I missed this post last night for some reason! ive wondered that myself because on occacionally ive noticed a boost leak type sound but found none upon testing. I have a 1g bov laying around. I'll swap it in a bit, and try and get the wastegate aligned.

thanks

 

[Spanky_DSM]

update:

Connected the wastegate and still felt the same. I know I am running rich tho.