Clicking under sustained boost

[Spec7]

OK- Specs 1st:
Stock SR20det w/SMIC & HKS Super Suction kit.
Stock everything else
Issue:
Turbo spools up cleanly and boosts, but if you stay on the throttle for more than 2 or 3 seconds, there is a rapid clicking noise that sounds sort of like a card in bicycle spokes.

What do I need to be searching for in the threads that would help me out most? "Sounds" doesn't get ya too far and BOV, wastegate, or detonation gets lots of useless threads.

Thanks in advance

[gotparts?]

sounds like the boost soleniod to me.

[spawnofsatan]

Sound like your car is pinging(Detonating). Play with the timing. Try higher octane petrol, or less boost. (Not good :naughty: ) Higher octane petrol will solve this if it is pinging. Aviation or racing fuel is best or ad Taulene. Not sure on how much though... if it doesn't solve it try less boost or try water injection. Anyone else?

[Maeda]

NOS Octane+ works.

It sounds like it could be rod knock.

[supportTHEezln]

I second the ping. But then again, I always thought of pinging as having rocks in a coffee can. But that's just me.

[Spec7]

I'm running 92 octane plus an octane booster that should even it out around 100-104 octane. It did this prior to using the octane booster as well. Its running at stock boost, I do not have a boost controller.

As far as rod knock, I believe that would be occuring throughout all rpms as well as at idle. It only makes this noise under the previously mentioned conditions, this is boost specific as best I can tell. :-/

Would a wastgate make any noises if it were going bad?

[neverlift]

what is your timing set at

[IAM_SO_sLOw]

i think the sound your describing is like the sound my car is making... lol my car makes that sound too...i was thinking its a gasket around the exhaust manifold or somewhere along the downpipe

[Spec7]

Timing is stock, never been touched as far as I know.

[neverlift]

get the gun out and check it,then we will know more to wether this is ping or not

[Spec7]

hmm, ok. Never done that before, nor do I own a timing gun. Advance auto is just down the road though.

[g6civcx]

Have you ever rebuilt the turbo gasket? If not then my money is on that. The exhaust leak makes it sound like a ticking noise.

[Spec7]

I have done absolutely nothing to it. I am in the process of checking everything out on the car to make sure everything is 100% before I start the power mods.

[smithers584]

ok dude i think gotparts? is right. i think that you are talking about your boost solenoid. do you have a boost controller? i know that the solenoid from my apexi avcr does the same, its the valve fluttering inside. sounds exactly like what you are talking about. called apexi about it, they said some do it and some dont, so i am not worried about it. its just fluttering back and forth trying to maintain proper boost.

[IAM_SO_sLOw]

Have you ever rebuilt the turbo gasket? If not then my money is on that. The exhaust leak makes it sound like a ticking noise.

spec7 this is what i think is... im going to check mine this week...i suggest you check yours too =) i doubt its your timming...because i thought i checked my timing and changed it to 15 and it still made the sound..

[Spec7]

Agreed, makes the most sense to me as well.

[sepulchral]

bump having same prob

[g6civcx]

Rebuild your turbo gaskets.

[drifter808]

i had same problems and the turbo gasket from the manifold to turbo was missing a bolt and loose and the gasket from the 02 housing to turbo was missing all bolts except for 2. replaced them all and now runs cherry

[Spec7]

Yup, I took everything off today; exhaust mani to the cat. Blown manifold to turbo gasket, missing nuts on the dump tube and turbo/manifold, exhaust manifold was not torqued evenly so the head to manifold gasket was seized to the head on one end and nearly fell off on cylinder 4.
I hate those oil and coolant lines; much flesh and blood is missing due to them.

I had a small line of oil on the outside of the cool turbine. Should I go ahead and rebuild the turbo while its out?

[misfitsfreak81]

yes rebuild it while its out or good time for upgrade. the rebuild is super easy and you can find a complete kit on ebay for less than 80$.

[Spec7]

Here's the mani-turbo gasket :
http://i33.photobucket.com/albums/d90/Fijigrad/240sx/DSCN0375.jpg

Here's the Exhaust mani gasket:
http://i33.photobucket.com/albums/d90/Fijigrad/240sx/DSCN0376.jpg]

Encouraging isn't it??

[Spec7]

After all the searching and posting this thread, I run across this one today which is exactly the same issue:

http://www.zilvia.net/f/showthread.php?t=120510&highlight=turbo+rebuild

[silverarrow27]

I'm running 92 octane plus an octane booster that should even it out around 100-104 octane. It did this prior to using the octane booster as well. Its running at stock boost, I do not have a boost controller.

As far as rod knock, I believe that would be occuring throughout all rpms as well as at idle. It only makes this noise under the previously mentioned conditions, this is boost specific as best I can tell. :-/

Would a wastgate make any noises if it were going bad?

This bothered me, running 92 octane and a bottle of octane booster does not even out at around 100-104 octane. A bottle of octane booster only adds additional points so if you're running 92 octane + octane booster = 92.5 or something like that only.

Now if you went half tank of 92 and half tank of C16 then you're looking at high 90s octane.

[Spec7]

Interesting. I know very little about about that stuff. Good to know though.

[silverarrow27]

Don't waste your money away on those octane boosters...do you no good. I've ran 89 octane on my old cars before and never had any issues, your problem lies elsewhere so save your money.