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Nic19

Stock s14 really laggy?

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Just wondering if anyone has some experience with s14 and the vct system, I'm aware of the common rattle but haven't found anyone with the lag issues in having. Mine might have a slight rattle but the car seems really sluggish down low. Wondering if its the vct solenoid or sprocket that's doing this?

Thanks.

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Found a good thread where a guy found his lag was fixed with new cam gear but his was extremely loud rattle. I think I'll double check the solenoid first.

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I don't think it will be your VCT as they don't really have any effect until around 3k rpm.

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Is your timing at 15 deg?

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My money is on your base timing being a degree or a few out from 15' and second bet is a cracked wastegate seat in your t28 exhaust housing of your turbo.

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Need more information about the 'lag' since it's quite a subjective thing.

 

When do you start making boost? When are you hitting full boost? Is it running stock boost?

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well considering every one uses the term wrong, it is safe to say it takes ages to build boost from a stand still

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Well if I'm rolling along in any gear just low rpm it's takes ages before it will start to take off. Specially notice it when taking off from a stop, in first gear I can hold my foot flat and it won't start to really pull for ages. Feels like my rb25 with the t67 did.

Donny checked the timing and said it was ok. Also had my turbo off to check gaskets and it all seemed fine.

Stock boost stock airbox stock cooler and no boost gauge. Just gotta wire my greddy elec one in.

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I also thought if vtc wasn't working it would still have the same top end power just lacking the bottem end response.

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interested to see what the problem is. i have the same problem too but its only after i went on a cruise and really pushed it. Now under normal acceleration it seems to be a bit slugish as if a vac hose has come loose. Maybe you could check that.

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If it runs shitty straight after a hard boost you've probably pushed a silicone joiner loose, happened to me constantly until i put t-bolt clamps on everything

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Well if I'm rolling along in any gear just low rpm it's takes ages before it will start to take off. Specially notice it when taking off from a stop, in first gear I can hold my foot flat and it won't start to really pull for ages. Feels like my rb25 with the t67 did.

Donny checked the timing and said it was ok. Also had my turbo off to check gaskets and it all seemed fine.

Stock boost stock airbox stock cooler and no boost gauge. Just gotta wire my greddy elec one in.

 

Could be helpful to mention RPM as some people's idea of lag is different to others haha.

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I didn't really take much notice of anything else. The main problem is when I take off in 1st gear from a stop it takes sooo long before it starts to actually get going. I've got no other experience with stock s14s but from the people I've asked they say there should be no lack of power at low rpm.

I've just checked the vtc solenoid and that's working as it should. Is there anyway of checking the gear itself? It's not noisy like the videos I've seen of the vtc though.

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i had turbo off last week and couldnt see any signs of cracks. i took it off to change all gaskets to eliminate that as a problem.

its really annoying just wanna fix it.

im pretty much at the point where it has to be vtc gear or turbo.ill wait till i get the thing driving again and test it out properly

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But it feels sluggish like timings out when it's off boost.

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Did you check the waste gate flap is closing properly? If it isn't closing fully it will cause laggy response.

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Na well initially I thought it was gaskets or vtc setup. Spewin I didn't go right over the turbo when it was off. I've had a turbo with half the rear fins missing and it was just laggy where as this feels sluggish to drive unless I really rev it out.

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if you are just looking at the wastegate.. disconnect the actuator.. get an old shity nokia phone.. stick it up the dump pipe.. and you can get decent photos of the wastegate.. without having to go to heaps of trouble..

 

Ive done it plenty of times but it has to be a candy bar type phone.. not a flip top,,

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