Over boosting issue.

[Matt1878]

Right, I seem to be boosting more than it should be. The spec of the car is:

NGK HT leads

Blitz nur spec exhaust

Relocated air filter

Tein springs

Autogauge boost gauge

It seems to just keep creeping on full boost from 0.6 to like 0.85 at which point my engine light comes on. I checked this in 4th as I still have standard mani on.

What could cause this and what are the solutions?

[funny onion]

combination of free flowing exhaust and relocated filter mean you have a better flow of air, which will cause it to creep. the standard actuators are weak (and getting on abit now) so are likely to allow the boost to spike over standard boost. best bet is to get a hks actuator on it, and set it to 0.6 bar for now until you have fueling mods to support higher boost levels.

[Matt1878]

combination of free flowing exhaust and relocated filter mean you have a better flow of air, which will cause it to creep. the standard actuators are weak (and getting on abit now) so are likely to allow the boost to spike over standard boost. best bet is to get a hks actuator on it, and set it to 0.6 bar for now until you have fueling mods to support higher boost levels.

I have a blitz decat ready to go on as soon as I can find a new manifold. So ill be looking to buy a HKS actuator anyways

Thanks

[funny onion]

cool the blitz decats are awesome, i've got a wepr power up externally gated manifold on mine, awesome ct9 set up! just don't buy a toyosports manifold lol.

[Matt1878]

cool the blitz decats are awesome, i've got a wepr power up externally gated manifold on mine, awesome ct9 set up! just don't buy a toyosports manifold lol.

haha I wont be dont worry!! dont fancy it cracking

I want a wepr or race-tech mani tbh.

[funny onion]

someone on tgtt was selling the same mani as mine, you should have a look, it's an awesome manifold!

[Matt1878]

Any chance of a link ;)? I dont use TGTT

[funny onion]

i'll have a look now lol...

[Matt1878]

i'll have a look now lol...

Cheers

[funny onion]

just had a look and found it, was brand new including manifold, decat and oil feeds for £190, right bargain :/

[Matt1878]

That is cheap Shame I already have a decat. I wanted the blitz decat from the start though.

[funny onion]

the wepr power up kit has a shorted decat because the turbo sits a fair bit lower, but tbf i have a jperformance decat mounted to it and have had no issues at all so far. also the wepr decat has a screamer that mounts to the external wastegate, looks awesome haha.

[Matt1878]

the wepr power up kit has a shorted decat because the turbo sits a fair bit lower, but tbf i have a jperformance decat mounted to it and have had no issues at all so far. also the wepr decat has a screamer that mounts to the external wastegate, looks awesome haha.

Sounds awesome, what are the advantages and disadvantages of a screamer?

[funny onion]

well there are two "types" of screamer. there's a decat/screamer that a fair few people have. personally think these are pretty crap, they tend to blow on idle but the intention is that when the wastegate on the turbo opens it divorces the excess gases from the exhaust allowing them to escape easier/quicker. the screamer i was talking about is the one you would bolt onto an external wastegate, when you reach the spring pressure in the wastegate (in my case 0.8 bar) the wastegate opens, allowing the excess gases (which in your case are causing the overboosting) to escape via the screamer pipe. the screamer pipe is just there to direct the gases under the car, and it's not essential, you can run and external wastegate with no screamer attached and it will still work. my screamer is pretty shit but still sounds awesome. if you run an external wastegate with no screamer it will absolutely stink on full boost as all the excess exhaust gases go into the cabin. carbon monoxide is nay good! lol.

this is where everybody will jump down my throat and tell me i'm wrong and that decat/screamers are awesome

[Matt1878]

well there are two "types" of screamer. there's a decat/screamer that a fair few people have. personally think these are pretty crap, they tend to blow on idle but the intention is that when the wastegate on the turbo opens it divorces the excess gases from the exhaust allowing them to escape easier/quicker. the screamer i was talking about is the one you would bolt onto an external wastegate, when you reach the spring pressure in the wastegate (in my case 0.8 bar) the wastegate opens, allowing the excess gases (which in your case are causing the overboosting) to escape via the screamer pipe. the screamer pipe is just there to direct the gases under the car, and it's not essential, you can run and external wastegate with no screamer attached and it will still work. my screamer is pretty shit but still sounds awesome. if you run an external wastegate with no screamer it will absolutely stink on full boost as all the excess exhaust gases go into the cabin. carbon monoxide is nay good! lol.

this is where everybody will jump down my throat and tell me i'm wrong and that decat/screamers are awesome

Well I learned something there .. thanks!! Love learning new stuff.