Hard To Idle After Turbo Install

[AngryRB]

Sliver is that with stock ecu

no, thats with a power fc tuned for a small highflow, and stock afm and stock intake pipe

[AngryRB]

Avoid driving it dude, because lean afrs on cruise can and will burn your exhaust valves.

why would it be lean on cruise? i think your right with any boost it is leaning out, that must be why the light started flashing on mine, or maybe the tune.

[FordyR31]

Glad its sorted, got any pics of the intake setup? Seams to be the more of a bend you can get between the turbo and afm the better with these larger intakes.

pics to come of before and after

[FordyR31]

Here is how the intake was setup when it was stalling.

This is how I had it afterwards to fix the stalling. I'm more convinced it was the ripples in the flex pipe than the extra length and bend, obviously had the air filter on for the test, this was taken before I put it on for the sake of the pic .

[scotty nm35]

Its the angle the BOV enters, not the bend that causes the stalling imo. It looked like a nice intake until you ditched the airbox.

[FordyR31]

It was nice and the bov went in at the factory position. The intake was a solid copy of the stock one. New stainless airbox coming.

Edited April 6, 2012 by FordyR31

[Manuel Kasko]

Its the angle the BOV enters, not the bend that causes the stalling imo. It looked like a nice intake until you ditched the airbox.

I have to agree with scotty here

You can imagine the BOV just venting and bouncing around in all directions disrupting the flow.

When Scotty designed mine it dumps into the intake on an angle towards the turbo

[scotty nm35]

Shhh, dont tell everyone my secretz. lol.

[The Mafia]

Yet another thread full of mafia's condescending crap, i hope it makes you feel tough .

Not really hey, I've seen the AFRs after many of these upgrades and I know for a fact that they run lean and its not advisable to drive them far or at all.

So, dribble your shit elsewhere.

why would it be lean on cruise? i think your right with any boost it is leaning out, that must be why the light started flashing on mine, or maybe the tune.

I wondered the same thing, but I've seen it on a few cars.

I'm thinking that at 2,500rpm and above the turbo is spooling a tiny bit, making the air path easier into the motor. Being a bigger turbo, its able to help more air into the engine. Think about it, at those revs, the turbine is spinning at a notable speed. The compressor would be "helping" the air get into the engine easier on vacuum, allowing it to breathe easier.

What had been tuned to 14.5 - 14.7 afrs on cruise, I'd seen go above 15. Also caused the engine to run a little hotter at cruise due to being a little leaner.

Not all but a number of cars.

[JonnoHR31]

Oh no not a 5% rise in AFR's, how on earth are the exhaust valves going to survive that. Load is determined by the AFM, unless theres a leak or something else isnt working as it should then its fine to drive normally. Sure the AFR's arent always going to be EXACTLY the same as they were before but your not going to kill your motor by driving it around under light load. It takes AFR's upwards of 17-18:1 to do any damage to valves and pistons under light-medium load and you'd know all about it if it was that lean.

[zebra]

My highway cruise was 17:1 no damage to report

Also egts drop either side if stoich

[zebra]

No lean miss

[scotty nm35]

No miss here either, just feels a bit doughy at anything over 18:1. e85 ftw.

[AngryRB]

Not really hey, I've seen the AFRs after many of these upgrades and I know for a fact that they run lean and its not advisable to drive them far or at all.

So, dribble your shit elsewhere.

I wondered the same thing, but I've seen it on a few cars.

I'm thinking that at 2,500rpm and above the turbo is spooling a tiny bit, making the air path easier into the motor. Being a bigger turbo, its able to help more air into the engine. Think about it, at those revs, the turbine is spinning at a notable speed. The compressor would be "helping" the air get into the engine easier on vacuum, allowing it to breathe easier.

What had been tuned to 14.5 - 14.7 afrs on cruise, I'd seen go above 15. Also caused the engine to run a little hotter at cruise due to being a little leaner.

Not all but a number of cars.

i agree to this , the engine seems more powerful even without boosting compared to my old highflow i had, and that is significant , and its odd but i think true... and with cams i find it even more noticable..

Edited April 6, 2012 by SliverS2

[The Mafia]

Oh no not a 5% rise in AFR's, how on earth are the exhaust valves going to survive that. Load is determined by the AFM, unless theres a leak or something else isnt working as it should then its fine to drive normally. Sure the AFR's arent always going to be EXACTLY the same as they were before but your not going to kill your motor by driving it around under light load. It takes AFR's upwards of 17-18:1 to do any damage to valves and pistons under light-medium load and you'd know all about it if it was that lean.

No worries. So you just take your nose out of your ass shove your nose up the exhaust and have a sniff, and go "Yep, shes safe enough, thats about 16:1"

My whole point - Unless you have a wideband you have NFI. So is it worth the risk.

I've also seen cars cruise fine at 17:1 without a miss. Wonder how those exhaust valves are doing.

Who knows. But nah, she'll be right hey. Just spent $6k on a turbo upgrade, its just money. Who gives a f**k about the engine.

Its ok though, my cars will always be safe. And the people that listen to my advice.

[zebra]

You think 17:1 afrs at cruise is going to be hotter than 12:1 at wot?

Once again egts drop either side of 14.7:1

[JonnoHR31]

I've also seen cars cruise fine at 17:1 without a miss. Wonder how those exhaust valves are doing.

Perfectly fine, not gonna hurt them at all.

[GTSBoy]

I concur. Tuning for light cruise mixtures of 16:1 is fine. 17:1 also fine, if it will do it without stuttering.

[Bsa]

Mafia are you gay you seem to love talking about dick and guys asses. Good to see you sorted your stalling issue mate