B6T blowing out spark?

[Ford Fester]

I have b6T that I am running on 91 @ 15 psi with reich racing ecu. I have been running this for quite a while now. It had a full exhaust system until the other day. I took it off to make my own. Now I spool instantly and if I do full throttle runs it will pop and backfire and bog out. Any ideas what's going on?

[bhazard]

Re: B6T blowing out spark?

Is it still running 15 psi or is it spiking? A vj14 with open exhaust will spike out of control...there's not enough flow through the wastegate to control boost.

Otherwise...regap your plugs. .030" max

[shadetree]

Correct !! But isn't it to much flow through ??
i put 2.5 exhaust on mine and had these same problems with over boost spikes . I really had to watch things !

[M3NTAL]

Silly people and their itty bitty ihi churbos.

Max did April have my baby yet?

[Damkid]

B6T blowing out spark?

Is it still running 15 psi or is it spiking? A vj14 with open exhaust will spike out of control...there's not enough flow through the wastegate to control boost.

Otherwise...regap your plugs. .030" max

^^this FTW

when I first got my KL turbo'd I couldn't go WOT passed 4k rpm because the spark plug gap was too big, re-gapped to .030" and problem solved

[M3NTAL]

tighten up max! had the same thing happen to me. what plugs are you running? did u go a step or two colder now that your at 15psi?

[Ford Fester]

Original plugs and wires! Haven't even pulled a plug yet. This b6t is untouched other than the religiously document oil changes. I have zero spike. Full throttle in 4th or 5th is 15 and it holds is smooth. It used to be 14 in 1st and 15 in second and third. I had spikes but then played with the turboxs hpbc and now it's perfect. Since spark is blowing out I can't get full boost in the first 3 gears unless I ease into it. 100k on original plugs is that too much to ask?

[rbrown]

Do tell us what the gap is when you pull them.

[Aaronbrook37]

Original plugs? Oh dear... yeah, definitely get to work gapping a new set as soon as you can!

[Advancedynamix]

Run NGK v-power, and tighten the plug gap a few thou from the tight spec in the book. These engines are picky when it comes to plugs. You may want to go 1 heat range colder if you plan on long full boost pulls.

[M3NTAL]

ngk bkr7e (4644) is what I was running

[Ford Fester]

It had autolite platinum plugs with a 50 thou gap. Must have replaced before but they are old looking

[bhazard]

Re: B6T blowing out spark?

That's horrible. Not only was the gap way out of spec but they were platinums too!

[Ford Fester]

I'm better she will like the copper v power plugs that I will install tomorrow

[Ford Fester]

Spark plugs fixed it.