Another blow thru 1600 build

[Clonebug]

It’s best to pull the sensor if it’s not working instead of driving it when off… the sensor can get ruined if no power is to it.

[John S.]

Thanks

[John S.]

Ok, so this is what happened. Took a friend for a July 4th turbo blast. But, earlier I checked my boost controller. The boost was only going to 8-9, but earlier I locked it down on minimum. Where before it was kinda just off minimum. So I pulled over and said screw it and turned it up a little. Took off from the curb, he said it went to 18 and I shifted and instantly got a miss. I probably drove 20 yards and then limped it home. Its hot, plus we’re actually having a cook out. And I’m busy for the next few days. But I guess I’ll start by pulling the spark plugs.

[rubenski]

Something broke?

Verstuurd vanaf mijn SM-A528B met Tapatalk

[madmike]

Check ur plug wires, had one blow off on me before hope its an easy fix for you!

[Chip Birks]

That's not good. 18psi, non intercooled on pump gas? I'm gonna guess you just cracked a cylinder, at best, torched a head at worst. Sorry to hear. Been down that road a few times myself. Cracked cylinder is an easy enough fix.

[John S.]

I hope this was the weak link.

[Clonebug]

I was going to say...check your intake connectors. Those orange connectors only hold to about 13-15 lbs boost. I blew them a couple times then went to a 4 or 5 ply silicone reducer that would hold any pressure. They were a bitch to get on but they sure held well.
I think there was a thread on theSamba that had a link to the connectors. Stock size is 1 3/8ths to 1 5/8ths inch..

I found the link to the couplers...get a set of these....they are a bitch to get on but they won't break...

https://www.siliconeintakes.com/intake- ... p-118.html


I'd be a little careful going over 10-12 lbs boost without W/I and/or an intercooler. I't pretty easy to damage pistons or cylinders especially if your ambient temps are any amount over 70* F.

[Chip Birks]

I hope this was the weak link.

Lucky break there! Hopefully that's all that you have wrong. Definitely explains a misfire.

[John S.]

Thanks everyone. I ordered the urethane red ones. I’ll see how they do. And keep the boost down. Also, the boost controller has a set screw that creates the detent for the knob. Well it vibrated out. I can turn it tight to zero and that appears to be 8lbs. Gotta get a metric set screw.

[John S.]

I got the new boot kit already. In stock at the local Amazon warehouse. $16 overnight.

[tucson vw]

If you don’t mind me asking ,what jetting did you end up with or are you still working that out?

[John S.]

It’s a 40 drla and the vents are 34mm. I used empi’s baseline single 40 jetting as a baseline. Right now I have 165 main, 60 idle, 180 air, 50 pump jet. This is with cb turbo emulsion tube and no mod rings. It does have a low speed stumble that I’ve tried messing with the idle and pump jets. I usually end up going back. Hard driving it does show. My O2 is intermittent, but I’m on the rich side. All on a smal cam 1600. MSD provides the spark(I’ve never fouled any plugs) and timing as limited with bent stops in the distributor.

[tucson vw]

Thanks for the info

[John S.]

I finally replaced my intake boots and may have another problem. Number 3 is dead. I changed the plug and still not firing. I’ll have to take a compression test.