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Old 03-15-2018, 10:12 PM   #476
t8fanning
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I bet. The first two measurements were freehand. The last three were with the snap gauge resting on the piston. But it's mostly my inexperience with it surely.

I'm using studs, so hopefully I won't have much distortion if any.
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Old 03-16-2018, 03:28 PM   #477
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Just called up wiseco and ordered some new rings based off of this spec sheet:



It's a little different than this one I got from Kenny (below), but it's newer and more likely the actual pistons I have.



If you want to order some new rings from Wiseco, just tell them the part number of the pistons (I used ASC-00317) and they can look it up from that. They're XS style and like $34 per piston.
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Old 03-26-2018, 09:26 AM   #478
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So what's your game plan, are you pulling in rings and anticipating replacement?
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Old 03-26-2018, 01:20 PM   #479
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So what's your game plan, are you pulling in rings and anticipating replacement?
Engine is totally stripped. I'm taking the block and pistons to the machine shop probably tomorrow to have them check the piston to wall clearance and probably a tiny hone.

I already have new rings, so if both pistons and block check out, I'll reassemble everything and put it back in. Bearings look pretty good, I don't think I'll have to replace any.
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Old 03-26-2018, 01:26 PM   #480
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I have next to no experience from this, other than building my B23, but why wouldn't you just replace the bearings no matter what if it's apart?
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Old 03-26-2018, 01:30 PM   #481
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I don't have any experience either. Just makes sense that if it was working fine, no need to replace them. Plus it's extra money and time.
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Old 03-26-2018, 01:38 PM   #482
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I don't have any experience either. Just makes sense that if it was working fine, no need to replace them. Plus it's extra money and time.
No reason to throw away good bearings with nominal time on them.

Good to know the rings were easy to get. I'm interested to see what the MS reports back.
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Old 03-26-2018, 01:44 PM   #483
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Oh this is still a new-ish build. I forgot about that. Carry on!
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Old 03-26-2018, 01:45 PM   #484
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No reason to throw away good bearings with nominal time on them.

Good to know the rings were easy to get. I'm interested to see what the MS reports back.
It was way easier and faster than I thought. Just gave them the custom piston part number from the above sheets and they looked it up and sent them out in a day or so.
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Old 03-26-2018, 01:45 PM   #485
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Oh this is still a new-ish build. I forgot about that. Carry on!
Yeah. The engine has only had about a year of driving on it.
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Old 03-27-2018, 01:00 PM   #486
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Took my block and pistons to the machine shop today and got some good news. My piston to cylinder clearance is 0.0045" on all four. Should be great for the power I'm trying to make. They're just doing a hone to help my rings seal, should be done tomorrow. I'll then pop everything back in with new rings and hopefully be fine.

I do think I need some more ventilation though. I'll probably get a Yoshifab mechanical fuel pump vent.
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Old 03-27-2018, 01:07 PM   #487
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What size lines are you using for your catch can setup?
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Old 03-27-2018, 01:08 PM   #488
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-10 from the block and oil cap. -8 return. -10 to the intake pre turbo.
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Old 03-27-2018, 02:48 PM   #489
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I've always wondered how adding more vents is going to help if the catch can is limited by the one -10 to the pre-turbo pipe.
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Old 03-27-2018, 03:02 PM   #490
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I hope the additional volume added by the hose helps.

I don't think the pre-turbo hose diameter is the problem. It's only there to create a low pressure zone in the catch can. I think the catch can size and baffling are the real limiting factors. If it was larger and/or had better baffling, it probably would better separate the oil vapors.
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Old 03-29-2018, 10:38 PM   #491
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Awesome project!

I followed your example and did the Walbro 450 swap as you have pictured, but I cannot for the life of me get the assembly back in. Is there some magic trick or special procedure you can reveal? After knocking off the sock into the tank the 3rd time, I quit
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Old 03-30-2018, 01:30 AM   #492
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Awesome project!

I followed your example and did the Walbro 450 swap as you have pictured, but I cannot for the life of me get the assembly back in. Is there some magic trick or special procedure you can reveal? After knocking off the sock into the tank the 3rd time, I quit
How did you angle the sock?
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Old 03-30-2018, 08:22 AM   #493
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How did you angle the sock?
Not quite sure what you're asking. The sock can only go on the pump one way and is wider than the hole. I'm putting the sock in first, but the wider lower body of the Walbro and the float together are too wide for the hole. The sock pops off when trying to take it back out maybe because I am not folding it to get it out like I do putting it in.
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Old 03-30-2018, 01:11 PM   #494
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You have to make sure the float is facing in toward the pump to minimize the cross section. Then kinda just angle the sock in, then kinda pop the float past the hole and hope it doesn't fall out.
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Old 03-30-2018, 01:12 PM   #495
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So I got the engine block back from the machine shop with a fresh hone. Some paint came off while they were cleaning it. The shop that painted it apparently used VHT "safety red", which isn't listed as a color. I'll probably just touch up with VHT bright red.

Last edited by t8fanning; 03-30-2018 at 01:27 PM..
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Old 03-30-2018, 08:50 PM   #496
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......then kinda pop the float past the hole and hope it doesn't fall out.
It didn't fall out, it cracked like an eggshell. Crap!
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Old 04-14-2018, 07:20 PM   #497
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Finally did some work on the engine today and assembled the rotating assembly. I'm still waiting on some parts from IPD, so it's probably not going to run anytime soon.

But I did find out what my blowby problem was. My ring end gap was huge. Something like 0.030". I set the new gaps to 0.022" and was sure to clock the rings like Wiseco says to. Everything seems nice and tight.

Here's an old ring:
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Old 04-27-2018, 11:04 PM   #498
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Man that sucks about rings! I remember during the build if they recommended any different rings too. Hope you hit that whp goal!
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Old 04-30-2018, 03:24 PM   #499
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Man that sucks about rings! I remember during the build if they recommended any different rings too. Hope you hit that whp goal!
Yeah it happens. It was kinda nice because it forced me to fully tear it down and rebuild, which I have never done before. It was nice to learn how easy it is to assemble an engine. I also had time to do a couple more things like add some turbo bracing and another oil pan bung.
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Old 05-10-2018, 11:50 PM   #500
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I hate this.

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