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Another A&A Ti-Trim Build

 
Old 01-17-2019, 01:42 AM
  #41  
aaronc7
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I did the same tests with 6.2, 6.3, and 6.4 and it did not make one bit of difference. Perhaps my cam is not aggressive enough, not enough overlap for this to have any potential gains or improvement. I did get a nice long drive in, cruise cell VE table should be more or less done
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Old 01-18-2019, 09:46 PM
  #42  
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Hit 4.6psi of boost today at 3800rpm.....woohoo lol. Slowly working on the tune. It was pretty lean so I stopped there and didn't get out again for the next revision.

Drove the car at least an hour and everything was fine. Parked it for a few hours, cold start, and belt is chirping pretty loud. I confirmed it was the 8 rib blower belt by spraying water.

I've never really had belt issues on any car before so kinda learning about it now. Google says misalignment or something up with a pulley or something. I did spill some oil in the engine bay a couple days ago, so in the back of my mind I'm thinking maybe somehow this contamination might finally be rearing its head or something. Google says contamination would likely show different signs than mine/spraying water wouldn't help or would make it louder, but that is the only thing I can think of that might be it.

Either way going to pull the belt and check all components out. Since it's the secondary drive, thankfully it's the easiest belt to pull and really not many parts to it... check everything out and clean everything and go from there.

Another possible thought is just pulley alignment, I was really hoping to avoid any issues like this by buying all new stuff from AA as a kit... we'll see where step 1 takes me.

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Old 01-21-2019, 08:15 PM
  #43  
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Engine side sidewall of belt is getting worn and there is some belt dust on engine side as well. Definitely seeming like a pulley alignment issue. All you guys who said to get a laser alignment tool were right I guess

I thought about what the source of the issue could be and I found a post from 2013 where a guy is running the same water pump is me (ACDelco 252-846), and he had to grind down the water pump mounting point by 0.020" to get things lined up and not cause issues.

I don't have any real data yet but I have a feeling that may be it. If that's it IDK if I want to go down the road of trying to grind that thing down or just get a different/known good water pump.

Other than that I did have to clearance the ears on the water pump a bit and ever so slightly elongate the holes in the main bracket to get it to fit. My heads were milled and it was enough such that the holes didnt line up. I am pretty confident I clearanced things enough to make sure the bracket was able to sit flush.... I was consciously aware of the fact that I needed it to be to avoid possible alignment issues. Worth double checking I suppose while I'm there.

What exact (part number) pump are you guys running with no issues? For whatever reason the one I got is not talked about much on here.... it was a direct replacement for my 2003 pump and I didn't have to go to the 'newer' style neck with removable tstat.

I haven't worked on anything for the past several days.... I just need a break from it all so I don't get too frustrated. Trying to come up with any ideas and gameplan in the meantime.






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Old 02-02-2019, 10:09 AM
  #44  
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So I finally got around to checking things out with laser alignment tool.

Had to calibrate the thing, it was not that close.

Blower/main bracket does not appear to be crooked, it more or less is right on the 2nd peak like it should be. Auto tensioner pulley was spot on.

I checked the secondary drive / alternator side and it was lined up perfectly. I also did this to confirm the laser tool was working right. PS pulley is off by ~1/3 rib but it's been working fine so I don't think I'm gonna touch it and that's a separate belt.

Only thing I could find off was if I spin the blower pulley as I shoot the laser, the laser walks around a bit, showing that the blower pulley "wobbles". Total wobble is maybe 1/4 a rib total? I did this at least 10 times and did the same test with the tool on the other side of the pulley and the test was the same and repeatable every time.

Also the blower pulley shows some belt rubber remains on the side

At this sort of distance I don't feel like that wobble/walk is a huge amount, but it is the only thing off that I could find.

I don't know if this small amount of wobble is typical or indicate that something might be wrong with the blower pulley or the blower internals itself. When I spun the other pulleys, they did not really walk around. Maybe the blower pulley wobble is worse once there is belt tension on it?

Going to hit up A&A and see what they think. Figured I would post up here too since it's the weekend.

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Old 02-02-2019, 11:45 AM
  #45  
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Old 02-02-2019, 08:07 PM
  #46  
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I love tools that work
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Old 02-02-2019, 10:42 PM
  #47  
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Posted video in the other thread I made... definitely got a wobble to it.

Only good thing right now is that I found my belt for cheap cheap on rockauto lol! plus like 3 dollars shipping.

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