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-   -   Will she blow? (https://forums.turbobricks.com/showthread.php?t=357900)

RichGT 11-20-2020 02:59 AM

Will she blow?
 
https://imgur.com/gallery/JpgEwpT

Note the odd chirping/ ticking noise?

Motor has cleaned up 531. Head is decked, valves lapped (not by me), lash correct. Running the mis-ground iPd turbo cam from many years ago, was running at 2 deg advanced for years in stock 530 head. Timing seems off, I have modified dizzy to allow for the out of alignment keyway. Matches the original bad distributor, with new hall sensor wiring

89 b230ft, Lh2.2, leads, plugs, TPS reset and idle adjusted, new water pump, heater bypass valve, bypass hard pipe, yoshi turbo drain, phenolic inlets spacers.

Vac is good, vacuum lost in time with that chirp/tick. Any suggestions?

Harlard 11-20-2020 03:11 PM

The tick sounds like an exhaust leak. Chirp is likely overtightened belts. Also, reset your idle base settings. Also also, sounds like it's firing on 3. Definitely make sure the timing belt isn't off a tooth.

RichGT 11-20-2020 04:06 PM

Quote:

Originally Posted by Harlard (Post 6131616)
The tick sounds like an exhaust leak. Chirp is likely overtightened belts. Also, reset your idle base settings. Also also, sounds like it's firing on 3. Definitely make sure the timing belt isn't off a tooth.

Yeah does sound like itís on 3, thanks

LC4CARL 11-20-2020 05:11 PM

Quote:

vacuum lost in time with that chirp/tick.
Possibly an intake valve issue? Does the vacuum gauge swing dramatically? Compression OK?

RichGT 11-20-2020 05:52 PM

Yep, vac gauge to zero, I’ll be pissed with the machinist if that’s the case! Compression good

90volvo 11-20-2020 08:02 PM

pull plug wire off one at a time. When you find the one that doesnt change anything. Thats the bad cylinder but, diffently sounds like something foreign in cylinder. I wouldnt run it anymore than you have to and pull head off. Good luck

ZVOLV 11-21-2020 05:03 PM

Unplug an INJECTOR one at a time to perform a cylinder drop test. Much safer.

LC4CARL 11-21-2020 08:26 PM

Remember that cool tool in shop class that would allow you to drop a cylinder at the touch of a button?

What is "out of alignment keyway?" Sounds bad...

RichGT 11-21-2020 09:58 PM

Quote:

Originally Posted by LC4CARL (Post 6131935)
Remember that cool tool in shop class that would allow you to drop a cylinder at the touch of a button?

What is "out of alignment keyway?" Sounds bad...

The keyway where the distributor drive dog fits into the cam. The early turbo cams from IPD where ground 20 deg out of alignment from correct ignition timing. No time for this with work being busy before Xmas. I will report back with findings

James M 11-21-2020 10:12 PM

Quote:

Originally Posted by ZVOLV (Post 6131881)
Unplug an INJECTOR one at a time to perform a cylinder drop test. Much safer.

Nah, I enjoy the sweet sweet feeling of 20k volts hopping from my elbow to the strut tower

Harlard 11-21-2020 10:37 PM

Quote:

Originally Posted by James M (Post 6131965)
Nah, I enjoy the sweet sweet feeling of 20k volts hopping from my elbow to the strut tower

Btdt. No recommend.

ZVOLV 11-21-2020 10:46 PM

Dropping a fuel injector is also safer for the kitty.


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