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  • 78HZSBC's Avatar
    Yesterday, 07:54 PM
    Just reading your post as i have an interest in this, one thing i have been wanting to know is where to set my total timing, reading online its...
    5 replies | 829 view(s)
  • 78HZSBC's Avatar
    11-04-2021, 09:26 PM
    78HZSBC replied to a thread Vacuum bounce at idle in Chevrolet
    To be honest I have no idea what the pcv valve is rated for, it's an aftermarket pollished alloy one that I chose a while back. Only assumed all pcv...
    41 replies | 2097 view(s)
  • 78HZSBC's Avatar
    11-04-2021, 06:49 PM
    78HZSBC replied to a thread Vacuum bounce at idle in Chevrolet
    Update on a few checks done today. Checked TDC timing tab, all good. Did compression test (cold) all cylinders 175 to 180psi. While the leads...
    41 replies | 2097 view(s)
  • 78HZSBC's Avatar
    10-04-2021, 10:13 PM
    78HZSBC replied to a thread Vacuum bounce at idle in Chevrolet
    Yes but obviously the rocker cover was hot so not sure how well I blocked it with my hand, was a bit rushed. Can try again
    41 replies | 2097 view(s)
  • 78HZSBC's Avatar
    10-04-2021, 07:44 PM
    78HZSBC replied to a thread Vacuum bounce at idle in Chevrolet
    Quick update, I had a chance this afternoon to check a couple of things but still same issue with bouncing vac reading. As recommend I blocked off...
    41 replies | 2097 view(s)
  • 78HZSBC's Avatar
    09-04-2021, 08:55 PM
    78HZSBC replied to a thread Vacuum bounce at idle in Chevrolet
    How do you know my compression ratio?
    41 replies | 2097 view(s)
  • 78HZSBC's Avatar
    09-04-2021, 03:18 PM
    78HZSBC replied to a thread Vacuum bounce at idle in Chevrolet
    Watching that video my vac gauge looks more like option 3 and it mentions its more likely to be an ignition problem. Funny the ignition system the...
    41 replies | 2097 view(s)
  • 78HZSBC's Avatar
    08-04-2021, 03:58 PM
    78HZSBC replied to a thread Vacuum bounce at idle in Chevrolet
    Thats one reason I like the street HP for the air bleeds, im probably not going to modify the 600 too much as once the engine's run in im most likely...
    41 replies | 2097 view(s)
  • 78HZSBC's Avatar
    08-04-2021, 07:20 AM
    78HZSBC replied to a thread Vacuum bounce at idle in Chevrolet
    I wouldn't say mine is significant but I do have similar hesitation off idle especially when cold, I initially assumed this was the cam but most...
    41 replies | 2097 view(s)
  • 78HZSBC's Avatar
    07-04-2021, 10:45 PM
    78HZSBC replied to a thread Vacuum bounce at idle in Chevrolet
    Total timing is 35 and from memory the initial is around 18
    41 replies | 2097 view(s)
  • 78HZSBC's Avatar
    07-04-2021, 08:37 PM
    78HZSBC replied to a thread Vacuum bounce at idle in Chevrolet
    At the moment I have a new 600 Holley vac secondary that set straight out of the box and plan on keeping it until the engines run in then look at...
    41 replies | 2097 view(s)
  • 78HZSBC's Avatar
    07-04-2021, 05:50 PM
    78HZSBC replied to a thread Vacuum bounce at idle in Chevrolet
    Nice, if I was to build again I'd think I'd choose a bigger cam also. Still, happy with this one. Yeah will report back when I get a chance to check...
    41 replies | 2097 view(s)
  • 78HZSBC's Avatar
    06-04-2021, 09:44 PM
    78HZSBC replied to a thread Vacuum bounce at idle in Chevrolet
    Ok well the PCV valve check will be easy when I get a chance (I'm away for a week) After that might do a compression test first to maybe help narrow...
    41 replies | 2097 view(s)
  • 78HZSBC's Avatar
    06-04-2021, 06:35 PM
    Im in the process of setting my Holley idle mixture screws on my new 350 and connected a vacuum gauge to the vac port on the holley base plate and...
    41 replies | 2097 view(s)
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