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  • GtoGeoff's Avatar
    17-04-2021, 09:53 PM
    LX, I have the Chinese HEI in my GTO, been in a few years, driven weekly. They even come with a steel dist gear, & I am using mine with an 8620...
    26 replies | 906 view(s)
  • GtoGeoff's Avatar
    16-04-2021, 08:13 PM
    LX, Why don't you get a GM HEI for it? Put your own curve in it so you can run MVA. $80 brand new from Road Star in Sydney. I would be happy to...
    26 replies | 906 view(s)
  • GtoGeoff's Avatar
    15-04-2021, 07:42 PM
    GtoGeoff replied to a thread Importing US parts in Members Lounge
    I do not think Summit is the problem as far as shipping goes. There is a HUGE amount of product on b/order in the US. Some of it could be due to the...
    18 replies | 1106 view(s)
  • GtoGeoff's Avatar
    14-04-2021, 07:57 PM
    GtoGeoff replied to a thread Holley T Slots in Holden V8's
    What he is saying is he is blipping the secondary shaft. In that case, I suspect fuel flow from the sec T slots would be correct because that is...
    5 replies | 739 view(s)
  • GtoGeoff's Avatar
    12-04-2021, 09:06 PM
    Basic, Were you using the Crane VA unit? Those & many others like Accel & Mr. Gasket have a sleeve inside the spring & when adjusting rate AND...
    5 replies | 824 view(s)
  • GtoGeoff's Avatar
    11-04-2021, 12:03 AM
    GtoGeoff replied to a thread Vacuum bounce at idle in Chevrolet
    Basic, No argument from me that modern digital ign systems can duplicate the timing features provided by MVA. Some like me like the simplicity &...
    41 replies | 2095 view(s)
  • GtoGeoff's Avatar
    10-04-2021, 11:13 PM
    Not a silly question. VA, whether ported or manifold sourced, is a load sensitive device, based on engine load & vacuum. That is the beauty of it....
    6 replies | 1101 view(s)
  • GtoGeoff's Avatar
    10-04-2021, 01:17 PM
    GtoGeoff replied to a thread Vacuum bounce at idle in Chevrolet
    Basic. Yes". many engines run 'perfectly fine without 35-40*', on, say, 15* init timing . The point is that many of them would run better with...
    41 replies | 2095 view(s)
  • GtoGeoff's Avatar
    09-04-2021, 07:17 PM
    GtoGeoff replied to a thread Vacuum bounce at idle in Chevrolet
    Basic, Couple of comments about your comments. My reference to needing 40* at idle was specific to this engine, which has low vacuum & low CR;...
    41 replies | 2095 view(s)
  • GtoGeoff's Avatar
    08-04-2021, 08:17 PM
    GtoGeoff replied to a thread Vacuum bounce at idle in Chevrolet
    LX, 'Runs heaps better with more timing at idle'. Believe me, you are NOT the exception to the rule. I 'preached' on here when I first joined...
    41 replies | 2095 view(s)
  • GtoGeoff's Avatar
    08-04-2021, 08:02 PM
    Agree with EH about more timing. If I am reading the numbers correctly, you have a total of 40* at cruise. That is really low for 9.0:1 CR. I...
    6 replies | 1101 view(s)
  • GtoGeoff's Avatar
    07-04-2021, 08:12 PM
    Excellent set up!
    120 replies | 7404 view(s)
  • GtoGeoff's Avatar
    06-04-2021, 08:20 PM
    GtoGeoff replied to a thread Vacuum bounce at idle in Chevrolet
    I think most likely cause is a vacuum leak or valve adjustment . Also check the PCV. Block the PCV. If vac is then steady, PCV is pulsating from low...
    41 replies | 2095 view(s)
  • GtoGeoff's Avatar
    06-04-2021, 08:15 PM
    The idea is to try 'balance' the force or load on the t/shaft to minimise wear. So there would be some adverse affect if there is a spring pulling in...
    120 replies | 7404 view(s)
  • GtoGeoff's Avatar
    03-04-2021, 07:10 PM
    Smitty, I looked at the pic of your cable. Same problem. Cable & spring pull in same direction putting extra force on the t/shaft. You could...
    120 replies | 7404 view(s)
  • GtoGeoff's Avatar
    03-04-2021, 06:51 PM
    Smitty, It is a problem whether a cable or rod linkage is used. It as all about the force pulling or pushing on the shaft, whether it is cable or...
    120 replies | 7404 view(s)
  • GtoGeoff's Avatar
    02-04-2021, 07:44 PM
    Two points. Don't use RTV where petrol or fumes come in contact with it. It softens up. If you are sealing a threaded hole in the induction...
    120 replies | 7404 view(s)
  • GtoGeoff's Avatar
    29-03-2021, 07:03 PM
    Symptoms do point to excessive fuel pressure as a possible cause. No need or reason to reduce plug gap with HEI. I have run over 3mm plug gaps...just...
    120 replies | 7404 view(s)
  • GtoGeoff's Avatar
    25-03-2021, 06:30 PM
    Hq308, You are correct, no relay. I saw that he 'rewired' for 12v & assumed a relay was used. Kavesh. Water is heavier than fuel & sinks to...
    120 replies | 7404 view(s)
  • GtoGeoff's Avatar
    24-03-2021, 07:05 PM
    He says he has the 12v relay, post 77. It is probably time to look at ign. Process of elimination. Run a jumper from the 'Bat' terminal of the HEI...
    120 replies | 7404 view(s)
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