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  1. joel5.0

    Max lift w/ TFS 170cc heads?

    Total valve lift has nothing to do with the possibility of pistons hitting the valves. If they clear with 1.6 rockers, 95% of the times they will clear with 1.7 or 1.72 rockers. It's the overlap period (exhaust to intake cycles changeover) when both valves are partially open at the same that PtV...
  2. joel5.0

    Speed density/E-303?

    It will depend on the setup as a whole.... as shown at YouTube - SD '88 306 Idle
  3. joel5.0

    Carb size help

    347 + boost.... and a 600-650 BT carburetor is OK? A little history regarding the "over carbed" stuff...... '65-'66 Shelby 289 ci GT350's came with a 715 CFM Holley...... the 1969 302 Boss had a 780 CFM Holley.... and a 750/825 on a SC 347 setup could be over carbed?...:nono: A carburetor is...
  4. joel5.0

    F303

    Will it fit?.... yup Is it the best choice/alternative for your case?..... nope, there are better choices. Total valve lift has nothing to do with clearance issues between piston and valves. You can install .535", .542", .583" on a stock block... BTSTDT. You should always check for PtV...
  5. joel5.0

    trick flow 190 heads, what cam

    Yes I am, or is the variable cam timing concept not the same as installing the correct valve events? Obviously the Windsor/Cleveland setups do lack that technology and capability however, haven't you heard of the concept "middle ground"? And yes..... everyone with a 302 would be better off...
  6. joel5.0

    trick flow 190 heads, what cam

    :nono:.... 190's are not "a bit much for a 302"....... they simply do not require such an aggressive camshaft on the intake to perform more efficiently. Or are 260cc heads a bit much for OEM 376 CI engines used in '07+ trucks and SUV's by GM?
  7. joel5.0

    Code 33 and 84 help

    Ditch the scanner and follow the DIY procedure with a paper clip and test light (if the CEL indicator is not functional). I have a Genisys 3.0 scanner and some times I have to follow the DIY procedure to isolate problems that don't allow the use of the scanner. Just a very cheap thought, you do...
  8. joel5.0

    Code 33 and 84 help

    Codes 44 and 94 are not valid KOEO codes. They are KOER exclusive codes to the thermactor system, in which the O2's are used to verify emissions system AIR routing engine running. Also keep in mind that a KOER self test can take 3-4 minutes for it to run and flash any failure codes.....
  9. joel5.0

    Ideal idle RPM?

    ISC Maximum Closed Throttle target is 850 RPM and 672 RPM is the minimum target.
  10. joel5.0

    B303 cam questions

    No, they will not work at all..... if doing things correctly is your goal, that is. Valve spring provision for total lift is just one item to look for when choosing the correct valve springs, and even the lazy lobe of a B-303 requires a better pressure rated spring than the stockers. Besides...
  11. joel5.0

    Pro-comp Heads?

    So TFS, AFR, Edelbrock do not cast locally? Aren't cylinder heads the topic, not rods? Again.... why would 210cc be too big N/A on a 302? ... and what is "too much" port volume and why? .... again, N/A. Why using GM as an example has no basis? Aren't they 4-cycle engines like the 302? And...
  12. joel5.0

    Pro-comp Heads?

    Why?....... Do you know the intake cc's of OEM GM heads on 6.2L (376 ci) engines used in Escalades, Yukon, Sierra, Silverado trucks? ..... and a redline of 5900 RPM while making 400HP + 410TQ peak numbers?
  13. joel5.0

    Pro-comp Heads?

    Pro Comp heads are NOT cast in Australia, they are Chinese...... but don't believe me, check what the Aussie's at their EBay site DO confirm = http://reviews.ebay.com.au/Guide-to-Aluminium-Cylinder-Heads-for-Small-Block_W0QQugidZ10000000005730226 210cc heads are NOT really big for a 302...
  14. joel5.0

    N-41 AFM with 1.7 RR's

    The only one that can provide you with the correct answer is........ your setup after you measure for PtV. Assuming you degree the camshaft and based on the IO event of 1° BTDC @.050"..... intake valve has a good chance of clearing. On the exhaust side, with a EC valve event of 5° ATDC @.050"...
  15. joel5.0

    What voltage at ECT connector?

    4.71 vdc is above the 4.6 vdc maximum threshold for the ECT or ACT circuits. IOW.... the system is within its working range as far as the ECM is concerned. Also keep in mind that when you start the engine with a hard failure code present (ECT is one), the system will switch to Failure Mode...
  16. joel5.0

    What voltage at ECT connector?

    A little tip for future TS events and aftermarket components are installed, disconnect them and test the system in its OEM configuration (MSD ignition boxes, tuning chips, aftermarket tuners, and SNEEC IV datalogger) :nice: The fact that now you have the correct ECT and ACT (did you check it...
  17. joel5.0

    1.6 - 1.72 rockers - differences?

    More valve lift across the seat-to-seat open-close duration of the camshaft.
  18. joel5.0

    What voltage at ECT connector?

    Looks like that ECM is also defective. Last test to confirm. 1. Leave ECT, ACT, ECM disconnected. 2. Check resistance at ECM connector between: Pin 7 & 25 and pin 40 Pin 7 & 25 and pin 60 Pin 7 & 25 and pin 20 Pin 7 & 25 and pin 49 They all should be >10kΩ 3. If the above steps...
  19. joel5.0

    What voltage at ECT connector?

    It should be 5vdc or similar to the other VREF source...
  20. joel5.0

    What voltage at ECT connector?

    Nope..... the only way (which is acceptable to do) is to cut the ECT and ACT wires near the ECM connector leaving space for them to be repaired afterward (this removes the harness possibility out of the picture) and check voltage from the cut wires ECM connector side. Disconnecting the ECT only...
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