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Search found 2288 matches

by Tuner
Wed Mar 25, 2020 7:24 pm
Forum: Engine Tech
Topic: Ford DS II ignition upgrades?
Replies: 15
Views: 583

Re: Ford DS II ignition upgrades?

Sorry, but I am well into my 60s and I recall all too well stuffing a section of windshield washer tubing behind the outer point arm to get more rpm out of the motor without breaking up ! Stuff in 14 to 1 compression in to any motor running on a stock coil fed point system tacking between 5500 and ...
by Tuner
Tue Mar 24, 2020 10:37 pm
Forum: Engine Tech
Topic: Ford DS II ignition upgrades?
Replies: 15
Views: 583

Re: Ford DS II ignition upgrades?

427 435hp tach, 6500 RPM redline, single point Delco-Remy ignition. D112-P Delco-Remy points, 8000+ no sweat, no dwell loss or point bounce when used in a properly prepared distributor.

Image
by Tuner
Tue Mar 24, 2020 3:37 pm
Forum: Engine Tech
Topic: Ford DS II ignition upgrades?
Replies: 15
Views: 583

Re: Ford DS II ignition upgrades?

If you need to make rising HP numbers above 5500 rpm then you have no choice but to ditch that factory system, especially if your running compression ratio's above 11 to 1. LOL at you kids that apparently never had the pleasure of using points ignition with engines turning considerably more than 55...
by Tuner
Sat Mar 14, 2020 12:22 am
Forum: Engine Tech
Topic: Engine Masters rod ratio test results
Replies: 151
Views: 9339

Re: Engine Masters rod ratio test results

You guys are "bringing a tear to me one good eye." :D I have the same rigging and been doing the same spark gap and oscilloscope games since the early '70s. What a long strange trip it's been. First played with a couple of my father's friends' distributor machines in the 50s in grade school, used th...
by Tuner
Thu Mar 12, 2020 5:01 pm
Forum: Engine Tech
Topic: Engine Masters rod ratio test results
Replies: 151
Views: 9339

Re: Engine Masters rod ratio test results

Where are these dyno sheets at ? If you have accurate dyno room weather data (BP, VP, TEMP), fuel lbs/hr and A/F ratio. SCFM can be calculated. Stan i'm likewise wondering : Where are these dyno sheets at ??? anyone have a web Link to these Dyno Sheets ?? Don't want to lose track of the subject of ...
by Tuner
Thu Mar 12, 2020 4:58 pm
Forum: Engine Tech
Topic: Engine Masters rod ratio test results
Replies: 151
Views: 9339

Re: Engine Masters rod ratio test results

"I have yet to meet the racer (or engine builder) who knows the actual timing curve of his engine while on the track." I have confidence the curve seen on a distributor machine and confirmed in the engine, on a dyno or not, is what you get on the track. You're kidding, right? For vintage ignitions ...
by Tuner
Tue Mar 10, 2020 6:12 pm
Forum: Engine Tech
Topic: Engine Masters rod ratio test results
Replies: 151
Views: 9339

Re: Engine Masters rod ratio test results

As in all things, if you think so, or you don't, you're absolutely right.
by Tuner
Tue Mar 10, 2020 4:54 pm
Forum: Engine Tech
Topic: Engine Masters rod ratio test results
Replies: 151
Views: 9339

Re: Engine Masters rod ratio test results

"I have yet to meet the racer (or engine builder) who knows the actual timing curve of his engine while on the track." I don't know what to say. I thought you were acquainted with a better crowd than that. Perhaps you need to get out more. I have confidence the curve seen on a distributor machine a...
by Tuner
Mon Mar 09, 2020 11:19 pm
Forum: Engine Tech
Topic: Engine Masters rod ratio test results
Replies: 151
Views: 9339

Re: Engine Masters rod ratio test results

If the timing wasn't checked at 500 or at least 1000 RPM steps from lowest to highest over the range of interest how will anybody know? This is too big a factor to be ignored. I've played this tune on lots of different engines but never with the same engine just changing the rod length, as this thre...
by Tuner
Mon Mar 09, 2020 9:49 pm
Forum: Engine Tech
Topic: Engine Masters rod ratio test results
Replies: 151
Views: 9339

Re: Engine Masters rod ratio test results

friction hurts BSFC, negative work hurts BSFC. Should we be looking at BSFC or BMEP? For a performance engine. I don't much care about BSFC but care a lot about BMEP. A change in fuels could easily affect BSFC without impacting BMEP. Isn’t BSFC in this case worthwhile comparing identical engines wi...
by Tuner
Sat Mar 07, 2020 8:22 pm
Forum: Engine Tech
Topic: Engine Masters rod ratio test results
Replies: 151
Views: 9339

Re: Engine Masters rod ratio test results

Were any of these comparison tests done with the spark advance curve optimized from the lowest to highest RPM, perhaps in 500 RPM steps or ? In any case, was the difference in best advance for peak output at all engine speeds accounted for? It seems to me that engines of the 'short rod' variety want...
by Tuner
Sun Mar 01, 2020 3:31 am
Forum: Engine Tech
Topic: GM Hei ignition modules
Replies: 19
Views: 1097

Re: GM Hei ignition modules

Reversed polarity kills them quick. If jumper cables are connected backwards even for a moment .... pufffttt. A bad diode in the alternator will kill them. Check the alternator by putting a load on the electrical system with headlights, heater blower, wipers, etc, rev engine to 3000 RPM and check th...
by Tuner
Thu Feb 27, 2020 3:03 am
Forum: Engine Tech
Topic: Welded piston domes
Replies: 9
Views: 955

Re: Welded piston domes

In 1950-51 I saw a DOHC Hal hole a cast piston (it may have been a Jahns but ?) Friday night, the piston welded with oxy-acetylene Saturday morning, and it won the A Main that evening. To cool it, two quarts of water were added to five gallons of fuel which was mostly methanol, but could have had so...
by Tuner
Sat Feb 22, 2020 2:26 am
Forum: Engine Tech
Topic: Would there be away to /holley 4412
Replies: 4
Views: 477

Re: Would there be away to /holley 4412

Investigate if a double-pumper secondary throttle shaft can be used to keep the pump cam in the original throttle side location and do whatever is necessary to attach whatever throttle lever you want on the other end, the original choke side. I don't know if the spacing to line up the pump cam is ri...
by Tuner
Tue Feb 04, 2020 5:04 am
Forum: Engine Tech
Topic: Pro Systems KING COBRA CARB!!
Replies: 5
Views: 849

Re: Pro Systems KING COBRA CARB!!

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Predator & Kendig carburetor appreciation society