Search found 169 matches
- Tue Apr 09, 2024 11:48 pm
- Forum: Engine Tech
- Topic: 11.5 compression, Iron Head, 91 octane
- Replies: 40
- Views: 1836
Re: 11.5 compression, Iron Head, 91 octane
Have cam king grind the cam and dont put as much advance in it possibly a retarded position this will work better than retarded ignition timming. Possibly water injection ? Take it to a chassis dyno for initial tuning.
- Fri Mar 15, 2024 4:26 pm
- Forum: Engine Tech
- Topic: HEI ignition, solid core leads & resistor-less rotor
- Replies: 30
- Views: 1319
- Fri Mar 15, 2024 4:24 pm
- Forum: Engine Tech
- Topic: HEI ignition, solid core leads & resistor-less rotor
- Replies: 30
- Views: 1319
Re: HEI ignition, solid core leads & resistor-less rotor
Energy at the spark plug is effected buy the impedance match between the gap the plug wire and the coil and effects the spark profile that in turn effects the ignition lag time that in turn is effected by the conditions in the cylinder and at the plug gap in particular. Some ignition strategies try ...
- Wed Mar 06, 2024 1:35 pm
- Forum: Engine Tech
- Topic: Chevy 327 Tunnel Ram Idling To Fast When Started
- Replies: 21
- Views: 1996
Re: Chevy 327 Tunnel Ram Idling To Fast When Started
Timming ramping up not returning to idle setting.
- Wed Jan 31, 2024 4:07 pm
- Forum: Engine Tech
- Topic: 4412 carb
- Replies: 7
- Views: 675
Re: 4412 carb
Find a good chassis dyno to set up your individual setup.
- Thu Oct 12, 2023 4:30 pm
- Forum: Engine Tech
- Topic: Spark plug cleaners?
- Replies: 8
- Views: 879
Re: Spark plug cleaners?
Always file the electrodes flat to get the sharp edges back.
- Sat Jul 15, 2023 9:36 am
- Forum: Engine Tech
- Topic: Holley Carb - A/F Ratio Tuning Help Please
- Replies: 32
- Views: 10393
Re: Holley Carb - A/F Ratio Tuning Help Please
Can you give more details then read this thread carefully it is carb tuning gold.
- Thu Jul 13, 2023 1:40 pm
- Forum: Engine Tech
- Topic: 512 mopar getting hot quick.
- Replies: 41
- Views: 3425
Re: 512 mopar getting hot quick.
I have seen " turbulators" in modern automotive radiators and a engineer at Howe radiator told me it is used to disturb the boundary layer in the tubes and increases efficiency. He noted a design he saw in the blueprint for a WW1 German tank radiator.
- Sun Jul 09, 2023 6:14 pm
- Forum: Engine Tech
- Topic: spark plug heat range?
- Replies: 25
- Views: 1809
Re: spark plug heat range?
Find a local chassis dyno and look at afr and do some timming pulls. Looks to cold to me.
- Sat May 20, 2023 11:38 pm
- Forum: Engine Tech
- Topic: Prayers For David Vizard
- Replies: 35
- Views: 5696
Re: Prayers For David Vizard
Have the speediest of recoveries!
- Sun Apr 30, 2023 9:41 pm
- Forum: Engine Tech
- Topic: Lean mixtures and baked pistons
- Replies: 31
- Views: 5041
Re: Lean mixtures and baked pistons
It's like the timming advancing further back the cycle till the intake stroke is lit and the thermal runaway picks up the pace.
Never thought of it that way.
Never thought of it that way.
- Sun Apr 30, 2023 11:37 am
- Forum: Engine Tech
- Topic: Lean mixtures and baked pistons
- Replies: 31
- Views: 5041
Re: Lean mixtures and baked pistons
So hi rpm full throttle combustion (as opposed to part throttle) and lean mixtures ( lean side of stoic) can lead to detonation that leads to pre ignition, pre ignition is advanced timming at hi speed and this puts more heat into the combustion chamber and the cycle avalanches and rapidly overheats ...
- Sat Apr 29, 2023 8:28 pm
- Forum: Engine Tech
- Topic: Lean mixtures and baked pistons
- Replies: 31
- Views: 5041
- Fri Apr 28, 2023 9:40 pm
- Forum: Engine Tech
- Topic: Lean mixtures and baked pistons
- Replies: 31
- Views: 5041
Re: Lean mixtures and baked pistons
Excess fuel helps cool the combustion chamber, when conditions allow the fuel to go from burning to detonating the pressure spike blows away the insulation properties of the boundary layer allowing the flame to directly touch the piston and it quickly overheats.
Just thinking.
Just thinking.
- Tue Mar 14, 2023 6:26 pm
- Forum: Engine Tech
- Topic: Low vacuum power valve tunning
- Replies: 15
- Views: 2064
Re: Low vacuum power valve tunning
Where is the o2 sensor located? My experience is long duration cams and low rpms do not lead to reliable o2 readings at part throttle. Try ignoring the o2 and lean it out till driveability suffers and then go back up. What is the map at cruse ? As mentioned part throttle timing is critical.