I'd try the carbs you have and measure intake manifold vacuum at WOT when crossing the stripe.
This is still a bracket racing car right? It won't make you any more money, and the girls will love you just the same.
I would have gone supercharged at the this point. (on methanol).
Search found 9644 matches
- Thu Apr 18, 2024 2:31 pm
- Forum: Engine Tech
- Topic: tunnel ram carb talk
- Replies: 17
- Views: 431
- Thu Apr 18, 2024 2:20 pm
- Forum: Engine Tech
- Topic: Cooling tricks with iron headed hot rods?
- Replies: 9
- Views: 394
Re: Cooling tricks with iron headed hot rods?
Make sure that the chin spoiler is intact. It is essentisl. If your intake manifold has those 2 extra rear water ports back near the diz connect the drivers left side water port to the water outlet on the top os the water pump. VS the stock way they are connected. This helps stablize the thrermostst...
- Tue Apr 16, 2024 2:36 am
- Forum: Engine Tech
- Topic: Resonator placement
- Replies: 21
- Views: 841
Re: Resonator placement
Mufflers don't cause drone noise. Bad design muffiers fails to suppress exhaust drone noise. Lack of tail pipes allow the floor pan to resonate driven by the exhaust sound . Exhaust exit under car is a real bad idea in more ways than one. Net car performance will increase and drone will be eliminate...
- Mon Apr 15, 2024 1:42 pm
- Forum: Engine Tech
- Topic: Resonator placement
- Replies: 21
- Views: 841
Re: Resonator placement
Drone is not caused by baffles in the muffler. Drone is caused when the sound at a specific frequency (engine running speed) excites,vibrates (resonates) the underbody floor pan. Amplified by dual exhaust with same pipe length and muffler position. Especially when the exhaust exits under body. Lack ...
- Mon Apr 15, 2024 10:30 am
- Forum: Engine Tech
- Topic: dynamic compression street cam ( cont...)
- Replies: 11
- Views: 490
Re: dynamic compression street cam ( cont...)
According to your engine health measurment yardstick you could advance the cam you have now and it will improve
the "health".. Try it.
the "health".. Try it.
- Sun Apr 14, 2024 8:57 pm
- Forum: Engine Tech
- Topic: Resonator placement
- Replies: 21
- Views: 841
Re: Resonator placement
Change the mufflers. dynomax super turbos are not bad. Add tail pipes, exit at bumper or behind rear wheels.
- Sun Apr 14, 2024 2:34 pm
- Forum: Engine Tech
- Topic: dynamic compression street cam ( cont...)
- Replies: 11
- Views: 490
Re: dynamic compression street cam ( cont...)
Evaluate the cam's suitability based on how the car will be used. "too big". for ????
- Sun Apr 14, 2024 2:33 pm
- Forum: Engine Tech
- Topic: dynamic compression street cam ( cont...)
- Replies: 11
- Views: 490
Re: dynamic compression street cam ( cont...)
Cranking compression is not bled off by valve overlap.
- Sun Apr 14, 2024 11:39 am
- Forum: Engine Tech
- Topic: l88 drop base
- Replies: 5
- Views: 477
Re: l88 drop base
Yes Remove that breather tube as it hits the carb on many non OEM setups. There were various breather tube locations on the OEM applications over the years.. The carb's fuel bowm vent tubes need to be cut shorter and cut on an angle. Your carb throttle linkage cable bracket will need to be modified ...
- Wed Apr 10, 2024 8:51 pm
- Forum: Engine Tech
- Topic: 11.5 compression, Iron Head, 91 octane
- Replies: 40
- Views: 1724
Re: 11.5 compression, Iron Head, 91 octane
Hardly, fool.mt-engines wrote: ↑Wed Apr 10, 2024 4:42 pmJust ignore him.. his experience is 45 years of regurgitated hearsay.
- Wed Apr 10, 2024 10:09 am
- Forum: Engine Tech
- Topic: 11.5 compression, Iron Head, 91 octane
- Replies: 40
- Views: 1724
Re: 11.5 compression, Iron Head, 91 octane
If all it took was a later closing intake valve a Pro Stock racing engine would run on 87 octane gas. It doesn't. Your engine is going to want 100 R+M/2 octane gas. For street use on a pump gas retard the timing as required to avoid detonation. 4-6-8 deg as needed. Water/methanol injection does won...
- Wed Apr 10, 2024 12:36 am
- Forum: Engine Tech
- Topic: 11.5 compression, Iron Head, 91 octane
- Replies: 40
- Views: 1724
Re: 11.5 compression, Iron Head, 91 octane
If all it took was a later closing intake valve a Pro Stock racing engine would run on 87 octane gas. It doesn't. Your engine is going to want 100 R+M/2 octane gas. For street use on a pump gas retard the timing as required to avoid detonation. 4-6-8 deg as needed. Water/methanol injection does wond...
- Sun Apr 07, 2024 8:38 pm
- Forum: Engine Tech
- Topic: How can I get this to seal?
- Replies: 17
- Views: 1075
Re: How can I get this to seal?
Check the carb flange for flatness first.
- Sat Apr 06, 2024 1:27 pm
- Forum: Engine Tech
- Topic: Leftovers/junk 388 SBC
- Replies: 22
- Views: 1191
Re: Leftovers/junk 388 SBC
This would be a good test engine to examine DV's 128 cam LSA formula. Couple cam swaps. Also interesting to see what a high rise dual plane (rpm air gap) does on this one. Question is: Does a calculated 105 deg LSA cam work better than this 108 LSA cam? Can you get most of the way there by adjustin...
- Fri Apr 05, 2024 2:47 pm
- Forum: Engine Tech
- Topic: Leftovers/junk 388 SBC
- Replies: 22
- Views: 1191
Re: Leftovers/junk 388 SBC
In your dyno tests on this engine with a locked out HEI diz what ignition timing setting created the most torque. What ignition timing setting created the most HP?
How much difference?
How much difference?