Don Terrill’s Speed-Talk

The late Joe Sherman told me re: tunnel rams that if the carbs are big you want the plenum box height lower to the runners. If the carbs are "smaller" you want the carbs higher up over the runners. Carb height (and plenum box volume) matter.

In that thought path what about 3X 750's on a custom plenum top.?

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).

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...

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...

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 ...

According to your engine health measurment yardstick you could advance the cam you have now and it will improve
the "health".. Try it.

Change the mufflers. dynomax super turbos are not bad. Add tail pipes, exit at bumper or behind rear wheels.

Evaluate the cam's suitability based on how the car will be used. "too big". for ????

Cranking compression is not bled off by valve overlap.

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 ...

mt-engines wrote: ↑Wed Apr 10, 2024 4:42 pm

HQM383 wrote: ↑Wed Apr 10, 2024 3:58 pm

F-BIRD'88 wrote: ↑Wed Apr 10, 2024 10:09 am
No formula.. 45 years experience.

With your experience if he changed to aluminum heads what would the Octane requirements be then?

Just ignore him.. his experience is 45 years of regurgitated hearsay.

Hardly, fool.

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...

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...

Check the carb flange for flatness first.