jyeung528

in a double clutch, releasing the clutch pedal in neutral while revving up the engine will spin up the lower gear to allow you to get the faster spinning collar into the lower gear.

if you blip the throttle but the clutch pedal is pressed down and the clutch is disengaged from the transmission, the transmission is still isolated from your engine speed.

is the heel toe method helping in another way? i don't see how it would help.

jyeung528

https://en.wikipedia.org/wiki/Double_clutch_(technique)

The purpose of the double-clutch technique is to aid in matching the rotational speed of the input shaft being driven by the engine to the rotational speed of the gear the driver wishes to select (directly connected to rotating wheels). When the speeds are matched, the gear will engage smoothly and no clutch is required. If the speeds are not matched, the dog teeth on the collar will "clash" or grate as they attempt to fit into the holes on the desired gear. A modern synchromesh gearbox accomplishes this synchronization more efficiently. However, when the engine speed is significantly different from the transmission speed, the desired gear can often not be engaged even in a fully synchronized gearbox. An example is trying to shift into a gear while travelling outside the gear's speed or directional range, such as accidentally into 1st from near the top of 2nd, or intentionally from reverse to a forward gear whilst still moving at speed.

Double clutching, although time consuming, eases gear selection when an extended delay or variance exists between engine and transmission speeds.

Billman250

Yes. For trucks with a 100 pound mainshaft and disc!

It is improper technique in the S2000. The lightweight shaft and disc makes double clutching akin to flapping your arms im an airplane. It is wasteful, unnecessary, and time consuming. It cannot match the effectiveness of a proper heel-toe.

daiheadjai

The hard part is getting the hang of that "proper" part....

jyeung528

well, double clutching is only being advocated for this specific instance of getting the gear into first when the speed differential is making it difficult.

i'm not sure how the mechanics of a heel-toe, when the clutch is disengaged, would help in this situation. but i can mechanically understand how a double clutch maneuver would.

Saki GT

The good rule of thumb is that any time a vehicle is moving, you shift into second, not first. First gear is really about getting the vehicle moving, not for use when in motion, and shifting into it while moving can damage the gear teeth.

Does the S2000's 1st gear even have synchros?

Billman250

All gears are synchronized, including reverse.

s2000Junky

The S2000 is one of the few cars I've owned personally that actually lets you downshift into first gear at speed, IF you know how to downshift properly. The car does 40mph in first gear, and a slew of other more expensive sports cars that will go 50-60mph+ in first. There is enough situations where this is reasonable or required if your racing the car and need to stay in the powerband. But per my prior response to the OP, he is clearly doing it wrong and is doing it in an environment where its simply not needed, so yeah just don't do it, its pointless in his case.