Race-Bred: A Brief History Of The Chevrolet 409...
http://www.roadkill.com/race-bred-brief ... t-409-409/
I guess the 1962-1963 Chevrolet is where the 1965-66 Corvair Corsa silver cove area came from...
Actually, building a 409 for my 63 Convertible right now, or should I say 438 as it is actually a 348 that has been stroked and bored 30 over. Going with Aluminum heads and dual 4 barrels and all the stickers to make it look like a 409/425 hp engine to anybody that doesn't know how to read block numbers.
What do you mean by 'push'?joelsplace wrote: ↑Thu Dec 17, 2020 9:57 am The LM tends to push in tight low speed corners more than the EM and I hate push.
https://drivingfast.net/oversteer/
Four stages of oversteerOversteer is more exciting than understeer and like most exciting things (such as jumping off cliffs) there is an element of risk involved. Most ‘driver’s cars’ have a tendency to oversteer when on the limit around corners, and this property can be found in a variety of vehicle layouts and drive formats.
- The car has turned in normally and is aiming towards the apex.
- The rear wheels have started to lose adhesion, the driver compensates by steering left to keep steering aligned to the desired driving line (counter steering, explained below).
- The driver has maintained control of the car and continues to follow the desired line.
- The car is at the limit of left hand lock, a spin is likely at this stage unless dramatic corrections are made.
Perhaps he meant that he enjoys the oversteer handling nature of a rear-engine Corvair, and that oversteer is more-easily induced in the swing-axle EM Corvair than it is in a LM Corvair, because of the improved rear traction in the redesigned LM rear suspension.mdh157 wrote:What do you mean by 'push'?joelsplace wrote: Thu Dec 17, 2020 11:57 am
The LM tends to push in tight low speed corners more than the EM and I hate push.
In a high-horsepower front engine performance car, oversteer can be induced by applying excess horsepower to the rear wheels, to break rear traction intentionally with horsepower (inducing oversteer). This is not easily done in a relatively low-horsepower small engine Corvair, and it is also not necessarily desirable to back-off the throttle or apply the brakes in a turn to induce oversteer in a turn, since the Corvair lacks horsepower to make up for speed lost by braking or backing off of the throttle in a turn when exiting out of the turn. The swing-axle EM Corvair, with its relatively poor rear camber control, is easier to induce oversteer in a hard low-speed corner, which may be the fun referred to when driving an EM Corvair. A front-engine car tends to "push", or "plough" as the heavy front end tends to resist a direction change in a turn.
Rear engine, rear wheel drive
Causes, and likelihood of oversteer for a rear wheel drive, rear engine car
Cause of oversteer — Likelihood of oversteerRear engine, rear wheel drive vehicles such as the Porsche 911 can oversteer for different reasons to front engine varieties. In this case most of the vehicle weight is over the rear wheels, leading to greater levels of natural grip at the back, which should lead to an inherent low risk of oversteer. However, there is another force at work here – momentum. Objects with greater mass carry more momentum and are harder to change direction at speed. In the case of rear engine cars, the rear has more momentum than the front which can lead to a greater risk of oversteer as a result of braking or lifting off mid corner.
- Entering the corner too fast — High
- Accelerating early or aggressively — Medium
- Lifting off the throttle — High
- Braking — High
Four stages of understeer
https://drivingfast.net/understeer/
Ploughing into a corner too fast
If you have attempted to take a corner too fast, have turned the steering wheel, and find yourself running wide, you my friend are in a spot of bother. But before you close your eyes and hope for the best, all may not be lost. You’ve exceeded all of the available grip, yes, but it may be possible to actually increase the level of grip by the slightest, smoothest dab on the brakes. “The brakes?!”, I hear you shout, “but surely that is adding to the demands of the tyres, not reducing them?”. This is very true, but if you’re not totally out of control by pressing the brakes you’re causing the weight to transfer to the front, and thus artificially increasing the levels of adhesion at the wheels. This may, however, not work. The moral is to enter the corner at a slower speed, then get on the power early on the way out.
Yes, I agree with that! Controlled oversteer is a blast!Rick's 65 turbo wrote: ↑Mon Apr 19, 2021 6:28 pm "oversteer scares passengers,
understeer scares drivers...."
Goals!!! Got the 64 in garage just need the 65 CORSA nextTrip wrote: ↑Tue Feb 15, 2011 8:07 am Show these guys some EM coupes with wide wheels, fat tires, and an aggresive stance. That is what changed my mind about earlies. Kinda wish it didn't, then I wouldn't have to find myself a spyder coupe to restore!
Gotta say, I really like having one early and one late in the garage =)