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Old 03-25-2012, 08:29 PM   #291 (permalink)
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Quote:
Originally Posted by kach22i View Post
I'm willing to admit that I have no idea how to do this either. Please try to step by step me through this process.

Bent vales and burnt clutches, just say no to engine braking on some cars (like vintage 911's).


You must drive one of those fancy modern cars less than 25 years old.

Vintage does have it's drawbacks, but makes life more interesting too.
Engine braking is quite simple really, downshift when rpm goes near 1000-1500 depending how fast you wish to slow down, blip throttle push clutch in and change gear at same time, if done properly you don't need even a clutch, or just tiny push, there will be no any jerks and ride is smooth, key is rev matching, but that is key when driving manual in any situation where gear shifting is done.

They are doing it wrong if valves are bend and clutch are burning, most of my cars are from 80's.

There are however issue with older carbed cars, they draw fuel like thursty camel when you lift off throttle and engine brake (it really does not need anything else to engine brake, just lift off), before they started to put cutoff solenoids closed throttle caused vacuum and next easier way to get relief of vacuum was to such gasoline, which of course is not good for mileage.

So that is true reason why you don't engine brake with vintage cars as it is more economical to let it idle and use brakes instead.

2nd reason not to engine brake vintage cars is that some tend to eat oil bit more than modern cars when engine braking, all engines are consuming oil when engine braking at high rpm (I guess more than 3000rpm).

With Probe however we can't say that it would classify to any of these, it is too modern to have issues like such, so lifting off and shifting when closing to 1000rpm is good way to slow down if one needs slowing down.

Surely it is easy to destroy engine by shifting to too low gear, but driver should know how to operate vehicle he is driving and if he does know, then he should know how much engine rpm rises with each shift, also max speeds for each gear at least to level where driver is not attempting of shifting 1st gear at 70mph

Semi drivers are using engine braking a lot, they have also jake brake which closes off exhaust to increase engine braking effect, which makes that rather loud sound too, especially with 2 stroke DD it can be epic level of loud, what little I know of them as here in Europe we rarely see any of such, but with my another hobby I have studied quite a bit of mechanics etc of bigger and smaller american vehicles.

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Old 03-25-2012, 09:37 PM   #292 (permalink)
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George, don't worry about it. I very rarely even exceed 3000 rpm in this car...

Had a photoshoot with a professional photographer and model today. Pics coming when he gets around to uploading them. In the mean time here are some I took


Photoshoot by Tyler Linner, on Flickr

And one of yours truly

Photoshoot by Tyler Linner, on Flickr
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Old 03-25-2012, 10:52 PM   #293 (permalink)
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OK guys enough engine braking discussion.


Dazzle by Tyler Linner, on Flickr


Dazzle by Tyler Linner, on Flickr


Dazzle by Tyler Linner, on Flickr


Dazzle by Tyler Linner, on Flickr
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Old 03-25-2012, 11:11 PM   #294 (permalink)
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Quote:
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George, don't worry about it. I very rarely even exceed 3000 rpm in this car...

Had a photoshoot with a professional photographer and model today. Pics coming when he gets around to uploading them. In the mean time here are some I took
That last photo really screams out Detroit in so many ways, I like that one best
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Old 03-26-2012, 12:49 AM   #295 (permalink)
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Don't be surprised if you get a call from the producers of "Mad Max 4: Fury Road".
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Old 03-26-2012, 01:06 AM   #296 (permalink)
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Reminds me of the way car companies try to disguise new models when out in public. I can see it already....Motorweek gets new spy photo of Fords top secret eco hybrid.
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Old 03-26-2012, 04:43 AM   #297 (permalink)
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With all the mods it does kinda resemble the old Probe IV.
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Old 03-26-2012, 05:00 AM   #298 (permalink)
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Reminds me of the way car companies try to disguise new models when out in public. I can see it already....Motorweek gets new spy photo of Fords top secret eco hybrid.
That would be hilarious. Maybe they'd offer me a job lol

Since I couldn't wait to see how the boat tail would look, I made a bit of a sketch model. I feel less guilty working on the computer than out in the garage.

In short, the rear end of it will be so small I'll actually need to make the sides and top of the boattail clear so people can see my taillights. And this is just a 24" (60cm) extension!



Boat Tail Virtual Mockup by Tyler Linner, on Flickr


Boat Tail Virtual Mockup by Tyler Linner, on Flickr


Boat Tail Virtual Mockup by Tyler Linner, on Flickr
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Last edited by Sven7; 03-26-2012 at 05:08 AM..
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Old 03-26-2012, 09:31 AM   #299 (permalink)
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Quote:
Originally Posted by pjbgravely View Post
I had to teach my brother how to engine brake on his first automatic...
I still don't understand how you engine brake with an automatic transmission.

Do you need a tiptronic or similar transmission to do this?

Manumatics?
Manual transmission - Wikipedia, the free encyclopedia
Quote:
Automatic transmissions that allow the driver to manually select the current gear are called Manumatics.
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1977 Porsche 911s Targa
1998 Chevy S-10 Pick-Up truck
1989 Scat II HP Hovercraft

Chin Spoiler:
http://forums.pelicanparts.com/off-t...effective.html

Rear Spoiler Pick Up Truck
http://forums.pelicanparts.com/off-t...xperiment.html

Roof Wing
http://ecomodder.com/forum/showthrea...1-a-19525.html
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Old 03-26-2012, 09:37 AM   #300 (permalink)
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Quote:
Originally Posted by jtbo View Post
........push clutch in
I was asking about automatics, not manual transmissions.

Regarding the high revving engine comment, I agree to be careful. I remember my motorcycle days in the late 1970's and early 1980's. However some engine braking was much better than locking up the rear brake and having the tail come around. Alternately, too much front brake could potentially send you flying over the handlebars. Down-gearing done right, always seemed a bit safer and controlled if not abused or excessive.

Nice portfolio shots Tyler. Maybe you can Photoshop out the handicap symbol in the parking garage shots. That one photographer looks like real character in his short shorts. Any close ups of the girl?

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George
Architect, Artist and Designer of Objects

1977 Porsche 911s Targa
1998 Chevy S-10 Pick-Up truck
1989 Scat II HP Hovercraft

Chin Spoiler:
http://forums.pelicanparts.com/off-t...effective.html

Rear Spoiler Pick Up Truck
http://forums.pelicanparts.com/off-t...xperiment.html

Roof Wing
http://ecomodder.com/forum/showthrea...1-a-19525.html

Last edited by kach22i; 03-26-2012 at 09:44 AM..
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