Launching from a roll

[horizontalkev]

I realise Launching from a dig isn't the best for the drivetrain, but how about launching from a roll, Is that worst?

I have recently perfected my launch from a dig @3500rpm... And I have a nice ticket to pay now aswell

 

[leepen]

Like brake boosting

 

[bigbird94]

There is no such thing as a "launch" from a roll. Look in to brake boosting I guess.

 

[horizontalkev]

Brake boosting burns your clutch up doesnt it?

And brake boosting is for autos im pretty sure. I drive a manual transmission

 

[leepen]

Brake boosting burns your clutch up doesnt it?

And brake boosting is for autos im pretty sure. I drive a manual transmission

It would more likly burn up your brakes, and yes its done with a manual

 

[WES_393]

You can brake boost in a manual car while rolling. Applying the brakes increases the amount load on the engine, which spools the turbo. It will accelerate wear on the brake pads and possibly the clutch disk if done aggressively. But your not going to quickly burn up a healthy clutch by lightly brake boosting every now and then.

You may also want to fill out your mods list. If you have the stock transmission and clutch, you want to keep the launching and brake boosting to a minimum.

 

[xxNocturnalxx]

Launching from a roll... Kind of reminds me of double clutching

 

[habitatguy187]

Link will eat you launch from a roll. You have to set what mph to disable anti lag at, so really you could launch from a 5mph roll or so and yeah I'm sure it's better on the drivetrain.

 

[jtmcinder]

Not sure why people are saying that building boost while rolling will do anything to the clutch since your foot is completely off the clutch when you do it. It's called "left-foot braking" and it's rather simple. If you want to involve the clutch as well, then knock yourself out, but I have only two feet, so I've always done it the old-fashioned way.

 

[PotatoFlakeSTi]

Left foot braking is pretty common in racing, and is particularly useful in the ability to quickly exit a corner. It can also be used to build boost by applying load to the engine.

Not sure how it could adversely affect your clutch unless it's already slipping.

 

[gusu]

Launching from a roll... Kind of reminds me of double clutching

Except double clutching is real. I'm not saying you don't know but we have a lot of members on this board that would not realize it was after a post like that.

The term double clutching comes from the old days of unsynchronized transmissions.

The technique was simple.

Clutch in
Shift to neutral
Match engine speed with transmission speed
Clutch in
Shift into desired gear.



But back to the topic. Brake boosting is the only thing involved in a highway pull and that is totally optional. The only other need to know thing is most are done in third gear however if you are trying to stay legal you'd probably be doing a 2nd gear pull.

Off topic, but accelerating fast is technically almost everywhere. Here in Oregon they consider it to be a "acceleration contest" and in California they would nail you with "exhibition of speed". Not surprising but you can still get a ticket for a "acceleration contest" with no one besides the cop around for miles. If you are wondering how the exhibition of speed works in California it's simple. The logic there is "F*** you, you're getting a ticket".

 

[jtmcinder]

Link will eat you launch from a roll. You have to set what mph to disable anti lag at, so really you could launch from a 5mph roll or so and yeah I'm sure it's better on the drivetrain.

The English language called. It accepts your declaration of war.

 

[awd_92laser]

You want to launch ## car build ## drivetrain and do it the right way launch ## ass with the horsepower u make man

 

[AK Maniak]

The term double clutching comes from the old days of unsynchronized transmissions.

The technique was simple.

Clutch in
Shift to neutral
Match engine speed with transmission speed
Clutch in
Shift into desired gear.

Off topic but i'm bored:

While this is true you don't necessarily need the clutch. I almost never use the clutch when shifting because if you know rpm in which the next gear will engage smoothly then the clutch is just going to slow you down.

Any truck driver who has some experience will tell you the same. Matching RPM's is important, double clutching is not.

 

[horizontalkev]

So applying a load to the motor with the brakes, even if the rpms don't raise much, will spool the turbo? Same concept as why you get more bov discharge while actually in motion (motor under load) rather than just reving the motor in neutral? I'm going to try it out hopefully I do it right, be on the lookout for a tech post in the drivetrain forums later

 

[PotatoFlakeSTi]

So applying a load to the motor with the brakes, even if the rpms don't raise much, will spool the turbo? Same concept as why you get more bov discharge while actually in motion (motor under load) rather than just reving the motor in neutral? I'm going to try it out hopefully I do it right, be on the lookout for a tech post in the drivetrain forums later

Exactly.

 

[horizontalkev]

How do I make post as "resolved"

 

[fenixnr]

Be smart about it, don't hold the brakes too long otherwise they will over heat and that will be no fun trying to slow down.

 

[burkgonzo]

Plus you have an awesome track in Great Bend to race at. Just go there!

 

[White_knight]

Except double clutching is real. I'm not saying you don't know but we have a lot of members on this board that would not realize it was after a post like that.

The term double clutching comes from the old days of unsynchronized transmissions.

The technique was simple.

Clutch in
Shift to neutral
Match engine speed with transmission speed
Clutch in
Shift into desired gear.



But back to the topic. Brake boosting is the only thing involved in a highway pull and that is totally optional. The only other need to know thing is most are done in third gear however if you are trying to stay legal you'd probably be doing a 2nd gear pull.

Off topic, but accelerating fast is technically almost everywhere. Here in Oregon they consider it to be a "acceleration contest" and in California they would nail you with "exhibition of speed". Not surprising but you can still get a ticket for a "acceleration contest" with no one besides the cop around for miles. If you are wondering how the exhibition of speed works in California it's simple. The logic there is "F*** you, you're getting a ticket".

It's weird tho
### I used to b able to double clutch in my RS
And now with my Gst I can't

So applying a load to the motor with the brakes, even if the rpms don't raise much, will spool the turbo? Same concept as why you get more bov discharge while actually in motion (motor under load) rather than just reving the motor in neutral? I'm going to try it out hopefully I do it right, be on the lookout for a tech post in the drivetrain forums later

Correct

 

[horizontalkev]

Plus you have an awesome track in Great Bend to race at. Just go there!

Track or dragstrip? Im already enlisted in a test and tune in March to race the quarter mile, should be fun especially since 70% of the people there are big headed mustang owners .

Be smart about it, don't hold the brakes too long otherwise they will over heat and that will be no fun trying to slow down.

Who needs brakes anymore anyways?

It's weird tho
### I used to b able to double clutch in my RS
And now with my Gst I can't



Correct

I did the brake boosting today and didnt really notice too much, just a slight difference

 

[xxNocturnalxx]

Except double clutching is real. I'm not saying you don't know but we have a lot of members on this board that would not realize it was after a post like that.

The term double clutching comes from the old days of unsynchronized transmissions.

The technique was simple.

Clutch in
Shift to neutral
Match engine speed with transmission speed
Clutch in
Shift into desired gear.

Um, these cars are not from the old days

 

[destruckeclipse]

Off topic, but accelerating fast is technically almost everywhere. Here in Oregon they consider it to be a "acceleration contest" and in California they would nail you with "exhibition of speed". Not surprising but you can still get a ticket for a "acceleration contest" with no one besides the cop around for miles. If you are wondering how the exhibition of speed works in California it's simple. The logic there is "F*** you, you're getting a ticket".

Man that made my day!

I did the brake boosting today and didnt really notice too much, just a slight difference

I would bet your probably on the stock turbo from the lack of mods listed in your profile (none). Brake boosting is generally done on big turbos, the t2-small will spool fast enough you don't really get any benefit from brake boosting it, at all, in my opinion anyways.

 

[horizontalkev]

I have a T28 of some sort. I did the brake boosting again the other day, this time in 3rd gear, and Noticed a much bigger difference. Before I knew it I was going 20 over the speed limit (55 in a 35) soo thanks guys for the $120 ticket :thumbup: haha

 

[TheFallen]

I have a T28 of some sort. I did the brake boosting again the other day, this time in 3rd gear, and Noticed a much bigger difference. Before I knew it I was going 20 over the speed limit (55 in a 35) soo thanks guys for the $120 ticket :thumbup: haha

Thats a pretty cheap ticket. Back home in Georgia that would be close to 300 bucks.