engine size and boost creep

[ZDA1728]

I know a bigger engine reduces boost creep but I don't know why and would like to know. Thanks

 

[Dsmkauai]

Huh?!?!? Where are you going to find a bigger engine to reduce boost creep, what the hell you taking about dude??? I've never heard of someone complaining about boost creep and saying oh better swap that bigger engine in. I think you need to rethink your question. Are you asking about exhaust??

 

[ZDA1728]

[ame=http://www.youtube.com/watch?v=ysd8CLzCxWU]400tq/385hp 1998 Eclipse GSX Evo3 16g Dyno - YouTube[/ame]

Look at the first comment.

I apologize the original post should have been. " I recently saw somewhere that a larger displacement engine reduces boost creep and I was puzzled when thinking why it would so I wanted to ask you guys what you think"

 

[JusMX141]

You need to stop believing what you read on Youtube comments, like, yesterday.

 

[ZDA1728]

I usually get all my information on youtube ..

And if they are getting those numbers , they know what they are doing.

 

[2g spyder eclipse]

A monkey with 5k could get 400whp.. Idiots who say shit like that are just trolls. Btw with maintance have you rotated your muffler bearing yet? Is it hard to do?

 

[Spanky_DSM]

Just make sure you boost fluid is good.

Too little will cause lag and turbo wear.

Too much and you'll get boost creep.

Just something to look after.

http://www.dsmtuners.com/forums/newbie-forum/5556-where-can-i-buy-more-boost-fluid.html

 

[2g spyder eclipse]

^ First thing I did when I got my car.

 

[LandSpeed-DSM]

I usually get all my information on youtube ..

And if they are getting those numbers , they know what they are doing.

I know a bigger engine reduces boost creep but I don't know why and would like to know. Thanks

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[delta448]

Boost creep is an undesirable uncontrolled increase in boost pressure. It comes from having way more exhaust flow than the wastegate can handle, thereby increasing exhaust through the turbine wheel and increasing the shaft speed of the turbo further even with the wastegate open. Increasing displacement will increase exhaust flow and make the problem worse.

Instead of trying to eliminate creep, most people will tell you to get more fuel delivery on board and tune for it as long as the turbo is not overspeeding. The E316G and TD05H 20G are notorious for having creep issues, especially with really unrestricted exhaust piping. Porting the wastegate passage and using a larger external wastegate with an open dump is the best way to cure creep, but using a bigger turbine wheel/housing is a better way to increase efficiency.

I know who the owner of that car is and I know his setup was designed to handle any boost creep he might have seen on that small turbo, so he was obviously not concerned about it.