boost creep
9 Second Club
Joined: Nov 2003
Posts: 13,616
Likes: 185
From: Norn Iron
Several guys on here have posted threads where simply coiled a tube and mounted an eBay transducer on the end to be able to log back pressure and then posted boost vs. BP. It's something I should have done with my rear mount, but with a new larger billet turbo being 260 shipped, I jumped straight to the solution that followed my hunch lol.
In a rear mount, I'd be more interested in pressure close to the engine, and then at the turbine. It'd be interesting to see if it does vary as load/rpm increases.
I agree, I could turn it into a huge science project because there's quite a few things that would be interesting. Even the IATs post compressor vs. pre and post FMIC. But I've really just been having fun playing with turbo sizes at the moment and boost levels. The AFR vs. boost has been giving me a good idea of back pressure.
7 Second Club
Joined: Jul 2013
Posts: 240
Likes: 408
From: Crossfield, AB
Looks like same turbo I have, the 94mm with the large turbine is a lot louder then my old setup as well. The compressor is really efficient though, my IAT's dropped 50+* on the same boost.
7 Second Club
Joined: Jul 2013
Posts: 240
Likes: 408
From: Crossfield, AB
I'm not expecting the ait to change much from my 88mm but it would be literally cool if it did. lol
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Verdad Gallardo I'm not running an intercooler so it was a welcome (and somewhat expected) result.
7 Second Club
Joined: Jul 2013
Posts: 240
Likes: 408
From: Crossfield, AB
yup garrett gtx5533r, I don't see why you would need something special for baby cubes, I'm running it with baby cubes as it comes. I have a friend with the FI version, but I'm not a big fan of FI screwing with a perfectly good manufacturers turbo.
I'm not running an intercooler so it was a welcome (and somewhat expected) result.
I'm not running an intercooler so it was a welcome (and somewhat expected) result.
Initial spool testing has been encouraging in 32F outside temps but won't know if the converter needs a restall until the outside temps get to 70F or higher.
Last edited by islander033; Feb 28, 2020 at 01:04 PM. Reason: turbine!
i dont understand why you guys dont understand. why would you want to contol the boost level? what you want to control is cylinder pressure to not destory the engine. i have been observing the tendency to look at the boost level as a god given value for decades. its not.
and awesome, i just wonder, if you have your boos full in @3600, what is your exhaust pressure before turbine @7000?
and awesome, i just wonder, if you have your boos full in @3600, what is your exhaust pressure before turbine @7000?
i cant tell if you are joking or being serious. If youre being serious.....you have alot of learning to do.
i dont understand why you guys dont understand. why would you want to contol the boost level? what you want to control is cylinder pressure to not destory the engine. i have been observing the tendency to look at the boost level as a god given value for decades. its not.
and awesome, i just wonder, if you have your boos full in @3600, what is your exhaust pressure before turbine @7000?
and awesome, i just wonder, if you have your boos full in @3600, what is your exhaust pressure before turbine @7000?
TECH Apprentice
Joined: Nov 2016
Posts: 371
Likes: 18
From: switzerland
awesome, remember centrifugal advance in distributors? here is your "ignition" creep. and frankly a ratio of 2 is pretty poor. another 100 hp waiting for you there.
kfx, did i ever say to eliminate the wastegate? i said it was smart to have increasing boost after torque peak. you can do that with electronics, but why bother if the system does it for you?
btw, iv messed around with blower and turbo cars for 40 years now, and i am very serious about what i post.
kfx, did i ever say to eliminate the wastegate? i said it was smart to have increasing boost after torque peak. you can do that with electronics, but why bother if the system does it for you?
btw, iv messed around with blower and turbo cars for 40 years now, and i am very serious about what i post.
Last edited by Dian; Mar 1, 2020 at 10:00 AM.
You're trying to compare mechanical advance that is an intentional CONTROLLED increase in ignition advance to boost creep which is an UNCONTROLLED uncalculated rise in boost above target psi. Maybe in another 40 years you'll understand the difference.
awesome, remember centrifugal advance in distributors? here is your "ignition" creep. and frankly a ratio of 2 is pretty poor. another 100 hp waiting for you there.
kfx, did i ever say to eliminate the wastegate? i said it was smart to have increasing boost after torque peak. you can do that with electronics, but why bother if the system does it for you?
btw, iv messed around with blower and turbo cars for 40 years now, and i am very serious about what i post.
kfx, did i ever say to eliminate the wastegate? i said it was smart to have increasing boost after torque peak. you can do that with electronics, but why bother if the system does it for you?
btw, iv messed around with blower and turbo cars for 40 years now, and i am very serious about what i post.
9 Second Club
Joined: Nov 2003
Posts: 13,616
Likes: 185
From: Norn Iron
awesome, remember centrifugal advance in distributors? here is your "ignition" creep. and frankly a ratio of 2 is pretty poor. another 100 hp waiting for you there.
kfx, did i ever say to eliminate the wastegate? i said it was smart to have increasing boost after torque peak. you can do that with electronics, but why bother if the system does it for you?
btw, iv messed around with blower and turbo cars for 40 years now, and i am very serious about what i post.
kfx, did i ever say to eliminate the wastegate? i said it was smart to have increasing boost after torque peak. you can do that with electronics, but why bother if the system does it for you?
btw, iv messed around with blower and turbo cars for 40 years now, and i am very serious about what i post.