TRD S/C + blow off valve

[JvR]

Hi you all,

I have a question:

I drive with a s/c, but i miss the instant boost.

So i thought why not use the 6psi pulley i have and a blow off valve on 4-5 psi.
Is that a working solution (with stock engine). Or is this a not working fantasie

Thanks!

[bigbird]

that funny you mention that. eye8pussies and i had discussed this idea a while back. but it was just a pipe dream and i dont think he looked into it much further.

[JvR]

What i never understand is how the valve on the supercharger works.
(where does the the compressed air go when the valve open)

If there is a electronic device that can messure the pressure, i can use that to open the valve when it is more then 5psi.

[Creeps228]

i believe its not going to work because the excess pressure is already in the manifold...i think a BOV is only for rushing air going to the cylinder, aka turbo, but im not sure i dont mess with either, FOR NOW!...just my .02

[ECale3]

^ uh what? A BOV is for dumping the pressure in charge pipe running into the intake manifold. The goal being to prevent backpressure from causing cavitation against the turbine blades in the compressor housing and ultimately damaging the compressor.

A BOV can be used with a supercharger OR a turbocharger. The TRD supercharger really isn't creating enough boost to warrant a BOV as even the add on pully's create less boost than a CT26 on stock wastegate.

[Eye8Pussies]

lol...like bird said...funny that you should mention it....because theoretically, it's possible...and we were talking about that, and I was considering doing on my extra supercharger since it was just lying around...then I had my accident and the plans went out the window lol

but regardless...the idea was to run a 12psi pulley on the blower...then cut a hole big enough to release pressure in the runners of the blower (leading to the intake manifold), and then weld on a wastegate set at, say...7psi...and since the boost is relative to engine speed (which affects pulley speed), you'll basically always be at 7psi regardless of rpm....basically, once you're in boost, you're doing a good 6-7psi.

the biggest problem with doing this (if it'll work properly at all) is the fact that you'll need one helluva fuel system to keep up...and anybody with an auto tranny will blow their tranny pretty quickly as well

I was considering it...but...hey...somebody else should try it before me...

[JvR]

haha, and then i try after you

I have maybe a other idea.
Use a electronic switch to switch to permanent boost when needed. (closing the valve of the S/C)

[Eye8Pussies]

^ that's not hard to do...but the problem is that boost is still relevant to rpm and load regardless of the actuator being open or closed...so even if you're boosting, 1psi at low rpms is not going to give you any noticeable difference...

but try it and let us know!

[Venom_5]

just twin charge it and call it a day

s/c will spool up the 72mm turbo ^_^

[JvR]

the idea behind it is:

The actuator is open when i cruise. (so now/low boost)
When i floor it, the actuator wil close and will build up the boost.
It take some time to fill the manifold.

When i use a switch and close the actuator before i want boost??


can we not use the actuator to regulate the pressure with a electronic pressure meter/switch? (close < 4psi > open)

[EEngineer]

Originally Posted by Venom_5

just twin charge it and call it a day

s/c will spool up the 72mm turbo ^_^

I LOLed at this idea.
someone gotta be divorced to ever attempt this. would be absolutely nuts

[ECale3]

Originally Posted by Venom_5

just twin charge it and call it a day

s/c will spool up the 72mm turbo ^_^

It would be cool to see, you just would need to seriously lower the 1mz's compression to make it...sane

[Venom_5]

Tony shouldve done it ...

speakin of which - where has he been? his twin turbo should be about ready to roll by this summer i would think

[Eye8Pussies]

Originally Posted by JvR

the idea behind it is:

The actuator is open when i cruise. (so now/low boost)
When i floor it, the actuator wil close and will build up the boost.
It take some time to fill the manifold.

When i use a switch and close the actuator before i want boost??


can we not use the actuator to regulate the pressure with a electronic pressure meter/switch? (close < 4psi > open)

that is not possible....there is no building of boost...the rotors are always turning.

all the actuator does is either lets the air bypass the rotors altogether = no boost, or the actuator allows the air to get pushed by the rotors = boost.

there is no "building up" of boost at anypoint.

the roots supercharger is not like a procharger, which works like a turbo. all a roots type charger does is "push" the air to go faster so that it reaches "4 psi"

[94CoupeV6]

Originally Posted by Venom_5

Tony shouldve done it ...

speakin of which - where has he been? his twin turbo should be about ready to roll by this summer i would think

Tony goin' TT? I haven't been around here much so that's news to me, but definitely good news.