Jump to content
The mkiv Supra Owners Club

Just gone BPU - Not sure it's boosting fully


JohnnyW

Recommended Posts

Guest Artermis
Ok I'll try it without the RR in. I know as was mentioned previously that RR's aren't an exact science. But it's a 1.2 bar Envy RR that's in place so thought I'd at least see it hitting 0.9 of full boost.

 

 

if my math is right its only about 1.5 psi to 0.1 bar, so the difference between 0.8 and 0.9 is pretty small.

 

we dont wanna be annoying, but the biggest veriable right now is the restrictor ring and its probably one of the easiest things to check and eliminate.

 

if you take the RR out and you still only getting 0.8bar then you know its a different problem.

 

worst comes to worst you take the RR out, bury the loud pedal in the bulk head and go flying faster than you've ever been before and still only read 0.8 you know the gauge is duff.

Link to comment
Share on other sites

  • Replies 97
  • Created
  • Last Reply

Top Posters In This Topic

Top Posters In This Topic

Posted Images

Guest MaTTi

Why do you even worry about the gauge showing right or wrong values, you should be able to decide if its on 1.2 or 0.9, its supposed to be a big difference.

 

Keep us posted when you find out the solution.

Link to comment
Share on other sites

Why do you even worry about the gauge showing right or wrong values, you should be able to decide if its on 1.2 or 0.9, its supposed to be a big difference.

 

Keep us posted when you find out the solution.

 

Maybe he does'nt want to blow his engine up at a later date:rolleyes:

Link to comment
Share on other sites

Hi Andy, I'm not running a boost controller at the moment.

 

I've got hold of a stock airbox so will be fitting that as the induction kit thats on it looks cheap and crap will also try removing the RR will see if it makes a difference, not holding my breath though.

Link to comment
Share on other sites

Hi Andy, I'm not running a boost controller at the moment.

 

I've got hold of a stock airbox so will be fitting that as the induction kit thats on it looks cheap and crap will also try removing the RR will see if it makes a difference, not holding my breath though.

 

it`s a boost gauge you have and not controller. haha no wonder nobody else mentioned this.

I`ll get me coat

/vbb/images/smilies/bbcode_oops.gif
Link to comment
Share on other sites

Alrighty time for another update. Managed to get a stock airbox (Thanks Sedge) fitted it tonight. They're a bloody tight fit aren't they! Another one of those two minute jobs that turns out a lot longer.

 

It's now boosting slightly higher than it was before but still a good bit away from BPU levels. Guess the next step is to remove the RR and see what affect that has.

 

Good to get the stock airbox on though, feel a lot happier now i'm rid of that pile of sh!t that was on there before. Temps seem slightly lower and boost is slightly higher so that's definitely a good thing :D

Link to comment
Share on other sites

  • 4 weeks later...

Yeah it's been replaced. Really stumped on this now I have no idea what could stop it reaching 1.2 bar, state of play at the moment is:

 

FCD

Envy decat pipes

Motoria 3" catback exhaust

Walbro pump

Stock SMIC

No restrictor ring

Iridium plugs

Link to comment
Share on other sites

Definite fail - that's not true.

 

I'd suggest getting a boost controller - if you don't want to invest in an electronic one to start with, try a manual one to see if it helps - you can pick these up for about a tenner so no biggy, and could change to an electronic one if it works out.

 

ps. are you sure the second turbo is coming on?

Link to comment
Share on other sites

2nd Turbo is definitely kicking in, I've got the whiplash to prove it :D

 

Love the difference in the car after decatting, soo much more responsive and quicker spooling. Even at just under 1 bar the power difference is phenomenal I'm desperate to get up to 1.2 bar to see how insane it is :eyebrows:

Link to comment
Share on other sites

Is that what Andy told you?

 

Mike

 

 

Yes - it is.

 

He had my car in for two weeks - fully decatted but only reaching standard boost level with an EBC fitted. The only way he could get it to boost any higher was to fit a less restrictive exhaust - in other words, the EBC couldn't increase the level of boost because the car wasn't capable of reaching that level without the EBC. If you know different and can prove it, I will gladly pay you to sort my bloody car out, because I have spent a reasonable amount of money trying to do this already to no avail.

Link to comment
Share on other sites

This is the point though isn't it ? Think about it logically - you buy yourself a standard car & you want to increase the performance, so the first thing you do is all the BPU mods, the main one being to remove the cats in order to allow the boost to increase.

If a boost controller is capable of increasing the boost to whatever level you desire, then why does everyone remove the cats from their cars if it is not necessary (and thus technically making them illegal to drive on our roads) ?

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. You might also be interested in our Guidelines, Privacy Policy and Terms of Use.