Boost Creeping woes continue
#23
Originally Posted by OuterHeaven
Whoops sorry I actually did not mean pressure ratio but the pressure ratio between the intake manifold and the exhaust manifold (also know as the TIP/IMP ratio). Most stock cars have a TIP/IMP ratio of 2 while race cars actually aim to have a ratio less then 1. What I am really getting at is that if your turbo is flowing well enough then the pressure in the exhaust manifold will be very little and therefore the pressure difference between that exhaust manifold and after the turbo part of the exhaust/atmosphere might not be big enough the allow enough air to pass through the wastegate.
#24
Originally Posted by 318_tC
Whos tuning your car man, and what do they say about it.
How many psi are u running? and what kinda numbers u laying down? you built block at all?
How many psi are u running? and what kinda numbers u laying down? you built block at all?
The block is stock the custom turbo setup was done by www.psiracing.com one of my friends from high school. Lance from Toyomoto put in the AEM and tuned it. The only time I got to dyno it was when it had a boost leak so the boost would not climb as fast now that the leak is fixed I cant really punch it anymore. The problem is that around 4500rpms I was only boosting 8-9psi by the time I got to 7000 it was at 12-13psi. So I did not get the 12-13psi when the car is making its most power at 4500 do you understand? Like that I put down 300whp.
#26
Originally Posted by tcengel
Ok, I may not be seeing this right. From the picture you posted, it looks like the internal wastegate is on your downpipe, not your manifold. It's hard to tell from the picture though.
#28
Originally Posted by 318_tC
12-13psi on stock block YIKES!!!
Id get a new manifold homie...
Id get a new manifold homie...
#29
Originally Posted by 318_tC
12-13psi on stock block YIKES!!!
Id get a new manifold homie...
Id get a new manifold homie...
#30
Originally Posted by Rasta
Originally Posted by tcengel
Ok, I may not be seeing this right. From the picture you posted, it looks like the internal wastegate is on your downpipe, not your manifold. It's hard to tell from the picture though.
#31
Originally Posted by tcengel
Originally Posted by Rasta
Originally Posted by tcengel
Ok, I may not be seeing this right. From the picture you posted, it looks like the internal wastegate is on your downpipe, not your manifold. It's hard to tell from the picture though.
#32
Originally Posted by Rasta
Originally Posted by tcengel
Originally Posted by Rasta
Originally Posted by tcengel
Ok, I may not be seeing this right. From the picture you posted, it looks like the internal wastegate is on your downpipe, not your manifold. It's hard to tell from the picture though.
Seriously though, I think what's happening is the dump is so close to the turbo and it's speeding up the exhaust gas which may be speeding up the turbine. The boost pressure coming from your wastegate is moving a lot quicker than your exhaust. It's a strange thought, but may be the issue. A 44mm Tial should hold just fine though.
I would recommend you call a shop that does big turbo, big boost set-ups often and see what they think. Try Titan Motorsports.
#34
Well I dumped the WG to the atmosphere and still the same issues I have no idea what is going on. I could make a new custom manifold but I don’t know if that is going to fix the problem. I am completely stumped.
#35
Maybe you should call another shop, that deals with ____ like this. Im having my custom manifold made by T1 Race Development here shortly, and im going with a bigger turbo and 3 inch down pipe. Hopefully I dont have the same problem. Are you running a boost controller?
Thread
Thread Starter
Forum
Replies
Last Post
crimson_sinn
Introduction Forum
1
09-25-2015 09:41 PM
ScionLife Editor
Scion News Forum
0
09-24-2015 10:50 PM