Turbo plans for my SE
Thread Starter
P.I.M.P
Joined: Aug 2004
Posts: 185
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From: Surrey
Turbo plans for my SE
ok here i go
- Running megasquirt ECU, which controls all FUEL and air (aka STANDALONE)... can handle up to 16 injectors
- S4 T2 STOCK turbo running stock boost of 5.5 lbs, which is like running like 7-8 lbs on a T2 (engine can handle up to 10lbs, which is like running 13-15lbs on a T2)
- 2.5 inch JDM down pipe, no cat
- 2.5 inch exhaust
- S4 intake, running 460cc primaries, and 680cc secondaries
- 87 Supra Front mount Intercooler
- 2.5 inch Intercooler piping
- No more AFM due to MS(megasquirt)
- T2 Fuel pump
- Oil comming from the bottom of the oil filter (oil pressure senders been T'd)
- Oil return line welded into oil pan
- Coolant coming from firewall (T'd at the heatercore going into the cambin)
- Coolant return going into the heater core return right by the rad
- Replica Turbo XS BOV
- Fabed up a spacer so the turbo can fit (lower intake manifold in the way), Fab'd by Gladmann Performance
- All going to be tuned by Forcefec, and there dyno
i dont think i forgot anything... so believe me i WILL NOT blow up my engine, the only way i'll blow my engine is if i dont hacve enough fuel...
thanks
Cory
- Running megasquirt ECU, which controls all FUEL and air (aka STANDALONE)... can handle up to 16 injectors
- S4 T2 STOCK turbo running stock boost of 5.5 lbs, which is like running like 7-8 lbs on a T2 (engine can handle up to 10lbs, which is like running 13-15lbs on a T2)
- 2.5 inch JDM down pipe, no cat
- 2.5 inch exhaust
- S4 intake, running 460cc primaries, and 680cc secondaries
- 87 Supra Front mount Intercooler
- 2.5 inch Intercooler piping
- No more AFM due to MS(megasquirt)
- T2 Fuel pump
- Oil comming from the bottom of the oil filter (oil pressure senders been T'd)
- Oil return line welded into oil pan
- Coolant coming from firewall (T'd at the heatercore going into the cambin)
- Coolant return going into the heater core return right by the rad
- Replica Turbo XS BOV
- Fabed up a spacer so the turbo can fit (lower intake manifold in the way), Fab'd by Gladmann Performance
- All going to be tuned by Forcefec, and there dyno
i dont think i forgot anything... so believe me i WILL NOT blow up my engine, the only way i'll blow my engine is if i dont hacve enough fuel...
thanks
Cory
Last edited by rx7male; Jun 26, 2005 at 10:22 PM.
Originally Posted by TurboSE
^^^(high compression rotors)^^^
Either way, I view it as boost is boost is boost. If your putting 5 PSI into the engine, youre putting 5 PSI into it, no matter which engine it is. The amount the compessor has to do might change, but either way, its the same amount. In a stock system, the wastegate opens according to manifold pressure, not the pressure in the combustion chamber. So if the turbo is putting 7 PSI into the T2 engine stock, once the manifold pressure reaches 7 PSI, the wastegate will open and bypass the turbo. The same thing would happen on the -SE engine, its going to pressurize the intake to 7 PSI until the stock wastegate opens, which will be the same pressure for the -SE as the T2. The amount of boost that opens the wastegate will not change just because its on a different engine. All youre doing on the -SE engine, is putting too much boost into the engine now unless you can use a manual boost controller to change the amount of boost that opens the wastegate.
Also, you might think about using something larger for your oil to the turbo, that way if its too much you can use reducers and "tune" the amount rather than hope its enough and possibly not have enough. Its easy enough using one of those filter blocks for aftermarket gauges, most of them have a 1/2" sized or similar outlet on them. I know mine did. But, thats just me.
~T.J.
Last edited by RotorMotorDriver; Jun 27, 2005 at 10:50 PM.
Banned. I got OWNED!!!
Joined: Mar 2005
Posts: 564
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From: SF CALI
Originally Posted by RotorMotorDriver
Right, but the -SE has the higher compression rotors, so according to your theroy, wouldnt the boost be more for it than the T2 engine for the same amount of boost?
Either way, I view it as boost is boost is boost. If your putting 5 PSI into the engine, youre putting 5 PSI into it, no matter which engine it is. The amount the compessor has to to might change, but either way, its the same amount. In a stock system, the wastegate opens according to manifold pressure, not the pressure in the combustion chamber. So if the turbo is putting 7 PSI into the T2 engine stock, once the manifold pressure reaches 7 PSI, the wastegate will open and bypass the turbo. The same thing would happen on the -SE engine, its going to pressurize the intake until the stock wastegate opens, which will be the same pressure for the -SE as the T2. The amount of boost that opens the wastegate will not change just because its on a different engine. All youre doing on the -SE engine, is putting too much boost into the engine now.
So, to break it down, just say youre going to run low boost because its a high compression engine. Because the way you have it worded makes it sound like youre trying to say that just because the turbo is on a different engine, its going to be a different amount of boost.
Also, you might think about using something larger for your oil to the turbo, that way if its too much you can use reducers and "tune" the amount rather than hope its enough and possibly not have enough. Its easy enough using one of those filter blocks for aftermarket gauges, most of them have a 1/2" sized or similar outlet on them. I know mine did. But, thats just me.
Either way, I view it as boost is boost is boost. If your putting 5 PSI into the engine, youre putting 5 PSI into it, no matter which engine it is. The amount the compessor has to to might change, but either way, its the same amount. In a stock system, the wastegate opens according to manifold pressure, not the pressure in the combustion chamber. So if the turbo is putting 7 PSI into the T2 engine stock, once the manifold pressure reaches 7 PSI, the wastegate will open and bypass the turbo. The same thing would happen on the -SE engine, its going to pressurize the intake until the stock wastegate opens, which will be the same pressure for the -SE as the T2. The amount of boost that opens the wastegate will not change just because its on a different engine. All youre doing on the -SE engine, is putting too much boost into the engine now.
So, to break it down, just say youre going to run low boost because its a high compression engine. Because the way you have it worded makes it sound like youre trying to say that just because the turbo is on a different engine, its going to be a different amount of boost.
Also, you might think about using something larger for your oil to the turbo, that way if its too much you can use reducers and "tune" the amount rather than hope its enough and possibly not have enough. Its easy enough using one of those filter blocks for aftermarket gauges, most of them have a 1/2" sized or similar outlet on them. I know mine did. But, thats just me.
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I think he is trying to say 5 psi equals 7? on a TII B/C the compression ratio is higher......Duh!
If he simply means that 5 PSI on the -SE engine equals 7 PSI on the T2 engine because its the "safe boost pressure" for both engines, then that would make sense. I just dont understand how hes saying 5.5 PSI = 7 PSI. Even if the space the pressure is in is a different size, the pressure will still be the same. Think of balloons. If you have a small sized water ballon with 7 PSI in it, we will say its "full". Now put 7 PSI in a larger party balloon. Its still going to be 7 PSI, just not as "full".
~T.J.
Mr.SEBoost
Joined: Oct 2003
Posts: 130
Likes: 0
From: Florida
Your looking at two different things as one. Boost is pressure, yes 7psi is 7psi regaurdless. That is what the compressor is putting out. But when you look at engine displacment that is another theory. Higher comprssion takes less to make one full rotation of the rotors. So when inplying 1psi of boost you have created more force to assist in that full rotation. The compression has alot to do with the apex seals and the coner seals. On the T2, it allows some blow by which doesnt create as much pressure in each chamber. Same on a piston car the piston rings control the compression ratio along with the piston head. Look at a syringe to have a understanding. I guess in one way you can look at it as a controled leak. This is the way I am to understand it. If someone to put but another theory im open. ;]
Rotary Enthusiast
Joined: Oct 2001
Posts: 1,022
Likes: 4
From: Ontario, Canada
Originally Posted by rx7male
ok here i go
- Running megasquirt ECU, which controls all FUEL and air (aka STANDALONE)... can handle up to 16 injectors
- S4 T2 STOCK turbo running stock boost of 5.5 lbs, which is like running like 7-8 lbs on a T2 (engine can handle up to 10lbs, which is like running 13-15lbs on a T2)
- 2.5 inch JDM down pipe, no cat
- 2.5 inch exhaust
- S4 intake, running 460cc primaries, and 680cc secondaries
- 87 Supra Front mount Intercooler
- 2.5 inch Intercooler piping
- No more AFM due to MS(megasquirt)
- T2 Fuel pump
- Oil comming from the bottom of the oil filter (oil pressure senders been T'd)
- Oil return line welded into oil pan
- Coolant coming from firewall (T'd at the heatercore going into the cambin)
- Coolant return going into the heater core return right by the rad
- Replica Turbo XS BOV
- Fabed up a spacer so the turbo can fit (lower intake manifold in the way), Fab'd by Gladmann Performance
- All going to be tuned by Forcefec, and there dyno
thanks
Cory
- Running megasquirt ECU, which controls all FUEL and air (aka STANDALONE)... can handle up to 16 injectors
- S4 T2 STOCK turbo running stock boost of 5.5 lbs, which is like running like 7-8 lbs on a T2 (engine can handle up to 10lbs, which is like running 13-15lbs on a T2)
- 2.5 inch JDM down pipe, no cat
- 2.5 inch exhaust
- S4 intake, running 460cc primaries, and 680cc secondaries
- 87 Supra Front mount Intercooler
- 2.5 inch Intercooler piping
- No more AFM due to MS(megasquirt)
- T2 Fuel pump
- Oil comming from the bottom of the oil filter (oil pressure senders been T'd)
- Oil return line welded into oil pan
- Coolant coming from firewall (T'd at the heatercore going into the cambin)
- Coolant return going into the heater core return right by the rad
- Replica Turbo XS BOV
- Fabed up a spacer so the turbo can fit (lower intake manifold in the way), Fab'd by Gladmann Performance
- All going to be tuned by Forcefec, and there dyno
thanks
Cory
Oil taken from the pressure sensor port is _before_ the filter. If you use an adpater block between the filter and rear iron you can feed the turbo nice clean filtered oil.
Turbo return oil should be fed above oil level in the sump, and be as direct and large in diameter as practical. This is a standard recommendation of all turbo suppliers. The factory decided the front cover was the best location, so why not follow their lead. You might dump oil in the pan and get away with it, but that'd be due to good luck rather than good judgement.
Also spend some time reading up on wastegate porting. Maintaining that 5.5 psi limit stated above could be a challenge.
Roger.
is this the link that u were talkin bout pinkfloyd http://fc3spro.com/TECH/HOWTO/KWG/kwg.html
the only thing that i can find on the s4 is this but i dont know how much it will helps its got dimentions and ***** http://www.zaxjax.com/TIIWastegatePorting.htm
not sure anymore
Joined: Aug 2003
Posts: 1,182
Likes: 0
From: leawood,kansas
That’s not the link i was talking about.
I would say take the flapper out unless you can find a way to use the flapper on your car. It uses vacuum from some emissions crap on the s4 i think. Basically it would be to much work to make it work for what little it does to help, but that’s just my opinion. Some people think it helps, but i would rather loose the weight and free up some engine bay room.
TAKE IT OFF
ps do you have a s4 mani...i have one sitting around i could ship you?
I would say take the flapper out unless you can find a way to use the flapper on your car. It uses vacuum from some emissions crap on the s4 i think. Basically it would be to much work to make it work for what little it does to help, but that’s just my opinion. Some people think it helps, but i would rather loose the weight and free up some engine bay room.
TAKE IT OFF
ps do you have a s4 mani...i have one sitting around i could ship you?
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