9krpmrx8's Boost Build Thread
#3476
No respecter of malarkey
iTrader: (25)
The best intake is always going to be the least restrictive one . Problem with the greddy is that we are limited by the tube just prior to the turbo . Without modifying the engine mount 60mm ID is about as big as you can get . So obsessing about a (3"?)reducer upstream of that which is actually a much larger diameter is kinda pointless .
Until then it would still be best to minimize the restrictions as much as possible. It's not pointless at all, but rather emphasizes how little you understand the basic engineering principles behind the ideas. It may have been fine for the original Greddy intent of boost & power. Whether you realize it or not it has to be holding your effort back some in the quest to squeeze it for all its worth.
Did you honestly think it was simple as throwing in a larger compressor wheel and it magically makes full use of it while trying to suck intake air in through a straw? Ok then ...
#3477
Boosted Kiwi
iTrader: (2)
Funny, could have sworn I'm not the one obsessing over the numbers and who's are the highest I would get rid of the mount too, but that's another subject for another thread.
Until then it would still be best to minimize the restrictions as much as possible. It's not pointless at all, but rather emphasizes how little you understand the basic engineering principles behind the ideas. It may have been fine for the original Greddy intent of boost & power. Whether you realize it or not it has to be holding your effort back some in the quest to squeeze it for all its worth.
Did you honestly think it was simple as throwing in a larger compressor wheel and it magically makes full use of it while trying to suck intake air in through a straw? Ok then ...
Until then it would still be best to minimize the restrictions as much as possible. It's not pointless at all, but rather emphasizes how little you understand the basic engineering principles behind the ideas. It may have been fine for the original Greddy intent of boost & power. Whether you realize it or not it has to be holding your effort back some in the quest to squeeze it for all its worth.
Did you honestly think it was simple as throwing in a larger compressor wheel and it magically makes full use of it while trying to suck intake air in through a straw? Ok then ...
BTW - I have done all that I can to minimize the restrictions in the stock system without totally redesigning the whole thing so It's not like I don't understand the concept or I would not have bothered.
Last edited by Brettus; 04-27-2013 at 11:07 PM.
#3478
WENTGERMAN
iTrader: (6)
Thanks. I guess I left out what I was ultimately trying to show is flow with a big filter in that area between the crash bar and under the bumper does not seen to be that big of a concern. We are pulling logs with 400+ g/s. Sure the scale may not be spot on, but I don't think the filter size/location is posing a problem. Not trying to thread jack, just sharing if it helps.
I actually worked with a company that makes in-line filters for heavy equipment and air filters for autos and bikes. The design we came up with has almost as much surface area as the stock air filter and allows all sides of the filter to pull in air.
The 3.5" diameter is a sacrifice but It seems to be worth it so far. As I said the kinks are being worked out and the design is in the early stages.
#3479
Registered
iTrader: (3)
are yall using oiled or non oiled type filters?
For a comparative/informational read concerning pre turbo/supercharger air flow go to kenne bells site.
Question? Does the the oem wiring harness have enough length of wire to route the maf outside
( once you dissect it), or do you have to add to it?
I would like to place my maf outside the engine bay also, but I am not fond of adding wires to the maf.
For a comparative/informational read concerning pre turbo/supercharger air flow go to kenne bells site.
Question? Does the the oem wiring harness have enough length of wire to route the maf outside
( once you dissect it), or do you have to add to it?
I would like to place my maf outside the engine bay also, but I am not fond of adding wires to the maf.
#3480
WENTGERMAN
iTrader: (6)
are yall using oiled or non oiled type filters?
For a comparative/informational read concerning pre turbo/supercharger air flow go to kenne bells site.
Question? Does the the oem wiring harness have enough length of wire to route the maf outside
( once you dissect it), or do you have to add to it?
I would like to place my maf outside the engine bay also, but I am not fond of adding wires to the maf.
For a comparative/informational read concerning pre turbo/supercharger air flow go to kenne bells site.
Question? Does the the oem wiring harness have enough length of wire to route the maf outside
( once you dissect it), or do you have to add to it?
I would like to place my maf outside the engine bay also, but I am not fond of adding wires to the maf.
If you are doing it for the sole purpose of reading colder IAT's I would recommend getting a separate GM/Ford sensor and putting it on the cold side of your system.
I don't know what sensor is needed but I know its been done.
#3484
SARX Legend
Thread Starter
iTrader: (46)
Well if Hoss-05's new engine mount bracket and mount (looks perfect) works out well then I will have one fabbed up for me and then I will be able to get a larger diameter pipe all the way the to the turbo. That is the ultimate goal.
#3485
#3488
Registered
iTrader: (7)
When I did my wire tuck I pulled the wiring back, it was long enough to reach all the way to the Passenger Side Strut tower, so it would be plenty of wire to get the MAF relocated behind the bumper.
My intake piping is 2.75" to match the turbo inlet and I had to dent in the pipe a little to get it to fit for now.
Last edited by kma5783; 04-28-2013 at 06:08 PM.
#3491
Registered
iTrader: (3)
shouldnt be that hard and it will solve my heat buildup in slow traffic etc.
With the maf pipe inside, closer to the TB and with a cai like most others--- I never could get smooth air past the sensor during the higher rpms. It wasn't bad, only a few cells, but those do go away when i take the cold air part off.
BUT, at stoplights etc, and now that the weather is warmer ( 80's) my iat can get hotter than the air entering the combustion chamber. My intercooler works ok ( water/air).
Anyway thats not a good thing so I do need to fix it.
Appreciate the knowledge boys--rotor on....
With the maf pipe inside, closer to the TB and with a cai like most others--- I never could get smooth air past the sensor during the higher rpms. It wasn't bad, only a few cells, but those do go away when i take the cold air part off.
BUT, at stoplights etc, and now that the weather is warmer ( 80's) my iat can get hotter than the air entering the combustion chamber. My intercooler works ok ( water/air).
Anyway thats not a good thing so I do need to fix it.
Appreciate the knowledge boys--rotor on....
#3492
No respecter of malarkey
iTrader: (25)
It was already apparent that you had nothing intelligent to add to the discussion. I also told you that the center port mod was a bust and you had to find that out the hard way. If you really want to prove me wrong then just do it the way I described and show everyone for yourself.
#3493
WENTGERMAN
iTrader: (6)
There's plenty of wiring to relocate it almost anywhere in that area.
When I did my wire tuck I pulled the wiring back, it was long enough to reach all the way to the Passenger Side Strut tower, so it would be plenty of wire to get the MAF relocated behind the bumper.
I need one too!
My intake piping is 2.75" to match the turbo inlet and I had to dent in the pipe a little to get it to fit for now.
When I did my wire tuck I pulled the wiring back, it was long enough to reach all the way to the Passenger Side Strut tower, so it would be plenty of wire to get the MAF relocated behind the bumper.
I need one too!
My intake piping is 2.75" to match the turbo inlet and I had to dent in the pipe a little to get it to fit for now.
#3494
Boosted Kiwi
iTrader: (2)
A 2.25" ID pipe is approx. 1/2 the area of a 3" ID pipe and the 3" pipe is about 1/12th of the length of the 2.25" (2" vs 24" long approx.)
Ponder that ................. Do you still think the "reducer" will have a consequential negative effect ? If you do , how about doing some calcs based on say 350g/s flow and compare the pressure drop between the two.
Last edited by Brettus; 04-28-2013 at 10:18 PM.
#3495
SARX Legend
Thread Starter
iTrader: (46)
Question for boosted guys:
I am having some boost issues and I am still fine tuning my controller. Sometime if I get into it the boost builds quick, and gets to 9-10psi and holds fine until it start to drop off at high RPM's. Normal I know.
But then sometimes I get into it and boost spikes and hits boost cuts which then causes my controller to drop boost to a certain percentage (I have it set at 25%, default is 100%) and then I only hold 2-3psi to red line and sometimes less. Then sometimes I get on it and it does something in between like 5-6psi across the rev range.
But I find that if I roll into the throttle rather than stabbing the pedal it does just fine, boost builds consistently almost every time.
But should it be so finicky concerning throttle control? Do you guys find that boost is consistent each and every run if you make back to back, hard runs?
I am having some boost issues and I am still fine tuning my controller. Sometime if I get into it the boost builds quick, and gets to 9-10psi and holds fine until it start to drop off at high RPM's. Normal I know.
But then sometimes I get into it and boost spikes and hits boost cuts which then causes my controller to drop boost to a certain percentage (I have it set at 25%, default is 100%) and then I only hold 2-3psi to red line and sometimes less. Then sometimes I get on it and it does something in between like 5-6psi across the rev range.
But I find that if I roll into the throttle rather than stabbing the pedal it does just fine, boost builds consistently almost every time.
But should it be so finicky concerning throttle control? Do you guys find that boost is consistent each and every run if you make back to back, hard runs?
#3497
SARX Legend
Thread Starter
iTrader: (46)
I have two modes, I set the second mode up to 12psi max and reduced the boost cut percentage to 25%. I will test it out after work. I still think I need a new wastegate actuator, no telling how old mine is. I am just waiting on Sifu to fit the Turbosmart one and see how it fits.
#3500
Modulated Moderator
iTrader: (3)
Question for boosted guys:
I am having some boost issues and I am still fine tuning my controller. Sometime if I get into it the boost builds quick, and gets to 9-10psi and holds fine until it start to drop off at high RPM's. Normal I know.
But then sometimes I get into it and boost spikes and hits boost cuts which then causes my controller to drop boost to a certain percentage (I have it set at 25%, default is 100%) and then I only hold 2-3psi to red line and sometimes less. Then sometimes I get on it and it does something in between like 5-6psi across the rev range.
But I find that if I roll into the throttle rather than stabbing the pedal it does just fine, boost builds consistently almost every time.
But should it be so finicky concerning throttle control? Do you guys find that boost is consistent each and every run if you make back to back, hard runs?
I am having some boost issues and I am still fine tuning my controller. Sometime if I get into it the boost builds quick, and gets to 9-10psi and holds fine until it start to drop off at high RPM's. Normal I know.
But then sometimes I get into it and boost spikes and hits boost cuts which then causes my controller to drop boost to a certain percentage (I have it set at 25%, default is 100%) and then I only hold 2-3psi to red line and sometimes less. Then sometimes I get on it and it does something in between like 5-6psi across the rev range.
But I find that if I roll into the throttle rather than stabbing the pedal it does just fine, boost builds consistently almost every time.
But should it be so finicky concerning throttle control? Do you guys find that boost is consistent each and every run if you make back to back, hard runs?
What kind of controller?...how is it plumbed?....int wastegate?...sounds like your spring or actuator is weak. When you build slow it is OK..when you hit it hard it overpowers the gate and it opens earlier than it should