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9krpmrx8's Boost Build Thread

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Old 04-27-2013, 08:40 PM
  #3476  
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Originally Posted by Brettus
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 .
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 ...
Old 04-27-2013, 09:59 PM
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Originally Posted by TeamRX8
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 ...
You really think a short 3 " coupler (pre maf) on a Greddy intake is going to make a difference when most of the system is already 2 1/4" (post maf) ?????????? ...............what a load of bollocks . You are so tied up in your theories you forget reality and common sense.


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.
Old 04-28-2013, 12:18 AM
  #3478  
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Originally Posted by slash128
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.
Every filter I've seen that's 3.5" sits/rest the bottom half of the filter on the crash bar and the bumper covers up a portion as well. Those numbers are good though! When I ran the numbers the filter I designed will work up to 9 Psi flowing a max rate of 627 CFM.

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.
Old 04-28-2013, 09:02 AM
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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.
Old 04-28-2013, 09:24 AM
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Originally Posted by olddragger
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.
It's fairly tight, you will need to extend the maf by about a foot and a half of wiring.

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.
Old 04-28-2013, 01:17 PM
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Originally Posted by olddragger
are yall using oiled or non oiled type filters?

.
Its a proprietary synthetic blend, non-oiled.
Old 04-28-2013, 01:50 PM
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Old 04-28-2013, 03:40 PM
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Teams' ideal turbo pipeing - note the lack of reducers ........

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Last edited by Brettus; 04-28-2013 at 03:47 PM.
Old 04-28-2013, 04:28 PM
  #3484  
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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.
Old 04-28-2013, 04:40 PM
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Originally Posted by 9krpmrx8
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.
Good news!!! Any photos?
Old 04-28-2013, 04:44 PM
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TX

Originally Posted by slash128
Good news!!! Any photos?
We are keeping them under wraps, we don't want certain people copying anything
Old 04-28-2013, 04:53 PM
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Originally Posted by 9krpmrx8
We are keeping them under wraps, we don't want certain people copying anything
Haha lol, good idea!
Old 04-28-2013, 06:06 PM
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Originally Posted by olddragger
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.
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.

Originally Posted by 9krpmrx8
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.
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.

Last edited by kma5783; 04-28-2013 at 06:08 PM.
Old 04-28-2013, 06:28 PM
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Great--thanks man.
Old 04-28-2013, 06:59 PM
  #3490  
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Ya, OD I did the same. Just open up the loom tubing along the drivers side and there is enough MAF wire to bring the sensor out front with length to spare.
Old 04-28-2013, 07:17 PM
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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....
Old 04-28-2013, 09:24 PM
  #3492  
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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.

Originally Posted by Brettus
Teams' ideal turbo pipeing - note the lack of reducers ........

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Old 04-28-2013, 09:51 PM
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Originally Posted by kma5783
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.
Good info, I didnt even think about stripping it back and re-routing the wire!
Old 04-28-2013, 10:16 PM
  #3494  
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Originally Posted by TeamRX8
I also told you that the center port mod was a bust and you had to find that out the hard way. .
I'll give you that - but the dynamics of that situation were way more complex than what we are talking about here . I still figured it was worth trying with the info I had at hand .

Originally Posted by TeamRX8
If you really want to prove me wrong then just do it the way I described and show everyone for yourself.
You are quite right that the way you suggest to do it would help - that was not in dispute . All I was disputing was your dumb comment about the effect of that "reducer".

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.
Old 04-29-2013, 10:44 AM
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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?
Old 04-29-2013, 03:46 PM
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Originally Posted by 9krpmrx8
Do you guys find that boost is consistent each and every run if you make back to back, hard runs?
absolutely 100% consistent .

You need to set your boost cut higher and have a smaller % reduction for starters . But it does sound like oher stuff is going on .....
Old 04-29-2013, 03:56 PM
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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.
Old 04-29-2013, 04:59 PM
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Sifu's car will never be finished. Just get one
Old 04-29-2013, 06:23 PM
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Originally Posted by 9krpmrx8
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.
If I was able to fit it with a GT3076R stuffed in there, then you should have no problem.

JUST DO IT!!!!
Old 04-29-2013, 07:42 PM
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Originally Posted by 9krpmrx8
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?


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


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