My car crushing lap record on Swedens no 1 track
07-09-2014, 06:51 AM
#91
Nordschleife Master
Thread Starter
"Upgrading" from a GTX turbo? Hmmm I'm veeery sceptical 
From what I've seen of the Precision internal parts they cannot be compared to a GT/GTX turbo. And I won't go over 750 hp so I will stay with this turbo 
From what I've seen of the Precision internal parts they cannot be compared to a GT/GTX turbo. And I won't go over 750 hp so I will stay with this turbo
07-09-2014, 07:12 AM
#92
Nordschleife Master
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07-09-2014, 03:04 PM
#93
Drifting
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Gustaf:
I am getting ready to order my GTX3582, with Tial V-Band turbine housing. You are using the 1.03 A/R housing correct? Since my car is more for the street, I was thinking maybe the optional smaller compressor housing might be better for my application. It can be ordered with a GT3076R T04E frame 4" inlet, 2" outlet with built in anti surge compressor housing. Any thoughts/opinions?
I am getting ready to order my GTX3582, with Tial V-Band turbine housing. You are using the 1.03 A/R housing correct? Since my car is more for the street, I was thinking maybe the optional smaller compressor housing might be better for my application. It can be ordered with a GT3076R T04E frame 4" inlet, 2" outlet with built in anti surge compressor housing. Any thoughts/opinions?
07-10-2014, 04:15 AM
#95
Rennlist Member
Thom, Eric has a big bore motor in the works but I am of the opinion that while you could run that turbo easily enough, I would opt for a bit smaller for a 3Lt road car. Maybe the GT3076 or GTX3076. You would know more than me but I think the 'X' series turbos seem to want to be boosted quite high. I'd like to try my old GT3076.82 on a 3Lt motor.
07-10-2014, 04:26 AM
#96
Ah ok, a GTX35 should be ok then.
I have been back in the ghetto of mid range debauchery... errr I mean been running the stock intake again since last week end (the short intake is momentarily needed for some "side project"...) and intend to run 1.5 bar again on the GTX3076R 1.06. Curious to see if I start to blow the HG like you do.
I have been back in the ghetto of mid range debauchery... errr I mean been running the stock intake again since last week end (the short intake is momentarily needed for some "side project"...) and intend to run 1.5 bar again on the GTX3076R 1.06. Curious to see if I start to blow the HG like you do.
07-10-2014, 04:44 AM
#97
Rennlist Member
Keep me in the loop on your findings. We are picking up my block tomorrow after the O ringing. Going to have to wait until next week for the new gasket. Really wonder what the GTX35 will be like at 1.8 bar...(read eek...car is pretty fast already at 1.3bar !)
07-10-2014, 04:50 AM
#98
I believe that increasing boost without improving head flow will only put further strain on the short block. You may solve the hg issue on the medium term but over the long term you may damage something else.
I ran 1.6 bar the other day and even if I got no knock thanks to the opened up cam I could still feel a boost level past which the overall breathing ability of the engine decreased, which I'm pretty sure is caused by the flow limits of the head and/or stock headers.
Our respective set ups are I think comparable, even if yours sits of course on a higher level, so I would suggest not going too wild too early with the boost...
I ran 1.6 bar the other day and even if I got no knock thanks to the opened up cam I could still feel a boost level past which the overall breathing ability of the engine decreased, which I'm pretty sure is caused by the flow limits of the head and/or stock headers.
Our respective set ups are I think comparable, even if yours sits of course on a higher level, so I would suggest not going too wild too early with the boost...
Last edited by Thom; 07-10-2014 at 05:15 AM.
07-10-2014, 05:23 AM
#99
Rennlist Member
No, we will be very careful. I'm sure you're right re the stock inlet. We will look at what it looks like on the data. We'd only consider running higher boost down the straight in a bigger event. No use on short tighter tracks.
Be interested when Gustaf runs up a bit more boost on his car though??
Be interested when Gustaf runs up a bit more boost on his car though??
07-10-2014, 08:27 AM
#101
Nordschleife Master
Thread Starter
The GTX3582R is really a 750 hp capable turbo and too big for most applications. But with a big displacement engine in a race car that mostly runs between 4500-7500 rpm it's a very good choice.
Patrick I wouldn't say it seems to like higher boost better than e.g. the GT3582R. But given it's a "larger" turbo it's more efficient at higher flow (e.g. higher boost) than the GT so it can feel that way.
Patrick I wouldn't say it seems to like higher boost better than e.g. the GT3582R. But given it's a "larger" turbo it's more efficient at higher flow (e.g. higher boost) than the GT so it can feel that way.
07-10-2014, 08:41 AM
#102
Rennlist Member
The GTX3582R is really a 750 hp capable turbo and too big for most applications. But with a big displacement engine in a race car that mostly runs between 4500-7500 rpm it's a very good choice.
Patrick I wouldn't say it seems to like higher boost better than e.g. the GT3582R. But given it's a "larger" turbo it's more efficient at higher flow (e.g. higher boost) than the GT so it can feel that way.
Patrick I wouldn't say it seems to like higher boost better than e.g. the GT3582R. But given it's a "larger" turbo it's more efficient at higher flow (e.g. higher boost) than the GT so it can feel that way.
07-10-2014, 05:31 PM
#103
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Finally got the RL App back up and running. Not sure what happened but have not been able to log on for quite a while. My engine will be 3.3L minimum, but hopefully 3.5L. However, I am not looking for a screamer. I will be perfectly happy shifting at 6-6.5K. Looking more for down low torque, which I feel I will have more than enough of. This will not be a track car, just a obnoxiously fast daily driver. Well, if it holds together. Any opinions on which compressor housing to use?
07-10-2014, 05:59 PM
#104
Nordschleife Master
Thread Starter
That's a big motor But to determine turbo size I would also take desired maximum boost, head, camshaft, headers and intake into consideration on top of max rpm. To use the GTX3582R with a smaller compressor housing would seem a bit counter productive to me. I would run a smaller turbo and likely have a quicker car.
But to determine turbo size I would also take desired maximum boost, head, camshaft, headers and intake into consideration on top of max rpm. To use the GTX3582R with a smaller compressor housing would seem a bit counter productive to me. I would run a smaller turbo and likely have a quicker car.