Why should anyone upgrade turbos?
Originally Posted by Ludikraut
Ultimately I think the answer largely depends on the application and platform. For a pump-gas application:
- '03/'04/'05 on a stock block would probably want to go with an Evo IX turbo or TME
- '06 no upgrade really needed
However, in my case, I chose to upgrade (bigger turbo and built block) because I wanted to be able to rev my engine higher and I also wanted better power up top. Ultimately my goal is to have a car that has an ~8500 rpm shift point with a 9000+ rpm redline. Not something the stock turbo or block could ever accomodate. In my case I also found that even the 3071 on pump gas runs out of steam too soon, which is why I'm looking at the 50 trim or 3076. The factory
turbos are fairly well matched to the stock engine, and the IX turbo looks like it is outstanding. I would guess that the IX turbo will be the equivalent of a 3071 on pump gas, given the stock redline: maybe a hair less power, but far better spool.
l8r)
- '03/'04/'05 on a stock block would probably want to go with an Evo IX turbo or TME
- '06 no upgrade really needed
However, in my case, I chose to upgrade (bigger turbo and built block) because I wanted to be able to rev my engine higher and I also wanted better power up top. Ultimately my goal is to have a car that has an ~8500 rpm shift point with a 9000+ rpm redline. Not something the stock turbo or block could ever accomodate. In my case I also found that even the 3071 on pump gas runs out of steam too soon, which is why I'm looking at the 50 trim or 3076. The factory
turbos are fairly well matched to the stock engine, and the IX turbo looks like it is outstanding. I would guess that the IX turbo will be the equivalent of a 3071 on pump gas, given the stock redline: maybe a hair less power, but far better spool.l8r)
The biggest limiter that I see running a big turbo on pump is "effective" compression ratio. i.e. the more air pumped by the turbo the higher the cylinder pressure = more prone to knock on pump. I am just really stuck on what I can run on a DD and still get good performance for the track.
Luda - thanks for all the input. What were your exact impressions of the 3071? This was one of the turbos that I was looking at along with the 3065 and 50 trim.
The extra 300cc of displacement may provide a little more sub-boost torque while in lag. Shouldn't it also shorten lag duration as well? I'd guess so.
You should ask some other 2.3 users for input
You should ask some other 2.3 users for input
Originally Posted by 3240
I made about 480 whp on 91 octane running a 2.3L with an HKS 3240 turbo. It was done on a dynojet so the numbers might be inflated but it sure did feel fast.
Originally Posted by nrcooled
I will be keeping my stroker below 7500RPM so a topend monster won't do me any good. I think the 50 trim will be a good trade-off for me.
For a 2.3L engine running at 90% VE at 7500rpm, you would be looking at something that will top out around 50lb/min airflow running upward of 25psi. If we look at compressor maps, we find that a GT3076R seems to be ideal for you:
http://www.atpturbo.com/root/maps/gt30r.htm
Originally Posted by Warrtalon
33-34psi on pump gas/no meth on a GT35r and putting down 600whp? Come on, we know better...
Originally Posted by Ted B
Then consider a turbo that reaches its practical choke limit around 7500rpm and 25psi for a 2.3L engine and call it a day. That will give you the best compromise between the largest usable powerband and best usable power.
For a 2.3L engine running at 90% VE at 7500rpm, you would be looking at something that will top out around 50lb/min airflow running upward of 25psi. If we look at compressor maps, we find that a GT3076R seems to be ideal for you:
http://www.atpturbo.com/root/maps/gt30r.htm
For a 2.3L engine running at 90% VE at 7500rpm, you would be looking at something that will top out around 50lb/min airflow running upward of 25psi. If we look at compressor maps, we find that a GT3076R seems to be ideal for you:
http://www.atpturbo.com/root/maps/gt30r.htm
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Originally Posted by Ted B
Then consider a turbo that reaches its practical choke limit around 7500rpm and 25psi for a 2.3L engine and call it a day. That will give you the best compromise between the largest usable powerband and best usable power.
For a 2.3L engine running at 90% VE at 7500rpm, you would be looking at something that will top out around 50lb/min airflow running upward of 25psi. If we look at compressor maps, we find that a GT3076R seems to be ideal for you:
http://www.atpturbo.com/root/maps/gt30r.htm
For a 2.3L engine running at 90% VE at 7500rpm, you would be looking at something that will top out around 50lb/min airflow running upward of 25psi. If we look at compressor maps, we find that a GT3076R seems to be ideal for you:
http://www.atpturbo.com/root/maps/gt30r.htm
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Originally Posted by Warrtalon
33-34psi on pump gas/no meth on a GT35r and putting down 600whp? Come on, we know better...
Straight pump gas? cannot beat a 50Trim turbo. Turbo Trixx just tuned a car with their 50Trim kit that made 450WHP on their dynojet, about 100 more then the stock could do.
Originally Posted by nrcooled
I will be keeping my stroker below 7500RPM so a topend monster won't do me any good. I think the 50 trim will be a good trade-off for me. I was looking at the new 20G-9-5 but I think I will let a few folks be the guinea pigs first before I take the dive.
The biggest limiter that I see running a big turbo on pump is "effective" compression ratio. i.e. the more air pumped by the turbo the higher the cylinder pressure = more prone to knock on pump. I am just really stuck on what I can run on a DD and still get good performance for the track.
Luda - thanks for all the input. What were your exact impressions of the 3071? This was one of the turbos that I was looking at along with the 3065 and 50 trim.
The biggest limiter that I see running a big turbo on pump is "effective" compression ratio. i.e. the more air pumped by the turbo the higher the cylinder pressure = more prone to knock on pump. I am just really stuck on what I can run on a DD and still get good performance for the track.
Luda - thanks for all the input. What were your exact impressions of the 3071? This was one of the turbos that I was looking at along with the 3065 and 50 trim.
I don't expect that putting a 3076 or 50 trim will net me a whole lot of power, but it should net me the additional 15-20 wtq that I'm looking for past 7500 rpm.
l8r)
