Turbo Selection
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Evolving Member
Joined: Feb 2005
Posts: 164
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From: Claremont NC
yea but if ima go in debt ima do it big lol... brian I know there is a huge evo population in hickory and i know ur evo is sick on the stock turbo (well sort of stock ;-))... this is justin in case u didn't know... I just came into a decent bit of cash and i wanna get a new turbo kit and all the other goodies that make evos so wonderful... also I never heard of aem messing up emissions testing. I read one forum on here about sum dude in colorado who bought that rnr gt30r kit and that thing looks so sexy... sounds like a very well made kit... I did a lil bit more research and it does sound like the t67 greddy would be better suited to a stroker motor or atleast a 2.0 with a built block and sum 280 cams! So which do u guys think AMS or RNR and gt35 or gt30??? also if ne1 has ne experience with the apexi power FC ems please let me know!!!
I realized it was you Justin, last night when I was reading your posts. The AEM is not OBD2 compliant. In other words it doesnt even support the OBD2 diagnostic port that NC emissions stations plug in to to do the NC annual state inspection. You will have to pull it out and reinstall the factory ECU just to pass emissions. This can be a big problem if you have upgraded injectors, you have to take those out too.
Chris (aka Smilely) on the forums. He has the other white Evo here in town, he sold his AEM and went with the Dynoflash, partly for this reason and also because his car ran just as strong with the Dynoflash.
I highly advise against an AEM for a daily driver, unless you like to tune cars more than you like to drive. OR you have alot of money and a superior AEM tuner that is a next door neighbor. Nobody in NC can tune them well that I know of.
My $.02.
If you want something responsive like you said in your first post then go for something smaller or a medium size ball bearing unit.
Still hard to beat the stock turbo unless you want and all out drag car, top end monster.
If you get a upgraded larger turbo, just dont expect to have as much fun in the mountains as you did with the stock turbo.
Brian
Chris (aka Smilely) on the forums. He has the other white Evo here in town, he sold his AEM and went with the Dynoflash, partly for this reason and also because his car ran just as strong with the Dynoflash.
I highly advise against an AEM for a daily driver, unless you like to tune cars more than you like to drive. OR you have alot of money and a superior AEM tuner that is a next door neighbor. Nobody in NC can tune them well that I know of.
My $.02.
If you want something responsive like you said in your first post then go for something smaller or a medium size ball bearing unit.
Still hard to beat the stock turbo unless you want and all out drag car, top end monster.
If you get a upgraded larger turbo, just dont expect to have as much fun in the mountains as you did with the stock turbo.
Brian
As far as turbo selection goes, it really depends on what you want.
If you don't care about the daily driver performance (eg you don't mind full boost not hitting until ~4400rpm), then by all means go for a GT35R based kit. It will be faster and laggier than the stock turbo on pump gas, and it will haul *** on race gas.
However, if you aren't planning on eventually going with a stroker kit or built 2.0l block and if you aren't planning on running race gas, then I would definitely recommend a kit based on the 3071R. On 93 Octane a 3071 will only make ~15-20whp less than a GT35R, but it will spool much sooner (only slightly later than stock). If you can wait a couple of weeks, I will have some numbers for you, since my car should be done by then (AMS 3071 kit on a built 2.0l block).
I ended up going with the 3071 because I am not going to run race gas anywhere other than on a track (road racing, NOT drag racing), and even when I'm on the track, with racegas, I will not really be boosting beyond 23psi (ok, maybe 25 eventually). Also, the only reason I chose to build up my block (pistons, rods, springs, etc.) is not so much out of necessity, but to give me more flexibility and some insurance during road racing sessions.
l8r)
If you don't care about the daily driver performance (eg you don't mind full boost not hitting until ~4400rpm), then by all means go for a GT35R based kit. It will be faster and laggier than the stock turbo on pump gas, and it will haul *** on race gas.
However, if you aren't planning on eventually going with a stroker kit or built 2.0l block and if you aren't planning on running race gas, then I would definitely recommend a kit based on the 3071R. On 93 Octane a 3071 will only make ~15-20whp less than a GT35R, but it will spool much sooner (only slightly later than stock). If you can wait a couple of weeks, I will have some numbers for you, since my car should be done by then (AMS 3071 kit on a built 2.0l block).
I ended up going with the 3071 because I am not going to run race gas anywhere other than on a track (road racing, NOT drag racing), and even when I'm on the track, with racegas, I will not really be boosting beyond 23psi (ok, maybe 25 eventually). Also, the only reason I chose to build up my block (pistons, rods, springs, etc.) is not so much out of necessity, but to give me more flexibility and some insurance during road racing sessions.
l8r)
May I suggest that before you buy ANY turbo kit, ask for the compressor map on the turbo you are considering. You will be amazed to find out that some vendors "enhance" the HP claims of their turbos. Maps don't lie!
Originally Posted by Ludikraut
As far as turbo selection goes, it really depends on what you want.
If you don't care about the daily driver performance (eg you don't mind full boost not hitting until ~4400rpm), then by all means go for a GT35R based kit. It will be faster and laggier than the stock turbo on pump gas, and it will haul *** on race gas.
However, if you aren't planning on eventually going with a stroker kit or built 2.0l block and if you aren't planning on running race gas, then I would definitely recommend a kit based on the 3071R. On 93 Octane a 3071 will only make ~15-20whp less than a GT35R, but it will spool much sooner (only slightly later than stock). If you can wait a couple of weeks, I will have some numbers for you, since my car should be done by then (AMS 3071 kit on a built 2.0l block).
I ended up going with the 3071 because I am not going to run race gas anywhere other than on a track (road racing, NOT drag racing), and even when I'm on the track, with racegas, I will not really be boosting beyond 23psi (ok, maybe 25 eventually). Also, the only reason I chose to build up my block (pistons, rods, springs, etc.) is not so much out of necessity, but to give me more flexibility and some insurance during road racing sessions.
l8r)
If you don't care about the daily driver performance (eg you don't mind full boost not hitting until ~4400rpm), then by all means go for a GT35R based kit. It will be faster and laggier than the stock turbo on pump gas, and it will haul *** on race gas.
However, if you aren't planning on eventually going with a stroker kit or built 2.0l block and if you aren't planning on running race gas, then I would definitely recommend a kit based on the 3071R. On 93 Octane a 3071 will only make ~15-20whp less than a GT35R, but it will spool much sooner (only slightly later than stock). If you can wait a couple of weeks, I will have some numbers for you, since my car should be done by then (AMS 3071 kit on a built 2.0l block).
I ended up going with the 3071 because I am not going to run race gas anywhere other than on a track (road racing, NOT drag racing), and even when I'm on the track, with racegas, I will not really be boosting beyond 23psi (ok, maybe 25 eventually). Also, the only reason I chose to build up my block (pistons, rods, springs, etc.) is not so much out of necessity, but to give me more flexibility and some insurance during road racing sessions.
l8r)
i am very curious to see pump gas dyno #'s and 1/4 mile times from the 3071.
Is'nt David Buschur running the stock turbo on his RS in the Car & Driver 4banger shootout. Wait 'til you see the numbers that he posts. This may change your mind as to the capabilities of the stock turbo.
Originally Posted by Whoosh
May I suggest that before you buy ANY turbo kit, ask for the compressor map on the turbo you are considering. You will be amazed to find out that some vendors "enhance" the HP claims of their turbos. Maps don't lie!
For example, after looking at the compressor map of the 3071 (as in Garrett's catalog) and calculating the airflow for the 4g63, I realized that past 8500rpms, I will most likely be flowing more air than the 3071 can efficiently handle. However, comparing that to the gt30 and gt35 compressor maps, I feel that for my application the earlier spool of the 3071 will offset the topend I would gain with a bigger turbo.
Originally Posted by Rez90
i am very curious to see pump gas dyno #'s and 1/4 mile times from the 3071.
but I will post dyno numbers as soon as I have them.l8r)
Last edited by Ludikraut; May 27, 2005 at 07:54 AM.
Which is exactly why I say get the map. If they are unwilling to provide one, ask for reasonable proof or go to another manufacturer/vendor.
What I am trying to convey is precisely what you learned from studying the compressor maps. People can say that their turbo kit makes xxxHP, but it don't mean sh-t if that number is way outside of the turbos efficiency range.
What I am trying to convey is precisely what you learned from studying the compressor maps. People can say that their turbo kit makes xxxHP, but it don't mean sh-t if that number is way outside of the turbos efficiency range.
Originally Posted by Ludikraut
IMO that's a yes and no ... definitely familiarize yourself with the compressor maps of various turbos and learn how to read them. However, in my experience, all of the shops use the turbo manufacturer compressor map and either are unwilling or unable to publish a compressor map for a turbo that they have customized.
For example, after looking at the compressor map of the 3071 (as in Garrett's catalog) and calculating the airflow for the 4g63, I realized that past 8500rpms, I will most likely be flowing more air than the 3071 can efficiently handle. However, comparing that to the gt30 and gt35 compressor maps, I feel that for my application the earlier spool of the 3071 will offset the topend I would gain with a bigger turbo.
For example, after looking at the compressor map of the 3071 (as in Garrett's catalog) and calculating the airflow for the 4g63, I realized that past 8500rpms, I will most likely be flowing more air than the 3071 can efficiently handle. However, comparing that to the gt30 and gt35 compressor maps, I feel that for my application the earlier spool of the 3071 will offset the topend I would gain with a bigger turbo.
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Whoosh and I both run the Power FC. I am very happy with it, but I would make sure you have someone nearby that can tune it.
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Evolving Member
Joined: Feb 2005
Posts: 164
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From: Claremont NC
sum guy right down from my house just opened up a tuning shop with a dyno and all kinds of goodies... he has an early model rx7 turbo and a srt-4 now ... he is very familiar with aem and the utec but im not too sure about the power fc... hes just dying to get his hands on my evo lol. Its awesome to have sum1 like that just 2 miles from my house. also thanks for all the input, and again if NE 1 out there has the t67 greddy installed... let me know how u like it... for sum reason i cant get that kit out of my head... I love greddy products.
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From: Ann Arbor
Originally Posted by robertrinaustin
Whoosh and I both run the Power FC. I am very happy with it, but I would make sure you have someone nearby that can tune it.
how's the 3071 compared to teh 3076. i will be running 91 octane and mostly daily driver. but i do road course racing about every 2 months. i want more power about 400whp but keeping spool close to stock. i wanted the 35r but i heard it's not that great for the track.