Now i've been searching and reading on turbo's and kits and finally narrowed it down to an agp turbo kit but stuck on picking either the 3147 or gt3071r. I've been a honda owner previously and this is my first turbo car and honestly can't stand the stock turbo how it just dies from 4500-6000 but love the spool. This is my only car so i want awesome spool up characteristics but still able to make decent times at the drag strip. I'm also in colorado which the elevation creates more lag and lower power. Now i know the gt3071r is a 44 lb/min turbo but the 3147 i've read is a 47 lb/min correct? What would be the spool difference between these two turbo's. i see on your website that you say 2800-2900 on the gt3071r and 3000-3100 on the 3147 but could you really feel a difference between the two like between shifts? Do they both stay spooled if i speed shift without going open throttle shifts or do they fall out? Sorry if this is so long just i can't make up my mind.Agp please help me because right now i'm not seeing why spend 800 dollars more on the gt3071r if the 3147 can make a little more power but sacrifice 200 rpm's of spool. Lastly what are your thoughts on just oil cooled turbo's like the 3147 on life of the turbo compared to oil and water cooled. Thanks for any help Tommy
Reliability is the same between oil and oil and water. Both spool very fast and won't fall out of boost between shifts as long as you can shift decently. I think the 3147 or 50 trim are the two best turbos for the srt4. If you are going for straight line speed or drag racing, then look into a 50 trim or DBB50.
I'm looking more into a street/strip turbo but honestly i would make it to the drag strip maybe 2-5 times a year so it's basically going to be my daily driver turbo and to me i want a car that can spool great but still make decent amount of power. why i really went away from stage 3 because you have to put a piggy back on it which defeats the purpose of stage 3 because of the plug and play and i don't plan on running 100 octane everywhere i go to run in hom. Thanks Nick though i'll probably be picking up the 3147 off of you guys pretty soon. Tommy
Tom, you're definately in the right ballpark with the 3147 & 3071R as we need that extra spool at our altitude. I think you'll be happy with either choice as price is the bigger factor the difference in performance will be.
I'd recommend (along with others here in colorado who've owned a 50 trim) to stay away from the 50 unless you're a "Track Rat" (which you've stated you're not). Daily driving isn't bad with the 50 at all but you're really like having more power down low.
The 50 trim excells at the back half of the track
The 3147/ 3071R excell in the front half of the track.
How may races or spirited street driving lasts a whole 1/4 mile? Almost none?
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to tell you the truth i would go with the 3071r because it will have more low end tq like stock turbo and stag3. i have the 3147 but wouldn't mind the 3071r.
it's really hard to decide because agp is the ones that know the specs of the 3147 and i don't think they want to share the inducer exducer sizes. reed have you ever been in a 3071r car? i noticed it's pretty easy to get 350 to the wheels on both setups but i've seen some good numbers on the 3147 over the 3071r. The graphs to both turbo's look identical but the 3147 seems to spool just a tad later and make a lil more top end not much though. i love how the graph is very linear almost like a roots supercharger and keeps going up not dropping off not like the 50 where at 3500-3700 a sudden boost in power. Honestly i don't know why people don't start out with these turbos first rather then 50 trim or 3076. Our powerband really likes these turbo's with our 6250 limiter.
it's really hard to decide because agp is the ones that know the specs of the 3147 and i don't think they want to share the inducer exducer sizes. reed have you ever been in a 3071r car? i noticed it's pretty easy to get 350 to the wheels on both setups but i've seen some good numbers on the 3147 over the 3071r. The graphs to both turbo's look identical but the 3147 seems to spool just a tad later and make a lil more top end not much though. i love how the graph is very linear almost like a roots supercharger and keeps going up not dropping off not like the 50 where at 3500-3700 a sudden boost in power. Honestly i don't know why people don't start out with these turbos first rather then 50 trim or 3076. Our powerband really likes these turbo's with our 6250 limiter.
I'm still grinning ear to ear after just making eleven passes at the track on Saturday with my 3147. I have a PT Cruiser and weigh at least 400 lbs. more than an SRT4 but that "little" turbo pulls like a freaking freight train in 3rd and 4th gear. Don't underestimate the 3147.
Added side note: Two other things that are a disadvantage to a PT Cruiser compared to a SRT4.
1. We are aerodynamicaly challenged compared to an SRT4
2. We have a final gearing ratio of 3:29 compared to 3:54 on the SRT4
Deen
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Last edited by katsrusdragracing : 10-06-2006 at 05:43 AM.
I'm still grinning ear to ear after just making eleven passes at the track on Saturday with my 3147. I have a PT Cruiser and weigh at least 400 lbs. more than an SRT4 but that "little" turbo pulls like a freaking freight train in 3rd and 4th gear. Don't underestimate the 3147.
Deen
X100 on the 3rd and 4th gear!
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It has the same compressor as the GT3071R but a smaller turbine for quicker spool.
Right now I have a GT3071R & love it, but if I were to do it again, I would get the 2871.
The 3071 hits like a horse anywhere between 3000-6000RPM.
My car is a daily driver & I'm usually in the 2000-3000RPM range so a turbo with a little quicker spool would be ideal. (Yes I could down shift but I'm lazy)
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i've kept up with vector's write up but he never said any results except his impressions. I'm trying to hit 375-400 on pump with awesome spool but also say 430-440 on race gas. When i cruise i'm usually around 2500-2800 hate going any lower because of the hills around me. The 2871r has a tiny tiny turbine t25 flange and i would have to get a custom manifold/kit. Other thing that bug me is on the 2871r and 3071r the 4" inlet and having to use a reducer to a 3". Right now the 3147 looks good and a cheaper price
i've kept up with vector's write up but he never said any results except his impressions. I'm trying to hit 375-400 on pump with awesome spool but also say 430-440 on race gas. When i cruise i'm usually around 2500-2800 hate going any lower because of the hills around me. The 2871r has a tiny tiny turbine t25 flange and i would have to get a custom manifold/kit. Other thing that bug me is on the 2871r and 3071r the 4" inlet and having to use a reducer to a 3". Right now the 3147 looks good and a cheaper price
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3147 & gt3071r difference
Tommy
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