Hmmm... that the PBOX trap speed had to be over 130 for a 60-130 to occur during the quarter?

 

My buddy Izzy stopped by and took a nice HD video of one fo teh dyno runs.

http://www.youtube.com/watch?v=G_qi-lWNOiM

 

Currently an Engineering grad student at Oregon State. Mostly familiar with GT turbos working with a few of my buddies on project cars like a 94 Honda Civic with BB GT4088R@38psi, 0.58AR/88mm wheel, T4, .85AR, and dual Garret TB22, 15 psi, T3, etc....mostly Garrett turbos. Not familiar alphas and since there is so little info on your website, hence all the q's.

What's so funny? I saw this post which is why I looked it up and was surprised to find that it was with A3071 which is why I asked the question. If your car is purposely detuned so be it. That fact remains is that your car with more mods and bigger compressor wheel is making 100 less whp than a comparable car with even lesser mods. And you can't blame the dyno on this one. That car is also stock motor, not race car. . Plus despite what you say, there is not going be a 100 whp difference use race gas + meth vs 93 + meth. Your answers contradict each other.

 

what's funny is your lack of knowledge of topic at hand and inability to comprehend the facts/information presented to you.

Kieran made 7xx on 109+Meth and more boost, timing, overall agressive tuning.
I made 6xx on 93+Meth.

From the information I gathered from several reliable source in the industry I chose to stay at the power level I am at. Replacing the Metzger GT1 motor is just a bit costlier then replacing a civic motor .... but you knew that already being a grad student and all.

 

Then I would say someone with A3071s would hand your butt to you on a platter. Why? Because if you want to limit yourself to 624 whp with A3076, then A3071 will be more efficient since you get a better spool advantage with no difference up top at that level. But what do I know, I'm just a grad student.

 

This seems like a great question

 

i second that. since ive been wondering that myself. i think a max setup A28 would suffice... maybe

 

simple. A28s flow less air at same boost as A30s. so in order to match A30 numbers the A28s would have to be running more boost. stock motor can only take a certain amount of boost. i amde the mistake of getting a GT2871R on my 2.0T GTI because everyone was saying that its the best fitted upgrade for a 2.0 4cyl and then I ran my buddy who was smarter and di the GT3071R. Me on 1.55bar and him and him 1.3bar ..... he walked me.

A28s also make more low end torque and earlier -> easier way to break stock rods.

A28s do not sustain power at higher rpms like the A30s.

A28s are awesome for road racing where early spool is important. new A28 spool extremely quick.

i wanted a strong top end car that made a lot of power on stock internals and Tony told me to get 3076s. and top end 3076>3071>2871, 76s spool like 150rpm later then 71s but the top end gains are way more substatial.

hope this helps

 

Agree 100%. I'm fully aware of how a GT30 compares to a GT28 when run to the limit of their efficiency zone. But we are talking about a neutered 3076 (top end limited) vs GT28 maxed. The GT28's win at the low end. How much do the limited GT30's out-perform by at the top end? [edit] when set up like on your car.

 

Not much. Take a look at the maps for GT2876 vs GT3076 at 40# which is about what he's likely pushing. Both within a couple of %. The 2876 would have a greater fun factor and not lose much up top at that level.

 

Hi,, By any chance,,,,Would you know how the flow of the K24/20s would compare to these?? Thanks

 

40lbs of boost? ....and as far as a Alpha 28 making as much power as an Alpha 3071/3076....please...you need to do a LOT more research here on what people have done with these cars and different turbos....


Here is a 20g map...

 

HI,Thank you for that info/ map....But for some reason I can not open it....Could you PLEASE tell me in your opinion how it compares for flow....I know the ball bearing turbos will spool alot quicker then those laggy K24/20's....Have a great day......

 

think he's talking about 40 lbs/min of airflow from each turbo

 

can you just go back to your thread and stop trolling mine.

- you do not have a 996
- you never had a 996
- you know nothing about a 996 to contribute
- you show no signs of understanding any 996tt setups
- stop trolling. no one cares that you go to college and build turbo civics. been there done that.