vf52 and vf39 specs - Subaru WRX Forum
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#1 Old 05-15-2010, 05:15 PM
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vf52 and vf39 specs

I am trying to set the record for fastest vf52 and i thought nobody had dipped into the 11s with stock turbo but i was wrong. Someone has with a vf39 but not a vf52 yet. A guy went 11.78 w vf39 so i starting researching this turbo and found out it flows 38 lbs/min does anyone know what a vf52 flows? I cant find comparison because the turbos come on diff models and years. Can anyone point me in the right direction? I was told the vf52 is slightly smaller maybe 35lbs min?

11.82 at 116mph
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#2 Old 05-15-2010, 07:51 PM
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if i recall, in boostaddicts million pages he said the 52 was 38 also. im not sure, start looking, its gonna take awhile.

Scott-2011 WRX 335HP 394TQ 93 VF52!
http://www.wrxtuners.com/forums/f121/2011-wrx-build-31226/
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#3 Old 05-15-2010, 08:49 PM
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Screw that i already spent like an hour googling vf52 cfm/lbs/min etc I got nothing

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#4 Old 05-15-2010, 11:17 PM
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Maybe look up the VF48.. Basically teh same turbo.

-Chris
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#5 Old 05-16-2010, 11:41 AM
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My speculation is the VF52 has roughly the same flowrate as the VF39 with a very similar intake side but with a smaller hotside. Spools slightly faster but has slightly less peak capability.

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#6 Old 05-16-2010, 12:05 PM
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i hope thats ture for the VF43 also^^^^

im kinda sad. at my dyno a 07 wrx with a VF43 put down 14 more HP and 12 more TQ AND is running less parts than me.

he said he only has 3" exhaust, not sure if its TBE catted or catless, sti top mount, and Cobb intake at only 18.5PSI.

im running 19.5psi, CBE, light weight pulley, UP, catless DP, CAI, 3-port EBCS, 255lph pump, 1 step colder plugs, FMIC, BOV, Custom blow-through, oil catch can

now i no the pump, 3-port, plugs, BOV, and catch can dont add power per say, but thats a pretty damn strong car for such little mods, by the same tuner, same dyno and a different turbo. he also makes his TQ 500 RPM sooner that turbos gotta have something a little special.

Scott-2011 WRX 335HP 394TQ 93 VF52!
http://www.wrxtuners.com/forums/f121/2011-wrx-build-31226/
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#7 Old 05-16-2010, 12:58 PM
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You focus too much on numbers man

-Chris
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#8 Old 05-16-2010, 01:12 PM
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your point? sucks being a genius in math and chemistry but it is what it is. numbers are a good thing. numbers in this case are saying a VF43 and possible VF39 are better than a VF52! isnt that prudent information that maybe someone somewhere would like to know? this is after all a site to share and receive information! numbers can give accurate definitive proof of that information. did i post what my HP or TQ was? no! why? because i dont need someone asking "well my dyno did this" or "that dyno did that". thats why i stated only PSI which is always accurate, and same tuner doing the tunes. its as close to 100% as you can get and now it tells a story of a VF43 and a VF52.

the VF43 is a little OT but what does the OP want in the end? fasted 1/4 time which is what? a number

Scott-2011 WRX 335HP 394TQ 93 VF52!
http://www.wrxtuners.com/forums/f121/2011-wrx-build-31226/
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#9 Old 05-16-2010, 02:04 PM
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Well sweetie if it makes you feel better the 43 is almost identical to the 39, just a different wastegate layout to reduce boost creep.

I would say the 52 is very close to the 39/43. From everything I can find on vf39 to vf48 comparisons (remember 48 is pretty much the same turbo as the 52), the hp difference will be within the margin of error on a dyno....

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#10 Old 05-16-2010, 04:25 PM
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Yea screw dyno numbers, cfm, lbs/min. All that crap means nothing. Ive seen guys with 20g turbos running high 12s lol I stand by 60% driver 40% car

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#11 Old 05-16-2010, 04:31 PM
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Quote:
Originally Posted by synolimit View Post
i hope thats ture for the VF43 also^^^^

im kinda sad. at my dyno a 07 wrx with a VF43 put down 14 more HP and 12 more TQ AND is running less parts than me.

he said he only has 3" exhaust, not sure if its TBE catted or catless, sti top mount, and Cobb intake at only 18.5PSI.

im running 19.5psi, CBE, light weight pulley, UP, catless DP, CAI, 3-port EBCS, 255lph pump, 1 step colder plugs, FMIC, BOV, Custom blow-through, oil catch can

now i no the pump, 3-port, plugs, BOV, and catch can dont add power per say, but thats a pretty damn strong car for such little mods, by the same tuner, same dyno and a different turbo. he also makes his TQ 500 RPM sooner that turbos gotta have something a little special.
Dude hes right you care way too much about numbers, maybe you cant help it. 90% of the people on all forums were not impressed with my dyno results but when they saw my 12.33 they changed there minds real quick. Make sure you have no boost leaks at all, good tune, and bring your car to the track and launch it at 5k+ and shift fast you will run good times. If you listen to most of these auto x panzies they will tell you to launch at 3k cause most people are scared to break there cars!Cry! Gotta take a risk to net good results!Laugh!

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#12 Old 05-16-2010, 06:16 PM
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Dude hes right you care way too much about numbers.!
your on more than one forum telling everyone all you care about is having the fastest car ever on a VF52 or stock turbo. your hole life it seems over the past month or 2 again on more than one forum is to have the FASTEST NUMBER. whos caught up in the number game? you did a 12.33 1/4. well ill wait till its 50 degrees out and go faster or go to a track with a lower elevation or a track that runs down hill ect ect. there all different and can give different times. at least im sticking to one dyno, one tuner and the numbers show that there could be a better turbo. only way you could ever have the "fastest time" is same track, same lane, same time, same driver with different VF52 set up to show what you want to show and that isnt gonna happen most likely.

Scott-2011 WRX 335HP 394TQ 93 VF52!
http://www.wrxtuners.com/forums/f121/2011-wrx-build-31226/
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#13 Old 05-16-2010, 10:32 PM
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Im not saying its not cool to be competitive, im just saying dyno numbers mean crap. And yes i wanna be the fastest vf52 and the fastest stock turbo period. I have been sticking to one tuner/dyno wtf are you talking about bro? All im saying is dont cry about your dyno numbers or 13 sec timeslips. Go beat the snot out of your car until u run a good time. And the elevation was 800 ft and about 60degrees if you wanted to know

p.s. after i run 11s with stock trans everyone can stop worrying about 08+

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#14 Old 05-17-2010, 12:09 AM
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^^ im not saying its not cool to be competitive either. my race bike has won dyno shoot outs before. its all some form of "winning", and in my case i was saying to Mosc i hope the VF39 and 43 arnt to much bigger because there top end will come into play and beat me, like on a dyno or at the track. that has nothing to do with a fast VF52, i was just replying and talking.

as for what i was saying about one tuner, one dyno. your comparing 1/4 times when theres thousands of tracks all over the country. its not fair to say you went xxx time at your track when someone else went xxx at theres. time, temp, gas, elevation, humidity, driver ect ect will all come into play and show different numbers. at least im keeping my "numbers" in my competition at the same place, with same dyno and same tuner doing the work. its a closer comparison then 2 cars across the county at different tracks, on different days, in different weather.

my goal is to max out the VF52 and let everyone know its potential. that means every bolt on possible. not talking about total power on a dyno vs another, my set up has made 83 hp and 127 tq over stock. i ran a 13.3 at 100mph bone stock. once i get money on hand to hit the track again (because i know my clutch is gonna slip and i want to be ready to put a new one in) ill see what it can do now with that power increase.

Scott-2011 WRX 335HP 394TQ 93 VF52!
http://www.wrxtuners.com/forums/f121/2011-wrx-build-31226/
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#15 Old 05-17-2010, 04:29 PM
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The vf52 has great potential, most people under estimate it which is a big mistake. You dont have to tell me about bolt ons cause ive done em all. I refuse to do TGV deletes, cams and intake manifold. There is nothing left for me to do to add more power besides running c16 but ill have meth in 24 hours so...
Your clutch will be fine just dont launch past 5k and downshifting at high speeds is really bad. Dont run back to back wait at least 20-30 mins. That is what glazed my clutch. It was fine after it cooled down and i made like 5 hard passes on it. People say the oem clutches are garbage but the 09 ones are def stronger to withstand more hp and tq to previous years. Its only a matter of time before the slip but they are organic which is a good thing. Buy an ACT street clutch, rated at 420ft lbs, feels almost like oem after 200 mile break in period. But its grabby when u want it to be, feels like im gonna snap 2nd when i speed shift it lol

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