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Old 11-30-2003, 12:00 PM   #1
pedrok82
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Default whats the best turbo for the drag strip?

I am looking into buying a turbo for my 02 wrx and was wondering what was the best turbo for drag racing?

thanks.
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Old 11-30-2003, 12:26 PM   #2
A_Train
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There isn't one "best" turbo. It depends on what other mods you have and possibly even your driving style. What other mods are you looking to do?
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Old 11-30-2003, 12:42 PM   #3
ErikAnderson
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what is your price range, supporting mods?
The VF22 is a great IHI turbo for that sort of thing. But by no means the best.
You should be more indepth with some more information.

If you are thinking about buying a new turbo. You should also be thinking about new injectors, fuel pump, engine mgmt, alternate boost controll. If you want safe, reliable power.
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Old 11-30-2003, 02:05 PM   #4
pedrok82
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sorry for the insufficient information
i have the s-afc and avc-r on it now.
Sky is the limit on any other parts, but i am looking for the best bang for my bucks. im looking for something quick and able to hold me around 300-350 hp.

i understand that there are other things i must do before i put the turbo in order to make it work properly.
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Old 11-30-2003, 02:08 PM   #5
ErikAnderson
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VF22, you can get them new for less than 700bucks. IIRC its the hardest hitting of the VF line with the largest capability for hp (from what i remember)

SOME people say it has terrible spoolup time, while others will post rightafter them saying that it is not bad at all.

I dont have one in my car, so i cant say.
But it is one very large turbo for a subie, and will hit very hard. make sure you have supporting mods.

Did you have any problems getting your safc tuned right? i have heard of people going out of their minds with that thing.

I love my avc-r though.. makes me wonder how i ever lived without it. All the different points and boost curves you can build with it.... tasty
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Old 11-30-2003, 07:44 PM   #6
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VF22 is a good bang for the buck turbo if you have supporting fuel, engine management, and exhaust mods in place.

XXtuning is getting rid of them for 620 bucks shipped. That's hard to beat.

Regarding lag, some people define lag as at what rpm the turbo reaches full boost. Disregarding the obvious misnomer, I'll offer the following:

With the VF22 and an FMIC I hit 1 bar at 3200rpm, 18psi by maybe 3600, 24 psi by 4600. The stock tdo4 on my car might see 1 bar by 2800-2900, and 16.5 psi by 3400, and 24 psi never ever.

What I call lag is the time the turbo takes to spool back up to full boost whilst in the "full boost rpm range." Stock, my car would take maybe a second to go from vacuum to full boost ar 4000 rpm when stomping in the gas.

Now, with a VF22 and an FMIC, it takes maybe a second to reach full boost (from vacuum) when stomping on the gas at 4000 rpm.

There is no typo. I really cannot tell the difference in what I define as "lag." I drive around at 17.5 psi, BTW. Were I comparing the times it took the td04 to go from vac to 16 psi and a VF22 to go from vac to 24 psi it would obviously be an unfair comparison.

Now to answer your title question, some say the FP green is the best drag turbo, some say the T3/T4, some say the PE1820, some the SR50 and lets not forget the 20G. All of them can deliver parts-shattering power (as can the VF22).

The answer is more subtle than the question. If you don't want to buy new shortblocks and trannies all the time, maybe a vf30 or SR30 or similar turbo (or even VF22) running 16, 17 or 18 psi would be good for you: the car can go fast, and if you really try you can blow transmissions with the big boys. If you don't mind spending $ on stronger driveline parts and motor internals, but wanty a reasonably broad powerband so you can motor around town efficiently, maybe a T3/T4 or a SR40. For all out dragstrip performance you could get an SR50, FP green, 20G, but expect a lot of sudden power, and a tad narrower power band. Some of the latter are not bolt on turbo's and require custom exhaust pipes (along with the aforementioned driveline improvements if you want the car to stay together for more than a few passes).

I guess I left out the PE 1820. I think it would fit in somewhere between the last two categories.

I imagine my post will incite a furious riot of other (far superior) opinions, but that might be good for you as you'll have a greater body of thoughts to draw from.

Good luck dude. save for those trannies!
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Old 11-30-2003, 09:08 PM   #7
pedrok82
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thanks for the information, especially to TexRex it helped out a lot.
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Old 11-30-2003, 09:21 PM   #8
ErikAnderson
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yeah, what Texrex said.

i think the most important thing he talked about there was "parts shattering power"

if you are not ready to start pulling expensive broken parts out of your car, dont set your self up for failure.

You can still go pretty damn fast and get some pretty good numbers while keeping your tranny and dreaded #3 cyl happy while you save up for tougher components.
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