The reason i'm on this forum is to look for turbo advice...as you DSM folk deal with Mitsu turbo's alot as well as Garrett this would be a good place to ask i think....

So i have a 2001 2.0L 8v Jetta...my friend GAVE me his stock turbo off his '02 wrx (TD04L-13T) Now i'm looking to upgrade...since i did all the work to fit the turbo...i was thinking of keeping to subie upgrades(FP's TD06SL2-18g) but its not hard to jus get a different manifold and turbo all togther(T3/T4 50 trim).

All in all i'm looking for 350whp at around 24-25psi ON PUMP. Looking at the Compressor maps for the the two turbos they flow very much the same but what confuses me is that after calling FP direct and talking to a tech about it, he was saying that i can spin the turbo up to 28psi and that definately doesnt show when looking at its map. Where as the 50trim when looking at its map can spin upwards of 32-34psi. Anyway PSI is an irrelevent number at times...of course its all about volume of flow so when plotting on these compressor maps the differences in efficiencies is only 2 or 3 percent at various p/r and rpm with very comprable flow.

Ok i think i'm rambling....which turbo would you all go with? How close do you all think they are

50 Trim





FP18g

Well both turbos can get you to your 350whp. But you have to understand that you would have to also do fuel upgrades. The 50-trim sounds more promising. I would recommend the 50-trim.

awesome_asim187 said:

Well both turbos can get you to your 350whp. But you have to understand that you would have to also do fuel upgrades. The 50-trim sounds more promising. I would recommend the 50-trim.

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of course the fuel upgrades...i already built the motor to hold it...right now i have about enough fuel for 300whp and will be switching to at least 550cc (or possibly 630) injectors when i get the turbo. My main concern is gettin there "comfortably" for the turbo...so in other words not spinning the turbo to its peak.

^^up

Bumping threads here is not recommended.

As far as the turbos go. I say go with the 50 trim that way you can have room to grow if you really want to break drive line parts and engine internals.

Beautiful ride. Makes me want to turbo my VW Jetta I use as a winter car! One word of advice from someone who also turboed a non turbo car; keep very close eye on the tuning and start off with lower boost. Dont forget all the accompaning mods as well.

As an aside what is the compression ratios in those cars?

SOADweskey said:

Bumping threads here is not recommended.

As far as the turbos go. I say go with the 50 trim that way you can have room to grow if you really want to break drive line parts and engine internals.

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sorry borrrrriing slow day at work...and whats wrong with breaking stuff

Echo5Zulu said:

Beautiful ride. Makes me want to turbo my VW Jetta I use as a winter car! One word of advice from someone who also turboed a non turbo car; keep very close eye on the tuning and start off with lower boost. Dont forget all the accompaning mods as well.

As an aside what is the compression ratios in those cars?

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well stock c/r is 10:1 the 1.8t stock c/r is 9.3:1 and my compression with the pistons i bought is 8.5:1 as far as accompaning mods...head work, cams, LSD, stronger clutch...all on the way

q_dubz said:

All in all i'm looking for 350whp at around 24-25psi ON PUMP. Looking at the Compressor maps for the the two turbos they flow very much the same but what confuses me is that after calling FP direct and talking to a tech about it, he was saying that i can spin the turbo up to 28psi and that definately doesnt show when looking at its map. Where as the 50trim when looking at its map can spin upwards of 32-34psi. Anyway PSI is an irrelevent number at times...of course its all about volume of flow so when plotting on these compressor maps the differences in efficiencies is only 2 or 3 percent at various p/r and rpm with very comprable flow.

Click to expand...

This is because the wheels are sometimes, I'm trying to find the right word, underestimated? The 50-trim is only rated at like 49 lbs/min or something, yet many people have gotten 500whp on one.

What is your powerband like? You have the 2.0? What's your redline with the built head?

brute said:

This is because the wheels are sometimes, I'm trying to find the right word, underestimated? The 50-trim is only rated at like 49 lbs/min or something, yet many people have gotten 500whp on one.

What is your powerband like? You have the 2.0? What's your redline with the built head?

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with built head...7500...peak power being roughly in the high 6k range to almost 7k

q_dubz said:

well stock c/r is 10:1 the 1.8t stock c/r is 9.3:1 and my compression with the pistons i bought is 8.5:1 as far as accompaning mods...head work, cams, LSD, stronger clutch...all on the way

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Wow 10:1 is getting up there. I thought my NT block with 9:1 was high. Probably good idea that you went with the 8:1 rods. Similar to the 2gen ratio in the DSM world. It can be done with high compression but tuning is key.

Echo5Zulu said:

Wow 10:1 is getting up there. I thought my NT block with 9:1 was high. Probably good idea that you went with the 8:1 rods. Similar to the 2gen ratio in the DSM world. It can be done with high compression but tuning is key.

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this 2.0L motor is N/A stock with 10:1 compression (perfectly normal)

q_dubz said:

with built head...7500...peak power being roughly in the high 6k range to almost 7k

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In that case, I'd go with the 50-trim. It is, for one thing, cheaper and can support more hp for the future. This 6SL 18g is pretty new to us, but if you search the site there's a few threads about it. The 50-trim on the other hand is extremely well-documented and everything (click on the top button called Members, and go to the dyno sheets. Also, the 18g will start to drop off around 6500rpm, so it may not be the turbo for you since you have so many rpm to work with.

brute said:

In that case, I'd go with the 50-trim. It is, for one thing, cheaper and can support more hp for the future. This 6SL 18g is pretty new to us, but if you search the site there's a few threads about it. The 50-trim on the other hand is extremely well-documented and everything (click on the top button called Members, and go to the dyno sheets. Also, the 18g will start to drop off around 6500rpm, so it may not be the turbo for you since you have so many rpm to work with.

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well you forget im working with an 8v head...so i dont think boost drop off would be too bad...i dunno i'm stuck on this "being unique" thing...and it'll cost me a lil more if i go 50 trim becuz i'll have to make a new down pipe and possible go exteral wg and such...honestly as long as i can get 325-350whp reliably i'll stick with the FP

q_dubz said:

honestly as long as i can get 325-350whp reliably i'll stick with the FP

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You can get the Evo 16g to do that. I mean, anything you get to make the 18g work (oil/coolant lines and the exhaust situation), the 16g will work too. May want that unless you're looking for more in the future.

brute said:

You can get the Evo 16g to do that. I mean, anything you get to make the 18g work (oil/coolant lines and the exhaust situation), the 16g will work too. May want that unless you're looking for more in the future.

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Right i want to have that with room to expand a lil bit!

You want to turbo the nonturbo 8v?

It wont hold 350whp, those transmissions are the biggest POS

sbiggi said:

You want to turbo the nonturbo 8v?

It wont hold 350whp, those transmissions are the biggest POS

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you're thinking of the older mk3 trans (o2a) yea...they suck...mine it doesnt...axles might have a probelm though

q_dubz said:

you're thinking of the older mk3 trans (o2a) yea...they suck...mine it doesnt...axles might have a probelm though

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o2o and o2a ya. I never turbo'd mine after I read about everyone stripping the gears at 250 wtq.

sbiggi said:

o2o and o2a ya. I never turbo'd mine after I read about everyone stripping the gears at 250 wtq.

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yea the mk4 have o2j and the 6spds are o2m

Closed for bumping.