pro52 equivalent

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962

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Dec 12, 2012
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I am looking for some suggestions regarding using a Holset pro52 with a 16cm^2 turbine housing, or something similar to that size turbo. Is there a different turbo that is perhaps more modern?

I was looking at Borg Warner turbos, and really like what they have available. The efr9180 comes to mind, but I wonder if all it's features are worth the cost, plus it is a smaller ~68mm (67.7mm) turbo as compared to the pro52.

I would like to stay with a single turbo, if that helps, as I have the rpms to effectively use a single.
 
What is your engine setup and power goal? What rpm range do you plan to make power?
 
The engine setup is a 3.0L, 24 valve, inline 6, Mercedes OM606. I would be happy with 500whp, with 600+ being more of the goal.

The limit for now is ~6600rpms, and with the addition of valve springs 8000+rpms. For the lower range, good power should hopefully start around 3500, and correspond to >200whp.

For reference, the pro52 on the same engine made 700whp, and was reported to be just fine for a daily driver in terms of response/spool up.
 
Stick with a garrett ball bearing variant of the 3788 or 3794. Pte also has some billet ball bearing turbos. Guys are making over 800 whp on 2 liter 4 cylinder mitsu engines with the 6466, and way more than that on the 6766. And are available with vband exhaust housings to promote easy fitment, high flow and fast spool.
 
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The 3788 probably will not flow enough for my whp goal, and the 3794 seems to be a VNT turbo: Garrett GT3794VA Stage 1 Upgrade

I would not mind using a VNT/VGT, but engine compartment space is limited unfortunately, especially for the turbine housing, assuming the turbine housing is the same or similar diameter as the compressor housing. I appreciate the good suggestions though!

For reference, the engine is an IDI design.

The Precision 6766 looks to be similar to the BW efr9180, and about $100 or so less expensive. However, they do offer a 7175 that seems to be quite close to the pro52. Has anyone tried out these turbos?
 
962 said:
The 3788 probably will not flow enough for my whp goal, and the 3794 seems to be a VNT turbo: Garrett GT3794VA Stage 1 Upgrade

I would not mind using a VNT/VGT, but engine compartment space is limited unfortunately, especially for the turbine housing, assuming the turbine housing is the same or similar diameter as the compressor housing. I appreciate the good suggestions though!

For reference, the engine is an IDI design.

The Precision 6766 looks to be similar to the BW efr9180, and about $100 or so less expensive. However, they do offer a 7175 that seems to be quite close to the pro52. Has anyone tried out these turbos?
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Big wheels spool very slow, the 67 mm modern billet wheels outflow old school wheels by a long shot.
Forcedperformance.net is a turbo shop based out of mckinney tx, they sell a non vnt 3794, with a billet hta (gtx) compressor wheel.
 
I would use an S300 based BW charger. A 66mm comp wheel and 73.5mm turbine wheel should do the job beautifully.
 
Ok thanks. It is good to see there are more than a few alternatives out there as compared to the pro52.

I did notice I can get the same forged milled compressor wheel the efr9180 uses, in an s400 based turbo. I wonder if that is worth getting over the efr turbo?
 
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