PTE 6766 vs. FP 3794 - 5 different boost levels - Boostin Performance

[gabytech]

NOTE: All credits to Boostin Performance for the info and post at evolutionm.net. Link: PTE 6766 vs. FP 3794 - 5 different boost levels - Boostin Performance - evolutionm.net

Test vehicle: 96 Eagle Talon TSI "Red Demon"
Boostin Performance Built 2.0L 4G63, 10:1 comp
Boostin Performance Built 6 bolt Head, Kelford 280's, Magnus Cast Intake Manifold, T3 Punishment Exhaust Header
ID 2000's, Dual Bosch 044 Fuel pumps, KB boost-a-pump, E70 race fuel
AMS Evo 8 Race core IC, Full 3" intercooler piping
AEM EMS S1, SparkTech C.O.P.
Turbochargers: Precision BB 6766 & Forced Performance 3794 HTA

Precision BB 6766
PTE "Ported S" compressor cover which has a 4" inlet/2.5" outlet
PTE T3 .82 A/R Turbine housing with a 3" V-band outlet
PTE compressor is 67mm Inducer , 87mm Exducer - Turbine Inducer 74mm, Exducer 66mm

Forced Performance 3794 HTA
Garrett Ported T4S compressor cover which has a 4" inlet/2.5" outlet
Garrett T3 .82 A/R Turbine housing with a 4 bolt 3" outlet
FP compressor is 67.5mm Inducer , 94mm Exducer - Turbine Inducer 72mm, Exducer 65mm


The FP3794 basically has a bigger compressor wheel but a smaller turbine wheel when compared to the Precision 6766. The FP 3794 also has a 7+7 blade compressor wheel compared to the 6+6 blade on the 6766 compressor wheel.

After running both turbos on my car the results were so close that I had to do back to back testing on the dyno to know for sure which turbo had the edge.

Dyno:

I went to the Mustang Dyno with an open mind and both turbos ended up surprising me. Pulls on both turbos were done @ 37, 42, 47, 52, and 55 psi. Timing was untouched for the duration of the testing and fueling was only adjusted to match airflow from each turbocharger. Target AFR was the same for all the testing. Each pull was done once the coolant temp hit 150 degrees - looking back at the logs every pull was done between 150-155 deg. coolant temp. Tire pressure was kept @ 25 psi and was checked numerous times during the test to ensure an accurate comparison between pulls.

After the pulls were done on the PTE 6766, the car cooled for about 1/2 hour while we ate dinner. The FP 3794 was swapped on without the car ever coming off the dyno.

I usually run an AEM BCS tuned with the AEM EMS so I can run boost by gear. For this test I installed a Hallman Pro RX MBC to make boost adjustments quick and easy. I have always used the dyno as a tool to help get my tune close, and then I finish the final adjustments at the track, but not this time. I pushed the car harder than I ever have and ended up burying the MBC on both turbos. With the MBC maxed out, the PTE 6766 saw 55 psi and the FP 3794 maxed out @ 53-54 psi.

Conclusion:

Both T3 turbos are unbelievably potent for their size. Turbocharger technology has sure come a long way in the past 5 years. Both turbos have trapped 170+ mph and gone mid 8's in my 96 Talon.

In my testing, the Precision turbos power band came in sooner but didn't have the top end of the FP. This is seen at every power level, but is very evident on the 42 psi and 47 psi dyno sheets. In the higher boost levels (50's) the Precision turbo seems to make up the ground on the FP. I believe this is because of turbine backpressure, but it's impossible to be sure without a backpressure sensor being logged. Both turbos are great and I'm not sure which one I would consider the winner. Each turbo is better in different ways, so you can use this information to make the call for yourself.

37 psi dyno sheet
5800 - FP 30 psi - PTE 34 psi
6500 - FP 35 psi - PTE 37 psi
7200 - FP 37 psi - PTE 37 psi
8000 - FP 38 psi - PTE 37 psi
8700 - FP 37 psi - PTE 37 psi
9400 - FP 35 psi - PTE 35 psi

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42 psi dyno sheet
5800 - FP 33 psi - PTE 36 psi
6500 - FP 41 psi - PTE 41 psi
7200 - FP 42 psi - PTE 42 psi
8000 - FP 42 psi - PTE 42 psi
8700 - FP 41 psi - PTE 40 psi
9400 - FP 39 psi - PTE 39 psi

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47 psi dyno sheet
5800 - FP 33 psi - PTE 39 psi
6500 - FP 46 psi - PTE 47 psi
7200 - FP 47 psi - PTE 47 psi
8000 - FP 47 psi - PTE 47 psi
8700 - FP 45 psi - PTE 45 psi
9400 - FP 42 psi - PTE 41 psi

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52 psi dyno sheet
5800 - FP 33 psi - PTE 40 psi
6500 - FP 46 psi - PTE 51 psi
7200 - FP 52 psi - PTE 52 psi
8000 - FP 52 psi - PTE 51 psi
8700 - FP 49 psi - PTE 48 psi
9400 - FP 47 psi - PTE 46 psi

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55 psi dyno sheet
5800 - FP 33 psi - PTE 40 psi
6500 - FP 46 psi - PTE 52 psi
7200 - FP 53 psi - PTE 55 psi
8000 - FP 53 psi - PTE 53 psi
8700 - FP 49 psi - PTE 50 psi
9400 - FP 48 psi - PTE 48 psi

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[rr06rs]

This test would be even MORE interesting if you threw the 6466 in the mix since it made MORE power than the 6766 and spooled even faster in testing. I'm sure it would be surpassed once in the upper 40psi range but it would be interesting to see it at 37 and 42psi, where most of us play....

 

[finesse49ers]

Great thread as I was contemplating getting the FP3794 after giving up on my BB6262. But like stated by rr06rs if the 6466 was in the mix it definitely would've been more interesting. Still great none the less, thanks for sharing.

 

[boost97gst]

6766 is nearly $600 cheaper too. I mean, they are neck and neck. Great thread OP. Thanks!

 

[viperlp01]

I love the back to back testing! Where is the video

 

[kidtsi]

I'm still going with the 3794R... yup its 600 more but Why? Customers service and because I got it when it was cheaper haha. Thanks for sharing.

 

[boost97gst]

Yea, ive heard the PTE customer service blows. But theyre BB turbos are supposed to be very well built. Either turbo is obviously a monster. The 6466 is more my speed though, i would love one.
Not to mention this guy has one hell of a car to handle 55PSI! Jesus . That sit, is a well built engine

 

[compression]

On a mustang dyno nonetheless! nice!

 

[JusMX141]

Yea, ive heard the PTE customer service blows. But theyre BB turbos are supposed to be very well built.

Inside A Precision 6262 Turbocharger

Keep in mind you get what you pay for when you save that $600 or whatever.

FP's ball bearing turbos are based around the proven-reliable Garrett GT CHRA with internals and turbine wheels that don't fail without reason. When you buy a FP turbo you're getting a product that has been tested and proven through in-house R&D as well as years of success from Garrett themselves without using their customers as guinea pigs then making the customers pay for "revised" parts when the first-run parts fail like PTE does.

It's great to see the dyno results comparing both turbos....all this does for me is prove the 3794 to be the clear-cut choice given PTE's track record and use of Chinese parts.

This specific Precision shaftwheel's blades measure 1.4mm thick and this specific component is made in China by a company called Worldturbocharger, this company is well known for manufacturing "copy" products of OEM original Garrett, KKK, IHI, Holset etc – this company uses a material called K18 for the turbine head, which is a steel derivative with a high thermal ceiling, but by no means anywhere near the same quality as the Inconel 713LC material used by Garrett, KKK or Holset, hence the thicker blades on the Precision turbine, thicker blades simply mean more weight, and for any component which relies on its ability to accelerate, weight is not great. The shaft also appears to have been friction welded onto the turbine head.

 

[rr06rs]

Inside A Precision 6262 Turbocharger

Keep in mind you get what you pay for when you save that $600 or whatever.

FP's ball bearing turbos are based around the proven-reliable Garrett GT CHRA with internals and turbine wheels that don't fail without reason. When you buy a FP turbo you're getting a product that has been tested and proven through in-house R&D as well as years of success from Garrett themselves without using their customers as guinea pigs then making the customers pay for "revised" parts when the first-run parts fail like PTE does.

It's great to see the dyno results comparing both turbos....all this does for me is prove the 3794 to be the clear-cut choice given PTE's track record and use of Chinese parts.

What is said in that link is only true regarding PTE's non-cea turbine wheels. The new CEA turbines are extremely thin compared to the older thick wheels and they are in fact inconel now. I still agree FP and garret products are superior but I do believe that PTE is doing what they can to improve their products.

 

[JusMX141]

^ Right, but say you had a non-CEA 6262 and the turbine snapped and ruined the turbo....you'd send it back to PTE for service since nobody else can repair it and they'd make up some bullshit story putting you at fault for the failure so they get out of a warranty claim...charging you for the new CEA "upgrade" which uses a turbine made of Inconel which should've been used in that turbo from the moment it became available. Now the customer's paid twice for a turbo that was never built properly from day one.

That's how they operate, and there's proof that this is going on all over the internet. It blows my mind that with all of this going on guys still go running to PTE with their wallets open any time some new product is introduced.

FP has the reliable aftermarket DSM/import performance turbocharger market cornered, hands-down.

 

[rr06rs]

^ Right, but if you had a non-CEA 6262 and the turbine snapped and ruined the turbo....you'd send it back to PTE for service since nobody else can repair it and they'd make up some bullshit story putting you at fault for the failure so they get out of a warranty claim...charging you for the new CEA "upgrade" which uses a turbine made of Inconel which should've been used in that turbo from the moment it became available. Now the customer's paid twice for a turbo that was never built properly from day one.

That's how they operate, and there's proof that this is going on all over the internet. It blows my mind that with all of this going on guys still go running to PTE with their wallets open any time some new product is introduced.

FP has the reliable aftermarket DSM/import performance turbocharger market cornered, hands-down.

Can't disagree there..... even if their products gradually improve, their customer service or there lack of still continues to struggle. I still have to confess that I would gladly run a 6466 setup at the right price with my stroker because I think it would be a killer setup.

 

[danl]

Gotta agree with JusMX141, having ran both brands the FP quality control is much better than PTE.

 

[finesse49ers]

I was running a BB 6262...I'm going to a Forced Performance or Garrett.