DogWhistle said:

In fact I do

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What version of the 68HTA was this?

hey guys, keep in mind that a bigger wheel and looser housing does not automatically mean more airflow. The turbine still has to extract the same energy out of the exhaust stream. If it does a shit job of that, it will need even more exhaust flow through the turbo to do it, meaning higher backpressure.

even the larger turbine and housing doesn't seem to be holding power much better in higher RPM. ECU controlled boost solenoid helped a lot of my issues on my Evo with that.

mean4g said:

Gofer is the man, and has an impressive build. I will admit I do think his also does spool quite slow but he makes impressive power. I hit 20 PSI @ 3700 with FP2s, JMF Street SMIM, DNP manifold, Q45 TB, 28x12.5x3.5 bar and plate intercooler, etc. However with all that being said I had the 7cm housing and the TD05H turbine so quite a bit different from urs and even gofer (he has the 8 cm housing on his). In no way was I bashing, I was just surprised how slow it spooled. I do agree with Gofer that the new TD06sl2 sized turbine wheel will have a much flatter power curve and hold power better past 6500 than a single scroll TD05H variant, you just have to give up a little spool for it (more than I thought).

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No problem man...I knew you weren't bashing. Is a bit of lag but the pull up top is nice also I'm gonna be running water/meth with this turbo and go as far as I can with it should be fun

mean4g said:

even the larger turbine and housing doesn't seem to be holding power much better in higher RPM. ECU controlled boost solenoid helped a lot of my issues on my Evo with that.

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Yeah I was gonna run a grimspeed 3 port electronic boost controller but just stuck with the manual for now...should try the other one and see how that differs.

Dan90tsi said:

Yeah I was gonna run a grimspeed 3 port electronic boost controller but just stuck with the manual for now...should try the other one and see how that differs.

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I loved my 3-port grimspeed. I made 400/400 on my twin scroll Evo 8.5 turbo on my JDM Evo 7 with a power curve to die for. Good luck with the build!

I'm just starting to get the car dialed in on the new setup. I made a lot of changes all at one time, one of them being the addition of FP's new 68HTAs. I've got some more tweaking to do to get this to where I'd like it to be, but overall I'm pretty happy with how this turbo performs so far.

Important things to note, I'm currently on E85, and have stock cams installed. I'll eventually make the swap back to HKS 272s or something similar, and expect that will probably hurt spool some.

As I said, I'm still working out a few small bugs with the car. End goal is to have this on 30+ PSI.

Thoughts on the new 68HTA:
Spool up is comparable to the bastard 20G I was running previously. The car has much more top end (even on stock cams), and the boost doesn't spike and then drop off like my TD05H variants always did. I ran this turbo for a short time on 93 octane as well, and the car was less prone to knocking. The only noticeable drawback I've really observed is that the transient response feels a bit more laggy. I'll need to collect some more data before I can really make a good comparison between the two turbos, though.

Overall, I think this is a great f***ing turbo, especially at the price point. Of the few bolt-on stock frame turbos available to us, I'd definitely say this is a good choice if you're willing to sacrifice a bit of spool for significantly more airflow up top. At redline, my bastard 20G was moving around 41 lbs/min @ ~25 psi. In contrast, I'm logging slightly over 47 lbs/min @ 25 psi on the 68HTA. Of course, results may vary, so these numbers aren't gospel, and I'm not saying they are. I'm just sharing ACTUAL DATA derived from my own setup with the community.

Below is an initial tuning log of a 3rd gear pull and some screenshots from that log. Again, this is on E85, stock cams, and FP's new 68HTA. Turbo specs below.

Forced Performance 68HTA turbo:
--- TD05H compressor cover
--- Compressor (51.2MM Inducer / 68MM Exducer)
--- Turbine (60.8MM Inducer / 54MM Exducer)
--- Internally gated 8cm^2 turbine housing

20 PSI @ 3,735 RPM


25 PSI @ 4,171 RPM

Brett I have a question, You said you're running the new 68HTA

GST with PSI said:

Below is an initial tuning log of a 3rd gear pull and some screenshots from that log. Again, this is on E85, stock cams, and FP's new 68HTA. Turbo specs below.

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But the new 68hta (71hta) is actually a td06 cover correct?

GST with PSI said:

Forced Performance 68HTA turbo:
--- TD05H compressor cover

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Sorry, I'm just trying to clear it up as I wasn't sure if it was a mistype or not, I was under the impression we had the same turbo

19gsx91 said:

Brett I have a question, You said you're running the new 68HTA

But the new 68hta (71hta) is actually a td06 cover correct?

Sorry, I'm just trying to clear it up as I wasn't sure if it was a mistype or not, I was under the impression we had the same turbo

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The 68HTA uses a TD05H compressor cover punched out to 56mm.

http://www.forcedperformance.net/me...uct_Code=NTDSMFP68HTA&Category_Code=DSM-Turbo

Ohh. I thought it was mentioned on the FP 68hta vendor feed that they didn't actually update the information on their website and that it was the specs of the old 68hta, Sorry for the misunderstanding.

No, you're right in the sense that FP hasn't always been the best at updating their website. That's true. But, the compressor cover is indeed a TD05H style cover. It is, however, FP's own cover, not an actual MHI unit. This is a perfect example of FP's website being out of date, as there's definitely an MHI cover pictured for the current 68HTA.

Regarding the cover, I've actually seen two types being shipped on the new 68HTAs. The inlets are slightly different sizes, and the machine work is definitely different. On one of the cover types, there's a noticeable step/lip on the inlet:

Here's a pic of a buddy's cover on the 68HTA he received. The inlet measures 54.5mm. Also, notice the obvious step cut into the inlet:





And here's a picture of mine. It measured 2.065" (~52.5mm). Notice there's a smooth transition from the inlet all the way to the compressor blades.

Love that some are still playing with the 68hta!

I'm actually backing away from it and shifting back into an evoIII, I feel that I may at some point regret it but ATM full boost at 4k isn't working out for my daily driver.. That being said I did run into a nice big block chevelle on the highway and we did a couple 3rd gear runs and he was pretty impressed his merlin 560hp 540ci couldn't pull away from me (turned out we were both going to the same car show).. I'll miss that in the evoIII but those moments don't come by often. I'm just too used to low-midrange torque, not knocking anyone or putting this turbo down by any means. but it is not for everyone.

19gsx91 said:

I'm actually backing away from it and shifting back into an evoIII, I feel that I may at some point regret it but ATM full boost at 4k isn't working out for my daily driver.

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I agree with this turbo not being suited for the average daily driver. This turbo, as well as most of the others that are comparable (20G, FP Green, etc) aren't great for daily drivers, either. What people need to do is get away from comparing this turbo to an Evo 3 16G...It's not a 16G. Now, the TD05H 68HTA variant could be compared to a 16G, but this new 68HTA is another animal entirely. As I said, it compares closer to the turbos I mentioned above, IMO.

If I wanted great spool and good performance on a daily driver, I'd stick with an Evo 3 16G, a bastard 20G, or maybe even the original TD05H 68HTA variant. Namely, I'd stick with a stock frame turbo with a TD05H turbine. That's not only the best bang for your buck, but they perform awesome, and are easy to repair and maintain of need be.

GST with PSI said:

If I wanted great spool and good performance on a daily driver, I'd stick with an Evo 3 16G, a bastard 20G, or maybe even the original TD05H 68HTA variant. Namely, I'd stick with a stock frame turbo with a TD05H turbine. That's not only the best bang for your buck, but they perform awesome, and are easy to repair and maintain of need be.

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Yeah, for some reason when I purchased it I was pretty in love with the research I'd done, which is my own fault because I didn't really take it into consideration the old 68hta vs the new. I think I'm just gonna end up putting the 68hta on a shelf in a corner and hope someone puts the MHI tdo5 variant up for sale.

I ran this in a 2.0 and liked it. It has more power up top than the Evo 3 I had in there previously. Spool was about 20psi at 4200 rpm with BC 272's. However, I did miss the way the 16g kicked in compared the 68hta.

Engine spun a balance shaft bearings so this time a 2.3 is going in its place along with some HKS 272's. I'm hoping the stroker makes the daily driving a bit more fun and gain some spoil time.

Just got my car back in semi working condition, haven't been able to get a good impression racing it yet as I was dropping oil and have an ABS issue. This is a 2.0 block with 9:1 compression, ETS 7x3.5 intercooler on 93 octane.

I'm thinking the dyno sheet isn't listed correctly saying 11psi is 313hp / 305tq. Thanks for your update though! It's nice to see guys still playing with this little guy! I sold my 68hta a while back, and sorta miss it!

Great numbers for pump gas on a Mustang dyno. Have any idea about the RPM you hit 25.5psi, I don't see any RPM data on there other than min/max. Just trying to see what spool-up looks like on this version of the HTA68 since that's what everyone seems so concerned about.

90laserRSfwd said:

I'm thinking the dyno sheet isn't listed correctly saying 11psi is 313hp / 305tq. Thanks for your update though! It's nice to see guys still playing with this little guy! I sold my 68hta a while back, and sorta miss it!

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11 is the AFR in the "MIN" column, if you look under the "MAX" column it shows boost @ 25.5psi.

Yeah I saw that Corey, I'm talking about up near the top it says "license" run 1 11psi.. That just threw me off ..

90laserRSfwd said:

I'm thinking the dyno sheet isn't listed correctly saying 11psi is 313hp / 305tq. Thanks for your update though! It's nice to see guys still playing with this little guy! I sold my 68hta a while back, and sorta miss it!

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11PSI is the license plate on my STX car, this car didn't have a plate when I dropped it off.

gofer said:

Great numbers for pump gas on a Mustang dyno. Have any idea about the RPM you hit 25.5psi, I don't see any RPM data on there other than min/max. Just trying to see what spool-up looks like on this version of the HTA68 since that's what everyone seems so concerned about.

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I think the light blue line is the RPM and boost is the purple line, I'm used to seeing rpm in the horizontal axis instead of "time". A quick eyeball of the graph seems to put max boost around 4200-4500. This is the 7cm housing.

Where did you run the dyno at?

This was a long time coming but i finally got my first generation HTA68 tuned on both pump gas and e85. This is their older MHI unit with the tdo5 turbine wheel, 7cm hotside, and interally gated.
Important mods: Built 2.0L 6 bolt 8.3:1 compression / 2g 7 bolt head / HKS 272s / Evo 3 manifold / Evo 3 Intake manifold / Evo 3 o2 housing / 3 inch exhaust / 1200cc injectors / 320lph fuel pump

Pump: 325hp / 285qt @ 25psi
E85: 401hp / 380 qt @ 28psi

A very long time coming, glad to see you finally got it out there. Can't believe Sam let you off the dyno without taking her to 30psi.

Nice work Daniel, good numbers! I'm thinking of throwing my new version in a 7cm housing. I have a friend that can help me machine it. I'm using the gvr4 with the 14b right now for autox and love it. I'm thinking the 7 will give better results than the 8 for my needs. What you guys think?