Is the HKS TO4R Turbo good?

Some people have gotten some very good results from it. I don't remember exact numbers but I believe they were in the mid-high 400's

Define good turbo? Its a commonly used turbo. It can make a lot of power.

Good for what?

bump

Yes. 15 psi with a nice sized streetport should net mid 400s. https://www.nopistons.com/forums/pub...DIR#>/wink.png

Thanks for all the feed back. I meant good power wise

Ah... Well, it's capable of over 600 hp. Just need LOTS of fuel and mad tuning skills!

My turbo soon...... Just waiting on my injectors...

I rode in a friend's car last night, that has this turbo. He is having problems with fuel pressure. But, 15psi felt damn strong. It comes on mighty quick too. I didn't notice the lag at all. Maybe I was just overwhelmed though.

have u seen any that are at that high of hp? is that at the wheels or flywheel

dyno sheet?

Who else makes a T04R besides HKS?Apex'i and Garret?

The TO4R is a Garrett turbo that was originally built for HKS to sell. You can now buy them from a number of turbo dealers that sell Garrett products for substantially cheaper than HKasS offers them.

Not on a FD, no. Saw 640.XX on a Mustang.. Don't have a sheet anywhere though..not my car. TO4R.com has quite a bit of info on the turbo. Supras of course.. I know the turbo will do 600. Whether or not the car will hold up is another thing..



Are there any 600hp RX7's? Other than the full drag ones.. The Scoot one did 700 something.. but that was a T51R-SPL

what part of florida are you in?

you know any of the trini mafia people? solo creations?

do know where it was fully spooled by? I'm thinking about getting this turbo, but i read about it being kinda laggy.. https://www.nopistons.com/forums/pub..._DIR#>/sad.png so i might get a little smaller t04, but im not sure yet...

So the compressor on the T04Rs from suppliers like cheapturbo are the same as the HKS versions?

I'm located in West Palm but T-Squad is from all over, I mighta hurd about solo creation s, Neva hurd about Trini mafia , but kno some in Indian Mafia.

Laggy https://www.nopistons.com/forums/pub...R#>/violin.gif



This was my car I took rotary speedster for a ride in.



The other night I logged a couple of run's in 4th gear, In one of the I went WOT at 2900rpm and at 4000rpm's the boost was at 15psi. The other run WOT started at 3600rpm and at 4200rpm 16psi. Its a little different in other gears. But that just describe's the boost threshold??



Describing the lag on this turbo I would say its similar to my non-seq twins with the wastegate enlarged too big(doh). Anytime the revs are over 4k the boost comes on very quick. example 4400rpm 3rd gear go WOT @ 5100rpm 14psi.



Hope this helps some and dont confuse you to bad. https://www.nopistons.com/forums/pub...IR#>/wacko.png

speakin of which...

is the drivetrain capable of such a load...

Hell no!! I'm sure the cars that are at that level are either just dyno queens, or have HKS dogmissions and 300M axles and all that other good jazz... I don't think the stocker is good for much over 400... Of course, VOSKO could break it on 1 rotor with 40psi of compression... LMAO!

i also got a t04r alrthough mine is untuned it acts about the same that t04rx7 does.

so what parts would you need to help the drivetrain? i know vosko has broken alot of parts(4 trannys and more), but i talked to him, the only iteams i got out of him was, tranny and diff braces, and axles. what else can you get to help make it stronger?

The tranny can take it. The differential can NOT. Wheel hop is your enemy. Wheel hop destroys diff and diff cases.



For a stock drive train, I would upgrade the diff and put a diff/tranny brace on. That should keep everything in place. Even with my 4.777 final gear(which puts more stress on the axles) I have yet to break one(knocks on wood)

Jspec,

Which rear diff are you using? I'm looking at the Cusco MZ and RZ, not sure which is better however. The RZ's seem to be about $150 more in general and if I understand correctly, the torque transfer rate is slower than that of the MZ. Looking for a good vendor too.



I've done full suspension upgrades including rear trailing and toe links, coil overs, etc..to try and eliminate wheel hop and I've had good luck so far with no broken differentials or transmissions. I've been at the 400+ level for some time with no issues. None the less, I'm not taking any chances hence the differential upgrade.

I run one of the cusco units, but I'm not sure of they type. I bought it off of Chris(Dragon). It's a smooth one though...no where near as harsh as the kaaz diff's I've rode in.



What type of suspension do you run in the rear? I run the HKS drag suspension which is uber soft https://www.nopistons.com/forums/pub...#>/biggrin.png

Hmm, Chris recommended the Kaaz. I know theyre adustable and you can soften them a bit by swapping plates. You probably have the RZ then as it isnt as abrupt.



I have the Tein HAs but I will probably switch to the Aragostas some time this summer. I mostly do road race stuff. Only drag strip in the area is one eighth mile. Kinda boring.

aragostas are great for road racing... Tanabe's new products are great on the track too. and of course, there is always TEIN...

I'm not convinced on the one from cheap turbo. They list the compressor as a 66.5mm when infact the T04R is a 66.7mm... maybe just a typo, I dunno, just be aware.



Also, for all the people that quote having a T04R, they need to be specific if that's just the compressor. The HKS T04R has the GTQ wheel... not a P trim or Q trim. For all the people that only have the T04R compressor wheel and say my "T04R this or that" it can be very confusing since this is NOT the same as the people with an HKS T04R... apples and oranges are being compared here.



I will say that my BB T04R performs great. 15psi by 3500 and 19psi by 3900 from a 3000 RPM stab in 3rd and it pulls all the way. I saw 422 at 16 and 467 at 19psi boost, and I have a few bugs to be worked out.



-Chris

The HKS TO4R has a P tim cutback/clipped wheel. I have seen it, touched it, taken it apart, and replaced it with a Garrett P trim wheel. The HKaSs US website even shows the same exact specs as a P trim wheel.

OK, I just wrote this huge post and now I'm thinking you may be correct.



HKS lists the turbine wheel as a 66.7/74.2mm which is the same spec that I have seen for a GTQ. The P trim is actually a 66.6/74.2mm wheel. I have also seen the T04R listed as having a GT series wheel... which I assumed to be the GTQ since that's the only wheel in that size range.



I just read something that said the GTQ what closer in size to a Q, so now I need to re-look at my turbo... hmmmmmm.



I could see a P trim fitting a GTQ housing as you described...



I was reading these places:

http://www.t04r.com/specs.html

http://www.moreboost.org/turbos.htm

http://www.mkiv.com/pipermail/mkiv/Week-of...414/020146.html



I guess I'll be back.... either way, the GTQ wheel is really sweet.



-Chris

I believe you meant 64.7 and 64.6 on the exducer sizes. .1mm is like 3/1000ths of an inch. I'm chaulking it up to an error in conversion. HKaSs likes to put there own spin on other peoples things so they can get people to pay their crazy prices for ****.

oops yeah, 64.7/64.6. Could be conversions dunno.



Hmm, yeah, now I REALLY don't see it being worth getting a T04R. Much better off with a PT67H or something like that. Better turbo for the same $$$.