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Old 07-09-2016, 07:07 AM   #51
aristg
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Well .. its just 15 hours of flights probably

The first thing is that keeping the same setup means backing up 20-30 hp to keep the turbo safe from overspeed section of the map. And the next thing is that it should be at the 450 whp section to be worthy of the time and money spent on it IMO. I am sure it has at least 100 more without bumping into other limits (especially transmission). Of course 330 hp would not be bad, can get you sideways on many gears out of 5 ... but i am greedy :P

These GTX series turbos are amazing indeed, and even more the new GTX29 series. However they seem to be very early to use, Garrett does not even have a performance map for them .. and they are not even included in their catalog !!

Interesting note on the manifold, the throttle body could also be a problem (thought of it as well). I wonder, how far has anyone gone with this intake manifold ?
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Old 07-09-2016, 10:44 AM   #52
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Not sure on the intake. You could certainly get more from it with one of Nathan's pieces of artwork though.
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Old 07-10-2016, 07:21 PM   #53
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Aha .. found some info on a Greek forum taken by flow bench machine.. (can not validate these)

Throttle body ID 42mm can flow 165cfm...
48mm 215cfm
55mm 283cfm
60mm 337cfm
65mm 395cfm
70mm 458cfm
75mm 526cfm

These should be probably at atmospheric pressure, but not sure..

The same article says that a throttle body ID over 70mm on a 8V is useless and will cause headaches to the programmer and low end config will be hellish !!

There is another table, no idea about its validity as well, but values seem a bit low to me !



Maybe Nathan has some info on these ..
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Old 10-29-2016, 06:24 PM   #54
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A few more updates at post #41

Here is the link http://forums.turbobricks.com/showpo...4&postcount=41
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Old 10-29-2016, 09:37 PM   #55
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Nice update there Aris! I'm VERY curious to see what happens when you get some dyno time.
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Old 11-02-2016, 10:19 PM   #56
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I love the detail and research you're doing. Excellent build
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Old 11-02-2016, 11:21 PM   #57
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You should have seen some of our discussions when he was building the motor. Puts most engine builds to shame.
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Old 11-03-2016, 02:31 AM   #58
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True !! On top of that i should say that we are counting 1574 emails, between us !! Lots of discussion, lots of detailing ..
This project has come up to this point thanks to Gary .. I am sure that noone else could support me in this way !!

One more big thanks man !!
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Old 11-03-2016, 09:42 AM   #59
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Hey, I'm just the small player with the easy job of helping you spend your money.
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Old 01-13-2017, 07:35 PM   #60
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This is the greatest build i have ever red on any forum (and god knows i read a lot of them).

The brain behind this build is exactly what tuning is all about. Man i congratulate you deeply. You think before anything else, and never go down the common route unless you understand why it could be good.

Mad props to you. Great car and engineering.

EDIT : Broke the 500whp barrier yet ?
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Old 01-13-2017, 08:28 PM   #61
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He's been a bit under the weather lately, along with the weather being ugly. Should hopefully see an update before too long though.
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Old 01-15-2017, 07:59 PM   #62
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@kingkong Thanks man for all your very very nice words !! It is true that it has been a long effort, gathering the knowledge of many in here, especially gsellstr, and local people, which made this project plausible. Add to that the supply of parts from the same great man (gsellstr), and you got this result.
I am fighting some minor start up problems (probably the flywheel sensor), while weather is surprisingly bad in Athens so i can not do any proper road tests-tuning. Hopefully within 1-2 months i will have the answers for the 500 whp barrier, and at last post a nice video here
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Old 01-16-2017, 03:13 AM   #63
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so you have no boost creeping with that single twinscroll wastegate setup?
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Old 01-16-2017, 03:46 AM   #64
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Up to what i have tested, close to 1+ bar, no. I need to program the ECU at full pressure to see what happens up there. However my logic says, since gas pressure is sufficiently dumped, no creep will be present.

I don't remember if i have posted it before, but here is a very nice test, about TS and wastegate setups ON A SUPRA
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Old 05-02-2017, 06:38 PM   #65
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The project is almost complete .. in terms of engine !! The story continues at post #41

Here is the link http://forums.turbobricks.com/showpo...4&postcount=41
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Old 05-02-2017, 08:08 PM   #66
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Glad to see you've finally reached that point where more power becomes exponentially more expensive! lol

If it were me, I'd just drive it at that power level and enjoy. Sounds like more than enough power to play with, troll people with, and get you arrested if you're not careful.
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Old 05-03-2017, 05:34 PM   #67
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Here is a little video from the dyno session.. If i remember correctly it is run 30 (0 degrees on the cam) which produced the maximum output.

https://youtu.be/BnVhiCSNMOs

The "disco" situation inside the car is because passenger's door was not fully closed
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Old 05-04-2017, 12:48 AM   #68
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I love the way you write English in the big posts. It's quite distinctive. Nice work, all up! Looks like lots of fun, and quite a handful indeed :-)
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Old 05-04-2017, 12:52 AM   #69
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Sounds nice!
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Old 05-05-2017, 06:16 AM   #70
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Thanks a lot guys !! Your appreciation means a lot to me !!

Seems that i could achieve more things with E85, but unfortunately it is not available here.

@Gary: Seems that i need to find another way to spend .. actually already found it .. coilovers :P Get ready for it !!

@FreeEMSFred: Well, must be the mix of Greek-English in my head Glad it is understandable though ..
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Old 02-12-2018, 06:23 PM   #71
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Some interior changes @Post #41 ... http://forums.turbobricks.com/showpo...4&postcount=41
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Old 02-12-2018, 10:07 PM   #72
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Looks good now that I'm on the computer!

FYI, that amp you ordered up is the same one I have in my wagon. Really does do nicely for the door speakers!
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Old 02-13-2018, 03:42 AM   #73
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Good, i just need a proper location to install it. Where have you put it ? Behind the radio ?
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Old 02-13-2018, 11:29 AM   #74
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The 740's have a factory amp on a bracket behind the cluster, that is just about the same size as the Alpine amp. Since everything is already there, a couple BIG zip ties to secure it to that bracket and all is well. Hard mounting wasn't an option given the stock bracket design, otherwise I would have gone that route.
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Old 02-15-2018, 07:28 AM   #75
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Outstanding B21 build...... we knew they could make some real power!

We are spoiled rotten here in the States, with easy access to everything except M90s.

It is refreshing to see science applied, rather than the typical TB tomfoolery.

Congrats on a well built 4 cylinder.
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