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Turbonut
 
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With Bullseye billet wheel it should be possible. Of course 3bar FPR and at least 1.2bar boost is also needed.
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'83 924 2.5 16v Turbo, 530hp @ 1.5bar
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Old 02-06-2016, 07:07 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #81 (permalink)
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Quote:
Originally Posted by Raceboy View Post
With Bullseye billet wheel it should be possible. Of course 3bar FPR and at least 1.2bar boost is also needed.
I will also have Siemens DEKA 630cc injectors, already have full length 3 inch catless exhaust, 3 inch down-pipe, Tial 38mm WG, ECB. Will also use APR head studs. The engine will be rebuild. Will see how it works out in the end.
Old 02-06-2016, 07:58 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #82 (permalink)
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Well, v2rocket also received his kit, took a bit longer to arrive (few days) but did not get lost in post or something
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'83 924 2.5 16v Turbo, 530hp @ 1.5bar
'67 911 widebody hot-rod /2.4S
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Old 02-10-2016, 07:09 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #83 (permalink)
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Got a dyno graph from a dear customer Filip Nygren in Sweden. He modified a bit his 944 Turbo and had Dahlbäck Racing retune it: 370rwhp with bigger turbo (Precision 5558), better exhaust (earlier was stock), bigger injectors (Siemens Deka 630cc) and VEMS Plug and Play kit. Still stock ignition system.

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'83 924 2.5 16v Turbo, 530hp @ 1.5bar
'67 911 widebody hot-rod /2.4S
http://www.facebook.com/vemsporsche
Old 05-02-2016, 07:36 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #84 (permalink)
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This is good power. How that turbo compares in size to K26/8 - does it really boost only from 4000 rpm or sis they intentionally applied full throttle in higher rpm to not stress the transmission. Do you also know at what boost this was achieved?

My call is almost together - hopefully tomorrow it will start. Will tune it somewhere in the end of May after some brake in miles. Haw not decided about the tuning: dyno vs street - Gints proposed both options.
Old 05-03-2016, 10:08 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #85 (permalink)
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Boost was at 1.3 bars. And It was obviously at full throttle all the time.

This graph is actually VERY nice, you cannot expect full boost from 2000 rpm and hold 450+ hp all the way to redline. PT5558 turbo can hold torque near max for nearly 2000 rpms and that is extremely good result.

And it has full boost by 4000 rpm! Not just starting to boost. It starts to boost at 3200-3300 rpm, it is not too much worse than K26/8 for example.
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'83 924 2.5 16v Turbo, 530hp @ 1.5bar
'67 911 widebody hot-rod /2.4S
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Old 05-03-2016, 10:18 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #86 (permalink)
 
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Hi, checking in. Have you made any progress on getting the factory boost gauge to work? I understand that a lot of folks will think this is petty, but I would really like to retain this for a completely stealth install.
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Old 06-13-2016, 09:10 AM
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It reacts to intake pressure thing but haven't got a chance to fully work out correct settings for it. Hardware is correct now.
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'67 911 widebody hot-rod /2.4S
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Old 06-13-2016, 09:02 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #88 (permalink)
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What is the issue with the factory Boost gauge and making it work ?? I thought it was just a vacuum line hook up???
Old 06-15-2016, 07:16 AM
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Of course not, it is a fully electronic device that is triggered by KLR.
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Old 06-15-2016, 08:35 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #90 (permalink)
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Quote:
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Of course not, it is a fully electronic device that is triggered by KLR.
LOL ... well thank you for the answer! No need to get defense however, it was a simple question.

These cars are a PIA to work on, it's much more efficient to "ask" questions then to spend hours trying to figure crap out on one's own.

The VEMS looks like an ideal solution to me?? When I get to that point ... I was considering the "Rouge" M Tune?? But this strikes me as a better option?? At a similar or lower price point?? And seems like it's fairly "Idiot Resistant" ... I never say "idiot Proof" ...
cause there's always ... "that Guy!"
Old 06-16-2016, 08:54 AM
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Quote:
Originally Posted by chip18 View Post
LOL ... well thank you for the answer! No need to get defense however, it was a simple question.

These cars are a PIA to work on, it's much more efficient to "ask" questions then to spend hours trying to figure crap out on one's own.

The VEMS looks like an ideal solution to me?? When I get to that point ... I was considering the "Rouge" M Tune?? But this strikes me as a better option?? At a similar or lower price point?? And seems like it's fairly "Idiot Resistant" ... I never say "idiot Proof" ...
cause there's always ... "that Guy!"

I did not get defensive, sorry if it sounded like that

At 1250 euros shipped it is quite a bit cheaper than M-Tune considering that VEMS already comes with wideband lambda and you don't need to buy any loggers etc, it is all there.
Also you don't need MAF or AFM with VEMS.
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'83 924 2.5 16v Turbo, 530hp @ 1.5bar
'67 911 widebody hot-rod /2.4S
http://www.facebook.com/vemsporsche
Old 06-16-2016, 09:54 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #92 (permalink)
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Do you have a link to the software manual for VEMS?

I have a bunch of likely dumb questions in my head that I imagine the manual would clear up.

Overall VEMS looks like it would be a good fit to handle what I need for the 2.7L 951 build I have in the works.
Old 06-16-2016, 01:23 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #93 (permalink)
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You can download VEMStune from here: Vems.hu - VemsTune main site , load some default config and browse through features.

Manual/Help for VEMStune is here: Vems.hu - Help for VemsTune

If you have questions, quite a lot of questions have been answered in the thread, if you cannot find answer, ask all you want
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'83 924 2.5 16v Turbo, 530hp @ 1.5bar
'67 911 widebody hot-rod /2.4S
http://www.facebook.com/vemsporsche
Old 06-16-2016, 01:40 PM
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Thanks I found the Vems.hu site helpful. I'll have to load the software and poke around over the weekend.

With factory airbag 87+ 944T's does VEMS retain the functionality of the factory SRS controller? If I recall that unit has to send its pin4 signal to the DME relay to get the car to start. I'd assume it wouldn't interfere but rather ask to be sure.
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Last edited by Waz951; 06-17-2016 at 05:12 AM..
Old 06-17-2016, 05:09 AM
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VEMS does not care about SRS because similar to DME, VEMS activates DME relay by grounding pin 20.
Pin 4 is input from starter solenoid so it does not affect starting or functioning of SRS unit.
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'83 924 2.5 16v Turbo, 530hp @ 1.5bar
'67 911 widebody hot-rod /2.4S
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Old 06-17-2016, 08:19 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #96 (permalink)
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Got my car tuned this week. Below is the dyno sheet - I got 257 WHP at 5200 rpm and around 366 NM. The torque curve is flat from around 3100 to 5100 rpm. The lower line is boost - it peaks at 1.16 bar but generally is around 1.1 bar. From 5200 rpm it starts to drop to 0.8 bar (you can get higher boost but due to the back-pressure it does not provide additional power. The car was on the dyno for 3 hours, thus at the end when final tune was done, was quite hot. Above 5500 there was issue with the signal from the reference sensors (or some other reason that caused bad signal), therefore there is power drop at the end. Will try to fix it later.

Details about the engine:
AFM delete
OEM air filter box
Stock head nad block, except small windage ports in the block and wossner rods.
Siemens DEKA 630 cc injecotrs (not the best choice for various reasons, unless its for track car)
3'' cat less exhaust
APR head studs
Tial 38mm WG
Boost regulated through VEMS and MAC solenoid valve
rebuilt K26/6 turbo with bulsseye cold side and modified hot side (4 mm bigger wheel and housing).

The car feels quite fast compared to stock as well faster then with A-Tune

Old 06-18-2016, 02:10 PM
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Glad to hear but you should have ~270-280 rwhp easily without the spd/ref sensor issue and boost drop off.
Please ask Gints to send me the details about the signal issue, would like to help investigating it.
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'83 924 2.5 16v Turbo, 530hp @ 1.5bar
'67 911 widebody hot-rod /2.4S
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Old 06-19-2016, 10:40 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #98 (permalink)
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Glad to hear but you should have ~270-280 rwhp easily without the spd/ref sensor issue and boost drop off.
Please ask Gints to send me the details about the signal issue, would like to help investigating it.
Actually Gints had several theories that might cause this, but he is not familiar with these cars, thus he said that maybe you have some ideas. When I was putting together the engine, we tested also the reference sensors and although there was a signal coming from them, but it looked different than in the workshop manual. Maybe I should start with replacing the reference sensors?
Old 06-19-2016, 12:31 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #99 (permalink)
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Maybe. But I would scope the signals with running engine to check their output to be sure.
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'83 924 2.5 16v Turbo, 530hp @ 1.5bar
'67 911 widebody hot-rod /2.4S
http://www.facebook.com/vemsporsche
Old 06-19-2016, 12:54 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #100 (permalink)
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