MK5 Golf GTI
All Things Mk5 => Performance Modifications => Modifications & Technical Area => Revo Zone => Topic started by: fuscobal on March 06, 2010, 11:57:49 pm
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Hello guys. Car has a stage 3 Revo software and has the following mods :
2006 Black Magic GTI | Milltek Non-Res Turbo-Back | BSH 27mm RSB + H&R 26mm FSB | BSH pendeleum mount | Evoms V-Flow| Stri Racing gauges | PCV fix | Sachs racing clutch | Forge Short shift + 42DD/FFE bushings | Bilstein PSS10 | Peloquin LSD | K04 turbo | S3 injectors | IE rods/Calico bearings | S3 front brakes + Tarox F2000 discs + DS2500 pads | S3 FMIC | S3 camshafts | Autotech fuel pump | 235/35/ZR19 GY F1 asymmetric on BBS RS-GT | REVO Stage 3
Here's my latest logs and dyno (Revo setting used was 9-8-9):
http://img197.imageshack.us/gal.php?g=fuscobalmotorcp.jpg
Car seems to run great. What I'm a little worried about :
- Exhaust temps of over 999 degrees
- The little dip in the boost response at around 5000rpms
- Actual fuel pressure is 3-5 bar under the requested of 130 bar (I've ordered the RS4 pressure valve wich is rated at 136 bar and I've heard cured this problem)
- The low pressure seems to be pretty low compared to the requested (this might be also related to the high pressure system
- Timing retard seems to be a little to much (maybe I should set timing from 8 to 7 ?)
Any comments would be highly appreciated !
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i notice you have a dip in boost same as me in 5600 to 5800/6000 rpm, any reason as to why??
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Not really but I'd like to find out. DV is in perfect shape, I've checked it. The dip wasn't there one year ago when I switched to stage 3 and made logs. In the meantime, due to a defective rod bearing that worn above limits, I opened up the engine and replaced the bearings with Calico race bearings and also added IE forged rods. I've also cleaned the valves wich were so full of deposits, I could barely see the through the holes. After cleaning the valves, the engine was much more responsive in low Rpms !
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Did you fit the rs4 valve and did it help?
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I did fit it and the logs show the valve is holing more pressure but the graph is more irregular now (oscillating like a wave). I'll post a comparative graph before and after !
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Hmm did you have any flat spots in the rev range before / after?
does it drive ok?
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Yes it drives ok but it gave me limp mode 2 times at about 2500 rpms and only while driving normally (very slight acceleration). On 2000-2500RPMs I feel like the boost builds almost too soon for this turbocharger (like a k03) and I suspect the software sees this as being wrong. Under WOT everything is fine !
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hmm and was this only after the valve was fitted? what software was you running at the time? and was this on the uprated turbo?
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Yes man, I had all the mods you see in my sig. I've only replaced that valve !
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Was the part number - 079130757
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Yes, that's the correct part number for RS4 pressure regulating valve !
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Are you still running timing on 8 and fuelling on 9?
Timing should only go above 7 if you are using race fuel, octane booster or water/meth.
I run fuelling on 6.
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Yes, it was 9-8-9 the setting but everything seems fine. It also depends on the gas from each country. I've now lowered to 9-7-9 and this is probably what I'll be using on the ring ! What setting are you using on the ring Hurdy ?
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I'll be taking my PC and SPS+ controller with me and trying a few settings. The fuel there is 100 ron and so will most likely use timing 7. Boost will stay at 7 for now as the actuator seems to give overboost above that, which adversely affects top end power. Fuelling will be 7 too most likely, so that would be 777 as a baseline :smiley:
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egt's of over 999 . i mwould stop driving it hard and get it booked in and looked at anything over 850 is bad news
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I'm driving the car this way since more that 1yr ago when I've installed the k04 setup. I've even been to Nurburgring with this setup. I know something about EGT being lower than 900 degrees but can't remember if it was median exhaust temp or catalytic converter temp as they can be logged separately !
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around 900 is the accepted constant max temp but non prolonged times above that temp it isnt a problem.
The issues seem to centre around.
1. Where and how the temp is measured is very important. some figures mean nothing, others critical
2. VCDS logging isnt reliable either (apparantly)
3. when you go mapped the tuners can and do alter the temp values / hardware protection mapping, so what you think you are seeing generally cant be relied upon.
I found this post useful (K03 but still relevant)
http://www.golfmkv.com/forums/showthread.php?t=115731
(ignore the usual APR/REVO fanboys/bunfights)
So in essence.
1. you could have an issue that causing too high EGT's
or
2. logging makes it look like you have an issue but in reality you dont.
REVO themselves should clarify the block to use and what numbers are good/bad :happy2:
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Talked to REVO dealer and he said the logs look fine and there's nothing to worry about. He said the software was made in such a way that if the EGTs were too big, the software would automatically lower boost or close the throttle body to protect the engine !
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thats the controversial hardware protection mapping.
I'd want confirmation from REVO HQ (not a dealer) that 999 is ok (which is the max value, so it could be any value above that....) for your stage.
If so then :happy2:
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another chap asked a similar question over on seat cupra - in short revo claim the sensor over-reads when compard to a probe to the tune of 80-100 degrees - but if your pinned at 999 like yourself then you need to run a lower fuel setting (more fuel) and more timing advance
http://www.seatcupra.net/forums/showthread.php?t=252182 (ftp://http://www.seatcupra.net/forums/showthread.php?t=252182)
hope that helps