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IMPORTANT: enter the case-INsensitive alphabetic (no numbers) code AND WRITE SOME SHORT summary of changes (below) if you are saving changes. (not required for previewing changes). Wiki-spamming is not tolerated, will be removed, so it does NOT even show up in history. Spammers go away now. Visit Preferences to set your user name Summary of change: '''Jonas Wikströms Volvo 142''' http://www.vems.hu/files/MembersPage/MattiasSandgren/VolvoB20/jonas_volvo_142_winter.jpg ---- The engine in this car is a stock Volvo B20 with a need of retirement. A refurbished B20 is taking it's place only with a very much upgraded head and longer stroke. Basically this engine is an inline 4 cylinder, with no electronic control over anything. * 2.0 litre inline 4 cylinder Volvo B20A, completly stock * Custom crank trigger with Honeywell GT1 Hall sensor * Single coil and distributor ignition * Sequential fuel injection with no cam sensor and high-Z 192 cc/min injectors * Custom intake manifold adapted from Volvo B20E/F engine * Custom engine harness [http://www.vems.hu/files/MembersPage/MattiasSandgren/VolvoB20/config.txt config.txt] and [http://www.vems.hu/files/MembersPage/MattiasSandgren/VolvoB20/tables.txt tables.txt] The future upgrade is a stroked and bored B20 block with a heavily ported head and aggressive cam (300 degrees duration). The fuel injectors will be 300 cc/min with the possibility to run alcohol fuels. Approximate crank power is 170-180 hp, compared to the stock 85 hp. The intake manifold has been ported out and the throttle replaced by a flange for a removeable 65 mm BMW throttlebody. Fittings for a fuel rail and regular Bosch injectors has been welded to the runners. The runners have been ported out and smoothed. Here are some pictures of the manifold as it is mounted. [http://savarturbo.se/stuff/images/sugen_142/insug/PICT1327.jpg http://savarturbo.se/stuff/images/sugen_142/insug/tn/PICT1327.jpg] [http://savarturbo.se/stuff/images/sugen_142/insug/PICT1328.jpg http://savarturbo.se/stuff/images/sugen_142/insug/tn/PICT1328.jpg] [http://savarturbo.se/stuff/images/sugen_142/insug/PICT1329.jpg http://savarturbo.se/stuff/images/sugen_142/insug/tn/PICT1329.jpg] [http://savarturbo.se/stuff/images/sugen_142/insug/PICT1330.jpg http://savarturbo.se/stuff/images/sugen_142/insug/tn/PICT1330.jpg] Not that there is no throttle linkage, it will be fixed later this week. Also, the engine bay is not that pretty but that will all be sorted out after the engine has been replaced. The intake was gutted to get it ported out and then welded shut again. [http://savarturbo.se/stuff/images/sugen_142/insug/PICT0741.jpg http://savarturbo.se/stuff/images/sugen_142/insug/tn/PICT0741.jpg] Here are two pictures of the custom trigger wheel we made for this and a few other VEMS installs on this type of engine, it's simply a disc welded on to the stock wheel that drives the generator. [http://savarturbo.se/stuff/images/sugen_142/trigger/trigger_b20_fram_bak.jpg http://savarturbo.se/stuff/images/sugen_142/trigger/tn/trigger_b20_fram_bak.jpg] [http://savarturbo.se/stuff/images/sugen_142/trigger/trigger_b20_closeup.jpg http://savarturbo.se/stuff/images/sugen_142/trigger/tn/trigger_b20_closeup.jpg] ---- '''Update 2005-10-07''' This car has been started up with VEMS as of today, ignition only. Trigger is through a Honeywell GT1 at the crank with a custom trigger disc. Spark is through the stock distributor, the car is already running much better due to not having to rely on worn points in the distributor. Fuel is for next weekend, everything but the fuel plumbing is done. Stay tuned. '''Update 2005-10-15''' Today the carburator was removed and the fuel injection manifold was mounted to the head. Started right up after increasing cranking pulsewidth and thereafter req_fuel to get it idleing. You can download a short movie from the moment we got it to idle well, right [http://media.savarturbo.se/jw/jonas_b20_vemsified_20051016.mov here] (15.4 MB). '''Update 2006-05-24''' Firmware 1.0.36 was installed and we remapped the engine. This coming weekend the old engine is coming out and within a week we hope to have the newly rebuilt engine in place. One problem arose, but I'll probably sort it out later. Above 3500 rpm at full throttle the pulsewidth of the injectors would open up 30-40%, just for a split second. I verified that ALS and acc enrichment was turned off but could find nothing that made sense. Here are the files: [http://savarturbo.se/~mattias/motor/vems_data/datalog200605242243.xls datalog] and [http://savarturbo.se/~mattias/motor/vems_data/megasquirt200605242254.msq msq file] If anyone can see any setting that I've missed or anything out of the ordinary in the logs, please advice! The firmware is the one that comes precompiled with the 1.0.36 package. The TPS is not connected and shows a constant 60% input. '''Using pressure based acc enrichment''' * only adds 1.5 ms when in use: where is this data from ? config / logs / megatune runtime display * nowhere close to the 6-7 ms increase that you see in the logs. Are MAP / CLT / MAT values stable during these transients ? ** if you don't have the AREF=256 mod, see bottom of BuildProcedures/SectionThree ** since 1.0.38 is better tested than 1.0.36, an upgrade might be a good idea ** what are the uploaded temp tables ? If airden table is non-monotonous, it can severely effect pulsewidth. If you have custom tables, publish vems.hex that verifies identical against your flash. You can load the msq file into MegaTune while not connected to a Genboard and verify all the settings, or simply look at the msq file with a text editor as it will reflect all the values from a mcd dump. ---- Optional: Add document to category: Wiki formatting: * is Bullet list ** Bullet list subentry ... '''Bold''', ---- is horizontal ruler, <code> preformatted text... </code> See wiki editing HELP for tables and other formatting tips and tricks.