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Engine Specific Info and Questions => IDI Engine => Topic started by: Powered by Spearco on June 05, 2011, 08:25:45 pm
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So the last time I set my pump timing to what Giles said to was 1.0mm. It starts right up, hardly smokes but once at operating temp. driving it in town, it sounds really rattley. So I backed off some timing by ear till no more noise was present. I double checked what the actual timing was with a guage, (.63mm) :o, and thats what I dyno'ed with.
So for the hell of it, I thought I would bump it up to .80mm for the drag strip. Thinking more timing would yield more PWR. its hard to say unless I re-dyno it again to compair. But just driving down the road, its rattley again? So once home, I re-timed it to what it was before.
My question is, is there anyone else that has the same franken engine build that I do, (as far as head, block, pump and injectors) and what is your injection pump timed to?
My injectors are 1.9 AAZ dual spring style with GTD nozzles set to 155 bar. The pump is a Giles special with all the fixens along with a TDI 10mm head and plunger to match. Giles did all the pump stuff.
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Did Giles have these specs when he built your pump?
My injectors are 1.9 AAZ dual spring style with GTD nozzles set to 155 bar.
My understanding is that his pumps are tuned to the type of nozzles you tell him you have.
I have a 1.6 NA and it sounds "Marbley" in the mid ranges from just off idle to about 2000 rpm I think. Don't have the tach I would like to have on it. Once I am up and cruising at 35 or so it smooths right out. Not really worried about it, yet.
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At first, I told him 1.6TD injectors with GTD nozzles, but again the same concern. So I tried the AAZ injectors. Both 155 Bar.
When I swaped over to the dual spring injectors I also changed the delivery valves with the recommened shims that Giles offered.
I remember Sauerkraut saying something about a higher breaking psi, but I don't remember why. I gotta search his build and see what he said.
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Come on Andrew, say something ;D ::). You build pumps. ;D
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I ran my franken motor at 1.00mm for 10,000 miles, and I finally bumped timing to 1.15 and it is much less rattly at mid unboosted throttle., and about 8mpg gain. Egts are down a lot too, it's about 110-115hp now, and on a 0-60 run it won't be over 900f. 65mph = 575 egt every time. 75mph is 600. 55 is 475 : )
so although I have a stock tuned 1.6td pump and 1.6 nozzles, I thought you should bump up your timing to quiet down a franken motor.
and finally, if you want something to drive and sound stock, don't build something not stock ;D
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Lol.
Yeah, I guess I shouldn't complain. After all, its going to be driven full throttle a quarter mile at a time anyways.
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When I pull the engine out of the truck, its getting a stock FW and I'm going to pull the head off to see how everything is doing.
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With my engine I have marbles running around in it when in town. I have tried .95 to start with. And then I tried 1mm and that sounded the same except when I got on it full throttle. Then I had some weird ultra loud noises from under the hood. So I backed it back down to .95 and same thing. Turned the water injection off and still there. Moved the timing to 1.04 and now it seems better on the top end. Need to climb a hill next to the jersey barrier. Cant hear the rattle from inside the cab but roll the window down and drive next to a jersey barrier. You can hear the engine loud as day. If I still hear it I will move it +- from where I have it now.
My injectors are stock rebuilt by Giles and the pump is a super pump that is turned in a 1/2 of the fuel screw. Boost pressure is at 38psi. Don't know much about the pump other than that. Oh yeah, I also have my boost pin out. All fuel delivery is controlled by the skinny pedal.
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Wow. Thats some great info. Thanks.
It's been a year sence it was timed that high, but I'll try it again and check coolant and EGT temps again during warm up and a full throttle blast to compair to where its at now, .63mm.
For me, just driving down the freeway, I can hear how load its rattling. It seems like it could be doing damage to the crank journals or rod bearings.
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Wow. Thats some great info. Thanks.
It's been a year sence it was timed that high, but I'll try it again and check coolant and EGT temps again during warm up and a full throttle blast to compair to where its at now, .63mm.
For me, just driving down the freeway, I can hear how load its rattling. It seems like it could be doing damage to the crank journals or rod bearings.
the more retarded it is, the more boost and EGTs you will have..
my car was making 40 psi boost when i blew the head off the block.. turbo was singing like a supercharger..
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I would time it by ear and smoothness and not worry about the number. There's a lot of variables that are changed with a franken engine and custom pump that make the dial gauge measurement kind of useless.
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Useful reading here, I've got a 1.9/1.6 engine, 155 BAR injectors and a 10mm TDI pump too.
My pump has been timed to 1.2 on the bench, as I finally bolted in the engine on custom engine mounts only last night, I cannot add my experience yet too this thread, but hopefully very soon.
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What turbo do you guys have on your frankenmotors? I have an aaz-big k14. The turbo probably has a lot to do with cruising combustion rattling, small turbo = more boost cruising.
AHU motors with k03s run max boost at anything over 75mphish and they are super quiet running motors..
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ko3's are a good turbo. Max boost by 1900, and efficient almost to red-line. They could stand to be turned up to 15-17 psi though..
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I timed mine by ear. I have no idea what its at right now. I can check tomorrow and post in this thread. Mine seems to run pretty ok. Cold starts are a b1tch, but I dont have the advance cable hooked up either. After a good rev session when cold, it runs fine, no misfires and less smoke. I speculate that I currently have around 130whp. turbo is a gt2056. not ideal at all... but better than some others ;)
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I'm using the Mercedes T3, 45 trim turbo. Very laggy. Yes you can daily drive it but you goota hold it full throttle till 5K to have any fun with it. But it was built as a race engine, not a uber hyper mileage engine.
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I just want to get a quick word in on the cold starting. Mine smokes white for the first 45s of starting, even when it was 80f this morning. haha. Some may call this a "cold start issue" but she started at -12f this past winter with no block heater. Anyone else get smoke with a cold engine and a warm ambient temp?
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Yup. People look at me funny too ;)
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My Giles pump is timed to .0378" {he said to go to .374"} Mine started no block heater at -15F. Mine is a 1.6 head and I still will have smoke if I don't pull the cold start for 5 minutes of idle. I have smoke when colder than 50F for at least a minute with the cold start pulled. Gone once warm though.
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mine smokes grey on every startup, and still starts no trouble all winter.
I don't know what advance I am running in VW terms(have not stuck a dial indicator in it yet) but its lots, and the advance piston cover has been modded for lots of dynamic advance too.
helps lots when burning lots of fuel
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I've a very similar setup and it sound like a bag of spanners, VERY LOUD.
I've ran the timing all over the shop and settled around the original 1.2mm, less and the idle got worse to the stage it wouldn't idle. Also it would pour white smoke.
More than 1.2 and the clack would get much worse.
I'm so concerned that I'm doing serious damage to the components, I pulled the pump last night and started to swap it back to a 9mm head.