06-18-2020, 05:20 PM | #883 | |
Steve Bodalenko
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Last edited by Bodalenko; 06-18-2020 at 10:41 PM. |
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06-18-2020, 05:39 PM | #884 | |
Steve Bodalenko
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Interested in your driveshaft replacement. Still debating going that way and was considering the aluminium. I’ve heard NVH goes thru the roof with them so given I have STI mounts, drivetrain/subframe/diff inserts, and a noisy IRP shifter, if I do I’ll go the CF version. |
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06-18-2020, 10:26 PM | #885 |
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Yeah, the prop shaft does make a very very noticeable change to NVH... and carbon ( in my experience) is pretty much as bad.
But I do have a rear seat delete, so without the seat squabs, it might be a little less noisy for you. And I have also kept standard bushings and mounts throughout, so it could possibly not be any quieter too. It is definitely one of those mods that if you don’t actually need it, I wouldn’t do it. |
06-18-2020, 10:59 PM | #886 | |
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Just wondering how you’ve wired you FlexFuel kit. For whatever reason Harrop wired mine straight to the pos battery terminal so it’s powered all the time. I’ve checked with Zeitronix re current requirement and they say it’s minimal and nowhere near in need of high amps. I’m intending to change it to a relay triggered by the power outlet in the glovebox. Only issue I’m aware of triggering it via an ACC powered source is the power for ACC cuts out when cranking so may effect the FlexFuel module. As for our gearboxs, Neats in Adelaide have a hardening/shotpeening process that strengthens the gears. $2500 for the 86.. |
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06-18-2020, 11:10 PM | #887 |
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@Bodalenko
Zero added NVH with my DSS carbon fiber DS, both before and after engine mounts, trans insert, rear diff inserts, na, and fi. I think i did fluidampr crank pulley at same time. As well as under driven/over sized water/alt pulleys. |
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06-18-2020, 11:16 PM | #888 |
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@Bodalenko
My zeitronix FF kit is only wired to the rear o2 plug in, and one extra wire to a ground. |
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06-19-2020, 04:38 AM | #889 | |
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His experience seemed to be similar to mine in terms of NVH, with both his and his customers cars and his thoughts were that the standard shaft is split and mounted the way it is for a reason. I’ve certainly been happy with the performance of the alloy shaft, and if all other things are equal the big extra cost of carbon is probably not worth it (at these power levels at least). As always though, others experiences might be different. I’ve gone down the weight reduction route, so I run a lightweight crank pulley, and the standard engine mounts seem to isolate ok. My NVH is pretty much all drive train, from clutch to diff. I don’t know about my flex kit wiring....that was fitted when the bottom end was upgraded. But I think there are some circuits that do stay live during cranking. The best bang for buck weight saving ( to compensate for the supercharger add) is a lithium battery... pretty much 9kg instantly, and they are much cheaper than they used to be too. |
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06-19-2020, 06:04 AM | #890 |
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That interesting re the no difference re the drive shaft. I was under the impression there was a night and day difference. That’s $2k saved if it’s good but too noisy. I’m past driving mechanically noisy cars. Unless it’s for a sequential gearbox.
So just wondering what the major difference was when you had the motor rebuilt with regard to the performance of the Harrop and drivability. Without being specific here was the rebuild an expensive project? Anything you’d do differently now it’s done.. |
06-19-2020, 07:22 AM | #891 | |
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Small pulley made a huge difference, it does now go properly quickly....but its not cheap to get down to that small pulley. I went down the low compression path with an IAG stage 2 bottom end (which in itself is extremely good value, and beautifully done). But then all the add ons get going... stronger studs, injectors, uprated valve springs, gaskets, heads all redone, fuel pump another ECU tune etc etc. I ended up having some dramas with my ECU/tune/EcuTek and so took the chance to change over to a Motec... mega expensive, but amazing capabilities which allow a tuner to do things and interpret things they couldn't otherwise be able too. It also works in with the standard C-Bus/loom, so stuff like your aircon, cruise control etc operate as per normal, and has nice integrated loom connections too. But you don't need it...and at aud $6300 just for the basic box...its an indulgence (you would %100 need it though if you went sequential for example). You need to upgrade drive shafts, (and oil/water cooling too which I already had) Overall it wasn't too ridiculous...probably ended up around the aud $14000 area including labour. (I'm lying, with the Motec and tune it was over $22000 and then $25000 at the same time for some weapons grade dampers...wife still has no idea...I'm dead if she ever does...) Drivability is no problems, aside from the previous issues with cold start on E85, on 98 was all sweet. I have the driver aids all switched off permanently (aside from ABS) and its no great dramas (I've got a rally background, and have always played with RWD cars).... although in the wet it can get ugly, even on the freeway in 5th.... |
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06-19-2020, 07:59 PM | #892 |
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Have you by chance came across a larger (than OEM size) crank pulley? That is what harrop reccommended to me when I asked about machining down the s/c snout to drop below the 65mm option.
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06-19-2020, 08:54 PM | #893 | |
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I think you will need to have someone make one for you. I haven't seen any. If you did that then wouldn't you be overspinning the alternator, water pump and AC?
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06-20-2020, 01:04 PM | #894 |
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Harrop estimated the alternator would be fine.
Oil and Water are things that will just have to be checked when running. I'm well over built in that area though from past turbo experiences. Knock on wood. I've already have a quote for a custom pulley setup. The quote hits right at 11k with 6-8months of downtime in their shop. Custom rebalanced crank, dual crank pulley, a stand-alone idler/free floating tensioner, and a pair of custom supercharger pulleys to moving the Supercharger over to it's own 8-rib drive belt. Needless to say that route isn't going to happen.
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06-20-2020, 02:40 PM | #895 |
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06-20-2020, 03:28 PM | #896 |
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I have brought this up before, but I was thinking of adding a coolant surge tank to the system like the Edelbrock kit, specifically, I want to buy the tank from their kit. Your thoughts?
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