01-22-2021, 06:22 PM | #1065 | |
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Harrop has a custom setup on their car. I don't know if this is done to clear a larger TB and/or to run a 8 tooth belt instead of the 6 tooth belt the kit comes with and/or to run a larger crank pulley to get more boost. It is hard to tell.
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01-22-2021, 07:51 PM | #1066 |
Steve Bodalenko
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Just want to here what the driving experience with the DW700”s V ID1050’s is. Might be hard to find someone who has actually had both in their cars. The drivability at DD speeds and conditions v performance gains I guess or basically does your car run better since/if you’ve changed the 700cc to 1050 injectors and nothing else apart from an obvious retune to suit. What are and where are the positives or negatives from the change?
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01-22-2021, 08:08 PM | #1067 | |
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Typically you get better atomization and short pulse width control. Real world: more power, more mpg, smoother throttle response/control under low load (street driving) scenarios. |
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01-22-2021, 09:06 PM | #1068 | |
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We know objectively that some people will overstate the benefit of modz. It can be a conscious thing, or it can be a subconscious placebo effect. There is a desire to rationalize modz and expenses. If you settle on the IDs then dyno with the DW700s and then dyno with some ID1050s, and post the results. Do a road trip before and after, and post the mpg before and after. I'm curious if the theory pans out to anything objectively meaningful.
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01-22-2021, 10:41 PM | #1069 |
Steve Bodalenko
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Sorry was that using the DW700cc or the ID1050?
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01-22-2021, 10:51 PM | #1070 |
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01-22-2021, 10:52 PM | #1071 | |
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01-22-2021, 10:53 PM | #1072 | |
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They’ve obviously, or at least you’d hope they have, tried both sizes and are confident the DW are up to the job. My post was just to see if anyone had some first hand, real world experience with both in a Harrop setup. Mike seems to have come the closest so far.. |
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01-23-2021, 12:16 AM | #1073 | |
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It is also worth noting that if the port injectors in each setup were tuned for the same quantity then the IDs will need to have a shorter pulse width than the DWs, so they would need more control at short pulse widths in order to match the DWs, yet you say they do this and more, surpassing the DWs. Impressive, yet still unclear if there is any real world difference. Wish we had some data beyond bench tests.
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01-24-2021, 12:49 PM | #1074 |
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Looking into alternative engines for my build now. I'm about sick of working with IAG. It's been almost a year and no updates. I've gotten word about D-Sport offering a 2.25l built Mahle/Manley/LA Sleeved FA20 package. They cracked 500whp with the HKS supercharger. Might be an option. I'm not going another year without the car.
- - @kg17 The Grams 72mm throttle body will not fit. While it will work with the intake it had some extra material along the top (top referencing the top of the TB when the unit is installed to a OEM intake manifold equipped car.) When the TB is installed onto the s/c it need to be clocked 90 degrees counterclockwise and that extra material will contact the blower's snout. I'm not sure if you can machine down the throttle body to get it to clear. You might be better off looking into BLOX's offering which are 68mm and 70mm ported throttle bodies with only the billet housing being replaced. Grams 72mm vs OEM (note the extra material on the right hand side) Blox 70mm
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01-24-2021, 08:59 PM | #1075 |
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It would be nice if the FA24F shortblock was a bolt up affair, but it isn't. Have you considered sourcing a FA24D block from Toyobaru then getting it built. FA24F pistons with FA20D aftermarket rods should work. That is what I would consider if I do a build after nursing school, but I'll likely put off anything until much later unless something blows.
If someone was dead set on getting the Grams TB in then they could probably do a spacer. What do you think?
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01-25-2021, 12:49 AM | #1076 |
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The curtent ascent block would need a belhousing adapter for the trans and the starter which mirror the fa20dit block's mounting locations. I'm not sure if Subaru's direct injection is interchangable with the d4s parts either.
Worse case I still have hks 2.1 low comp parts on the shelf too... The grams tb includes spacers. Some shops show 2 different (in thicknesses) plastic looking spacers included with it. You would have to extend past the pulley which might then mess with your sensors be it iac or maf.
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01-25-2021, 01:46 AM | #1077 |
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That’s why I would just use a FA24D block, but at 13.5:1, I think I would do a low compression build and use the FA24F lower compression pistons with some forged aftermarket rods for the FA20/24D.
Why would the sensors be affected?
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01-25-2021, 12:34 PM | #1078 |
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