01-09-2012, 01:35 AM | #31 | |
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The HS looks great! Glad you found a use for it!
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Darwin 1988 951S: 944 Enhancement 3.1L//SFR Exhaust//Vitesse Turbo//TecGT// Quote:
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01-09-2012, 02:23 AM | #32 | |
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As a reference point for your injectors, I'm hitting 96-98% duty cycle out my 100 lb/hr injectors at 1.5 Bar on my 2.5L with GT3076R and E85. I'm sure that you'll top out your injectors soon enough given the components in your build. Good luck tuning!
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Vic WWW.PAUERTUNING.COM '89 951 Guards Red - 2.5L Vi-PEC V44, GT3076R '89 951 Stone Grey - 3.0L 16V Turbo Project, V88 '86 951 Sapphire Blue - 2.8L Vi-PEC V44, GT30R '89 944S2 Black - Stock Last edited by Pauerman; 01-09-2012 at 06:54 AM. |
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01-09-2012, 06:45 AM | #33 |
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Great work there.
I wouldn't bother with a 4" intake. I too have a 4" compressor cover but I use a 4"->3" silicone reducer to fit 3" ducting ahead of the turbo. I'm not sure the resulting restriction is significant enough to hinder performance. |
01-09-2012, 05:58 PM | #34 |
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If you accept George D's 800 cfm, I think the velocity of the air in a 4" pipe would be about 26 mph and going to 3" ramps you up to 46 mph. My math may be very wrong. I'm doing this in my head and on the iPhone. But the ratio is going to be 4 ^ 2 versus 3 ^ 2.
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1986 944 GTR with 928 engine 1987 951 in fewer pieces, 3.0 ltr build. CPR 968 wing V3 splitter 2003 Ruf 3600S pretty much stock. |
01-09-2012, 06:01 PM | #35 | |
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So what would you think, 160 lb / hr for a 3 liter on E85 at 1.5 bar boost? And would the 044 pump be enough? I think I start with pump gas, but even with only 2 stations in town E85 sounds tempting.
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1986 944 GTR with 928 engine 1987 951 in fewer pieces, 3.0 ltr build. CPR 968 wing V3 splitter 2003 Ruf 3600S pretty much stock. |
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01-09-2012, 06:06 PM | #36 | |
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And thanks everyone for your positive comments.
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1986 944 GTR with 928 engine 1987 951 in fewer pieces, 3.0 ltr build. CPR 968 wing V3 splitter 2003 Ruf 3600S pretty much stock. |
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01-09-2012, 06:45 PM | #37 |
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01-10-2012, 08:46 AM | #38 | |
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Beauty of the power wires I sent Rick is that adding the aditional power lead for the pump taps right into the terminal strip on the power side, or directly to a terminal on the kill switch.. isolated from the battery via a kill switch and without the switch in the on position the fuel pump will NEVER turn on! Rick, let me know if you want a setup ready to install as described, as I believe I have everything on hand to accomplish it.. and can make it plug and play to the terminal strip! (I also have an 044 I will be using, although my batteries will be in the hatch area so my specific wiring will be a bit different!) |
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01-10-2012, 10:29 AM | #39 | |
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From there on, I understand that reducing intake air velocity to the compressor inlet equates to increasing the restriction in the compressor inlet and increasing the resulting (and normally expected) vacuum, thus increasing axial load on the turbo shaft. By which % I couldn't tell but whether a 4" or a 3" intake is used, I feel that the restriction of the air filter ahead will always have a more significant impact to intake air restriction than the diameter of the ducting to the compressor inlet. Theoretically, the free-er the intake, the faster the turbo spool, but I doubt this could be quantified with anything but a PC log. Or maybe I'm missing something? Last edited by Thom; 01-10-2012 at 10:49 AM. |
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01-10-2012, 07:13 PM | #40 |
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I would think that you're getting pretty close to needing a 2nd pump. I'm not sure what the tricky part in setting up the Fuel Flex sensor is. I'll try and find out from the guys putting it in my car if it's of any use.
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01-11-2012, 03:19 AM | #41 | |
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I've been running the walbro 392 pump for a few years now and it has kept up with the additional fuel flow needed for e85. I run 11.8-12.0 and so far my AFR is rock-solid reliable up to 1.5 bar and I can make it run richer if i needed to at this boost. As an alternative to the 044, it's been a good pump for my needs.
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01-11-2012, 04:34 PM | #42 | |
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Intake accomplished (almost)
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Okay I need to trim the foot long silicone boot, but I need to leave at least 5" so that the intake can't touch the positive connection on the alternator. And then a filter is needed. KN filter 4"flange opening , 9" X 5-3/4"Base, 7" X 4-1/2"Top, 4"High I think this will be adequate.
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01-11-2012, 10:57 PM | #43 | ||
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I have John's battery cables and cut-off switch in.
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01-12-2012, 11:05 AM | #44 | |
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And no worries on the suplimental pump wiring... I have 1000 feet of 6 gauge, and probably close to 500 feet of 8 gauge primary wire on hand, along with all teh bells and whistles to set this up... I doubt I am going to have a run on the wire any time soon! And just like the battery cables, I am sticking with the SGX cable... this stuff is proving to be quite versitile... and tough as nails! |
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02-14-2012, 10:48 PM | #45 |
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You can have headlights and a 4" intake
I told you it could be done. 50mm Hella projectors DOT approved and all. A little finish work to go. But I like the light and a true 4" intake.
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1986 944 GTR with 928 engine 1987 951 in fewer pieces, 3.0 ltr build. CPR 968 wing V3 splitter 2003 Ruf 3600S pretty much stock. |
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