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05-05-2017, 10:37 AM
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#43 |
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Drives: 2016 1LT RS Camaro; 72 Chevelle Join Date: Apr 2008
Location: Central Point, OR
Posts: 5,688
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The dude is active this morning, and already responded to my reply with some info I had questioned...
I believed the stock pressure on the LTG HPFP was 200bar, where is the XDI-35 is 180bar. He confirmed that my theory of the stock pump was indeed 200bar, but says the 20bar less would not hurt anything. Where the XDI trumps the stock pump is that is supplys 35% more volume. He seems to think the injectors will be maxed out before the XDI-35 is... But I calculate the injectors are good to 625 hp on pump gas @ 80% duty cycle... I wonder where the stock HPFP will run out? |
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05-05-2017, 10:51 AM
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#44 | |
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Drives: 2016 1LT RS Camaro; 72 Chevelle Join Date: Apr 2008
Location: Central Point, OR
Posts: 5,688
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05-05-2017, 11:43 AM
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#45 | |
 
Drives: 2016 Camaro LTG Join Date: Jul 2016
Location: SE Michigan
Posts: 316
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Quote:
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2016 LTG Camaro in Hyper Blue with MRT V3 Catback and Brembo SS Brakes.
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05-05-2017, 11:52 AM
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#46 | |
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Drives: 2016 1LT RS Camaro; 72 Chevelle Join Date: Apr 2008
Location: Central Point, OR
Posts: 5,688
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Quote:
It does sound great... But I already pulled it off and my initial inspection tells me that this pump does not come apart. Everything seems to be welded together...   When I get a chance I will measure the throw on it and then compare it to the cam lobe to see if anything is being left on the table... There isn't any large amount of "preload" like I was hoping for originally for my fuel lobe regrind idea, BUT if there is enough travel for the follower in the bore, and there is stoke left on the table, the regrind idea is still viable and you would just shim the roller to take up the extra space in the travel to get the extra stroke taken out of the base circle on the regrind Sent from my iPhone using Tapatalk |
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05-05-2017, 11:57 AM
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#47 |
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Drives: 2016 Camaro LTG Join Date: Jul 2016
Location: SE Michigan
Posts: 316
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Is there a clip hiding on the piston under the spring retainer? It will probably disassemble that way.
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2016 LTG Camaro in Hyper Blue with MRT V3 Catback and Brembo SS Brakes.
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05-05-2017, 12:00 PM
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#48 |
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Drives: 2016 Camaro LTG Join Date: Jul 2016
Location: SE Michigan
Posts: 316
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Like under the washer....
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2016 LTG Camaro in Hyper Blue with MRT V3 Catback and Brembo SS Brakes.
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05-05-2017, 12:02 PM
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#49 |
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Drives: 2016 1LT RS Camaro; 72 Chevelle Join Date: Apr 2008
Location: Central Point, OR
Posts: 5,688
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Doesn't appear to be but I'm sure there must be. I'll probably have to make some special damn tool to get it apart.
Sent from my iPhone using Tapatalk |
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05-05-2017, 12:05 PM
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#50 | |
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Drives: 2016 Camaro LTG Join Date: Jul 2016
Location: SE Michigan
Posts: 316
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Quote:
__________________
2016 LTG Camaro in Hyper Blue with MRT V3 Catback and Brembo SS Brakes.
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05-05-2017, 12:19 PM
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#51 |
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Drives: 2016 1LT RS Camaro; 72 Chevelle Join Date: Apr 2008
Location: Central Point, OR
Posts: 5,688
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Yeah, that's what I found from my research earlier this morning. I'm wondering if I get the spring off if the piston even comes out still
Sent from my iPhone using Tapatalk |
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05-05-2017, 12:22 PM
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#52 | |
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Drives: 2016 Camaro LTG Join Date: Jul 2016
Location: SE Michigan
Posts: 316
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Quote:
__________________
2016 LTG Camaro in Hyper Blue with MRT V3 Catback and Brembo SS Brakes.
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05-05-2017, 03:55 PM
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#53 |
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Drives: 2016 1LT RS Camaro; 72 Chevelle Join Date: Apr 2008
Location: Central Point, OR
Posts: 5,688
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Doesn't seem to. I put it in a arbor press, pushing only on what would appear to be "the retainer" (I was hoping it was like a valve spring), it's obviously not, or there is something I'm not seeing. So I'm guessing it's some
Magical sealed unit as I can not find a way it comes apart. I did measure the stroke length, I came up with .300" I will throw a dial inductor on the fuel lobe and see what that measures. Sent from my iPhone using Tapatalk |
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05-05-2017, 04:35 PM
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#54 |
      
Drives: 2017 Camaro 2.0T RS Join Date: Jul 2016
Location: Ontario
Posts: 1,827
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As Delivered: 2017 Mosaic Black 1LT RS 2.0T | M6 | HD brake and cooling | Bose & 8"screen | Front lip extension | Blade spolier | Black bowties | Painted splash guards
Installed Mods: 25% Window tint | Headlight, side marker and third brake light Phastek tint kit | GM black taillights with Gen5diy LED harness and bulbs | LED license plate bulbs | Gorilla lug nuts, black | GM 'performance' center caps | RS and sheild badges removed |
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05-05-2017, 05:24 PM
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#55 | |
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Drives: 2017 Camaro; 2017 Acadia Denali Join Date: Jun 2016
Location: Chicago, IL/Williams Bay WI
Posts: 1,022
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05-05-2017, 06:18 PM
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#56 | |
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Drives: 2016 1LT RS Camaro; 72 Chevelle Join Date: Apr 2008
Location: Central Point, OR
Posts: 5,688
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Quote:
So I measured the fuel pump lobe, I forgot ZZP had the info on their site already, they say it's .157", I measured it at .160"... Pretty close. They're lobe has .200" stroke, still leaving about .100" of stroke available in the HPFP. Might be able to get it to .225 or .250" and still be safe. Wouldn't want to go the full .300" and risk putting the HPFP spring in a coil bind situation at high RPMS. So, back to the fuel lobe regrind drawing board, it's a viable answer. |
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