Big Savings on IDI Parts this Week!

Thewespaul

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Hey Oilburners! Wanted to let everyone know that today through friday all products on the website are 10% off using the discount code "Classic" https://classicdieseldesigns.com/

I was ordering some parts online for some projects here and found that summit was having a lot of common IDI parts on sale today, not affiliated in any way just sharing some discounts I found myself ;Sweet

https://www.summitracing.com/search...w=SKU&sortby=Default&sortorder=Ascending&ar=1

https://www.summitracing.com/search...w=SKU&sortby=Default&sortorder=Ascending&ar=1

https://www.summitracing.com/search...w=SKU&sortby=Default&sortorder=Ascending&ar=1

https://www.summitracing.com/search...w=SKU&sortby=Default&sortorder=Ascending&ar=1

https://www.summitracing.com/search...iew=SKU&sortby=Default&sortorder=Default&ar=1
 

laserjock

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So question Wes. Do you run a regulator with that Holley red? At 7 psi seems unnecessary.
 

Thewespaul

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7 psi isn’t out of range of what I would run on a db2 especially a hopped up spec pump, but I really like to see some sort of a regulator with a e pump conversion just so you’re holding that same pressure from idle to wot so you’re not shifting the timing from where it is set. Last Saturday a customer picked up a truck that I had installed and fine tuned one of my 110 pumps. After installing the bigger pump the truck was having some severe fuel pressure issues, and would actually stall out on the side of the road and have to be rebled to start again after heavy throttle. The truck has a R&D fuel setup with the dual filters and a Holley red with no regulator. That fuel pump should be able to supply enough volume for this 110 so I went through the lines looking for a blockage and found this at the sending unit
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I installed a sump to cure the pickup issues, gain easy access to the fuel fittings and to have a drain plug if the tank ever needs servicing again. No more supply issues, and after dropping the timing down a few degrees to account for the higher fuel pressure the truck drove fantastic and had very controllable egts, with numbers no higher than 1150* pulling an 8k lbs trailer and a 9500 lbs truck up a hill at highway speeds with ease. Without a regulator, I would notice that when slowly increasing throttle there was a noticeable point when the engines timing would audibly change, most likely when the throttle is cracked enough to apply enough force on the advance piston spring to unseal that port, which instantly increases the volume demand from the transfer pump, so the transfer pump regulator springs wide open from just barely using any fuel, which results in an inlet pressure change, which is the opposing pressure from the fluid resisting flow from the transfer pressure regulator.

With a regulator, you don’t have that as a factor effecting your timing, so you can just manually adjust it with the pumps mechanically set timing, that way you have an adjustable setting controlling how the engine performs, instead of the condition of the fuel or the mileage on your filters dictating it.
 

Oldiron

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Can a regulator be installed into the filter head and bleed off into the fuel return system? I have eliminated the return from the filter head to the return and was thinking I could install it there with a gauge.
 

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