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How big are the internal pump passages? Unless running some monster ,"race style",the internal passages are rather small.
If you were asking me the pump has a connection to push on a 1/2" hose (-8) that is part of the housing that can not be changed.
the walbor 450 e85 pump i selected/oredered has an 10mm or 3/8" inlet outlet ID according to there site. i don't have it yet but should this week to view personally. now ....the 130lb inj's i purchased for e85 require a bit more flow than pump gas or race fuel. hence the larger pump but if i reduced that down to 5/16" to the motor i would reduce flow a bit. how much....i would have to test that and don't have the equipment but no matter what if the outlet is 3/8" i will step up to 1/2" from there to the motor.Many people do but is not needed.It won't hurt anything but is truly not needed. it's an in tank pump. now bo ....scott smiths friend, he was having fueling issues and stepped up from 3/8" to 1/2" and problem solved. the other issue that i do not know if it was fixed at the same time is that he was using to filters. a 60 micron and a 40 micron pre and post pump. small bodied aem filters. if he canged those at the same time that could've been his restriction point.Bingo and too many transition fittings also restrict flow. MANY fittings have much smaller passages as well. Many times it's the AN fittings restricting flow and not line size but larger hose size is necessary to allow the fitting ID to be at least 3/8" which is plenty.Choose your AN fittings carefully and large lines aren't really needed at all. i don't think he did though. i know he has changed them to a single 10 micron post filter like i and enemy run from fast systems. speedway sells them locally. 4 models, 250 - 300 gph flow rate at 10 and 4 micron ratings, screw on filters the size of an oil filter similar to one on the gm 3.8 series II engines or gm 5.7 v8 engine.
What I was getting at was most people today are using walbro or similar pumps. They may have larger connections but the inlet and outlet internal passages are actually pretty small. In the old days of low pressure carburetor systems we needed 1/2 or even larger to supply an adequate fuel supply. With EFI and much higher pressures ,the line sizes can and frequently are,much smaller. The days of needing huge pumps and lines are gone. Still ,many people will run large lines unnecessarily. I was not saying you were.
here is what the little engine, has in her, on the dyno. the car sure runs a lot better with the bigger injectors. have to put it in the sand to see if its as much as the old VW had. BOY,,,, CAN I SEE A 2.5 IN THE FUTURE. This one will work for some ride time.
The cool thing it going to a 2.5 is an easy swap (as long as the trans can handle the power)
You will love the pull of the 2.0 when the turbo kicks in. I was looking at the graph, and thought it said 120 mph, wow. But it was kph. Are you heading down to lil Sahara in early May with us?
did he give you a print out you can post that graphs rpm?i hope to make an early may trip but that will be a last min trip for me. my daughter get married this weekend and the rail is back on it's wheels but motor is still not together. and won't be able to work on it this weekend ...not with out a lot of hell to pay anyway lol
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Topic: OUT WITH THE OLD VW. IN WITH THE SUBARU (Read 49698 times)
