How many more cc's of fuel will it take? - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 249 (permalink) Old 10-31-2008, 10:35 PM Thread Starter
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How many more cc's of fuel will it take?

Last hook out the engine held 34-3500 rpm's on a pretty good track. Let's just say 3400 with the new tune. The injectors are still 235cc hybrids with 200% nozzles and oil mods. I want to see what it will take to get to 35-3700 on a very tight track as NADM usually has. The data log showed 3.5x ms pw can be had at 4200. It may hold to a higher rpm, that's where I lifted. The standard seems to be 350cc's that everyone is going to. IMHO I think it will take less to get to where I want to be. I may be wrong but. What do you think, 280-300cc's?

Kevin

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post #2 of 249 (permalink) Old 10-31-2008, 11:53 PM
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Re: How many more cc's of fuel will it take?

The most you can get out of the IDM is 3ms at 4000 rpms no matter what the datalog tells you... actually you need to actually be able to empty all of your fuel in probably 2ms or faster (actual spray time) to actually do any good at that rpm.

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If you have nozzles that were Extrude honed over and over and over again. It will look like a porn stars ass.hole where the pintle is supposed to seal.
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post #3 of 249 (permalink) Old 11-01-2008, 12:16 AM Thread Starter
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Re: How many more cc's of fuel will it take?

I appreciate your input. I know what everyone said could or can be done with factory electronics. Buy the tune from Jody then let me know what you think.

The post is to compare where I'm at with 235cc's and what it will take to get to where I want to be.

Kevin

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post #4 of 249 (permalink) Old 11-01-2008, 12:18 AM
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Re: How many more cc's of fuel will it take?

300cc

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post #5 of 249 (permalink) Old 11-01-2008, 12:24 AM Thread Starter
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Re: How many more cc's of fuel will it take?

Joe do you think your over fueled?

Kevin

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post #6 of 249 (permalink) Old 11-01-2008, 12:45 AM
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Re: How many more cc's of fuel will it take?

IF you can pull off 3.5ms at 4200, (which is past what the IDM can actually interpret... but I will ignore that at the moment.....) You are injecting fuel at around 88 degrees of crankshaft rotation. How much of that fuel is actually being of use to you? What kind of timing are you running to make power with that PW length at that RPM?

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post #7 of 249 (permalink) Old 11-01-2008, 12:52 AM
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Re: How many more cc's of fuel will it take?

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Originally Posted by mech2161 View Post
Joe do you think your over fueled?
depends on what turbo i go with currently a lil but its fun!

Joe "House" Kupferschmid
1995 F250 7.3 2.6 zf6 Puller
2006 Chevy 3500 CC DRW LBZ, Tow Slut
SOLD:2000 F350 harvester of sorrow

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post #8 of 249 (permalink) Old 11-01-2008, 12:53 AM
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Re: How many more cc's of fuel will it take?

Quote:
Originally Posted by mech2161 View Post
Last hook out the engine held 34-3500 rpm's on a pretty good track. Let's just say 3400 with the new tune. The injectors are still 235cc hybrids with 200% nozzles and oil mods. I want to see what it will take to get to 35-3700 on a very tight track as NADM usually has. The data log showed 3.5x ms pw can be had at 4200. It may hold to a higher rpm, that's where I lifted. The standard seems to be 350cc's that everyone is going to. IMHO I think it will take less to get to where I want to be. I may be wrong but. What do you think, 280-300cc's?
Soo your looking for about 200 more rpm's which needs 3.5ms. Current injectors are 235cc.

(235cc x 3.5ms) / 200rpms = 4.1125
Convert miliseconds/revs per minute buy multiplying by 60 = 246.75cc's

Pretty simple.

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post #9 of 249 (permalink) Old 11-01-2008, 12:54 AM Thread Starter
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Re: How many more cc's of fuel will it take?

Jason I know Jody added timing. How much I'm not sure. Before we started you could watch it dropping pw to 3600 where it would go to 0. When it went to 4500 we had fuel pulled out so it wasn't so violent when it cut out. We kept adding till I wussed out with the amount of road we had to work with. At that point it logged a smooth 4200 rpm's at 3.5x ms. I'll check with Jody on timing.

Kevin

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post #10 of 249 (permalink) Old 11-01-2008, 12:57 AM Thread Starter
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Re: How many more cc's of fuel will it take?

Quote:
Originally Posted by imelmo View Post
Soo your looking for about 200 more rpm's which needs 3.5ms. Current injectors are 235cc.

(235cc x 3.5ms) / 200rpms = 4.1125
Convert miliseconds/revs per minute buy multiplying by 60 = 246.75cc's

Pretty simple.
Not for me. Wouldn't that not take added load into consideration?

Kevin

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