4an Vs. 6an
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From: From Ohio now in that state up north
4an Vs. 6an I searched this but there was no clear cut awnswer. On a dp 4 noid set up I want to know what a 4 an line is good to on both the fuel(55psi) and n2o(950psi) side. Would it be ok on a 300-325 shot or would i need 6an lines.
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From: From Ohio now in that state up north
Well main feed line is between 16'-20' for n20 plus the maby 1 foot to each noid then probably just a few feet for the fuel but lets say 5 feet cause that the lenght you get with a dedicated fuel cell
At that fuel pressure, I think -4AN would be fine on the fuel side.
For nitrous, I would really step up to -6. I've personally seen good gains from swapping to -4 to -6 at even 200-250 power levels.
For nitrous, I would really step up to -6. I've personally seen good gains from swapping to -4 to -6 at even 200-250 power levels.
Launching!
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From: Huntington Beach CA
Yeah at that length the -4 will be a restriction. Not sure where the 40hp thing on -4 started but anything over 250-300 should use a -6. This is assumeing the stantard feed line length of 12-14' and up. On the fuel side at that pressure you should be fine but going bigger wouldn't hurt either and would allow you to go bigger in the future. If Ihad to buy all the parts from scratch I would go with -6 all the way around.
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I stepped up from a -4AN to -6AN this past weekend and burnt stuff. Same exact everything, except line. ?? I tried going 10psi highier on fuel side half step colder plug, and tried taking ALOT more timing. Nothing seemed to help. Head gasket finally blew.
I'm gonna stick it out with the bigger line, but just a few words of wisdom.
I'm gonna stick it out with the bigger line, but just a few words of wisdom.
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Joined: May 2006
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From: Huntington Beach CA
Originally Posted by stroked30th
I stepped up from a -4AN to -6AN this past weekend and burnt stuff. Same exact everything, except line. ?? I tried going 10psi highier on fuel side half step colder plug, and tried taking ALOT more timing. Nothing seemed to help. Head gasket finally blew.
I'm gonna stick it out with the bigger line, but just a few words of wisdom.
I'm gonna stick it out with the bigger line, but just a few words of wisdom.
Well, lets see, in the past few years, there have been quite a few ppl pushing 350+ shots on 4AN line, and most considered the max capacity to be 400. Me personally, I'll step mine up 6AN just to avoid having to do it all over again later anyway. But for guys staying below 300, 4AN should be more than enough.
Originally Posted by srsnow
How much nitrous were you running?
My -4AN did supply well at the 310 power level, but MPH seemed to drop off or stay the same at anything more than 310. ??
I'm not saying -4AN will not work with more than 310, just saying for ME it did not seem to work; and the switch to -6AN seemed to have made a deifference, but I was not ready or well equipped for the change.
Originally Posted by srsnow
Yeah at that length the -4 will be a restriction. Not sure where the 40hp thing on -4 started but anything over 250-300 should use a -6. This is assumeing the stantard feed line length of 12-14' and up. On the fuel side at that pressure you should be fine but going bigger wouldn't hurt either and would allow you to go bigger in the future. If Ihad to buy all the parts from scratch I would go with -6 all the way around.
Robert
Originally Posted by NOTFAST
Care to explain... 
Launching!
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From: Huntington Beach CA
Originally Posted by Robert56
The 400hp on a 4an is under ideal conditions, meaning, an absolute straight shot and no 90*'s or other restrictions like teeing to dual noid set-ups. On this set-up above I would opt for the 6an if you can.
Robert
Robert
