Nitros, High compression, direct port?
#1
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Nitrous, High compression, direct port?
hey people,
ive recently build my motor, just waiting til it gets tuned. (ls/vtec, itr pistons, toda cams, skunk2 valvetrain, rc 310in, walbro 255 fuel pump, engine fully rebult, arp bolts,studs,new fuel pump etc)
i have a wet nitrous kit that i would like to use,
though i have a few queries,
First of all my compression is around 12.5, clearances are very tite.
second this is i havent really got the money to go direct port, though i understand it is alot better. So i will be runnin a WET n kit/
Im wanting to run 150 shot, and also planning to get a set of colder plugs. though im not quite sure how safe this will be... ?
Im going to richen the a/f ratio and also retard the timing when i use Nitrous, and have a seperate map but still not sure how safe this will be?
and how safe will it be if i dont retard timing ?
I will be controlling the nitrous with a progressive controller.
so if u run this how effective will it be ?
Anyone shed some light on this,
ive searched in the FI forum, but there isnt much help there as they are forced induction.
thanks
ive recently build my motor, just waiting til it gets tuned. (ls/vtec, itr pistons, toda cams, skunk2 valvetrain, rc 310in, walbro 255 fuel pump, engine fully rebult, arp bolts,studs,new fuel pump etc)
i have a wet nitrous kit that i would like to use,
though i have a few queries,
First of all my compression is around 12.5, clearances are very tite.
second this is i havent really got the money to go direct port, though i understand it is alot better. So i will be runnin a WET n kit/
Im wanting to run 150 shot, and also planning to get a set of colder plugs. though im not quite sure how safe this will be... ?
Im going to richen the a/f ratio and also retard the timing when i use Nitrous, and have a seperate map but still not sure how safe this will be?
and how safe will it be if i dont retard timing ?
I will be controlling the nitrous with a progressive controller.
so if u run this how effective will it be ?
Anyone shed some light on this,
ive searched in the FI forum, but there isnt much help there as they are forced induction.
thanks
#3
Honda-Tech Member
A 150 shot will probably scatter you motor. Its just to much nitrous, especially for you compression. Pulling time might help a little, but I would stick with a much smaller shot. In the 50-75 area. Most nitrous cars also run an exhaust cam with a longer duration to help dispense all that extra O2 that the nitrous releases durinig combustion.
#4
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Re: (Reedy)
Its not too much nitrous for your compression, not by a long shot. You will need at least an 8 or 9 (ngk equivalent) cold plug--and no pump gas. That shouldn't be a problem with 110+ octane. I would NOT run that on pump gas. You say your clearances are "tight"? Bearings, piston to wall? HOw tight? I see you are running ITR pistons, I assume ITR rods? If that is the case I wouldn't do it. Get a low silicon forged piston and run it a little "looser" than you would for a straight N/A application. Otherwise you are playing with fire.
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