Just ordered my set-up! - Honda Prelude Forum

DOHCVTEC190 · 06-23-2005, 09:23 AM

I just placed my order for some nitrous goodies.

1. Nitrous Express Import Stage 1 EFI Kit (20923-10)

2. Nitrous Express GenX-2 Accessory Kit

3. MSD RPM Activated Switch, LED Push Button Adjustment (8969)

4. Set of BKR7E Spark Plugs

Does this look good to you guys? Also, I was told by a friend that the install is pretty basic and the only tough part is modifying the WOT switch bracket to fit. Anyone have details on the bracket for a prelude?

NXLude · 06-23-2005, 02:46 PM

Setup looks good....might consider a fuel pump though....HT has some sponsors selling them for 79 bucks.....

The WOT switch took me a while to get figured out, but I did it, Ill try to post some pics of mine up if I can find a good one....

DOHCVTEC190 · 06-23-2005, 02:56 PM

would i need the fuel pump? and for what reason?

NXLude · 06-23-2005, 07:43 PM

Its good cheap insurance, and youd need it to make sure your getting enough juice.

golfluder01 · 06-23-2005, 08:06 PM

ya, not enough fuel and too much nitrous is a bad mixture.

DOHCVTEC190 · 06-23-2005, 08:12 PM

I also ordered teh GenX-2 Kit so it has the fuel pressure safety switch? Would that not prevent any fuel starvation? And if I did order a pump (I might a little later) which one would I order? Walbro 255 lph? or the other 255?

NXLude · 06-23-2005, 08:56 PM

either walbro is fine, but since youve spent 1G already you should buy the pump, its under $100 and it will make sure that no matter what, you got enough gas. That 255 will support a hell of alot of power

DOHCVTEC190 · 06-23-2005, 09:05 PM

whats the difference between the 255 and the 255 hp??

DOHCVTEC190 · 06-23-2005, 11:48 PM

okay took ur advice and ordered the 255lph HP pump...probably going to have to retune my car...i think laughin2.2 make a post and said that the higher volume fuel pump upped his fuel pressure 3-4psi. that'll make me run a little rich and lose power on my current tune.

NXLude · 06-24-2005, 03:16 PM

Buy a guage. My pump didnt change my fp at all. (Aka fuel pressure REGULATOR)

DOHCVTEC190 · 06-24-2005, 03:30 PM

Quote:

Originally Posted by NXLude

Buy a guage. My pump didnt change my fp at all. (Aka fuel pressure REGULATOR)

nxlude, do you have aim or anything??

NXLude · 06-24-2005, 09:47 PM

MSN/hotmail messenger its hwt_jnb@hotmail

DOHCVTEC190 · 06-24-2005, 09:51 PM

Okay, I splurged and went ahead and got the MSD Digital 6+ and Blaster SS Coil too. I should be set now hopefully.

Any details on bottle mounting and the WOT Switch bracket?

NXLude · 06-24-2005, 10:04 PM

Bottle, put a brace across the back of the trunk, under the liner, to support the weight. (I used a little piect ot 1X6 wood) Then mount the bottle with the valve facint the nose of the car. As far as the WOT switch, there are few ways to mount it as to where the switch will activate properly. I mounted mine kinda above the TB with the switch facing down. Youll have to do some trial and error with it. But it shouldnt be too hard.

DOHCVTEC190 · 07-06-2005, 12:08 PM

UPDATE

Made some progress on the install of some of my parts.

I spluged and also bought the MSD Digital 6+ and Blaster SS coil. I got that installed a few days ago. My 2-step is just wired to a regular switch. Tried using this clutch set-up I found but I couldn't get it to work and burnt out my clutch switch.

I have the Walbro 255lph HP pump sitting right in front of me all set up and ready to go in. It's just too freakin' hot outside to do anything right now (no garage). As soon as that goes in, I'm going to street tune my car with my Zeitronix wideband and Uberdata.

THEN, the NX will go in. I have everything set up kind of on the NX kit. The purge and n2o noids are connected. Bottle is set up with the heater and stuff. I just have to mount it all. Run the lines and wire it.

I'm going to mount the bottle in the back right corner of my trunk right in front of the tail light. I'm going to use some metal self-tapping screws and washers. Going to try to do the noids in the rain gutter thing (which requires drilling the firewall right?).

Then, she'll be done.

So, for a 50shot I just need 1 step colder plugs? I got those in right now. For 75shot? The plugs and retard 2 degrees?

Anyone know how an Exedy Organic Race clutch does with nitrous? I searched and laughin2.2 said it sucks with 75shot which swayed me to stay with the 50shot.

Nocturn · 07-06-2005, 02:54 PM

if you are still unsure about how to mount the wot switch, check out my thread, it is the one right above this one that says 56k danger i have good pics of mine

DOHCVTEC190 · 07-06-2005, 03:42 PM

Oh yes, I saw your thread. I saved the pix already. Those are perfect. I ordered the brackets like yours already.

DOHCVTEC190 · 07-08-2005, 12:26 AM

UPDATE:

Just got in from finishing up my street tuning. Installed the Walbro 255lph HP fuel pump yesterday. That was such a PITA. I had to remove a lot of crap in the back (seats, center speaker, and then the back brace frame part) to pull the pump out. And then it was a PITA putting the new one in.

Anyways, yeah got that done and street tuned today. I'm using Uberdata 1.66 BTW. I was partialy tuned before (not with the ignition or fuel pump though) and we found the ideal VTEC engagement already (4400RPMs showed no dip just smooth plot). So, I just kept using that and tuned the AF ratio on my wideband. I got the Zeitronix unit. It's pretty nice and easy to use. I used Import Builders tuning guide found here: http://www.importbuilders.com/tuning.html to tune. My part thottle was already basically done. I guess I found a good basemap thanks to blundar on the uberdata forums. AF sticks around 14.7 all the way up to 50% throttle and then goes to 13.5 until redline. The tune is kind of rough ranges from 13.4-13.8. I may fine tune it even more later. There is one dip that goes to 13.0, but I can't seem to get rid of it. It's in between RPM points found in Uberdata.

Here's my datalog:

Now, for the nitrous install!!!

bvprelude · 07-08-2005, 04:01 PM

why do you have your a/f ratio tuned so lean?!?! 13.5:1 isn't that alittle lean even without spray? I have mine tuned to 12.7:1

DOHCVTEC190 · 07-08-2005, 04:07 PM

I tuned according to the Import Builder's guide here: http://www.importbuilders.com/tuning.html

Quote:

At full throttle, we are searching for around 13.5:1 air/fuel ratio for a naturally aspirated engine. Turbo, we are seeking from 12.0-12.5. Supercharger, you would want it around 12.0 on the richer side of the spectrum because it generates so much heat. Anyway, 13.5 or so for all motor, so you give it gas at 2000 and see the indicator that's datalogging jump up to column 9-10 pretty fast, and you notice your at 15:1 air/fuel ratio as soon as you floored it to when you let off at about 3000 RPM.

I thought I've read 13-13.5 is good for NA and 12-12.5 for FI. Either way I'm still going to fine tune it tonight and try to get everything as close to 13.5 as possible.