Black Jack: Fixing torque steer

Yours wore them better, I'd say, but Black Jack is tryin'

Nitrous install underway
The setbacks -- all due to buying from the used market :
- Bought 1st MSD Digital 6 Plus from FB marketplace for $300. The guy never shipped... Paypal buyer's protection covered it.
- Bought 2nd MSD Digital 6 Plus from FB marketplace for $300. The box is bad, according to MSD's test procedures & won't crank car. Paypal will also cover this box.
- Bought the GT40 'big shot' plate, which I think is cool, but is unfortunately too incomplete to use (requires 'nitrous logs').
- bought used nitrous kit from the guy I bought black jack back from for $150... Too incomplete to use.

So, I tried to piece things together on the cheap, but to hell with it, I've waited a long time, only to be disappointed when finally trying to put it together... I'm in no way criticizing those who like biding their time, finding things on the cheap, and piecing their way to a build, but this just ain't the way for me... Broke out the wallet and ordered a new Zex kit & new MSD Digital 6 plus... Time to get this F@#$er done.

- Autolite 3923s are in
- Bottle mounted, lines run to engine bay
- nozzle installed into intake elbow

Will relist the bull assortment of parts for someone else to finish piecing together...

Pics coming soon

Nitrous and associated electronics are in:





Settings:
I currently have the jets for the 150 shot in it. Michael Bell, who's done more nitrous foxes than anyone else I've known, told me not to spray more than a 100 shot unless I'm using a plate between the upper and lower intakes. That's a bummer, because I want over 420rwhp to the tire... A number that's safe for the stock block/internals and gives me a decisive edge over the performance target, the 392 Challengers/Chargers. I think I'm likely to take my chances. Hell, I'm already taking my chances spraying a motor with unknown, but likely in excess of 200k, miles. Frankly, killing this engine over the next few years is inevitable, if not from nitrous, then from mileage. So, I'm already scoping out motors both new and watching the market place to hopefully get ahead of it and have one ready to drop in when the inevitable comes.

I've set the new MSD box's limiter to 6,100, about ~150 RPM below the stock fuel-cut limiter. I've set the nitrous window switch from 3,500 to 5,900. The low end is well above the recommended 3k minimum to prevent over torquing/over nitrousing the cylinders. It also keeps me spraying in 2nd gear, even if I short-shift by as low as 5,250 in first gear. On the high end, it'll cut the nitrous before I hit the spark-cut limiter from the MSD box. I set the WOT switch to 4.3V, and it's seeing 4.5 at WOT.

I also set the MSD box to pull 6* of timing to start, which is consistent with the 2*/50-shot rule of thumb.

Next steps:
I should get a call from a local shop by the end of next week to set up a dyno-appointment. Based on the comments about distribution, I'm going to aim to jet for 11.5:1, which is also what I've always tuned my turbo cars to. I get the impression that the cooling effect of nitrous actually allows for far leaner AFRs approaching 13:1, but on this front I really do prefer to play it safe. They'll also weld in some Wideband O2 bungs for me on the headers.

I've got a fuel pressure & AFR gauge to install in a 2-gauge A-pillar mount, which I might do today.

I also noticed a lean pop, last night, while driving the car for the first time in a while. I think the car runs pig rich at idle & cruise. So, what I suspect is that the 3923s are fouling. However, I'm a little on guard, because I just replaced the injectors. I'll probably pull a couple plugs to take a look.

It's also about time for me to install the Moates Quarterhorse I recently bought.

Edit: Oh, and I made my decision on the gears. 3.73s are on order. They'll put me through the traps at 122mph off of the Spark-limiter.

I don't think it's worth what he's asking, and who know if the solenoids are still functional, but this is the hot ticket for the GT40 style intake, and it'shard to find. I have the plate, but not the "logs" that attach to it. I'm tempted, but can't justify it.

I dunno.

The dyno day is set for 8FEB with a shop in Spring Lake, NC.

Took a little insurance out for my dyno/nitrous day. Figured the Walbro GSS307 (255 LPH) pump that's been in the car since I bought it the first time in 2014, and who knows how much before that, might be a risk. Though the Zex kit is supposed to shut off if the pressure drops to less than 38psi, that would still ruin a perfectly good dyno-day appointment. So, I figured why not spend the $80 & swap in a new 'hi-pressure' Walbro GSS340 in its place? Also found where the smell of fuel's likely been coming from. Looks like it's been leaking around the vent cap. So, I added another O-Ring and made sure the seal when on right. Hope that helps, but didn't have a spare to replace it with and don't know for sure, yet.

You know, they say...


Here's what that looked like for me, this weekend:



I don't even know WTF that was. How does that happen?! I just kept trying to hit it with my allen wrench and couldn't figure out why I couldn't even get a smaller one on there. Once I got the mirror out, I scratched my head and tried for about an hour to get vice-grips, pliers, anything I could do to get on that damned thing, and it was all a no-go... It was just too close to the firewall, and in the middle of everything back behind the Throttle body was also in the way, which led to this:



That was ok, though. It was good to get in there and clean a few things up.

So, what I originally thought was gonna be a 20 min just to replace a Kirban AFPR with an Accufab to gain an extra port for a fuel pressure gauge I'm installing ended up taking all afternoon just to swap it. I guess I'll do the gauge after work one night, or next weekend.

Noticed a lot of oil in the runners. Should I be worried? There's no EGR. So, I guess it must be sucking some of it up through the filler neck an into the tube that runs to the TB.



There we go... Much better!

I'm at the dyno, now. We've made a few test/baseline passes. I was surprised to see it range from 260-268.

It has slightly edged over 270 in the couple dyno pulls I've done with it in the past, but I think thise were with U/D pullies and the T5 trans. Now, the stock pullies & T56 trans are on it. So, I'd say that with different day/different dyno, it's too negligible to say that the T56 has really cost much power... Maybe 10?

Getting started with the nitrous passes, now. It ran a bit lean on the baseline passes. So, I'm starting with 100 shot nitrous and 125 fuel fuel jets, aiming for as rich as 11.5:1 to protect from any distribution issues. First nitrous attempt didn't work out.

So, we're diagnosing why the nitrous didn't activate... Hope Black Jack's 150-200k shortblock holds together boys. Keep your fingers crossed for me!

Everyone knows you get the most power in reverse...