Addition of another crank key. Adding blower to my small block setup and plan on adding another crank key. What size should I plan on? Another stock key or something bigger? If bigger what size?? Thanks, Max

I have had a few blower motors, always used 1/4" key for the second one, both 1/4" ones with the Hemis. Never had a problem.

Twin turbo sizing for a 400 stroker? not sure on the route of 451, 471 or a 499. Left the diesel truck world and going back to gas. 1100+hp is the goal on pump gas/ e85 mix.

My 470 worked real well in that hp range with a pair of old precision 72mm compressor wheels and GTQ turbine wheels. Those turbos cost about $700 each.

Just a quick question,
To mount a NOS bottle inside the drivers compartment is there anything special needed to have it inside ???
I mean like a blow off valve, down tube thru the floor etc.
A friend wants to install it but he has no room in the trunk or anywhere beside the passenger side floor board.
Thanks, David

I believe you just have to have the blow down tube run down through the floor.

Correct, solid mount and blow down tube installed.

Thanks for the info Guys. I Appreciate it.
David

what size headers did you end up using? Send me a message if youd like.

Patrick

A pair of Borg Warner S366's would work great on that engine and would easily meet your HP goals with room to grow if you keep it 400CI.

If you go the 499CI route, I would look for a pair of 76mm turbos.

Assuming this is more of a stock block, lower budget setup?

Billet main caps, girdle, rods, half filled and so on.. Just plan on for heads finding a set of used ported something aluminum. Going with a blow thru carb for now but will be intercooled. Already have a full billet trans with a manual valve body and lock up. Cutting the cummins bellhousing off for a big block ultra bell. I had a 900hp cummins in my chassis but was way to dirty for the street. With the cummins in the 4wd chassis it was 4770lbs without driver...

Single bar plate ???

Monte, tested twice now and the results ? Single bar plate won't pick up above a .116 jet. I'm using a trash can, -6 feed line. Is the bottle valve the restriction ? I'm using OLD nos 10 lb bottles with the "straight" hi flow valves, not the angled ones. Car went 5.30 but won't go more than 132.88. So far best 60 is only 1.28 creeping up on the progressive and almost no launch curve with the "new" MT 275 , not the pro

Tuneup is .082 fuel, .116 nitrous(tried .126 no better, lowered fuel psi same A/F )
Timing going down the track 22, b1 mc with softened chambers. A/F is usually 12.8 to 13.2
Straps are showing no heat, but adding .5 of timing showed no gain in mph so I took it back out.

I know you will have more questions, but this is all I can think of. I'm running ultra street so I Ned to go at least 140 to 145 to be competitive.

The plate is likely maxxed out. Even with a trashcan, a single bar plate will only pass about 1500 lb/hr tops. Now guys can claim whatever for HP, but stuff flows what it flows. Is your trashcan a .156 or .170

The trash can is a .175

I'm still using standard -6 braided line, not the "large" ID line. I was going to switch to .500 orifice bottle valves and as short of a large ID -6 line as possible.

Like I said, the ultra cars at Cecil are almost all going 137 - 145 so I've some mph to find. Still have 4.10 in the rear and leaving in second (1.48) I was considering 4.29 but I want to max out the plate first

I can run a double cross with a -4 line, is that a better set up?

A single bar plate is a single bar plate and they just flow what they flow. Nobody makes a "magic" plate. The obvious answer is a larger bar with more and bigger holes......BUT it doesn't work that way. Companies make plates with 1/4" bars but they flow no more. Has to do with back pressure on the bar. More engineering in a plate than people think.

What I usually do for that class is use a max ported Trashcan with no jet. Take the jet holder fitting out and just run a straight number 4 line from solenoid to plate. This lets if flow all it will flow with no restriction.

Larger line and bottle valve won't hurt, but it likely won't help either. A .250 orifice solenoid also gets you a bit more flow, but you can't progress it.

And YES, a Crossbar with a number 4 line will pass more.

Don't know anything much about your motor, but I would bet the cam is holding you back some as well depending on who ground it for you. 132 is definitely light on MPH. I have 18* smallblocks that run that mph on a single bar plate, so something is off somewhere. If you still had the -1s..........well that's about the same head as a good 18* small block, but those MCs done right should move a lot of air

There is not 10 mph in your tune up.........I guarantee you that and you know your 60ft is way soft

Scott made the cam. It is a billet one , I would rather call you and tell you the specs than post it on here

I am crossing at 7400 and with 4.10 I know I need more nitrous to rpm enough tomgom140 ?


Within ten passes I got the 60 to 1.28 at Norwalk, no where near the flypaper surface of Cecil county...lol I'm expecting better at cecil

Also, the car is 3300 150lbs over ultra rules

When building a nitrous motor, is it better to use a bigger intake (extra plenum & runner volume)? Meaning an intake manifold that's too big for the motor in N/A form.
Seems like I've always heard the more plenum volume the better w/ nitrous.

I'm using a plate system, but it doesn't seem like this would matter as much w/ a fogger?

i am thinking of running a 2 plate stacked 2 stage system. the 2nd plate would be a completely seperate system except for the fuel. i use a dedicated fuel supply mounted underhood with a holley blue pump. i would run the fuel for the 2nd kit off the other side of the regulator. am i asking for trouble?

the first hit would be a 150 hp hit off the line with a 250 hp hit in 2nd gear.

motor is built for nitrous with forged pistons and proper ring gap.

Question on spraying a small shot with a "loose" NA converter.

493" street engine running a 727 and a 9.5" Dynamic converter. Converter flashes to ~4500. I am looking to hit it with a small shot, 100-150 HP. Am I going to blow right through the converter?

I was told not to do that by guys that know a lot more about nitrous than me. You need a separate regulator for the 2nd kit. Not only to set the pressure for just the 2nd kit, but b/c of a supply issue at the regulator.