For 2023 I am changing to a solid liftter cam read on How much can I give my 350. Her are my specs. It's a 355 with Forged pistons, Index ground crank, 73 rods with ARP bolts, ARP studs in the mains, Pop Mechs. Cam 507 intake 502 ex. 230-245 @.050 TA Roller Rockers TA Intake, Holley 750 dbl pump, MSD Ignition, MSD Distributor, Ported Heads, 235 intake 176 exhaust, Larger valves, Port matched to intake, TA front cover with oil passages opened up with high volume oil pump, Mallory 140 electric pump with return line, Regulator with gauge, I also am running NGK plugs using UR5. I would like to get the Nitrous Works set up with the Billit Atomizer it is about 450 bucks. It starts out at 120 shot and can work its way up to a 200 shot. I would like to give it a shot but can it handle the power any ideas? How about a Paxton? OH YEAH!
You can spray it, but you MUST be careful. You didn't mention your compression ratio which is a factor in determining how big a hit it can take. You might want to start at a 50 shot and GRADUALLY work your way up. If you search the board you will see the 350 does like nitrous.
Nitrous is major bang for the buck dude. I agree with AZ-69 on starting on the low side and make sure comp ratio is below 10 to 1 before unleashing too much go gas. Getting enough fuel to the mix is CRUCIAL. A WOT switch is very important in not damaging your innards too. You'll love the added punch when you get the set up right though.
hey fox, u should try asking Buicks4speed from what i read his the mastermind of nitrous and supercharging.oh also i know 10sec350 was shooting lots of nitrous himself.they got real world experience.oh and my opinion 125 shot should not be that bad just watch out for lean cylinders.
Juicin' In dual plane intakes a 125 shot is about as much as you want to go and be safe. 175 Hp and up you "can" run into fuel distribution problems. The only cure would be to plum the intake for a Fogger/direct port setup. It's easy but a sportsman kit costs a little more and start at 150, but you would have no fuel distribution problems that a plate on a dual plane has. Until you adapt a single plane Chevy intake or they come out with a Buick Single plane it is a problem you have to work around. I have never seen anything with 8 cylinders that can't handle a 150 hp shot that has the fuel to support it. Just find your lean cylinder and watch it. I still like side to side spray bar plates on dual plane intake if you can go through the trouble of getting one. A Cross-Bar plate works if you just use the side bars. I wouldn't worry about compression with the small amout your looking to spray. The cam will work very well with nitrous. I believe the Pop Mech cam has 116 LC which kills a lot of midrange on the 350's. Advance the cam at least 6 degrees if you can. This will pick up your midrange and add about 20hp+ on nitrous. With that cam I wouldn't be afraid to spray the nitrous to it. It kills cylinder pressure so you should be able to keep gaskets in it without any problems. Just remember to take out the recommended timing. A add-on Muti-function MSD box is an awsome plug in to the 6 Series boxes. It has many features that you can use with nitrous that will help you tune it. Run WOT switch and a fuel pressure switch. I prefer the Edelbrock, NOS, and Nitrous Express kits. Nitrous Works is ok. Run a WOT switch, and fuel cut-off switch and power the solenoids thru a relay. Don't waist your money on fancy spark plug. AC Delco RTS43's or 44's will work fine. I like the NGK's but I will have to get back with you on the part number. I'm a big fan of the blow-thru supercharger setup's. If you can afford it. Carbs work great as long as you set them up right. You would need to go down to a 650 DP to work right. A 750 is a bit big for a 350 with this combination. Again, the cam you have will work great with a blower also. Just make sure to get the a good hat for the carb and a carb with adjustable air bleeds since t his is the big key to getting a carb to work with a blower. I have made a post about the hat to run before. Just do a search and you'll find it. A boost retard is a must to keep out of trouble as is a boost reference fuel regulator. Stay with an ATI Blower since they have the kits already for the Buick. You do have headers, Right? RPM is what kills the 350. Keep it below 6000 with heavy forged and 6200 with lightweight's. With nitrous, you don't need rpm which is what is so nice about it. Anything but a 125hp shot is a tease. :Brow: :TU:
Lets juicem it. Thanks for the help. My compression is 10.6, I think my my headers are 1-5/8or 1-3/4 may have to get back on that. I also have a 2-1/2 inch exhaust with x-pipe and Flow-Master mufflers. I was wondering if I can still use the 1 inch spacer under the carb and do I put that under the spray bar. Buicks4Speed I read somewhere to try the NGK plugs, they actually did good I just checked one out and it had a nice tan color. These plugs also have an extended tip on it which suppose to help but who knows. I also don't know if these plugs would work with the Nitrous because of the extended tip. I see that you recomend the AC 43 ts plug which I think is not an extended reach plug. The jetting I have been using on the Carb is 70front 77rear to 72 front to 80 rear. I also use a 16 inch K&N Flow-Control air cleaner, with drop base and 4 inch element. I think that I do have the cam 4 degrees advanced. I also have 373 gears 3500 stall convertor You also say that a duel spray bar would be better? I have heard that there are problems with a duel plane intake and Nitrous, but it seem that a lot of people are using it so why not. I would take it that the spray bar goes on each side of the center plenim. Can you get that as a separate part? Was there a particular kit you liked over the others? I was just told by someone else to buy the Nitrous Works kit over NOS. Summit Racing is just down the street so I can get any kit. I will be interested in reading what 10Sec350 has to say on Sunday
summit racing is just down the street ???u lucky SOB!!!u know how many times i had to pay their crappy $8 handling fee for 1 part. oh and how good is the NOS top shot system?? it looks like a nice way to add power without no one knowing.oh and buicks4speed what is ur favorite cam to shoot 150 hp on a 350 with a setup like fox's den. i want to build a similiar setup but with 390 gears same stall around 3500.probably around same motor specs.all motor i would like to see 12s and 11s on nitrous that would be my goal.
On the plugs. When you say extended reach what exactly do you mean? Do you mean they are a standard .460 reach plug for iron heads with a projected tip? The number on the plugs I was referring to was Race NGK# R5674-6 or a -7. Im not sure what a UR5 plug is. You get the same style plug with a non-projected tip but for a small shot going to a little colder plug is all you need. For a cam, the TA 413 on 112 LC for a 350 is a hot ticket. I would install it 6 degrees advance for nitrous. TA recommend/sells the 413 be on 112 for the 350. You will need an 8 keyway billet timing chain setup to get it advanced that far unless you request the cam to be ground with 6 degrees advance in it. 11s should be easy. Nitrous Express sells a billet plate that runs an open plenum and discharges out the side. I like this for a dual plane application. On the plate setup I was referring to earlier, I was talking about a cross-bar plate system and only using the side to side spray bars. You use the 300Hp jets which will in turn give you 150. 250 Hp setting will give 125Hp. On the carb spacer, if you run the NX Plate you wont need the spacer under the carb as I believe it is 1 thick. If you run a nitrous plate then I would add the 1 spacer. NX sells a plate conversion if you have an existing system. I have the part number for both but what kit are you converting? On the dual plane, if you can get it balanced and get rid of the lean cylinders, you should be able to spray up to 200. If you have lean cylinders, they get worse with nitrous so it limits how much you can spray before burning a piston. The only thing you can do to help with this is to buy a Multi-Function MSD Box to plug into you 6AL. Then get the #1 cylinder pickup lead so you can program individual cylinder timing and take an extra 3-4 degrees out on the lean cylinders to keep them from burning a piston. If you want to stick with a dual plane and spray over 150 then go with a direct port nitrous kit. You can still keep the shot down to 150 if your scared. The x-pipe will make a big difference. You can also look at a 3 X-pipe that drops to 2 after the X. This will help with the added volume of nitrous but not a must. Its cheeper than upgrading to a complete 3 system and will still perform as well as a 3 without a X crossover. On a stock 350, you can put a 150 shot on it just the same. You would need a Aluminum intake since the nitrous wouldn't spray too good thru the stock 4 hole carb opening. It works great on low compression and will actually work better for stock heads.
Guy, I ran a NOS cheater system. Ran the 4th stage in the system, it was 200 or 225 shot. I had Speedpro forged piston, stock cap screw rods, TA 310 cam, TA intake, 1 3/4 headers, Holley 800 DP, home ported head with stock valves "no flow #s". My car was 3540lbs. went 11.22 at 117 shifting at 5400 rpm. My engine was so basic it was sickening. If I was you I would do it! Just watch your timing, that it what finally did mine in. I didn't have the distributer tightned down enough cooked a piston along with some valves. Even though it was hurt it still ran 11.30s. I would be careful of rpm with stock rods. My car would have easily went 10.80-10.90, but I had a bad ignition box at the time and would run out of steam at about 1100 ft., just about costing to 11.20 passes. Right after I fixed the ignition problem I roasted the piston and valves! ou: I still have the engine, needs a little work ,but I may break it out again someday with a few changes :Brow: Car was an absolute blast on the street, would hook almost like at the track! I have a picture from Etown 2001, will try to post it. Jeff
10sec 350, what rpm did you run, and what was your compression ratio? BTW, what engine are you running now?
I was shifting at 5400-5500 rpm with 9.5 compression. I have a worn out 455 in there now with a fresh short block on the way. Also build a 464 with Bulldog heads for my 70 car. BTW running a heavy nitrous engine makes for an expensive day at the track! You will use twice the fuel plus the nitrous bottles. Jeff
Thanks for the answer. I have thought quite seriously about the expenses involved with nitrous which is why I settled on a turbo. So many magazines like to talk about the bang for the buck factor. I wonder if they take into consideration the costs of refilling the bottle(s) over and over. From my research a GT42 should do what I want...and I shouldn't "run out of turbo", either. :Brow: The RPM and compression ratio help me get an idea of how NOT to blow up my engine. I think 8.5 would be better than 9.5 for my idea. Maybe 9:1 with methanol injection and intercooling. A 464? Niiiiice. If I could buy the new cast iron 455 I would...and add a centrifugal supercharger. Yes, I know I'm sick. Good luck with your 464.
Buicks4Speed When I said "extended reach" I did mean projected tip spark plug. These plugs stick out farther ino the combustion chamber as compared to the original plugs that went in in1971. I was wondering about the plug you mentioned the NGK #R5647-6 or 7 [colder?], if the plug was a taper seat plug. This is what the ur5 NGK plug is. I thought that I tried to get that plug. I got a number off this website somewhere here last year but the plugs turned out to be the plug with the washer on the end so I had to take those back and I got the NGK ur5 plug which was supposed to be the equivalent to the other plug. But any ways should I go back to the original plug 1 size colder which I think is the AC R43TS or try one of the other plugs mentioned and just go colder. I ran 11.81 @112 3500 stall 350 trans 28" tire 125 shot of spray 10Sec350 What gear did you have in there. Sounds like you had it running pretty good with the 350 and Nitrous. I am running a 373 with a 28 inch tall tire.
SO you think a turbo is cheep??? :laugh: It does have some pretty good benefits and make good power but nitrous is still cheeper. Intercoolers, turbo, piping, custom headers, special carb, regulator, pump. A good turbo kit/setup I think ends up running 3-4x as much. I'm all for it though. :TU: It I would do a strong nitrous setup oon a 350. I would use the NOS Sportsman Fogger. It works 50-250HP and costs the same as a nice plate system and it will keep the fuel distribution even. 1 galFuel Cell, Holley pump, Regulator, NOS Sportsman fogger kit, Bottle heater, MSD Timing retard box-$760.00 + shipping and fuel fittings and lines. E-bay Rocks! :beer I wish I could say I could build a turbo setup for that.
A turbo is cheap? Heh. I was quoted $7000 for two turbos (with intercoolers), custom intake plumbing, and custom headers. And I already have Fuel Injection! Nitrous is cheaper - way cheaper. (Although turbos are cool- and they make a neat noise!) -Bob C.
Man did this create some buzz. Now all we need is that single plane intake with the bosses for the nitrous of course and maybe that 455 I have will just sit a little bit longer. But I am not going to wait forever. I have a brother with a Mustang that has a Procharger looking at it and he plans on 800 horse, so let's get it on.
