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75 Wet shot.

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strungout6

Active Member
Joined
Feb 14, 2016
Messages
101
I have a hatred for extra money in my wallet so I decided to do a 75 shot of Nitrous. My justification is that I will not have to lean on the converter so hard to launch and I can get away with not having a trans break. I will start with my two step on 3k. Use the trigger wire for the two step to signal a normally closed relay, two step off...Nitrous on. My question is If I use a hobbs switch and turn the spray off at a given psi between 10-15 what ever I decide works best, I shouldn't have a fuel delivery issue with my set up because the system currently supplies adequate fuel while under 27lbs of boost? Is there more fuel required on a 75hp wet shot and 10psi than on just straight 27psi? Its a single nozzle alky, 75lb injectors, 93octane car.
 
I'd be logging fuel pressure for sure with a setup like that and a good wastegate with a good controller. I used 50hp and picked up over 100hp. You may be ok with it off at 15psi but timing and a/f are critical or you could heat up the cylinder and have problems later in the run


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Yea. I know im right on the line but.....if I watch fuel psi I think it will pay off in dividends. Im hoping for 6.2 or better.
 
If you aren't logging it and the ecu isn't compensating for it it's a crap shoot


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Is there more fuel required on a 75hp wet shot and 10psi than on just straight 27psi? Its a single nozzle alky, 75lb injectors, 93octane car.
with a wet system if you have enough fuel pump and the jetting is correct the fuel is there with the hit its instant cylinder pressure.i ran a wet shot on a chip car and it ran great and with the wet system the afr never went lean and egts actually dropped.personally I think you should run some race gas for a 75 shot and cut back the timing even if your going to use it for off the line you could detonate the 93.i ran twin nozzles with both 93 and race gas and really enjoyed the nitrous but its tough on parts
 
Thats exactly what I was thinking. The wet sys should if the jetting is correct "handle itsself" so to speak. Maybe pull some timing but I will watch it. Ill do some test hits and see what the log shows. I am alittle worried about my connecting rods they are the only stock part left. Guess we will see..When its installed I will post the 60' diff between spraying and just leaving high on the two step. Should be interesting. PEOPLE HELPING PEOPLE powerful stuff.
 
I've used nitrous to spool also. Currently has a wet kit on the car now. The easiest way to set it up for spool is on a push button. This is how I did it and the car picked up quite a bit. Foot brake to 2800 rpm (my max stall my brakes would hold) banging off the 2 step, hit it with a 50hp shot and insta spool. One thing about it you don't have to hit the nitrous but for 2-3 seconds, that's it lol. Once the turbo is spooled it will sustain that psi. I have a trans brake now so haven't really used the nitrous recently. I keep it on the car cause ya never know whos going to call you out and what money is on the line.
 
Yea thats another reason I want it. When im out and about and some body wants to try me. From what I have researched its pretty much instant 15psi..cant wait. Im doing a timing cover gasket on a gmc arcadia and he is paying me with the nitrous sys. Will work for car parts..lol
 
I haven't had the guts to use anything past a 50hp shot lol. I was going to go to the track last night but had an issue with the car that was nitrous related. Hooked my bottle up and cranked it open to check for leaks and then proceeded to test the noids so hit the button a few times. Went in the house to grab my laptop and other stuff I was going to need for the night. In all I let the car sit 10 minutes before cranking it. Went to turn it over and kaboom! Blew my intake up lol. In hindsight I should had disconnected the ignition and fuel then cranked the motor to evacuate the residual nitrous fumes.
 
Thats exactly what I was thinking. The wet sys should if the jetting is correct "handle itsself" so to speak. Maybe pull some timing but I will watch it. Ill do some test hits and see what the log shows. I am alittle worried about my connecting rods they are the only stock part left. Guess we will see..When its installed I will post the 60' diff between spraying and just leaving high on the two step. Should be interesting. PEOPLE HELPING PEOPLE powerful stuff.

Are running upgraded axles? Or still running the stockers?
I do not see any mention of this in your sig.
If you are still running the stock axles the drivers side will be letting go soon when
you get a good 60' with that 75 shot. Sometimes the tire takes out the rear quarter panel.

Also which 275 mickey are you running?
 
Iused 75 shot years ago, but with boost at 9 psi and it would go to 12psi when spraying. The kit I have came off a GN that sprayed from 125 to 175. 175 would break stock right axle every other pass. Race gas, inline pump, chip burnt for spray, 22psi, stk ic/exhaust with fenderwell dump, and a stall. 7.20 on 125 and 6.9's on 175. This was in 1988/89 era. Watched him take 10k from a trailered/sprayed big block 89 camaro lol on the street. Camaro had him in the 1/8 but GN drove around on big end by a car.
Try a 35 shot and cut it off at 8-10psi.
 
Im running the et street's. The car will only hook after the big tire bracket guys make passes and some vht put down. The rear axles are stock currently, however when I install the kit Im going to slide in some Moser's or equivalent with c-clip eliminators. Now that its boating season I will not be hauling the car to the track till Sep/Oct time frame. Its just too damn hot and humid here. I will probably be running a 50 shot at first just to get the feel for it. My last time at the track the car broke the RJC engine brace so Im going to have to take it easy at first to make sure nothing else was damaged.
 
I believe Eric at TURBOTWEAK could cut a chip that would take out timing enough run it the entire 1/4 instead of using NOS to boost. That was AMAZING in 88/89. I could see how it was breaking axles.. Most GN's could pick up 2 sec. in the 1/4. I sprayed my Hot Air in the 12's... Nothing special: Kenne Bell NOS Hot Air chip, external pump, K&N cone filter, shift kit, shimmed rear end (beats welding). Started with a 50hp (90hp on a Hot Air). I got to a 90hp (135-145hp) and stopped.. My tranny started to slip.. But I had HELL of a time spraying off the line... My buddy started spraying and I followed in my Hot Air. He when in the 11's with a pretty much stock GN.
 
I believe Eric at TURBOTWEAK could cut a chip that would take out timing enough run it the entire 1/4 instead of using NOS to boost. That was AMAZING in 88/89. I could see how it was breaking axles.. Most GN's could pick up 2 sec. in the 1/4. I sprayed my Hot Air in the 12's... Nothing special: Kenne Bell NOS Hot Air chip, external pump, K&N cone filter, shift kit, shimmed rear end (beats welding). Started with a 50hp (90hp on a Hot Air). I got to a 90hp (135-145hp) and stopped.. My tranny started to slip.. But I had HELL of a time spraying off the line... My buddy started spraying and I followed in my Hot Air. He when in the 11's with a pretty much stock GN.
 
My kit should arrive today or tomorrow. Im going to get it installed and graph fuel psi vs boost while spraying. Im certain I am at the limits of my 400lph pump. Ive got a new 475lph in the box waiting. Starting at 10psi off with the Hobbs I will slowly up the psi until I feel comfortable with the performance and info from the PL.
 
My kit should arrive today or tomorrow. Im going to get it installed and graph fuel psi vs boost while spraying. Im certain I am at the limits of my 400lph pump. Ive got a new 475lph in the box waiting. Starting at 10psi off with the Hobbs I will slowly up the psi until I feel comfortable with the performance and info from the PL.

I've sprayed a 125 wetshot with a Red XP and a pusher pump with 42's .... at it was way safe but it was on 108 ..

A bolt on car with a 125 shot will run solid 10's anytime anywhere . Actually a 75 shot will get you in the 10's on a bolt on car ... just be careful its hard on drivetrain parts
 
I have a hatred for extra money in my wallet so I decided to do a 75 shot of Nitrous. My justification is that I will not have to lean on the converter so hard to launch and I can get away with not having a trans break. I will start with my two step on 3k. Use the trigger wire for the two step to signal a normally closed relay, two step off...Nitrous on. My question is If I use a hobbs switch and turn the spray off at a given psi between 10-15 what ever I decide works best, I shouldn't have a fuel delivery issue with my set up because the system currently supplies adequate fuel while under 27lbs of boost? Is there more fuel required on a 75hp wet shot and 10psi than on just straight 27psi? Its a single nozzle alky, 75lb injectors, 93octane car.

In all honesty you are probably about to break your car. Your sig says PTC 3300. If you have a 3300 stall, a 64mm turbo, and a healthy head and cam combo... you shouldn't be leaning on the converter much at all to launch. If it is slow to spool you may was to dig deeper into that before adding nitrous. You should post a log of your car making a pass or at least launching. I don't intend to come off rude or like a know it all. I would offer you the same advice as any friend with TR I would be stuck fixing.
Also can you give more detail on this converter, part number, a Precision Torque Converter or Performance Torque Converter?
 
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