200 shot on 146,000 mile long block?

[pyro719]

I want to spray a 200 shot on my 146,000 mile longblock. Could I do a 100 dry and a 100 wet and get away with it? Im in colorado so the motor dosnt make very much power at this altitude.
__________________
94 Z28,CPT RACE 4l60E,Fuddle P.3000, 145,000 miles, 3.42's, free mods,160 stat,LT4 hotcam kit, Homemade CAI with ram air mod, autolite 104's, 24# svo injectors,Pacesetter LT"S,2.5" true duals all the way back, ZEX dry 125 shot, walbro 255lph.PCMFORLESS tune

[BLOWNDFIZ]

You could get away with it.....but I bet she blows up!

You would have to have everything, tune, fuel system, etc. dialed in perfect to have any longevity. JMHO!

[96lt1m6]

i surely would not recommend it!!!!!!!!!
my buddy had a zex 125 on his 94 bolt on z and it ran GREAT! SO of course wanting more from it he upped it to 150 made 2 passes and #8 left the bore,i pulled the motor apart and found aluminum fragments all in the intake,wedged in the valveseats,looked at all the pistons until i got to #8 and the only thing there was a bent rod and a wrist pin.....
personally after seeing this damage, i would like to conclude Lt1s can handle this type of shot if it had
1.timing retard
2.a better fuel delivery(bigger pump and fuel rail mods)
3.larger injectore(30-36)
4.not such a hard headed owner that would not do these mods as suggested,he wanted to see what would happen!:shame::doh:

[Z28pr0jekt]

Take a video... that is all

[pyro719]

I have a walbro 255, 30# svo injectors and will be tuning it on the dyno. Its not my daily driver so if it goes boom all well. Time to build a forged bottom end.

[96lt1m6]

I have a walbro 255, 30# svo injectors and will be tuning it on the dyno. Its not my daily driver so if it goes boom all well. Time to build a forged bottom end.


Great idea why chance destroying a good block from flying internals!

[harner]

That's why they make assembled short blocks! Ha.

[KissMyWhtSS]

I wouldn't, then again the most I'd consider running on a stock high mileage shortblock is about 75 dry.

You would probably be able to get away with it for a while if your careful and have everything tuned just right, though I wouldn't suggest it but I'm not the type of the person that tears up my possessions.

[Camaro_94]

If you want to blow it up, go for it. I dont see it lasting long at all. Build it up first then spray it. Thats what I would do at least.

- Mike

[KissMyWhtSS]

If you want to blow it up, go for it. I dont see it lasting long at all. Build it up first then spray it. Thats what I would do at least.

- Mike
:stupid:


I'd say throw a 50-75 shot in it then start building a motor. That way you'll have a forged motor ready to go then you can sell your old motor and have some $$$ towards a tune or 200 shot nozzle.

[Camaro_94]

:stupid:


I'd say throw a 50-75 shot in it then start building a motor. That way you'll have a forged motor ready to go then you can sell your old motor and have some $$$ towards a tune or 200 shot nozzle.

I'd get a motor that can handle the abuse first then go for the nitrous. To me, a 50-75 shot isnt even worth it in the first place.

[IronOutlaw]

DO IT.
Just bring a trailor just in case, and if it doesnt blow up, post the timeslip and dont do it again.

[MeanGreen94Z]

my purge is more than a 50 shot... 75 feels good on street tires and that about it. 125 were talking a little nitrous, 200 way to freakin go! if you have a timing controller, window switcha nd a endless supply of fuel then your GOLDEN! "tune the NAWZ timer and youll run 9's!" lol $5 if you know where thats from. anyway if you do it and it blows up bad and takes out the block, SO LONG AS YOU GET VIDEO AND PICTURE PROOF showing you were spraying 200 to it ill GIVE you my old block and pay half the shipping lol. but ill end with this. use a NOS brand nozzle with their jets and youll last, use a HSW black momba and their 200 jets... you might not. NOS brand is CrankHP HSW and a few others are RWHP. remember that! i had a 150 in my momba and it lasted just fine through a few bottles 3rd kit ive had on the car and probably the 30th bottle i putthrough the motor. ive had anywhere from 150-175 starting the first kit at 135k and took the last off at 152k. the motor did finally let go but was NO result from nitrous. its my belief it was from too much valvespring on the stock cam spinnin it to 6000 on stock cam :D

[pyro719]

Fast and the furious lol, gimme my 5 bucks. The block is no problem I can get lt1 all day long for $800 for complete longblocks. I want to run my zex dry 100 shot first stage and an nx wet 100 second stage. I think it will make it for a while.

[MeanGreen94Z]

lol. im not much on dry... wet is the only way to go, and use a FPSS with that. dry can get lean too easy.

[solga 511]

I just want to say that I have absolutely 0 experience with the Zex systems and I do not like the "dry" method of nitrous delivery. That being said, as long as everything is 100% spot on and ALL proper safety equipment in place, I believe that you will be ok as long as your engine is in good shape...... but I bet it won't last long either. Doing this in 2 stages will be a little easier on your engine than just blowing 200 out of the hole. You also mentioned that you are going to have this dyno tuned, for the N2O on both stages ?

Either way, good luck and make sure you get this on video. I just wish I could be there when it finally goes *pop*.

[BLOWNDFIZ]

ZEX systems are pretty sweet. Supposedly one of the safest kits out there since they use a sort of "control box" to give the motor the correct amount of N20 compared to fuel available. They are made and designed by Comp Cams who we all know makes quality products.

IMO, I'm like MeanGreen94Z I prefer wet over dry. You gotta figure your fuel pressure is going to be high already which lowers your volume of fuel available spraying your dry shot, then trying to add enough additional fuel through the wet nozzle I just don't think a single 255 is going to give you the volume you need to sustain a 200 shot. If you add a seperate fuel tank and pump for the wet shot them maybe you will be OK.

I'm guessing BIG BOOM as soon as it hits!!!

[chevy42083]

I'm guessing if you dyno tune it for the nitrous.... you won't make it past the tuning stages ;) But I really don't have much experience.

I've also heard tons of praise for the Zex stuff.

I do know someone who sprayed ~200 on a stock block for a couple runs. I don't remember if he popped it on the 200, or if he pilled up. He made his best pass, got it on video... and most importantly, was already planning on a new motor.
BTW, went by MeanYellowZ, and it was an LT1 S-10... but I think he's from the F-body side of the net.

[pyro719]

I might just tune the zex dry shot to 150 on the dyno and call it good on the stock block. Then when it pops Ill build a nitrous motor

[solga 511]

Might wanna start savin' for that nitrous motor now........

[stormy69]

my 160k mile 5.0 takes 175 so my lt1 better!

[AZ2ENVY]

IF its tuned right with plenty of fuel and retard you can run a 200 shot safely :)
Ive done it and my LT is still running strong as an ox :)

[941le]

^^to bad u cant keep trannies and converters in the car

[bricez28]

lol^ owned. can a stock rebuilt motor take a 125 shot?

[Camaro_94]

lol^ owned. can a stock rebuilt motor take a 125 shot?

It should be able to for a little while at least..

[AZ2ENVY]

^^to bad u cant keep trannies and converters in the car


I wouldnt be so quick to talk now that I have a Yank and CPT Pro Race 60E :devil:

[Twisted Z]

GET GOOD VIDEO!!!!!

Miss the tune and you will see smoke like this head gasket!



YouTube - Z28 Vs Hayabusa . . First time around

[Teal_LTXZ]

^^to bad u cant keep trannies and converters in the car


Too bad it has nothing to do with the Nitrous :laugh:

[Camaro_94]

GET GOOD VIDEO!!!!!

Miss the tune and you will see smoke like this head gasket!



YouTube - Z28 Vs Hayabusa . . First time around (http://www.youtube.com/watch?v=1-09I4m-x5o)

That sucks!! Did you already fix it?

[bottledbird68]

So, if I were to go with a 2 stage wet kit, 100 horse on the first stage, 200 horse on the second, a walboro pump, and msd timing controls to pull 6-8*'s of timing, along with the right cooler spark plugs I should be ok to go?
I'm pulling an unkown mileage LT1 out of a 9C1, swapping in a hotcam/springs/rr's and spraying it.
I'd love to get greedy on the second stage but not if I can only get away with it a couple times. Granted I'll probably only make 4 or 5 runs a season (if that) balls out but it would be nice to get a couple summers out of it.
What's the concensus from those who have "been there, done that"?

[jakesz28]

300 on a stock motor. I would try it if I had plans for a rebuild but if it lets go at the big end it can get ugly.

[bottledbird68]

300 on a stock motor. I would try it if I had plans for a rebuild but if it lets go at the big end it can get ugly.

No, not 300 on a stock motor, the first stage turns off when the second stage comes on, so, only 200 total.
I know better than to try for 300 on a stock bottom end.

[justanlt1]

i have 175 on a 160k stock motor and its still running strong after 35 bottles :metal:

[Code-3]

Spray it!!!! you will love the hell out of it till it blows up, but then you can rebuild the motor for nitrous..look on the brightside! lol

[Code-3]

i have 175 on a 160k stock motor and its still running strong after 35 bottles :metal:

i like your style!

[roadtrip120]

i have 175 on a 160k stock motor and its still running strong after 35 bottles :metal:


are you running a progressive controller or anything? A friend of mine is worried about a 100 shot on top of a heads/cam stock bottom end setup.

[jakesz28]

are you running a progressive controller or anything? A friend of mine is worried about a 100 shot on top of a heads/cam stock bottom end setup.




On my original motor I sprayed a bunch of bottles thru it. About 3 years or close to it. At first on the stock cam then I put a cc306 in it and was shifting at 6500. Towards the end of the year it was getting a 200hp shot right out of the hole. It took it fine. The motor is still running. I would say pulling a little extra timing and running the right plugs saved it.

[Grant@nitrodaves]

The Walbro 255 without Racetronix Hotwire Harness is supposed to be good to about 550hp and with Hotwire 630-650hp. The ZEX limits nitrous flow by solenoids not being able to open past 1000-1100psi. sounds like a solenoid limit not safety precaution. I personally inspected a ZEX NMU last week for the first time and wasnt too excited by what i saw. I should have taken pictures but since i work for a nitrous company thats probably a no-no.:whistle:

[justanlt1]

nope just stock everything fuel and timming wise but if you think you have to much timming in it just put some 110 in it and it will last i did it to a friends camaro with a plate kit and a 255 pump with stock injectors and a 250 shot on a 130k short block and man that was a fun weekend but them i run my stuff a little on the rich side on anything over 150

[9730thSS]

You can do 300+HP shots of nitriuos on stock blocks, I'm doing it right now. It's all in the way the system is set-up. Set it up like manifold fogger system, do stochimetric calculations on how much fuel to nitrious size orifices you need inside manifold and hook them to a pair soleniods. Take the fuel from right side of the fuel system(long discussion) and you will not need to jet the system, change out fuel injectors , but you do need to change the stock fuel pump out. I've gotten several test runs out of the system and the only thing we seen is we needed a bigger intank pump, so in goes walbro 255LPH. I'm at a disadvantage because I race in Denver, CO, so we have to make more power to even come to run the same times many you run at lower elevations...So, yes it can be done.

[gregrob]

Where do you live 30th? I race at bandi too and will be starting w a 150 shot and maybe working my way up to a 200 on a stock shortblock + cam, to help make up for some of this retarded thin air and nasty DA we have to work with.

What's your car look like? My buddy said he saw a nasty nitrous fed lt running 9's this last wknd down at bandi.

[9730thSS]

Unfortunately, I was up there last weekend, but that was not me that was a kid named Joey, and I believe he changed out to a SBC. I'm still stuck back in the 11's, my computer has decided to block learn again and go to 47degrees of timing at WOT, so I'm losing about 6-7mph on the big end....

[pyro719]

Joey is still running an lt1 but with a carb and dizzy. Quick car though! runs low 9's, I have his hood on my car:D