What is the largest safe nitrous shot for a stock internals 1G non-turbo 4G63? I have been reading on this & I keep seeing a 25 shot should be safe. Any one have any personal experience, good or bad, please post.

Later,
Andy

35 shot is safe. 50 can be, but I wouldnt reccommend it often. Go w/a 35 and it will be safe to run...

94eclipsegs said:

What is the largest safe nitrous shot for a stock internals 1G non-turbo 4G63? I have been reading on this & I keep seeing a 25 shot should be safe. Any one have any personal experience, good or bad, please post.

Later,
Andy

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you should do 2 things. one, post this in the nitrous forum(thats where all the experts are, not here) and 2, unless you have a 94 GSX which im guessing you dont since your name is 94 GS, change your profile too.

i dont know what your engines can handle but 35 seems pretty weak. there are guys with the 420a running 75 on stock motors. but thats the 420a. i dunno how yours are

What is the largest safe nitrous shot for a stock internals 1G non-turbo 4G63? I have been reading on this & I keep seeing a 25 shot should be safe. Any one have any personal experience, good or bad, please post.

Later,
Andy

you could do a 50 shot easly. probly could even pull off a 75. just make sure you use a cold copper plug

75 has seem to be the common "safe" limit.

Buy an NX EFI stage one Kit. It's a wet kit which is the safest and best HP producing kit to go with (dry is not safest contrary to popular belief ie.ZEX advertising). It comes with jetting for 35, 50 and 75hp levels. Starting with the 35hp jets you will feel a huge improvement in HP and going up from there.

If your car is in descent running condition it will easily take 20hp per cylinder in nitrous on full stock equipment. This is even possible on the stock pump because wet kits run on stock fuel pressure. Dry kits pump up fuel pressure to add the extra fuel in, this is where stock fuel pumps choke and guys blow up motors. I would always recommend a Walbro 190lph fuel pump upgrade just to be safe. The 190lph will not need an AFPR either.

A side not to other who may be reading this later on (or now for that matter) dry kits like ZEX are not any safer than any other nitrous kit. In my opinion dry kits are more dangerous because they pump up fuel pressure to compensate for the added nitrous to pretty high levels. Stock fuel injectors on a non-turbo car like to take a shit when they are forced to deal with really high fuel pressure like that. I ran into injector problems on my VR6 constantly because of my dry kit before I figured out what what happening. Switching to a wet kit was the best thing I ever did. The same 75hp shot took an additional half second off my 1/4 time. I have been there done that with dry kits, they simply are not worth the money, not safe like they claim, and not easier to install. There is simply no benefit at all except lower than claimed HP.

Feel free to argue but I have had them all and taken them all to the track. Where HP counts, wet rules.

gotta agree with jim. the dry kits are worth a damn. go ahead and spend a little more and get the wet kit. not only is it safer, but it is more leathal. a 50 wet and a 50 dry is like night and day. i got a nx single nozzle efi system on my 00 eclipse. nx has the most time and research put into there systems. if it say a 50 shot you are gonna get a 50 shot

Just incase your interested in seeing the guts of a Zex box... Boy does that look safe or what?

Looks like a Zex wet kit w/ a 75 shot is the way to go. Time to start shoppin'.


Later & Thanks,
Andy

if a 50 to 75 shot of nitrous is safe a non turbo 4g63 engine, wat would be the safe zone on 2g 4g63 turbo engine? thanks

Depends on how much boost you run. Boost pressure will jump once you spray because it's an instant turbo spooler. If your running 20psi, then it will become 23psi and that 35hp shot will add 75hp because of the cooling effect. SO make sure your motor can take 23psi and 75hp additional from nitrous. Chances are on a stock motor this is not going to happen unless your on race gas.

On the turbo motor it's pretty hard to spray with pump gas unless you run 15psi of boost which works but will not give you much of a power jump (well it will just not like 23psi and spray will ..)

Also make sure you get the proper jetting because your nitrous kit on a turbo car uses different jets then a NA car does. Remember higher fuel pressure, and your intake is pressurized at 20psi so your fuel has to fight against that pressure to spray in so jetting is totally different.

well i want some horsepower, and it would cost a lot more than a small nitrous system to get the same power that it gives, ive been reading on here that something small like 50 shot isnt harmful to stock internals, is this true?

Use a Zex kit , a wet one .

make sure your timing is set for nitrous , and NEVER run more than a 50 on your stock block, you could do more , but , to be on the safe side do 50.


nitrous is only safe when used and tuned properly.
remember that.

50 shot is safe on stock internals just dont be playing around with it im setting up my nx kit in my car

I need some info about nitrous and putting it onto a 4g63. Is this pretty safe or unsafe? What would I all need to get in order to run spray on my car? What kinds of custom fabrications are required?
Would I need to upgrade my pistons, rings, cams, fuel etc...to run nitrous?
Which setup is better? Dry or wet?

I'm not sure if I should do this or not so I need some input. I'd be running it on a 16g. Thanks in advance

-DSM2NR- said:

I need some info about nitrous and putting it onto a 4g63. Is this pretty safe or unsafe? What would I all need to get in order to run spray on my car? What kinds of custom fabrications are required?
Would I need to upgrade my pistons, rings, cams, fuel etc...to run nitrous?
Which setup is better? Dry or wet?

I'm not sure if I should do this or not so I need some input. I'd be running it on a 16g. Thanks in advance

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On a STOCK CAR:
Yes it is safe to run nitrous on a 4G63.
You will need a Wet kit for a turbo car, all companies do not recommend a dry kit for a turbo car. Zex makes a wet kit that changes the amount of nitrous based on bottle pressure, this is the safest kit out on the market.
You do not need to upgrade anything. Nitrous kits made for Turbo Eclipses and Talons are made for stock cars.

By 16G I'm assuming you mean a EVO III 16G turbo. Running nitrous on a 16G will make the turbo spin like crazy and eventually cause damage to the turbo, depending on the amount of boost you are running. If you want to use a 75 shot of nitrous and use the 16G to 20+ psi, then you need forged internals, some people say you can get buy with tuning. I don't see how when it is over 400HP at the crank. You will need fuel upgrades with the 16G anyways, with a wet kit you don't need to have any other fuel mods.

I hope this helped and didn't confuse you. I read the 16G part after I typed the first paragraph.

Thanks for the help. The 16g is actually a regular one (not a EVOIII). I dont' really plan on running more than 17psi on it (with a Walbro190 fuel pump of course). So what you're saying is that it will mess up the turbo? And I should only consider a wet kit, so a dry kit is out of the question?

-DSM2NR- said:

Thanks for the help. The 16g is actually a regular one (not a EVOIII). I dont' really plan on running more than 17psi on it (with a Walbro190 fuel pump of course). So what you're saying is that it will mess up the turbo? And I should only consider a wet kit, so a dry kit is out of the question?

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Yes, only consider a wet kit with a turbo kit. Some info here: http://www.dsmtuners.com/forums/showthread.php?t=220185

As for damaging the turbo, check out post 13 on this thread:
http://www.dsmtuners.com/forums/showthread.php?t=222189

I've went through about 5 bottles now running a Zex wet 75 shot with a FP ported B28 turbo @ 22 psi while spraying, HKS cams, 550's etc. for about a year and a half now with no problems what so ever. Just make sure that you have your shit hooked up right, and you have the proper supporting mods and logging equipment, and you should be just fine.

DGajre777 said:

By 16G I'm assuming you mean a EVO III 16G turbo. Running nitrous on a 16G will make the turbo spin like crazy and eventually cause damage to the turbo, depending on the amount of boost you are running. If you want to use a 75 shot of nitrous and use the 16G to 20+ psi, then you need forged internals, some people say you can get buy with tuning. I don't see how when it is over 400HP at the crank. You will need fuel upgrades with the 16G anyways, with a wet kit you don't need to have any other fuel mods.

I hope this helped and didn't confuse you. I read the 16G part after I typed the first paragraph.

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20 psi and a 75 shot isn't a big deal if it's tuned properly. I've done that on pump gas, actually it was 22 psi and a 75 shot. It does depend a lot on the turbo. 400 crank hp isn't a lot for a 4g63, they've been taken over 550whp on completely stock bottom ends.

GVR4592 said:

20 psi and a 75 shot isn't a big deal if it's tuned properly. I've done that on pump gas, actually it was 22 psi and a 75 shot. It does depend a lot on the turbo. 400 crank hp isn't a lot for a 4g63, they've been taken over 550whp on completely stock bottom ends.

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Which turbo did you boost to 22psi and add a 75shot? There is big difference between a T28, an EVO III or a 50 trim.

Do you have any dyno sheets with a mod list for these 550whp stock bottom end engines? And I'm talking about 2Gs not 1G engines.

Yeah... to me 550 whp seems a little bit high on a 2g. I've always thought that 450 whp was about the max on a 2g with stock internals.

The turbo was a greddy 18g. I was referring to 1g engine's.

GVR4592 said:

The turbo was a greddy 18g. I was referring to 1g engine's.

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The 1G engines are a lot stronger than the 2G engine. This is why you see 2G guys installing 1G rods or getting 6 bolt swaps. Now if the original poster was going to get a 6 bolt and then adding nitrous to it, that would be a different story.

FYI - I have seen one dyno sheet of a GST (GreddyGST, I think) running 404whp.