how much boost have you had sucess with on N/T engine?

[Below Ambient]

So far I've heard of a few sucess stories regarding turbocharging your N/T engine and from what I have acknowledged 8-10lbs of boost is about the max... so what i would like to know is how much boost is ok when you are using the 9:1 N/T engine? please respond with your setups if possible...

im still reluctant to turbo my own N/T mostly because its my daily driver.. I am thinking more of just buying a beater, pulling the shortblock and putting in some machined turbo rods with some 95 pistons just to save the headache of broken ring lands...

thanks, and i apologize if this question has been asked before...

 

[Blueheat23]

When using the stock cast iron 9:1 NT pistons, 8-10lbs of boost is prolly as far as you should push it. As far as the daily driver thing, you can turbocharge your NT and keep it a daily driver for quite some time...you just need the right supporting mods. T.S.I actually makes a great turbo kit for our NT's at a realitively fair price (compared to the HAHN or STAR 2nd gen kits). It comes in two stages, the first being 1700.00 I think and the 2nd 2500.00.... here's a link if you want to check it out.

Turbo Kits..

Stage two comes with what looks to be one hell of a FMIC as well as everything you would need to successfully run 6-8lbs of boost as a daily driver. Throw in some forged pistons, turbo cams, turbo CAS, a better than stock clutch (ACT 2100 for example), and a walbro 190 fuel pump (even a stock turbo fuel pump) and your ready to throw down some serious boost...and damn reliably at this point...on that NT of yours. Then again to do all of that the right way can cost upwards of 3500-4000 dollars. Then there is also labor if you don't plan on doing the install yourself.

You could also go the much cheaper route and become a turbo parts scavenger until you eventually have enough to slap a turbo on the NT. This method is long/painstaking/arduous/you name it...(I know because I went down this road only to have my car turboed for about a month before stuff started going wrong and I had to convert back to NT.) This route, if not done correctly, can lead to devastating results and a lot of thrown tools...(i broke 5 socket wrenches... )

So in the end, if done absolutely correctly (either from a store bought kit or a junkyard kit) turboing your NT can yeild a lot of good results as well as a, now, much faster reliable daily driver. On the other hand, if corners are cut or things slightly marred in any way...the trip can be very dissapointing. Good luck with whatever you decide!

 

[Below Ambient]

Well so far all I need is an exhaust housing, O2 sensor housing, and a oil pan... all else is accounted for.. the reason i ask is that a friend of mine who is running 11's now (bastard) had an N/T a long time ago and swore up and down that I could run a turbo 14B setup with no turbo ECU, stock injectors, at 8 lbs, and itll run 14's with no problems at all... I'm willing to believe him on the setup, but since I'll be attending college again this spring, and my N/T is a daily driver am I asking to much of my N/T pistons to withstand 8 PSI so long as I run 91 octane gas? I'm not asking for 14 sec timeslips, just some good advice on how to grab a bit more power out of my engine without blowing it up...

ty for the info, and again i apologize if this topic has been beaten to death!..

 

[trbotalon93]

i got a turbo oil pan(i was gonna do a N/T-Turbo, but then got my a whole new turbo motor )

 

[BacknBlack92ESi]

With my Big16G I run 10lbs for daily driving. And when I want to race or feel I want to turn it up, I set it to 12lbs. Im still on the N/T pistons and I havnt had any problems with them yet. But now one of my 450's is shorting out so its only running on 3 injectors which is not good. I might be getting some 550's. But I really dont know what I want to do at this point with my car.

 

[supergoat]

I change my boost setting all the damn time. But for the most it sits pretty at 10-11psi. It has seen regular use at 13psi though with no troubles at all.

And the other day, for shits and giggles because I was bored, I logged my car at 18psi and everything was fine. And just to clarify, I worked my way up to 18, little by little. But I didn't go any higher.

Not saying you should stick your boost controller to 18 and call it a day, I was just messing around for a bit to see what would happen. It held. I checked compression when I was done and it was still spot on. However, being cast iron, they'll break. So don't ever do what I did.

This is on a ported 14B turbo by the way.

 

[Blueheat23]

18psi is some bitchin' boost for those stock cast pistons. That also proves how much it really varies, cuz if my car (when it was turbo'ed) ever saw past 11psi, it would start knocking like crazy and id back the boost way the hell down to 5 or 6 psi (By way of the wastegate actuator...that was a bi*** to do in the middle of traffic on the side of the road). I was gonna go with an all motor setup after my failed experience with turbo, but i realized that if i put the same amount of money into a new turbo set up as i would an all motor set up, and do it right, that ill be much happier. Im actually planning on buying that stage 2 kit that i linked here earlier along with a few other supporting mods as soon as i get enough money together, so we'll see how that goes...Im not giving up on this conversion yet!

 

[BacknBlack92ESi]

Damm Stephen 18lbs! I would never do that. I was scared to go to 12 the first time. Well after a couple monthes of boosting I think its taking wear alot. My clutch is all screwed. I have no 1st or 2nd gear. I tore apart my tranny the other day and took out my clutch. And again, another clutch spring has broke. That is the second one. Plus 2nd and 3rd syncro's are toast. Not to mention the ass load of metal shavings inside the tranny. And somehow at the top of my bell housing there is a small crack. What luck I have latly. I just cant wait until I find something else wrong.

 

[supergoat]

Yea my tranny hates me. Since adding the turbo, of course my clutch is gone. But my 2nd gear synchro is going now too. Luckily I have a spare tranny and clutch. I just have to swap them in. Damn I'm lazy.

 

[mavisky]

Originally posted by BacknBlack92ESi
Damm Stephen 18lbs! I would never do that. I was scared to go to 12 the first time. Well after a couple monthes of boosting I think its taking wear alot. My clutch is all screwed. I have no 1st or 2nd gear. I tore apart my tranny the other day and took out my clutch. And again, another clutch spring has broke. That is the second one. Plus 2nd and 3rd syncro's are toast. Not to mention the ass load of metal shavings inside the tranny. And somehow at the top of my bell housing there is a small crack. What luck I have latly. I just cant wait until I find something else wrong.

are you still using a stock nt clutch?? the stock clutch won't hardly hold standard nt mods. its a totaly ####y. my nt clutch slipped the first day i had the turbo motor running at 10psi (on low comp turbo pistons) and it was a newer replacement.

 

[BacknBlack92ESi]

No, Before the turbo I had Spec Stage II clutch. It was still in there. And now it finally went.

 

[mavisky]

Originally posted by BacknBlack92ESi
No, Before the turbo I had Spec Stage II clutch. It was still in there. And now it finally went.

who makes that thing??

 

[BacknBlack92ESi]

Spec. Thats the name. Ads been in SCC an Import Tuner a couple times. Just not very popular. Probally one reason why its already gone. Oh well.

 

[mavisky]

Stage 2 - Clutch Kit w/ Kevlar Street Disc 280 lb-ft SM512 $ 319.95

if that's the one you had then its a totally overrated #### or you are pushing monster power levels out of that nt engine.

 

[Ice03]

After reading your interesting information I read that you cannot boost more than 10 psi on stock nt pistons, but lets say I were to replace them with turbo ones and the head with hks cams. Will I be able to up the boost to let's say 13-16 for daily driven and 18-22psi for racing? Oh and other things I have been reading about were the oil squiters on the block are these going to be a problem or are they kinda useless? Oh and the reason i'm asking is because my gsx engine gave up on me and i have a new nt one to work with so i'll be swapping parts from one to another and I bought a fp green with all the neccessary's durin the holidays and really want to use it for this summer. so I really want to know what I have to do to prep up the nt motor to handle this.

thanks

 

[mavisky]

the turbo pistons will fit on nt rods, at which point your rotating assembly (crank, rods, pistons) will be identical to the block that came in your gsx minus the oil squirters. some people say you don't need them. others say that you only need them if you're running factory style pistons (non-forged) and other yet still say you need them no matter what. its up to you to choose who you believe i guess.