Non-turbo turboed track time

[Thor06]

I think you need to do some reading before you even start to think about dumping money into that car. First off, as Garrett pointed out, PSI = pressure NOT airflow. Remember, pressure = heat and knock, airflow = power. Obviously, 25 psi on a t 25 is nothing like 25 psi on the GT35R I drove a couple weekends ago.

I dont remember, but I think the NT 1g's got the big rods too, so those should be good to 500 hp. The thing with NT stuff is for one, I dont think that headgasket is as heavy as the turbo one so if you are knocking you can kiss that bad boy good bye. I doubt those pistons are built to take the added cylinder pressure of boost. I wouldnt push them past 8-psi on those 9:1 pistons. Remember, with higher compression pistons, making power is going to happen at less pressure than on say 7.8:1 pistons (stock turbo 1g). Also, cams have nothing to do with the block internals. All cams are going to do is flow more air at lower boost levels.

Just read some actual writeups from knowledgable people and get an idea of what you are doing and conquer this in the summer or something. More than 10 PSI reguardless of the turbo is simply too much pressure IMO and any more than like 275 you might be putting those rods at risk if the 1g NT's didnt get the big rds. No offense, but judging by your posts you currently do not have the knowledge to pull of a successful NT to turbo swap.

[nates6969]

non taken however I have fully researched this gig and I do realize pressure (amount of force exerted over a unit of area) is not the same as air flow (a measured amount of volume per unit time). Im currently a mechanical engineering student and understand the concepts of fluid flow and pressure. When I posted about the cams, my concern is its going to allow TOO much flow causing an increasing volume of air in the cylinders. With this added volume, the air will become harder to compress, increasing the final compression before combustion to higher levels. Therefore if I continue to run a 10 psi intake track pressure, this pressure will remain constant however more air will be, in theory, entering the cylinders. This increased air volume mixed with a higher piston compression ratio will skyrocket the final compression creating a extremely large force when ignited. Im concerned this will ignite unevenly causing extreme engine detonation. However I believe when matched with the proper amounts of fuel and ignition timing, the pistons should be able to withstand the increased combustion pressures. Secondly I rebuilt the bottom end, decked the head, seated all the valves (plus 8 new exhaust valves), 30k miles ago. When it was rebuilt I threw a new felpro head gasket on it. not the best gasket but I have seen turbo cars run 30 pounds on these (final compression pressure at 10-15psi on 9:1CR is not even close to 30psi on 7:81CR pistons). The only reason I ask these questions is to find out more about the internals of the NT, its not like I have taken a NT piston and performed structural analysis on it and compared it to a turbo piston. I am only seeking answers to practical examples others may have already performed. If I didnt feel confident in what I am doing I would have just thrown a 4g63t in it a long time ago. I just want to see what these motors can handle before the grenade. Worse comes to worse it, I blow a piston and I drop in a turbo block while reusing all aftermarket supporting mods. Too many people on these forums think these motors can only handle 8psi, no offence, I believe this is definitely true when not tuned correctly. When I first did the swap I had no tuning (only stock turbo ECU) and was making knock at 8psi. Currently I have tuned the car for 12 with 0 knock and is running strong since.

[nates6969]

Looks like you have nothing to say... If I were you I wouldn't be saying shit if you have no credentials in saying it. You have no background in turbo conversions and by the look of your other threads; you’re no expert in forced induction systems either. However I did notice you seem to cut apart people, especially new members, quite easily because they are making a “stupid post” (GST converted to GSX thread). Ohh no, tough guy here! This guy was totally new and probably just didn’t know much about proper forum usage.

Also how do you qualify to tell me I can only run 10psi on my setup? Like I already specified, you have no experience in this matter and if you read the start of the thread, I was asking for feedback specifically from people who have made the conversion. If I wanted to get that bullshit response, I would of just searched the other 300 posts about conversions made by close minded and inexperienced individuals like yourself. I used to like this forum, but there’s too many people like you, playing the smart ass role, giving negative information instead of encouraging and helping people that just want some simple advice.

You’re a fucking douche….

[Thor06]

Wow, called out by a n00b.

You have no idea about these newbies from the mod point of veiw so dont even open your mouth about that. I am supposed to keep the forum in order and its frustrating as hell when the same few n00bs make horse shit posts in the wrong spots after having been told to read the rules numerous times.

I am far from being a wiseman when it comes to turbo systems, but I know more than you. Go ahead, ask me how I know. Try many hundreds of hours under the hood of a DSM and literally thousands of hours reading on them. I am not the one running around asking about how much "psi" his stock NT bottom end can handle without ever mentioning a turbo or support mods (which I hope you have, if not the fuel needed for the air flow at 10 pounds of boost on pretty much any turbo are exceeding your stock fuel system). Remember,in posting you asked for my advice, nates6969, and this "close minded and inexperienced" individual happens to have a different veiw point than you. Tough shit.

Think you're the only Mechanical Engineering major here? Well guess what, you arent and just because you are doesnt mean you know jack shit about turbo systems.

Why dont you take a couple days and chill the fuck out. When you come back, if I see shit like this again you will get a permanent one way ticket to Banlandia.