You're missing the point apparently, we're not talking about how much you are running.

 

I should've been more clear by specifying my statement applied to stock internals, which is what most of the turbo Lancers are running. Even I know better than to make a n00b statement that brash...

 

Well the main risk is some noob skimming and then getting it through his thick skull that he can run 20 PSI with a stock block.

 

people dont take into account cyl pressures. Dont want to melt pistons or snap rods due to a good tq spike.

With proper boost control, not a pos ball and spring off ebay, you have nothing to worry about. Adding another few 100rpms in lag for no reason is just killing the point of having a small turbo. Might as well add in a larger turbo and have it spool faster.

 

Car is runing and is going to racetech for tuning all day and then to the track on friday for sum numbers right now i am at 8psi and it pulls hard alot harder than i thought it would for a untuned car but the real treat will be seeing how hard it pulls after the tune i never took it pass 4000rpm i didnt wanna blow it up, I hope i will have some numbers to post up here soon

 

Good deal looking forward to seeing your numbers man

 

Ok so i blew up my first turbo! i probably should of never put it in, it was a 3hand one from my friend i bought for cheap and i have since learned my lesson on buying used turbo's haha. So i bought another one and this one is ported so that make me happy and it has been in the car for 3days now and has not blown up lol so that makes me really happy anyways i just got my new 4th injector back (the first one was ****d) and will be installing them 2mr. I hope'n wed it will go on the dyno for top end and fine tuning (i hope) cause i really want to take it to the track on friday. There is still a few things i have to get done b4 it go's on the dyno we are having Detonation issues so racetech is installing a knock sensor and im told once its fine tuned i will not have to worry about it. Because so much of you guys already have your cars done and tuned and have been boosting for a while now I have some questions that would just be great if i could have sum answers for

1) head gasket - what kind of boost are the stock ones good for? And where can i find a metal one? (I plan on upgrading just not right now as i am running low on coin!
2)boost?- I have notice depending on who you talk to o this site the stock 4g94 can handle anywhere from 5-12psi all day unless your just beating on itthen my guess is the motor wont last long at all
3)RPM MAX- i bought a new 4g94 and swapd it in b4 i started this build so its fresh i know they redline at 6000rpm but what about when its turboed is it safe to take it to 6000rpm i just dont wanna blow this engine up(also i know it depends on the tune keep in mind i have a full standalone that will be fine tuned so a good tuned is what it will have

I think that is it thx to all that reply it is gonna help me out alot and i will not be shy with pic's and track num's once i get this monster boosting properly

 

If you're blowing turbos, having fueling issues and detonation problems, run a small amount of boost, say 6 PSI. Once everything is sorted out, you can consider raising it. You can take the car to 6000 RPM assuming it's properly tuned.

 

Here's my input...

 

thx again everyone for your imput its great to be able to ask questions and have people answer them properly for me

 

I love how you talk about tq breaking stuff which is true, but then limit the engine to 230-250whp

Also, the valve springs and retainers will determine how high the engine can rev, not if the internals are forged or not.

 

I'm putting up a roundabout number in the air (230-250whp) because this is what both RPW and RRM have stated. I agree with them. Not only that, people on this forum don't seem to be satisfied without a real number or range to hold onto. Also, you don't see any Lancers running 250whp daily on stock motor. The rods will not hold.

And if you read what I said again, my statement about revving that high makes sense. With piston speeds that begin to exceed 23m/sec over 7200rpm, upgraded springs and retainers can only do so much.

 

I thought the stroke has alot to do with our rev limilt too or am I mistaken Dont our engines have a longer stroke than say the evos giving them a higher rev limit (along with other factors of course)

 

Basically yes. Compare an S2000 to a Viper, the former has a shorter stroke compared to the latter.

 

You are 100% correct. It's because of the 95.8mm stroke that our engines can only safely rev so high. The Evo is 85mm bore x 88mm stroke compared to our 81.5mm bore x 95.8mm stroke. This long stroke creates high piston speeds at higher RPM that run the risk of damaging both the rotating assembly and the valvetrain (even with forged internals and upgraded valvetrain).

However, looking at the glass half full, this long stroke creates more power, sooner, in the powerband. This gives faster spoolup for turbos, but tends to create more power than desired in the lower RPMs. The solution lies in cam choice and turbo selection. A higher flowing cam will make power all the way to redline and a slightly bigger turbo won't throw too much power down too quick to make the car unstreetable.