jdm12a

ive been reading alot lately about ppl turboing there n/a with the stock t2 setup, and i was wondering if anyone had made one that really lasted cuz everything ive read they died shortly after they were boosted, so i was wondering how reliable they really are, if anyone has had one last succesfully

iceblue

If built properly just as reliable as every other properly built motor.



If done by a kid with no money and read a few posts on a tired motor it will blow.



I have a customer with 25k now on one. Pushing 16psi on 93octane with a T04E

jdm12a

was he using the stock na rotors on it? what ecu?

KompressorLOgic

yeah ive done NA turbo before,

i turboed my NA s4 block and it had close to 200K miles on it haha it held up to about 6 months of abuse, and dynoed 231HP@ the wheels on 10 psi on the stock s5 turbocharger.



Before anyone tries to flame me, i was expecting the motor to blow up,i mainly did this becuase it seemed to controvercial and i wanted to see what kind of power could be had, i figured it would only last a few weeks with soo many miles on it, but it lasted must longer then i expected.



it can be really reliable, however u have to look at what your starting with.



starting with a high milage motor and its not gonna last a long time cause ***** just to worn out to begin with.



i did it again tho haha and im using another high milage motor i had laying around might as well get a lil fun out of it while im building a strong motor!

iceblue

Yes rebuilt by me with my routine mods all motors receive prior to the new updates of coatings they all receive now. It was a S4 NA motor na rotors and all. He is running a SAFC with 7 degrees of retard. He was to broke after to get a standalone so I am waiting on that but he still drives the **** out of it.

CGeek2k

Preface: I have no hands on experience with this setup.



I would think that the most important part is the fuel/ignition control and boost level. A 9:1 compression engine boosting 15PSI is seeing the same chamber pressures as a 9.7:1 engine boosting 12 PSI. Theoretically, if you have the same mods as an upgraded turbo engine, but you run a bit less boost, it should work out the same. You just need to find a turbo that is more efficient at lower pressure ratios. As for using a stock turbo, I dont really know. I'd like to see a compressor map for it though.



I am interesed to see what people have to say on the subject as I am looking into this type of setup also.

j9fd3s

we have crappy gas in CA, but id have no problem throwing a turbo onto an S4 engine, id want to use a full t4 and not a stock turbo... larger injectors, super afc.... standalone if its in the budget



9.7:1 is a little high, not saying its not doable, its just a little trickier

CGeek2k

Yeah, I was thinking only around 8-10lbs boost but I cant find a turbo thats efficient around that range. I've also been looking into Wolf and Haltech ECUs but boy, are they pricey.



I'll probably be researching for 6 months before I start doing anything though, just because I'm a nerd like that.

j9fd3s

well research this, corky bell had turbo kits in the 80's, they used a cast iron manifold that fits with the actuators and stuff, and a 60-1 t04. they used the rising rate fuel pressure reulator for fuel, and the 1st gen kits got a front mount, the fc's got a water to air unit. 3" exhaust....



fc kit made 231hp... running 8ish psi

iceblue

You are absolutely correct my friend, sadly very few people can look at this. Few people understand an amount of positive chamber pressure = the same power. Just with higher comp setup you can spool the turbo faster and get there sooner. Too many people are stuck on a boost gauge number = hp instead of chamber pressure and charge temps.



Ask and you shall receive.