questions about rebuilding E15 for turbo with E15ET and E16 parts

Tee Koo · Sep 10th, 2004, 05:29 AM

I bought an E15 engine and it has all the injection stuffs, intake manifold, wires and ECU from E15ET but no turbo etc. It has standard block and head. I'm going to turbocharge it and I'm hoping to get about 140-150hp with these things:

Garrett T2 (or T02) or IHI RHB5 (vl5 or vl7)
2,5 in. exhaust pipe
DIY exhaust manifold
E16 euro cam
E16 rods (or 3-4 standard head gaskets with E15 rods) for lower comp. ratio
E15 or E16 pistons (which are better?)
0,8-1,0bar of boost pressure
intercooler (15 x 15 x 2 in.)
right tuned fuel/air ratio and ignition timing

Could I manage to get even 140hp? And will it hold the 1,0 bar boost pressure?

BTW, what's the difference between Garrett T2 and T02?

B11sleeper · Sep 10th, 2004, 01:37 PM

is it an e15t block or an e15 block?
I think you'd want the e15 pistons. I don't know that you have to do much of anything special to run 1bar with good engine managment.

Crazy-Mart · Sep 10th, 2004, 02:29 PM

the e15 crank is the same as the E15t
the e16i rod are the same as the E15t rods
as for the piston... my guess there not the same ... youll want to buy those specific piston and fit them to E16 rods... after that you shouldnt get any problem running 14psi of boost ...as for the electronic capabilities of the E15et... i dont know much if they can stand the 1bar mark... i would upgrade the injector and get a decent fuel management unit

Tee Koo · Sep 10th, 2004, 03:08 PM

OK, I know that E15 pistons and E15ET pistons are different but are they same as in the E16?

And about the head, I heard that E15ET's exhaust valves are filled with natrium and the E15's valves are not. I also heard that the E15 valves would crack if the boost pressure is raised over 4,5 psi (now I remember to use imperial, not metric measures

), but if I use intercooler and lower compression ratio they wont crack even with 14psi.

The ECU is the northern europe ECU and I've heard from swedish E15ET tuners that the northern europe unit is better than the one that was in E15ET's that were sold in states. I'm not sure is this true, but they (swedish) have got 170hp in dynamometer with standard turbo and without intercooler and without even raising the fuel pressure. Actually, the only things that they have made to the engine is raising the boost pressure, better exhaust manifold, and 3 in. exhaust pipe. I'm not sure how much the boost pressure was (and when the engine broke

) but I think that I'm wanting to get a little bit more reliable engine and that's why I'm going to put the intercooler and not much boost pressure.

And about the E16 euro cam, how much more power (approx.) I can get with it, compared to E15's standard cam?

BTW, would the Garrett T03 be too big for this engine?

Crazy-Mart · Sep 11th, 2004, 02:01 AM

ok than.. yes probably the ecu from europe got way better (in a way) tuned for performance, (always keep in mind that europe got the less restrain from pollution control)... You might NEED the eurocam as its from europe and your ecu is more than probably used over there also ... i would do a little research as if they actually have this cam spec over there ... making sure you use the right ecu for your engine (reliability and performance wise

)

I dont know about the piston from the E15s they might be the same, but i doubt it with little search about replacement pistons you might get the answer (wich i dont have..)

as for a mild cam (euro) on a turbo engine is a must has it unluck the whole upper rpm range (wich is good to get a better turbo

) but its not much, from my experience it is still a very mild cam but well tuned

T03 ... IMO id would go with a T25, if you want nice spool up (3500rpm) and enough flow for 13-15psi day after day up till the redline

Lazarus_023 · Sep 11th, 2004, 03:58 AM

there are several combinations you could try, depending on what exactly you're trying to do. what is your target boost and compression ratio?

i have bumpity-ed some important threads for you to look through...
http://www.nissanforums.com/showthread.php?t=4820
http://www.nissanforums.com/showthread.php?t=35907

if you know how to calculate compression ratios, make a spreadsheet and run different combinations of rod/stroke/piston/head... find something that fits your needs. the only thing i would recommend is that you use the official turbo head, it is a heavier casting, and deals better with the excess heat/pressure w/o warping.

there is bore and stroke information in these threads, as well as connecting rod length data. keep in mind that ? means uncertainty, though.