Alright guys, this is what a eta bottom end and i head gets you.

[SHADYB]

Help!

We've swapped in an I head onto an 86' eta bottom end. We're using an I wiring harness and have a 173, 153, and a 525 ECU's. None will give us spark at the coil. The motor will attempt to crank but won't fire.

We've verified that the coil, CPS, ECU's, and spark reference sensors work on other I cars. What could be causing our no spark situation?

[yberther]

The best (most simple) way to go is just to boost a stock b25i motor and use Megasquirt for management. A friend of mine is making 430 horses at the flywheel with this setup. Stock 180k+ motor with the stock head gasket running 21 psi iirc.

that's impressive, what size turbo? exhaust? injectors/pump?

[rThor432]

So if I was to go boost on this this set up. The best way to go would be the eta bottom end with regular eta pistons, IS head/intake mani/tb, good after market head gasket, and better head studs.

The best (most simple) way to go is just to boost a stock b25i motor and use Megasquirt for management. A friend of mine is making 430 horses at the flywheel with this setup. Stock 180k+ motor with the stock head gasket running 21 psi iirc.

[88driftIS]

So if I was to go boost on this this set up. The best way to go would be the eta bottom end with regular eta pistons, IS head/intake mani/tb, good after market head gasket, and better head studs. Then for tuning, both an fmu and Mega squirt? And the Mega squirt gets rid of the afm? What is the compression difference between the seta piston set up and the eta set up

Sorry for the questions, I am really trying to learn as much as I can about this since I getting an 86 eta here shortly. And I haven't dealt with anyting but Honda's till now. Now if you needed to know anything about a turboing and tuning a honda, that's a different story.

[Aveman]

i am planning on doing the same thing i have just bought a I head and my block is Eta... is there any other specifications, or is it just a direct bolt on the the bottom end. If it is different please let me know !!!

The head will bolt up, the main thing you have to figure out is how you plan on running it. I think it's probably better to run Megasquirt vs trying to swap in a "i" harness. The only difference between my setup and yours will be I'm running a m21 forged crank which is heavier and a single mass flywheel from a "i". I would plan on atleast finding a "i" exhaust as the eta exhaust will be too restrictive. Also you need to use a "i" intake manifold and throttle body.

[Aveman]

I'd guess about 160-165whp with the "seta" setup, still using motronic.

Yeah I'd guess around 160 WHP.

[Aveman]

So what's the advantage of welding the block of head?

Less chance of head gasket slip under boost.

[ClassicScot]

i am planning on doing the same thing i have just bought a I head and my block is Eta... is there any other specifications, or is it just a direct bolt on the the bottom end. If it is different please let me know !!!

[e30esque]

Members ride thread please. Since youre from Rochester, I need to see.

Will do. Car is in Suffern, NY which is about 5 hours from Rochester. Going to school here at RIT and the motor was just finished last break. Hopefully i'll be able to bring it up after March. I do have some old pics from last year though, so I'll put those up. (sorry to threadjack, continue with stroker discussion!)

[nando]

I'd guess about 160-165whp with the "seta" setup, still using motronic.

[bwanac]

Same sentiment! I have basically the exact same set up (eta w/ SETA pistons, bran-d new spanish 885 casting, I cam), but with 24 lb injectors and a Cartech billet rrfpr (so I can give it less fuel pressure rather than more) I'm currently running a little lean (iirc 14.0 AFR at WOT). So any guesses as to what my car is making?

P.S. Second post!

Members ride thread please. Since youre from Rochester, I need to see.

[e30esque]

If I read this correctly, the original poster used non-super eta pistons. For someone who already has an "I" engine (like me), but does not want aftermarket pistons, has anyone dynoed an M20 with super eta pistons, "I" head and cam, eta or turbo crank, M30 AFM, adj FPR and M50 injectors?

Same sentiment! I have basically the exact same set up (eta w/ SETA pistons, bran-d new spanish 885 casting, I cam), but with 24 lb injectors and a Cartech billet rrfpr (so I can give it less fuel pressure rather than more) I'm currently running a little lean (iirc 14.0 AFR at WOT). So any guesses as to what my car is making?

P.S. Second post!

So what's the advantage of welding the block of head?

[rThor432]

they have their charm :-P

But you still need euro bumpers. They have charm too.

[JAM]

i have a super eta bottomend with an i head, it runs like crap on the stock ignition system, i have megasquirt here and am planning on installing it over winter, good to read that it showed some gains for people

jam