can i put an I head on my non super eta without modifying the pistons or head?

[M-technik-3]

What did we learn? MR 325 is always right! And that dyno graph is awesome.

Just a suggestion, you might want to get an i cluster as well, unless you enjoy reading 5k when you are really doing 7.5k.

What you learned was many of us old hats knew that. It was a very comical entertaining thread full of a bunch of BS. I am surprised the Search Button wasn't suggested as this is in the faq section.

[acolella76]

Alex thank you for posting that. Maybe people can finally believe the info I give out? lol

One can only hope!

Nice job Alex. I will say that your motor is crazy strong for a 2.7. I'm coming over and stealing it.

As long as you leave a new one thats fine with me! :)

the stock b25 has very low compression already so any amount lower is a step backwards but it is not the reason why the 2.7I don't make more power than stock. It is the fact that most don't upgrade the breathing and the engine falls on its face. You have put a cam and headers which is the correct way to get more power from the bigger bottom end but have only made slightly more than stock and i have seen healthy B25 make more than this. Sure a custom tune will help but it does on a stock B25 aswell. Camming the low compression engine compounds the problem of low static CR and it hurts the low rpm performance. You need more compression to use the bugger cam more efficintly. I would be doing a fresh stock B25 before any of this budget 2.7i stuff and then a 2.7/2.8 with moderate CR.

I have not seen anyone really do a 2.7 with ETA crank, B25 Piston, B25 rod and deck 2mm off the top and use a cam gear and at the same time a refresh bottom end and topend.

For you guys its harder to do the 2.8 because your cranks seem to create fouling with the block and pistons which is a PITA to modify.

I agree with everything you're saying. For NA there ARE better options, but if you already have an eta block and just want to wake the engine up, this is great. If I had to start with a 2.5 there's no way I'd go through all the effort of putting this block in. You gotta remember the people considering this 2.7i isn't because they want a high compression screamer... they either want a good boosted setup or they want more power than the stock eta for cheaper than building a whole new engine.

I'm really only using this bottom end to get set up for boost, then once I am boosted I'll be building a 2.8L using m52 crank, eta rods, and B25 pistons.

So like I said I didn't build this cause I wanted a super fast N/A motor, I just wanted a way to really wake the eta up on a budget. I am still happy with the results though :)

[Cronopoulos]

One can only hope!



As long as you leave a new one thats fine with me! :)



I agree with everything you're saying. For NA there ARE better options, but if you already have an eta block and just want to wake the engine up, this is great. If I had to start with a 2.5 there's no way I'd go through all the effort of putting this block in. You gotta remember the people considering this 2.7i isn't because they want a high compression screamer... they either want a good boosted setup or they want more power than the stock eta for cheaper than building a whole new engine.

I'm really only using this bottom end to get set up for boost, then once I am boosted I'll be building a 2.8L using m52 crank, eta rods, and B25 pistons.

So like I said I didn't build this cause I wanted a super fast N/A motor, I just wanted a way to really wake the eta up on a budget. I am still happy with the results though :)

This is the exact reasoning behind why I am putting together the "budget stroker."

[digger]

One can only hope!



As long as you leave a new one thats fine with me! :)



I agree with everything you're saying. For NA there ARE better options, but if you already have an eta block and just want to wake the engine up, this is great. If I had to start with a 2.5 there's no way I'd go through all the effort of putting this block in. You gotta remember the people considering this 2.7i isn't because they want a high compression screamer... they either want a good boosted setup or they want more power than the stock eta for cheaper than building a whole new engine.

I'm really only using this bottom end to get set up for boost, then once I am boosted I'll be building a 2.8L using m52 crank, eta rods, and B25 pistons.

So like I said I didn't build this cause I wanted a super fast N/A motor, I just wanted a way to really wake the eta up on a budget. I am still happy with the results though :)

if starting with an ETA there is nothing you could do to step in the wrong direction....lol

if starting with a B25 then a refresh would be the better option. Next step would be stroker matching the piston and head combo with decent CR a mild cam, nice exhaust and tune and you are making a nice M20. Above that i'd be doing bigger stroker and custom pistons etc etc....

[MR 325]

What did we learn? MR 325 is always right! And that dyno graph is awesome.

Just a suggestion, you might want to get an i cluster as well, unless you enjoy reading 5k when you are really doing 7.5k.

Sig worthy, lol.

[The Humjet]

Lol reading this thread shaking my head. It seems like there's more keyboard warriors on this forum than we think.

[Simontibbett]

I'm impressed with the dyno sheet and info.

Maybe I'll have to follow in these footsteps.