E31 w/ L28 block

[red_dog007]

So what would you suggest then?

L28 w/ E31 head that will have ported valves, and larger chamber to make up for machine work

or

L24 w/ E31 heat that will have ported valves and either a stage II or stage III cam?

I'm still having a hard time, and am going to try to get this engine in the shop within a week or two.

I think that I will go ahead and just stick with what I already got. Seems like it might also be a little cheaper too anyways and I could always get an L28 block later, or stroke my L24.

[mark belrose]

So what would you suggest then?

L28 w/ E31 head that will have ported valves, and larger chamber to make up for machine work

or

L24 w/ E31 heat that will have ported valves and either a stage II or stage III cam?

I'm still having a hard time, and am going to try to get this engine in the shop within a week or two.

I think that I will go ahead and just stick with what I already got. Seems like it might also be a little cheaper too anyways and I could always get an L28 block later, or stroke my L24.

Not trying to throw a wrench in your plans I agree with e_racer1999 that the most cost effective to build a nice motor is to obtain an old L28 block with flat top pistons for $100 and use something other an E31 head to bolt to it. A mild cam, minor porting and a header will do improve it even further, and you won't have to back your ignition timing or use race gas.

Enlarging chambers on an E31 is tricky work and best left to experts to maintain good flow and burn. It's not just a matter of going at it with a die grinder. Your other scenario of building a stroker could result in a very nice motor but be prohibitively expensive.

Just my .02 dollars

Mark

[red_dog007]

I had thought that E31's were supposed to be the shi/t, especially for the racing community from the research that I have done.

Is it because just to be street able it needs the chambers enlarged?

I think that I will just stick with my L24. Will be able to get everything set up faster. Guess that I will just do the valve job, and get a Stage II or III cam in there.

I have always liked the idea of an L24 stroker with the LD28 diesel crank. I know that it is supposed to be an extremely expensive route, but it is a route less taken which I like.

[red_dog007]

If I just decide to get a cam kit from thezstore, is there any machine work that still needs to be done, or am I able to just take everything off and install the cam kit without having to worry?

[mazingerz1976]

Hi guys, i´m thinking of modifying my engine a little bit, and add some more horses, and maybe reach 210-230 HP, i don´t know if I expect too much because I just want to do some minor work on the head(N42) like a minor porting and mill , also want to use flat pistons and improve the air filter and install a 2.5 in. header, the problem is that I don`t have any idea how much compresion should have this engine (L28-N42) and could reach with these modifications, I don´t want to exceed a CR of 9.5:1-10:1, due to the emissions laws here are very strict and I want my car street legal. I would like to hear some recomendations !!!

Also want to ask you guys, what includes a “cam kit”?, as you can see English is not my native language and sometimes there are some words or technical terms that I don’t fully understand.

Thank you guys in advance