2g head ported to 1g

[1995gstdsm]

So when I first bough my 1995 Eclipse GST, it had spun the #1 rod bearing. Not a huge deal but long story short I figured this would be a good time to just pull the motor and do a fresh rebuild how I want. Well short block is complete - Jackson Auto Machine did my machine work, .020 over, wiseco 9:1, scat rods, eagle crank, acl main and rod bearings, arp studs.

Now came time for the head, I think I rushed into things because before researching and getting insight (especially on here) I sent it out to be ported/polished oversized valves, 5 angle job, etc..lots of goods. But im questioning myself now because I got the intake runners cnc'd to 1g size. And now I read all the info saying how the 2g flows better?
Basically just looking for opinions, insight, and if i wasted my money on the intake porting to 1g?
Thanks

 

[stukyl28]

I'm not expert on port and polishing, when I did my 2g head I just made sure all the runners were smooth and there was no casting flaws. You deff wasted money cause you could have just gotten a 1g head, and been at the same place you are not without spending money to have the p/p done. Everything else to upgrade the head was good tho.

 

[finesse49ers]

Hard to say if you wasted your money or not, in theory porting is a good thing. My questions are what turbo and intake manifold will you be using?

 

[1995gstdsm]

yea, thats what I was thinking . After I sent it out I was like dam it
why didnt i get a 1g head. Or just not port match a 1g style and stick with stock 2g size. ### im gonna be hitting the same power as alotta stock size guys on here. But oh well, live and learn

I havent decided on intake manifold, was thinking about that cast Magnus one. Or a nice smim from jmf, but not sure. And as for turbo, originally wanted some sort of t3 set up but still torn between that idea and a Forced Green/mitsubishi flange set up

 

[TopGun8818]

So according to your title you put a 2g head on a bottem end 1g 6bolt right? You don't specify in your explanation. If this is what you did; I myself did the same thing with my rebuild. I had just rebuilt the 2g head and then piston #3 decided to eject itself from the block (quite the sight and sound when you hear shards of iron flying on the freeway and cars swirving out of the way ). I didn't port the head though, my dsm mechanic Sean @ fftec decided to re-slot the head to fit a 1g 6 bolt of which he rebuilt with eagle rods and wiseco pistons. I don't believe you wasted your money with the porting and upgrades though. I wish I would have upgraded my head before slapping it on to the built bottem end.

 

[1995gstdsm]

Nah mine is still a 7-bolt, i forgot to put in there. Its a '98 block and '98 head going in my '95 gst.

 

[TopGun8818]

As far as the turbo and manifold - I would recommend checking the "vendor specials" section. Forced performance usually has a manifold/turbo combo (they recently had one on their famous 10lb of $hit in a 5lb bag turbo's on special). I recently bought their manifold to put on my big 16g; that thing works and sounds awesome!

 

[finesse49ers]

Just curious, what company is doing the head porting?

 

[1995gstdsm]

yea, I like the forced performance route. And there manifold is priced right (versus a $900 tube manifold) and its probably the route i'll go because this is my first real ground up build. And I should start with something more practical versus trying to dump money in something i'm not 100% familiar with. (hence the whole 1g 2g head dilemma )

Jackson Auto Machine in Hanover, Md. He did my machine work for block also, he does alot for DSM's. Has a banner ad on this site

Jackson Auto Machine in Hanover, Md. He did my machine work for block also, he does alot for DSM's. Has a banner ad on this site