What do you need to turn a v6 engine into a v7? I'm thinking:

Turbo
IC
Heads
AVCS wiring kit
Manifold

Anything else?

i think teh shortblock itself is different aswell

yeah might as well start with a fresh 7

a complete V7 :rolleyes:

:lol:


Wait... your not joking?

Dude just get ver 7 heads. If your short block is in good shape then dont bother replacing it. And there realy is no reason to go with a vf30/34 try a 16G... manifold on a v7 is the same as a v6. Ver 8s are the ones with new manifolds.

version 6s didnt have TGVs/TGV deletes IIRC

http://bbs.22b.com/cgi-bin/ultimatebb.cgi?ubb=get_topic;f=8;t=000563#000003

Good link showing the diff. between v6 and v7. Bottom line, they are very different. Just get a v7 instead of ''making'' a v7.

Thanks to dmross for the link. (Need your paypal, i lost it. i'll get you that $5:D)

The main reason for going V7 would be the AVCS, I'm guessing? (Really, what is your motivation?)

If it is the AVCS, then all you really need are the heads, cam gears, and an AVCS ecu. With using the newer ECU, you might run into wiring harness problems where the connectors are different on the ECU, wires are present on one and not the other, or sensor signals themselves are different.

*edited because I'm a gack and don't know what I'm talking about*

-Jon

The IC may be smaller, but I've never seen any data on the V6 IC. The turbo is actualy a VF22, I believe. So swapping the turbo may just be different, but not necessarily an upgrade. Manifolds are almost the same as well as the internal structure of the shortblock.

-Jon

That's the thing. The shortblocks are different. The v5/6 phase II ej207's are open deck. They also don't have all the forged goodies the v7 has. (pistons and rods i believe actually, crank maybe) It's not a vf22 on the ej207's. It's a 28/29 i think depending on v5/6. v3 non sti was the 22, and i think a few 22b's had them. (most didn't)

I fixed the link i posted...should work now. It wasn't working for some reason. :o

I don't have either yet. I'm deciding which to get. v6 or v5 is cheaper, but v7 has less miles, has AVCS, and is closer to the WRX engine I'm used to working on.

I'm pretty sure v1-3 were closed deck and v4-8 are open. They all have forged internals except the v8 which has hypercast internals. I think the v7 comes with a vf30 and the v6 comes with a vf28 but I'm not sure about that.

edit: okay after reading that 22b conversation they seem pretty convinced that its open block --but then how does it have an 8k redline? It seems like the open block wouldn't be strong enough???

I have removed the crap I was too lazy to reseach. I thought I remembered a fellow up in Canada that did a V6 that had a VF22. There are plenty of differences though, so I guess one must evaluate why they have what they have and why they need/want what. For example, the forged goodies inside the V7 were a priority for me while the open/semi-closed deck was not. I'd go ahead and bet that many of the differences are irrelevant for most applications.

-Jon

meh. I think I'll be safe and just shell out the extra $$ for the v7.

v6 > everything

~v6

Lachlan...open or closed wouldn't much have to do with the redline, more so with ultimate clyinder pressure it can handle. The redline is mostly dicatated by the heads at least for the ej20. Pistons and rods can come into play, but afaik that's not the case here. Keep the boost semi sane and you'll be all right with the open deck.:D

As stimpy says either way it's probably irrelevant as either will work plenty well for most applications. Yes stimpy the forged internals are very nice. The v7 is a very very strong motor. I'm jealous and want a v7 again.

V6- HA.:)

:lol:

~v6

V7.... WORD... :p Yea... I can't say anymore other than I want one.

keith

Well if the price of the v6 + new forged pistons = less then the cost of a ver 7 then... its not like your going to run a huge turbo right(ie. gt30, green,...)?

The ver 6 has forged pistons so there is no need to buy new ones. As far as i understand all subaru engines even the NA ones have forged rods and cranks. I think the v7 has a nitrated crank, which in my opinion is a waste. If something does go wrong with a bearing the crankshaft becomes a cool door stop, it can not be machined.

Everyone knows that the v7 is a superior engine to the v6. The v6 are old, have high miles, are very week and AVCS makes your car go super fast! :rolleyes:

''standard crank, standard rods, forged pistons, STi cams, solid underbucket shimed followers, 440cc injectors, VF28 Turbo.''

That's from john felstead in case you didn't check the link. Bob rawle also says the rods and crank are the same as the ej205. So yes they are forged pistons as you mentioned.

Sorry, but the v7 is a better motor, i don't know why you need to be sarcastic about it. Semi closed deck, forged rods and crank. Debateably better head castings (as the verdicts not out on exactly which ones had the ''big port'' heads) And yes avcs...it does help and some people do find it useful.

Forged pistons are all well and good...but for real power the forged rods and semi closed deck are useful. Most v6's do have more miles like you mentioned. It's not like the v6 is a ''bad'' motor, it's just not as ''built'' as the v7. No need for a rolleyes smiley. I'm sure anyone would gladly take either in a heartbeat.:)

Wow this is getting to be a real big debate. As I cannot really see why they are both good motors but as previously stated the V7 is a tad more "built" than the v6.