3.1 heads the same as 3.4?

[95Batmobile]

Well nobody answered this in general tech so I am posting it here too.

Are the heads from the 3.1 the same as the heads on the 3.4?
I can get some 3.1 heads for free, my dad can port and polish them, and I can get a valve job free too, so aside from all the work I have to do I can get a lot of head work done for free if these 3.1 heads are the same.

[speedracer95v6]

3.1L and 2.8L heads are both from 60 degree v6s(like 3.4L). If you did P&P, valve job, and got better valve springs it should be great. I imagine they would fit right on.

[elvis89fb]

also go with larger valves check out super six heads and there flow work charts

[95Batmobile]

So the heads will fit?

[elvis89fb]

should fit, i know 2.8 and 3.4 will fit also 4.2

[3.4 slow to go]

yes, except for having newer springs & bigger spring seats 2.8~3.4 heads are the same.

[mattsv6]

no they arent if they are aluminum heads. the design is different. cc size is less and the compression ratio will be rediculously high and not streetable. there is a person that has done this swap, his name is russell. he no's all about this and he has alot of knowledge of the 60* engine also. not saying that noone else has as much experience, but he is one person that i no of that has done the swap succesfully.

rock on,
\m/

[Dojo2000]

<blockquote>quote:</font><hr>Originally posted by mattsv6:
no they arent if they are aluminum heads. the design is different. cc size is less and the compression ratio will be rediculously high and not streetable. there is a person that has done this swap, his name is russell. he no's all about this and he has alot of knowledge of the 60* engine also. not saying that noone else has as much experience, but he is one person that i no of that has done the swap succesfully.

rock on,
\m/<hr></blockquote>

IIRC Russell swapped 3400 FWD 3.4L heads onto his L32, not 3.1 heads.

[mattsv6]

3.1 alum and 3.4 alum head are the same thing. there is 2 versions of these heads. o shaped and d shaped exhaust ports. russell has the d shaped 3.4heads. i no htis because i ported them for him a little while ago. now for his cam, heheheh [img]graemlins/burnout.gif[/img]

[nova]

<blockquote>quote:</font><hr>Originally posted by mattsv6:
3.1 alum and 3.4 alum head are the same thing. there is 2 versions of these heads. o shaped and d shaped exhaust ports. russell has the d shaped 3.4heads. i no htis because i ported them for him a little while ago. now for his cam, heheheh [img]graemlins/burnout.gif[/img] <hr></blockquote>

Yeah, right now the only thing russel has on his thats from a 3.1L is the upper intake. Last I heard he was trying to get that swapped to a 3400 series intake as well.

[3.4 slow to go]

let's keep this technical specific,
3100=fwd & aluminum heads
3.1= rwd &iron heads

3400=fwd & aluminum heads
3.4= rwd & iron heads.

I belive 95Batmobile is inquiring about the 3.1 heads off the 90~92 F-bodies.

[95Batmobile]

<blockquote>quote:</font><hr>Originally posted by 3.4 slow to go:
let's keep this technical specific,
3100=fwd & aluminum heads
3.1= rwd &iron heads

3400=fwd & aluminum heads
3.4= rwd & iron heads.

I belive 95Batmobile is inquiring about the 3.1 heads off the 90~92 F-bodies.<hr></blockquote>

Yes that's right.
So will everything swap from my 3.4 to the 3.1 heads? Or like you said previously, the spring seats and springs are bigger?

[mattsv6]

i apologize about that. if he had specified that he was going too use the 90-92 iron heads of the camaro/firebird then i wouldnt have even posted.

sorry for helping

[Jerriko]

Aren't the valves different sizes between the 3.1 and 3.4 heads? I know that 2.8 valves are smaller than the 3.4s and I was pretty sure that the 2.8 and 3.1 had the same heads. I may be wrong though.

[95Batmobile]

<blockquote>quote:</font><hr>Originally posted by mattsv6:
i apologize about that. if he had specified that he was going too use the 90-92 iron heads of the camaro/firebird then i wouldnt have even posted.

sorry for helping<hr></blockquote>

No dude, I appreciate you helping.
I am trying to get the best out of my 3.4 whether it be using the 3.1 heads or the 3400 heads, but either will be P&P with a valve job.

I just want whichever will work the best b/c I don't know if my valves and stuff will fit if the 3.1/3400 is a bear head. Know what I mean? I want to make sure stuff will swap if it needs to be.