the gen 3 3.4 started in 96,in vans(99 in cars),and it had the 1.76 valve,3100 got the big port intake and big intake valve in 99 or '00
the big port 3X00 intakes have a 56mm tb insted of a 52mm like the older 60*v6

 

the 1.76 valve size was on the 3x00 (3.1 and 3.4 fwd) engines in 2000 and later. Where did you find the info that the bigger ports have bigger TB's ? I hadn't heard that. Also the original TB size is 50mm, not 52, but thats moot. The Gen 3 3.4 did start in minivans, but the car I first noticed the setup on was my Aunts 1999 Grand Am GT. That's where I first knew that GM had another 3.4L Motor. After doing research I found that they first started in 1997 in the Grand Am, and 1996 in the Venture.

Not really relevant to my post.

 

most of the stuff I know is from reading the 60*v6 forums for years(I still remeber when it was part of gmforums)
as for the tb,I've seen with my own eyes that the 3400 & large port 3100 tb is bigger than all the previous ones

 

man if only this stuff would work without a piston change....

 

Dido.

 

Only thing I have to say is well... sure the 3.4L coudl probably be made to make oodles of HP but, you will have to do alot of R&D yourself, and spend alot of money.

I enjoyed and miss my 3.4L at times, but hell even with my 3.8L I think tis crazy to go too nuts on them because you have to do alot of research yourself. Which gets pricey and unfortuneatly I don't have the money for that

 

I know this thread is about the 3.4 but i have a kinda similar question about the 3800. What is the differance between the 3800 series II and series III or the rwd and frd motors? Are there any parts like heads, intake, that you could swap for the better like you did on the 3.4? If nobody knows thats fine, but I was just wondering.

 

not much.the n/a ones get a aluminum intake,and the supercharged ones get a gen 5 blower,stronger rods and a returnless fuel system

and fwd and rwd are older fwd have a plasitc intake and a different oil filter location/angle,and exhaust mainfolds are different

 

Nice write up,I wonder what the intake manifold alone would be worth?

 

the problem is that the intake manifold (upper and lower) cannot be used without using the aluminum heads. the same can be said about the heads themselves.

its not a one or the other package.

 

I guess that answers my question.

 

I agree. Great read.

 

Russel: I've not posted here for quite a few years, but I was intrigued by your post. I was wondering if you could hypothesize what difficulties might be encountered if one were to swap a FWD minivan or GA GT donor motor into the F-body? This would avoid the rebuild cost (but still have to rotate the upper intake manifold 180 degrees as you stated). Big question is...will the RWD accessories bolt onto the FWD block? I expect the tranny housing will bolt up fine. Engine mounts should be the same, right?

Also, do you like the FWD GT cam profile better than the RWD? I noticed you don't mention changing the cam, or was that implied?

 

the fwd motor has different mounts than rwd,so it won't bolt in also the starter is on the wrong side and the cast aluminum pan wouldn't clear the camaro x-member

as for the cam,it won't work in the rwd block(due to oiling and the rwd block dosn't have the bosses for the cam retainer) and even if it did, it isn't much bigger than the x-11 cam in the rwd 3.4

 

heh. i love how my posts turn into other peoples posts on this board.

hes somewhat right. most of the engine info is good, the cam in the 3400 is actually milder than the 3.4L RWD cam - hence the more tq output.

thats why i didnt mention changing the cam, because i didnt. i still have my stock 3.4 rwd cam in the engine.