building destroked 3400

[bjornmk1]

it's an 3400 block,I'm sure.

it has an A on it.
bore is 92mm.

I got it without the upper plenum though,but i bought the upper part on ebay
for 12$ LOL.

bjorn

[bszopi]

Ok, that's cool. Like I said, I wasn't sure exactly... I knew the 3500 was a "C", and that the earlier models were either A or B, and just that I remembered that they went in order, but obviously GM opted not to do that.

[Superdave]

Do you have the entire engine? Does the plenum say 3400 on it, or better yet, does it attach with just 6 bolts?

The only reason I ask is because, from what I remember, blocks with the letter "A" on them are 3100s. 3400s have a "B" on them, and 3500s have a "C". I could be wrong, but if you only have the shortblock, I'd measure the bore to make sure its a 3400.

3400's have A, 3100's have B and 3500's have C

here is my old 3400:

[bszopi]

Do you have the entire engine? Does the plenum say 3400 on it, or better yet, does it attach with just 6 bolts?

The only reason I ask is because, from what I remember, blocks with the letter "A" on them are 3100s. 3400s have a "B" on them, and 3500s have a "C". I could be wrong, but if you only have the shortblock, I'd measure the bore to make sure its a 3400.

[ForcedFirebird]

those combustion chambers will also be done.
the work on intake wasn't finished either,it needs some beedblasting
to rough it up a bit,to smooth for the intake side is not going to be optimum.

the TB is from an alfaromeo 1.7L !!!(imagine that)

and wether direction it opens..eh..don't know
I don't have the 3400 TB here.

I was also thinking of making a oilspray to cool the pistons 5/6.

B

I would like to see pics of the cumbustion chamber when finished, and what size TB are you talkin?

[IsaacHayes]

3400 TB opens same direction as 3.1mpfi/2.8 I believe.

[bjornmk1]

those combustion chambers will also be done.
the work on intake wasn't finished either,it needs some beedblasting
to rough it up a bit,to smooth for the intake side is not going to be optimum.

the TB is from an alfaromeo 1.7L !!!(imagine that)

and wether direction it opens..eh..don't know
I don't have the 3400 TB here.

I was also thinking of making a oilspray to cool the pistons 5/6.

B

[IsaacHayes]

Are you going to polish the combustion chambers?

That 65mm TB looks like it might bolt on to a 3500 plenum. That would be a nice upgrade too Looks like the way a mustang 5.0 throttle body bolt pattern is, and those bolt up with just enlarging one bolt hole or so.

Am I correct in that that throttle though opens the same direction as the stock 3400 TB does?

You should be able to do 250hp crank with less than 10psi I would imagine.

[bjornmk1]

okay,thanx for the fix el diablo.

yeah..maybe keep the primairies a bit smaller.
since it's not a 3.4L but a 3L displacement engine.

I'll keep you posted guys.

[Superdave]

Nice build!

1.75" primaries are too big, i'd stay with 1 5/8".

[ForcedFirebird]

Yes, and thank you for the pics of the ported 3400 heads. Mine are getting started soon, did you port the lower to match?

Good score on the low mile block, too.

[TurboAlero]

Nice keep it up dude

[El_Diablo]

here are some of the goodies I bought:

the 3400 block with only 16 miles on it

the scuffed 3400 piston that i did a post on

and the 3400 ported/polished head intake

the intake bowl

the exhaust port

the scat 327 rods

and a 65mm throttle body from a european alfaromeo

these are some of the base products that will be used for the build.

fixed....

[ForcedFirebird]

Coud you fix some of the other pics? I'm curious!

[bjornmk1]

here are some of the goodies I bought:

the 3400 block with only 16 miles on itIMG]http://i153.photobucket.com/albums/s238/futurefiero/block.jpg[/IMG]

the scuffed 3400 piston that i did a post on

and the 3400 ported/polished head intakeIMG]http://i153.photobucket.com/albums/s238/futurefiero/portedintake3400head.jpg[/IMG]

the intake bowlIMG]http://i153.photobucket.com/albums/s238/futurefiero/intakebowl3400head.jpg[/IMG]

the exhaust port

the scat 327 rods

and a 65mm throttle body from a european alfaromeoIMG]http://i153.photobucket.com/albums/s238/futurefiero/throttlebody65mm.jpg[/IMG]

these are some of the base products that will be used for the build.