My 4.3 vortec 84 FB

[rk970]

Finally (to much family visiting during the holidays soaked up way to much time) coming together. Hoping to get it back in this weekend.  And as you can see it does have a hefty balance shaft in it.. (previous engine did not).


And I modified the oil pan gaining 2 more qts of capacity, it is baffled and gated.

[digitalsolo]

Looks good!

[N2v8fcs]

nice work as always keep it up!

[rk970]

Got the oil pan on last night.






Tonight I will be masking and painting the block and hopefully I will be able to get it back in tomorrow

[Cobranut]

That pan looks great.  Nice work. 

[rk970]

It lives



I got the 80~100 kpa fuel mapping done. Sorting out the idle VE map/ignition.  #2 injector is starting to go (I have a new set to put in).
Speedo cable let go at around 4500 rpm/135mph in top gear (I was data logging at the time). I got almost 7 degrees of of castor and this little car is amazingly very, very stable.  And an absolute blast to drive..

[rk970]

F%$# my Life...   uggggg
Three different types of valve guide seals and three different types/sets of intake manifold gaskets.
Built an PCV oil catch can.. grrrr.   
Compression, 193, 195, 196, 195, 193, 192.  300 total miles so far on the new engine.
Burning a insane amount of oil (1/2 qt in 100miles) and the intake manifold was covered in oil..  no visible smoke under hard acceleration, slight puff upon hard deceleration.
#3, 5 and 6 plug soaked.   WTF..


Just a FYI   if you miss mark your dipstick by 1.125" and overfill on oil it will burn it like a mother trucker..
I cannot believe I did that.  the rear crank counterweights were boat propellers through oil. 
Things like this make me feel like an idiot.

[freeskier7791]

At least you figured it out, any damage from too much oil?

[rk970]

Started making new door panels.

[digitalsolo]

Pretty neat!

[Cobranut]

That's a neat little drill fixture.  Where did you get it?

[rk970]

Harbor Freight on the drill fixture

[rk970]

I have been data logging and tuning.. its running really, really good but kind of soft below 3000 rpm.  I was digging through my "junk box" and found a moroso 1/2" phenolic 4 hole spacer.  I radiused one side with a 1/4" router and put it in..  I was surprised it made a difference so I took it a step further last night.

[digitalsolo]

that's a heck of a thing.   Did it work?

[rk970]

that's a heck of a thing.   Did it work?

Yea, quite well actually.  The intake manifold has quite the short runners since it is a v6 and was designed to run a 4bbl carburetor.  I really think having an open spacer with a large plenum volume was creating a low rpm reversion problem from the cam overlap period.
I can duff around now in 5th gear @1500rpm and accelerate from that rpm, before it would really protest and bog...  has not affected the top end as i had to add a little more fuel to the ve map up top also..