April 26, 2019, 02:28:25 AM

Author Topic: My 4.3 vortec 84 FB  (Read 44024 times)

Offline rk970

Re: My 4.3 vortec 84 FB
« Reply #285 on: January 22, 2019, 06:38:03 PM »






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.

Offline digitalsolo

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Re: My 4.3 vortec 84 FB
« Reply #286 on: January 22, 2019, 10:28:58 PM »
Looks good!
Blake MF'ing McBride
1988 Mazda RX7 - Turbo LS1/T56/ProEFI/8.8/Not Slow...   sold.
1965 Mustang Coupe - TT Coyote, TR6060, modern brakes/suspension...  project car
2013 Focus ST3 - Stage 1 BPU

Offline N2v8fcs

Re: My 4.3 vortec 84 FB
« Reply #287 on: January 23, 2019, 05:49:08 PM »
nice work as always keep it up!
:drive:
new personal best 11.45 @ 120 mph N/A car...9.11 @152 mph for the turbo car.


1987 FC  355 SBC, T-5, T2 rear        retired 5-4-11
1991 FC  383 SBC, sold to Dad. Now 5.3 w 76mm turbo, G-force T-5, 8.8 Ronin rear 
1990 FC  370 CID 6.0 w 88mm turbo, Powerglide, Ronin 8.8 w 3.15 gears

Offline rk970

Re: My 4.3 vortec 84 FB
« Reply #288 on: January 23, 2019, 08:47:54 PM »
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

Offline Cobranut

Re: My 4.3 vortec 84 FB
« Reply #289 on: January 24, 2019, 07:45:54 AM »
That pan looks great.  Nice work.  :afro:
1995 FD, 7.0 Liter stroked LS3, T56, 8.8, Samberg kit.

Offline rk970

Re: My 4.3 vortec 84 FB
« Reply #290 on: February 07, 2019, 02:53:44 PM »
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..
« Last Edit: February 07, 2019, 03:03:57 PM by rk970 »

Offline rk970

Re: My 4.3 vortec 84 FB
« Reply #291 on: March 20, 2019, 12:41:57 PM »



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.

Offline freeskier7791

Re: My 4.3 vortec 84 FB
« Reply #292 on: March 20, 2019, 01:12:32 PM »
At least you figured it out, any damage from too much oil?

Offline rk970

Re: My 4.3 vortec 84 FB
« Reply #293 on: March 22, 2019, 07:43:40 PM »
Started making new door panels.


Offline digitalsolo

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Re: My 4.3 vortec 84 FB
« Reply #294 on: March 22, 2019, 10:30:51 PM »
Pretty neat!
Blake MF'ing McBride
1988 Mazda RX7 - Turbo LS1/T56/ProEFI/8.8/Not Slow...   sold.
1965 Mustang Coupe - TT Coyote, TR6060, modern brakes/suspension...  project car
2013 Focus ST3 - Stage 1 BPU

Offline Cobranut

Re: My 4.3 vortec 84 FB
« Reply #295 on: March 23, 2019, 03:58:24 PM »
That's a neat little drill fixture.  Where did you get it?
1995 FD, 7.0 Liter stroked LS3, T56, 8.8, Samberg kit.

Offline rk970

Re: My 4.3 vortec 84 FB
« Reply #296 on: March 25, 2019, 01:40:15 PM »
Harbor Freight on the drill fixture

Offline rk970

Re: My 4.3 vortec 84 FB
« Reply #297 on: March 25, 2019, 01:46:59 PM »




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.












Offline digitalsolo

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Re: My 4.3 vortec 84 FB
« Reply #298 on: March 25, 2019, 04:01:30 PM »
that's a heck of a thing.   Did it work?
Blake MF'ing McBride
1988 Mazda RX7 - Turbo LS1/T56/ProEFI/8.8/Not Slow...   sold.
1965 Mustang Coupe - TT Coyote, TR6060, modern brakes/suspension...  project car
2013 Focus ST3 - Stage 1 BPU

Offline rk970

Re: My 4.3 vortec 84 FB
« Reply #299 on: March 25, 2019, 06:25:09 PM »
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..