Thumper,
Oh, cool on the street race, I could tell you weren't condoning it - just never know who might be reading in the future.
WOW you have a lot of potential in Big Bird.
I went thru the Gonkulator step by step and got your 0-60mph down around 4 flat which is competitive with most of the overpriced new stuff.
Here goes -
Engine - never quite sure what "mild porting" means but I guessed and the Gonk says
Torq 524 at 4000
Powr 514 at 5700
The Gonk likes to shift at 6000. Shifting at 6200 did not go faster.
421 net hp assuming you turn a clutch fan & power steering.
Here is the Gonk timeslip right now but I'll just give 0-60mph and 330ft from then on, since that is where most street action is.
1.96
5.57
8.58 at 82.2
13.37 at 102.2
5.12 0-60mph
So that's
5.12 5.57
First thing I did was make the Bird magically hook up, that just takes out a lot of variables later.
5.04 5.52 Hooked Up
4.84 5.43 cold air if you haven't done that already
4.72 5.36 gear=3.89
4.62 5.31 gear=4.30
4.50 5.26 gear=4.86
4.47 5.25 gear=5.14 best. No gain going steeper
4.29 5.18 3" pipes & muffs. (2.5" is a good size for a 428cj but not much more)
3.65 4.89 spray=100, on at 3200rpm just above stall
So far no major parts replacement yet, but you don't have a freeway car.
You can sure keep up with those kids though.
Oh, I forgot about all those parts that will break right about now...…
gotta feed the Feral for a minute.....
Ok both cats got their food, brush, and treats.
Now back to stall.
At this point the 4000 stall slowed it DOWN - mainly because I'm waiting til just over stall to hit it with the Spray.
So the spray hits sooner with the ~3000 stall vs 4000.
An artifact - but, instead of adding a new converter (and yanking the engine again....) why not just get the NOSS working instead and see how much of the Gonkulator numbers start coming true?
Ok wait the Feral needs more food.
Ok back. So you've left the engine & trans alone, except for tuning.
Now the only major problem is the 5.14 gear.
NOW, instead of getting another converter, go for a fancy new trans.
That's about all I can think of and still keep it streetable.
Final timeslip:
1.67
4.89
7.56 at 91.7
11.90 at 112.6 and 7200rpm
or
12.30 at 95.5 if you just hold 6100rpm after the 1/8 mile and don't overrev it.
3.65 sec 0-60mph
That way, if you're happy after the 5.14 and the other mods, you know the fancy $$$$ trans will be worth it. Or if you're bored by then just put the 3.50 gear back in, or even 3.00, and have a freeway cruiser.
