Well I made a bunch of changes to my plymouth, and it definately helped the power but not the traction!

Last time out, the car would not RPM over ~5800 and converter was slipping/flashing way to high.

Swapped out the used 125lb/300lb valve springs for a set of 165lb/450lb new ones. That fixed the RPM issue.

Sent the converter back to PTC for a stator change, so that fixed the slipping/high flash stall issue.

The car was also at the point where it was going hard right on launch, and sagging on the right rear. So I added some spring clamps since last time out too.

Well first of all, now the converter is so tight I'm having a heck of a time getting it to spool. With the anemic power of the motor without the turbo, it will only stall at ~2300rpm. Takes almost 8 seconds from full throttle to make it to launch boost. Also, between the converter and/or the spring clamps, it will NOT hook at all.

Made the first three passes and it just RIPPED the tires. I did roll back into it though so I could see what the MPH was. Promising so each time it ripped the tires I started adding some timing into it. Picked up 4mph alone with just timing changes this weekend!

Finally kept backing down the boost/RPM and timing on the launch and got it to hook. Red lit in the 2nd round (car rolled in trying to fight off the tight converter), so I ran it out the back door.



Previous best (1500ft DA)
60ft - 1.50
1/8 ET - 6.74
1/8 MPH - 103
1/4 ET - 10.58
1/4 MPH - 128

New Best (3500ft DA)
60ft - 1.68
1/8 ET - 6.74
1/8 MPH - 105.74
1/4 ET - 10.48
1/4 MPH - 130.59


If I can get the 60ft back where it was, this thing is really going to fly. Most impressive that 105.74mph in the 1/8 mile @3700lbs is really making some power now. Gotta be near or maybe even a touch over ~700hp I would guess.


Most often comment heard this weekend. "That thing is so ugly it's cool."

Post vids or it didn't happen....

Very impressed with your 360 project for sure...Keep at it. One of these days I will build somthing boosted. Meanwhile, I will have to learn from you, and your so called "ugly" car...Fast is beautiful baby!

So how about spilling the beans on the combo as it sits currently:

Trans
Engine
Gearing
Turbo
etc..

That thing is starting to come around.. low 10s are
in it... is that with the 2.90 gear

Scott it was great meeting you this weekend and yea that beast is the "King of sleepers" in my book


Unreal to see that car run those numbers because from the stands/fence it looks like it would be your grandads 19 second ride

You are doing an awsome job and I'm sure you will get it going faster


Russ

That car has to surprise the heck out of alot of people. Very cool car. Ron

that's great, I wonder what a similar build and say 100 more cubic inches would produce...
If you didn't load it up so much would that help w/ your 60 foot? Might be time for caltracs....

Congrats! How much boost are you running? And I know I have asked before, but what is your exh AR?

I LOVE that car.
People must just about soil themselves when they see the scoreboard.

That thing is down right awesome!

Great to meet you Scott!

Casey

Cool ride!!!!!

Thanks guys. It's really starting to come together now.

I need to try moving the clamps on the spring or taking them back off. Should hook better then what it did this weekend. I have cal-tracks I could put on, but I don't want to ruin the sleeper look!

For those that don't know the combo:

360" Cast crank, stock rods (ARP) bolts, off the shelf probe pistons, home bowl ported iron heads, 224/218" cam .500"/.500" lift, 9.2:1, blow through non-intercooled E85. Truck manifolds feeding a S475 turbo (75mm/ 1.32AR), single 4" exhaust out the back.

Push button 727 (all stock parts except trans brake and super sprag).
9.5" PTC converter
8 3/4" with a 3.23 posi
275/60 M/T drag radials
3700lb race weight (with me)

"8 3/4" with a 3.23 posi"
(it's a "sure-grip" hahahaha)

Dragula, ANOTHER good thing about turbo combos is that you don't need much of a converter (at least for 9 sec combos). I run a 3000 and bet his is close to that too.

How do you like your S475? If you could do it all over again would you use it again?

yeah I see that now, maybe he was talking about a glide once or something.....

727 (Push button)
Converter only stalls to 2300 on motor, but will go to ~4800 at full boost.

Drives around like a 16 second diplomat until you hammer it... lol