Boooo. no bumper dragging on this run, but got a new PB on my Forged LS1 and PT8285 CEA BB turbo.

I set aside time to go to Great Lakes Dragway Saturday with my son and test out some of the new changes i've been making. I've upped my timing to 23* and hitting about .80 Lambda in my VE tables to richen up AFR from what it was previously. Boosted ethanol cars love around .75-.80 it seems. I also installed a new Boost Leash/Pulse Leash combo box to control boost. It's a boost by time system that has multiple stages with a bump box feature. I didn't get to test out the bump on the line but it does work. Just have to give it a chance next time maybe. I also set my 2step to 3600rpm and stiffened up my front shocks a little to keep the wheelies in check. Previously I stood on the bumper having the fronts too loose and 2step at 3800rpm. I only got one pass in Saturday using some starting place values so that I'd launch at about 10psi and ramp to about 20psi.


Attachment 722534

After that I had shut it down for the day. I sorta lied to the tech guy about running bottom 11's because he teched me hard as he didn't recognize me as a regular. I was asked sternly to get my **** set with a killswitch, trans blanket, neck brace, etc. Since I was there with my son I decided to watch some races with him and help my buddy tune his HHR SS.

Here is my setup. I know i'm doing it completely wrong by some peoples standards but it's working alright for me.

Motor
LS1 aluminum block 346ci 9.5:1 CR with Wisco Pistons and Eagle HBeam Rods
ARP studs and mains
317 Truck heads with dual springs
LS6 Intake
Precision PT8285 BB CEA Turbo
Tial 44mm wastegate and Q BOV
Boost/Pulse Leash

Trans
Jakes Stage 5 4l80e with D3 Trans Brake
Yank PY3400
Strange Chromoly DS

Fuel(passes on e85)
FIC2000 Injectors
Dual 340 Walbro Pumps
FuelLab Reg w/ 37PSI base pressure

Rear end and wheels
Strange s60 rear end
3.54 Gear
Billet Specialties Street Lites with rear single beadlock
Sportsman front tires
Pro Radial 275 rear tires

Suspension
Viking DA Coilovers(MWC) all 4 corners
BMR Lower A-Arms and Turbo Kmemeber
UMI LCA's, Torque Arm, Panhard Bar, SFC
MWC Drag Bar

 

I'd say you are doing it all right.
Nice results!
A little hard to read the time slip. 9.12@141?
You really get it done in the first 60 feet! Not sure my Nova will ever get there. At least on the foot brake.
BTW, I run mine at .77 Lambda as well.

Ron

 

9.12@148.8MPH is what it ran.

 

Ah. Makes more sense.

 

damn near in the 8s. nice pass man. Did you say 3,900 lbs with you in it?

are you running out of rpm's with the 3.54 gear?

just curious, but what did you make on the dyno?

 

Not sure what it makes on the dyno. Been trying to tune it at the track. I'm right up there an almost out of gear which is unfortunate because the s60 can only go down to a 3.54 gear which is what I have.

 

Here is a how much the car weighs without driver. I weigh in at 200lbs and I've since switched out the PT7675 for the PT8285 which is a good deal heavier and added a fire extinguisher so I'm pretty sure its right on that 3900lbs or higher even. Hooks up great though.

Attachment 722533

 

what cam/rpm's are you running? im assuming 28" tires?

 

28" tire and the cam is 225/225 .581/.581 113lsa. I was hitting about 6500rpm at the trap I believe.

My log says I was at 6533rpm when I hit 149mph

 

Nice pass. Car is running strong for sure.

 

Nice pass bro. I follow you on Youtube and I was glad when I seen the new vid pop up. That 60ft tells a lot. Pretty dope that the car weighs 3900lbs and moves out like that. Since Im LT1 im trying to cut weight and hopefully I can go low 10s high 9s...... You most def are motivation for me. Keep up the good work........

 

Great pass. Seems like the next goal would be 8's@150!

 

nice man....seems like 8's are coming soon. Nice 60ft.

 

Congrats will!

 

Congrats man great run.
But But But the timing is very high you're going to lift the heads... Hahahah

 

Thanks guys, I know that timing should be set to 8 right?

 

How does the T4 PT8285 CEA BB Compare with T4 PT88 ? HP , Spool and size wise?

 

This thing flies and looks effortless doing it. Sometimes I'm jealous of such light raceweights.

 

The PT8285 CEA BB will spool slightly faster than a PT88. If the 8285 is the non BB version then it will be nearly identical. By all accounts it seems based on track MPH/weights the 88' tends to make more power. Example: MightyMouse went 159 at 3800lbs on his PT88.

Physically they seem to be very similar. I currently have a PT88 on a Huron Speed V1 setup with stock radiator location and it fits just fine.

 

How much boost and et was MM pushing and what was the motor configuration. I've got a little more in it I can go. I only hit 20psi but should have enough to crank up to 23psi before my pumps start to dive hard. Dual 340's ftl.