Post your 11/12 second 455 combos!

Full weight 72 GS, fiberglass hood, heater/ac delete, inner wheel wells removed.

Best ET 10.764 on a prepped track

Best ET on a non prepped (street Track) 11.01 drives 11.3 ET all day long at these tracks.

Engine specs see my signature.

 

4th gear(1:1) crossing the line about 6100 rpms.

---------- Post added at 11:06 AM ---------- Previous post was at 11:02 AM ----------

had the TA 510 Hydraulic cam in this engine before i put the 294-98F and ran a 12.50@119 mph,no matter what the car is definitely not set up for 1/4 mile suspension is too stiff and need drag radials for sure.

 

That's still a 10 second MPH George. Impressive.

 

;-)

 

Yes, that 2.04 60 foot time is telling....nice to see that down to 1.5-1.6 and what would be going on 1320' later....

 

Full weight skylark
1970 455 ci. bbb
70 cast pistons fly cut by myself ,stock rods
Poted iron heads with standard size ss valves done myself
TA 210S hl cam with KB 1.60 roller rockers
All oil mods done & all ARP hardware used
SP1 with 71 buick 800 Q-Jet
HEI distributor @36 total timing
Sumped fuel tank w Mallory 140 pump -6 fuelline
SP400 with JW switch pitch converter
Ford 9" 3:90 Detroit locker
MT street ET 275-60-15
60'---1.678
1/8---7.474
1000---9.795
1/4---11.766
MPH---113.99

 

Very nice!!
What rpm are you leaving the line loaded and,
What rpm are you at through the trap?
Any suspension mods?
Cheers!

 

Thx.
I like to flash the converter from idle 800 RPM at high stall and before 2 nd gear switch to low stall to launch at big end approximately 6000 RPM
Metco upper & lower rear control arms and rear sway cheap 90/10 front shocks, stock springs
( JW converter 800 low- 3500 high)

 

And if its a four speed you really gotta be mentally damaged!!!

 

1972 Skylark full weight with A/C, power brakes, power steering
1974 462
TA cast pistons, calculated 10:1 compression
TA unported Stage 2 heads
TA 290H cam .508 lift 238 duration @ .050
Rhoads lifters
TA stock replacement rockers
TA Stage 2 headers 2" primary into 2.5" mandrel-bent exhaust with Dynomax VT mufflers
TA SP1 intake
QuickFuel 880 VS carb
Mallory ignition 8* initial 32* total at 2600
3.23 gears
TH 200-4R, 12" Trishield converter 2800 stall
Idles smooth at 750 with 15" vacuum
12.23 @ 108.45, 1.79 60'

 

Leaded high octane race fuel is used simply as a preventative measure when tuning on the dyno. It gives you more latitude to have the timing out, or the fuel curve too lean. A dyno loads the motor very hard.. WOT at around 3500, and the water brake is holding it from going any higher until the software lets it.

My dyno guy used to say that it's like having a 4 speed, with a 10,000 lbs trailer behind it, and shifting from first to 4th and flooring it.

I always tell my customers there is no extra credit for running pump gas at the strip, there is no reason at all not to add a few gallons of leaded race gas for an insurance policy.

If your worried about the actual tune, that's no issue.. since the specific gravity is nearly exactly the same, and the required fuel/air ratios are the same, there is no fuel curve difference required on race fuel, vs pump gas. I used to switch every motor back to pump premo when it was all tuned up the the dyno, but quit since every one either picked up 2-3 HP, or stayed exactly the same, always well within 1% anyway.

JW

---------- Post added at 11:16 AM ---------- Previous post was at 11:05 AM ----------

Two customer cars I actually had a chance to build and test at the strip.


70 GSX full frame off resto, full weight AC car, all iron motor

10-1 TRW shortblock
full port iron heads
290-08H cam
Performer intake
1000 Thermoquad
Headers, x pipe 3"
My VP TH 400/converter
3.55 gear 12 bolt

I ran it at 12.02 105mph at Norwalk in '04, on the way to deliver it to him. Just had a 26" ET street tire on the rear, the air cleaner in the trailer.

He later reported running it in FLA at sea level, it went 11.90's.

Built another car with almost exactly the same drivetrain, it ran 11.90's in FLA. I don't recall the MPH.

Another--

87 Regal- 3700 lbs
600 HP STG 1 SE motor
240/241 flat tappet
SP1- TQ
10" 3500 stall converter
3.73 gear.

Ran consistant 11.30's at 2500 ft da around here.
Later ran int he high tens on the coast, around 120ish mph.

That one you did not want to downshift the trans on the highway, it would spin the 275/60 BFG's at 60mph.

JW

 

If people are using an air fuel meter then they need to know what stoich is for their fuel. For example stoich for race gas is 14.7, stoich for pump gas with 10% ethanol in my area is roughly 14.1. This will affect your max power afr number. A rule of thumb is to multiply 0.85 by the stoich for your fuel to find your max power afr If you use a lambda meter then approximately 0.85 is where you want to be for any stoich fuel.

 

what is you 60ft on the those 11.60 passes , I just dug up my slips from cecil and my best run was a 1.570 60ft wich kinda shocked me since I have all road race suspension . that fixed pitch should do well in your car right around 3000 stall.

 

Hey now - don't go insulting Cassidy, Lagna and the Andrews' Sisters like that uzzled:

... not to mention Tom Zazuski ou: