507 Cadillac - Build

Cadillacs R Us

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Truck went 12.48 at 112 today in 29 degree Celsius heat. 2.2 60'

More to follow

You have some nice stuff under your truck Brennan. Your Cal Trac adjustment must be right on with no wheel hop. Looks good.......

I called John Calvert about the wheel hop in my 82 long bed, and he said they are using his bars on the west coast where he lives. He mentioned softer springs.....so I replaced with new 3 leaf with no heavy overload leaf.....but I still had so much wheel hop that I broke a 30 spine Moser on drivers side in the dana 60 under my truck. I could not find the Cal Trac proper adj. Oh, I had adj. shocks angled straight up like yours also.

Best 60` was 1.80 there abouts........and I was heavy with 2 1/2 ton floor jack in cab and tools....with dual gas tank with much fuel for the 98 mile trip one way to the strip.

Hope you can nail down your 60`......looking at your speed should put you in the mid to upper 11 second area. Good luck!

Ron
 

CanadianC10

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I foot braked an 1.80 60foot,

Was fighting the suspension all week by myself, couldn't get it to keep the tire loaded off the T brake, it smacked the tire good and hard but then unloaded - so 30 minutes left on Sunday and a guy comes over, looks at the truck and says your shocks are bottoming out off the line, I said I don't think so, I set them up like Calvert recommended with 2" for compression and the rest for extension, so we put a zip tie on the shock and sure enough all weekend it was bottoming the shock out............. It was hard for Me to see what it was doing, and I was so sure the shocks were not the problem. Sometimes you need to step back.
 

Darius

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12.48 E.T.

Well Done, Brennan!

Best,

d
 

bugzaper

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I'm running just "2" leafs on each side of on my 1980 C-10 short-bed, with very short shocks mounted directly under the axle and along side the inner frame rails.
My engine is just a warmed over 425 / turbo 400 / 2:73 pos-a-trac Ford 9".
When I get on it, it squats, spins the tires fro about 40' (street radials), front end raises about 4" and runs straight as an arrow with no wheel hop whatsoever.
I have relocated the front upper shock mounts about 3-4" higher than the stock location to allow for more upwards travel and played around with the upper control arm positioning.
I've never taken it to the drag strip so I can't tell you how fast / quick it is.
I'll see if I have any pics. to post.


"Trial and Error" just ain't no two ways around it.
 

CanadianC10

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Something is binding in the rear suspension to keep make it squat.

Cal tracs should be seperating the axle and chassis not squating!!
 

bugzaper

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Something is binding in the rear suspension to keep make it squat.

Cal tracs should be seperating the axle and chassis not squating!!
No "Cal-Tracs" on this truck, my V8 S-10 has them but, not my C-10 just leafs.
 

CanadianC10

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need traction to create wheel hop..

Never had any issues with wheel hop or chattering - just straight up unloading
 

CanadianC10

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has good weight transfer as the front comes up 4-5 inches, but as soon as the tire unloads the front drops as it should
 

CanadianC10

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On a side note..

It was also dead rich with a 87 pri get and 93 secondary jet - like 10:1 rich.. and I never recall it ever being that rich - it ran best with a 75 pri and 81 secondary?? and still on the rich side - is there anything that could cause a motor to go dead rich at WOT only - idle was normal dead lean but WOT was dead rich, and moving that many jet sizes didn't help it much
 

Member 3508

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Are you still set to 2800 on the 2-step? 2800 is already pretty low, but maybe set it to 2000 till you get more bite and then ramp it up. Cant really soften the hit with caddy torque, unless you start playing with timing.

As for WOT being rich, 75/81 seems really low. Although im not sure what difference fuel makes. Im running similar to 87/94 on a demon 850 with 91 octane. Sounds like a powervalve issue (although I seem to recall you have them plugged) or you have a plugged airbleed somewhere.

What is your carb setup again?
 

CanadianC10

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member 3508, I turned it up to 3000 and it seemed to recover quicker. I have to lower the shock bracket on the rear axle. The shocks were bottoming out.

As for carb, your right with the plugged air bleed. I found a small piece of something in the rear driver side airbleed
 

CanadianC10

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Update,

Painted the Truck this spring.

Managed to footbrake it to a 7.44 in the 1/8, 11.84 in the 1/4 with a 1.71 60'. Still havent put slicks on it yet, I know it will 60ft better than that.

Had it on a wheel dyno.

Made 852tq and 567Hp to the wheel, after tuning, before it was lousy due to fuel pullover from the secondary pump nozzle flooding it.

Motor seems to be doing "okay" I am getting some material in the filter, oil pressure holding steady at 70-80psi at cruise. Accusump helps alot.
 

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Darius

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The Dead have arisen, and he who was lost, is found!

How you be Young man? Nice to see you back.

Also nice to see the track times you've been laying down. That truck of yours was always a good performer.
Did you do the paint job yourself? I certainly looks nice.

Brennan, just what are you feeding that thing to get those torque and horsepower numbers?

Best,

bro. d
 
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CanadianC10

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Hey D.

been doing good, bought a home and I’ve spent most of my time refinishing it.took time in the spring to paint it, did the body work and sprayed it in my double gar garage with a 40 dollar HVLP amazon gun and a 20 gallon harbour freight compressor. Single stage urethane

The huge tq number I think is a factor of the converter, when I re did the heads last they put in 2.25” and 1.90”?? Valves, I also de-shrouded all the valves and cleaned up my amateur porting job. It definitely performs a lot better, it’s blowing through the converter I feel, about 700rpm slip at top speed.

hope all is well,

Brennan
 

5one9

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Update,

Painted the Truck this spring.

Managed to footbrake it to a 7.44 in the 1/8, 11.84 in the 1/4 with a 1.71 60'. Still havent put slicks on it yet, I know it will 60ft better than that.

Had it on a wheel dyno.

Made 852tq and 567Hp to the wheel, after tuning, before it was lousy due to fuel pullover from the secondary pump nozzle flooding it.

Motor seems to be doing "okay" I am getting some material in the filter, oil pressure holding steady at 70-80psi at cruise. Accusump helps alot.

567rwhp is phenomenal
852rwtq is 200ft-lb past phenomenal
 

CanadianC10

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We started the runs at 2000-5500 i would mash the gas and it would immediately spin to 6000. It took 2 times before we realized it was spinning on the dyno. 2 straps to the rear crossmember vertical to the floor fixed that.

I told freaks how my truck might make 600 to and 400hp. I also thought my motor would make power through 6000. Converter is not matched to the combo. I feel my mph should be higher, it has gone 114 in the 1/4 before
 

PJ McCoy

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We started the runs at 2000-5500 i would mash the gas and it would immediately spin to 6000. It took 2 times before we realized it was spinning on the dyno. 2 straps to the rear crossmember vertical to the floor fixed that.

I told freaks how my truck might make 600 to and 400hp. I also thought my motor would make power through 6000. Converter is not matched to the combo. I feel my mph should be higher, it has gone 114 in the 1/4 before
Man that's awesome!!!
Good to see some new reports on the old build.
 

5one9

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We started the runs at 2000-5500 i would mash the gas and it would immediately spin to 6000. It took 2 times before we realized it was spinning on the dyno. 2 straps to the rear crossmember vertical to the floor fixed that.

I told freaks how my truck might make 600 to and 400hp. I also thought my motor would make power through 6000. Converter is not matched to the combo. I feel my mph should be higher, it has gone 114 in the 1/4 before
With that hp you should easily see 120mph
 
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