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Old 10-21-2011, 07:09 PM   #46
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Default Re: Something's not right???

It will run the number once you get it to 60.
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Old 10-22-2011, 07:55 AM   #47
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Default Re: Something's not right???

My MPH is the same , no matter what the 60'
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Old 10-22-2011, 08:04 AM   #48
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Default Re: Something's not right???

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Originally Posted by 78buickregal View Post
Yes, the wallace calculators seem to be pretty darn accurate if used correctly. But they usually apply best when applied to an all-out race car. When you have street car gears, street car tires, street car tuning, etc, you'll find they are less accurate.

One thing that should be asked since it is a heavy car, are you still running power steering? I'f you've ever broken or thrown your power steering belt between runs, you'd know that besides the weight of the box and the pump, the drag of the belt is significant. Even more so than a water pump. Especially if your car doesn't track straight. A long time ago, I had a 79 Camaro that ran 15.5s in the 1/4 with bad alignment. It was my daily driver, street car with wide front tires and power steering. I broke the power steering belt on a pass and the car picked up more than a tenth. Well, the belt must've broken mid-pass, because the next pass, the car picked up just over 4 full tenths from the original pass!! I couldn't believe it!! I never ran power steering on that car again, not even on the street. It may only mean 1 or 2 tenths on a 12 second car, but that is still significant.
I actually tried taking the power steering belt off once.....and it helped ZERO on my car and my dads. I guess every car is different!
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Old 10-22-2011, 01:29 PM   #49
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Default Re: Something's not right???

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Originally Posted by boostedbowtie View Post
My MPH is the same , no matter what the 60'
How much does your 60 vary?
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Old 10-22-2011, 02:22 PM   #50
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Default Re: Something's not right???

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Originally Posted by boostedbowtie View Post
My MPH is the same , no matter what the 60'

That's because your 60' is an elapsed time, calculated by how long it takes to get from one point to another at the beginning of the track. Off the line slippage will greatly affect this number. While your MPH is a speed averaged over a distance at the end of the track, not an elapsed time. As long as you are able to apply full power or relatively close to full power the entire length of the track, your MPH should be very close to the same every pass. You will also find that no matter what your 60', your time between the 1/8 mile mark and the 1/4 mile mark usually doesn't change any more than the speed does, relatively speaking. That's because your car travels the end of the track with more consistancy than it does the beginning of the track, especially if your 60's vary.
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Old 10-22-2011, 02:45 PM   #51
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Default Re: Something's not right???

I've had runs with 60' from 1.40 to 1.60 and still ran 139mph .

I've had 1/4 mile times from 10.10 to 9.62 and still the mph is 139 .

I've seen a best mph of 143 and ets are slow ...... in the 9.7 to 9.8 .


The variations in my ETs are all about track conditions at OSW .
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Old 10-22-2011, 08:19 PM   #52
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Default Re: Something's not right???

So your saying if he can get his car to run 1150s he should run 107 still?
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Old 10-22-2011, 08:34 PM   #53
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Default Re: Something's not right???

No , I'm saying there is something wrong other than the 60' .
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Old 10-22-2011, 08:41 PM   #54
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Default Re: Something's not right???

Like he said , it should be running 117 with his HP . Hes loosing 10mph ........ the 60' aint gonna help that .
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Old 10-22-2011, 10:28 PM   #55
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Default Re: Something's not right???

post your time slip up.
You shouldnt need anything aftermarket suspension wise to run mid 11's to high 10's except good tires

Cust of mine has a 71 velle 3700lbs
th350 10" Trans Spec convertor 3.73s
383 sbc brodix rr200 head edelbrock airgap
HYD cam dur @.050 336/242 108ls elec fan mech water pump

runs 11.97 to 12.10's all the time @110/112mph
Monroe shocks front&back front stock springs
stock control arms no lift bars
Drag radials 60ft in the 1.75's regular
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Old 10-22-2011, 10:34 PM   #56
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Default Re: Something's not right???

Well he said the tires are spinning so before he can get it to hook its hard to even start to point fingers at what it is.
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Old 10-22-2011, 11:47 PM   #57
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Default Re: Something's not right???

Quickest and fastest time slip so far is....

60' - 1.806
330 - 5.133
1/8 - 7.924
MPH - 87.76
1000 - not working
1/4 - 12.453
MPH - 107.50

I've only ran at 2 tnt nights, at the end of our season and 107 mph is the quickest and then as the air gets cooler and damp, the MPH slows to 106. Does this mean I should drop down a couple jets?

Tires are like new Goodyear 29x10 slicks, that I had set at 12 psi for that pass. I left off idle. Made 3 passes that night. My 2nd pass the 60' was 2.380...spinning bad, I left at about 2500.... left off idle again on the 3rd pass and the 60' was back to 1.805.

Hard for me to tell how bad it was spinning, it just feels slow and smooth. Either way, I will do a little suspension work to help with the consistency needed for bracket racing. I am sure I can get another tenth or 2 off the 60'

I am still stumped as to why the MPH isn't there?? Besides not having full throttle, what else could it be? Where could I lose that much power...it works out to over 100 hp?
The trans shifts hard and feels good, I have tried a couple different convertors and it made no difference. Rear end is fresh. Front brakes did have quite a bit of drag, but I reduced the drag and it didn't help either. I am stumped.
I haven't played with timing yet, because it liked 36 degrees on the dyno, so I left it. But I don't think timing would effect MPH...would it??
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Old 10-22-2011, 11:53 PM   #58
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Default Re: Something's not right???

Will it hurt the power steering system at all if I run it at the track with out a belt?
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Old 10-22-2011, 11:53 PM   #59
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Default Re: Something's not right???

Without reading all posts have you tried jetting it up at all?
Whats your fuel pressure going down the track?
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Old 10-23-2011, 12:16 AM   #60
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Default Re: Something's not right???

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Originally Posted by mrmooney View Post
Without reading all posts have you tried jetting it up at all?
Whats your fuel pressure going down the track?
No, I haven't played with jetting yet, but I will.

I have it set at 6 psi and don't have a guage I can see going down track. But I run stock fuel lines to reg, so I probably should check to see where it's at down track.

Would it going lean, cause low MPH?

Thanks.
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