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Topics - msundstrom

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1
Matt Shaff's Engine Shop / Cylinder/Ring Wear Issue
« on: October 23, 2017, 03:16:09 PM »
What is causing the etching at the top of the cylinder and the small scratches? Are they related? This is a 505 BBC on 45% Nitro. After 3 passes cylinder leakage was 8%, after 17 passes it ranged from 14% to 28% with no oil on the plugs but down on power. All eight cylinders/pistons and rings look the same and the top ring is very worn but the second looks great. The ring ends have not been butting and there is no signs of detonation on the piston, spark plugs nor the top rod bearings.
Thanks
Mark S

2
Spud Miller's Cave / Nitro Respirator
« on: September 13, 2017, 04:57:46 PM »
Spud,
What is a good full face respirator that will filter nitro/toluene fumes?
Thanks
Mark S

3
Roo Man's Room / Tube splice length
« on: July 09, 2016, 11:32:05 AM »
When spicing two tubes of the same diameter with an inside tube sleeve is there a minimum length for the inside tube, I found lots of aircraft info but don't know if that applies to dragsters?
Thanks
Mark S

4
Spud Miller's Cave / Pump feed line
« on: December 13, 2015, 09:29:51 AM »
Hi Spud,
If you had a 6 GPM pump and fed it with a -10 line vs. a -12 line is there any advantage or disadvantage to ultimate pump output?
Thanks
Mark S

5
Spud Miller's Cave / Setting Hi-speed bypass
« on: October 19, 2015, 03:47:33 PM »
Hi Spud,
If I need to set my Hi-speed in the 120's psi but my air pressure source is maxed at 110 psi, what is my alternative source?
Thanks
Mark S

6
Spud Miller's Cave / Toluene and % Nitro
« on: August 08, 2015, 10:09:37 PM »
Spud,
I have been using 1 qt. toluene per 5 gallons of 30%, how much on 50%. Is there a formula?
Thanks
Mark

7
Matt Shaff's Engine Shop / Intake valve stem seals or not
« on: February 10, 2015, 10:43:08 AM »
Intake valve stem seals or not on a NA iron head application. Have run with them both ways and have not seen any advantage or disadvantage as long as VS clearance is good. Experiences, observations?
Thanks
Mark S

8
Matt Shaff's Engine Shop / Copper head gasket
« on: January 05, 2015, 09:32:12 AM »
Are there any issues good or bad with having more or less exposed copper to the non quench areas (combustion chamber)? With a smaller ID gasket does the smaller quench area have any effect on combustion efficiency and power?
Thanks
Mark S

9
Spud Miller's Cave / Pump Limit
« on: January 04, 2015, 08:17:30 PM »
Hi Spud,
If I'm at a .110 pill at 30%, can I get 50% on a theoretical .060 pill and be at peace or am I about out of pump?Pump is 6.1 GPM @ 4000
Thanks
Mark S

10
Spud Miller's Cave / Where to start?
« on: December 14, 2014, 06:53:45 PM »
Spud,
So I added 40 cubic inches to my engine so do I start over with a methanol baseline and then adjust from there as I increase nitro % or pull some timing out and fatten up my previous 30-40% tuneups and adjust from there? I've compared pill change trends on your calculator and it does not seem to be that much richer.
Thanks
Mark S

11
Spud Miller's Cave / Piston clearance for Nitro
« on: November 07, 2014, 12:09:30 PM »
Spud,
What piston to cylinder wall clearance are you running?
Thanks
Mark Sundstrom

12
Spud Miller's Cave / Nitro and engine size
« on: January 14, 2014, 05:34:56 PM »
Hi Spud,
Does nitro have a preference in bore/stroke combinations? 4" stroke vs. 4.25" , shorter stroke/bigger bore, longer stroke/smaller bore, does size matter?

Thanks
Mark S

13
Matt Shaff's Engine Shop / Piston rings
« on: January 13, 2014, 04:56:14 PM »
What is a good piston ring set for a NA BBC on nitromethane?
Thanks
Mark S

14
Spud Miller's Cave / Toluene Amount
« on: November 26, 2013, 08:14:25 PM »
Hi Spud,
Is there a formula for the amount of toluene to add as the % of nitro changes?

Thanks
Mark S

15
Matt Shaff's Engine Shop / Short block rotational torque
« on: November 08, 2013, 06:33:25 PM »
What would be a ballpark rotational torque value for a fresh cast piston, cast ring rotating assembly for a v-8. Specifically a 351W Ford.

Thanks
Mark S.

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