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Topics - wideopen231

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Spud Miller's Cave / electric primer pump ?
« on: November 06, 2019, 04:03:23 PM »
Ok . I have a facet pump hooked up on injected motor using for primer system. Car cranks fine after little tuning. Use for cranking only right now.

Issue I think I am having is when shutting motor off. I pull fuel shut off,motor revs up as should before shutting o0ff,except it keeps running and running(no batteries here). I am thinking the vacuum maybe pulling fuel thru the electric pump. Pump is about 12" from main line from tank and mounted low so as to keep it wet for easy priming.Line from pump goes to a jetted line that's in middle of injector with 4 spray holes drilled in it that spray up ward and mix with incoming air.

Anyone have issue with fuel being pulled thru pump?

Front Engine Dragsters / stage rpm vs stall and wheel speed
« on: October 28, 2019, 04:37:07 PM »
Anyone have any data on how much quicker wheel speed is or isn't,if you stage lower and give engine a run at tires. In other words let it get running up to stall more should give hard hit in theory which we all know how that works out some times. Its done some in pro mods with auto and thinking it might help get wheel speed up quicker on bracket deal also in case of shake issue.

Spud Miller's Cave / nitro % and motor cleansing
« on: September 25, 2019, 05:28:31 AM »

Is it near as critical to cleanse the motor(blow out all fuel when running lower(under 30%)  mixure. Having worked on some A/FUEL CARS i AM USE TO IT BE RELIGIOUS . Complete blow down between rounds of at some local stuff could be trick.Not that I plan on running it often,but it will happen,LOL

Matt Shaff's Engine Shop / maintaining finish on magnesium
« on: September 01, 2019, 08:12:47 AM »
Wondering if anyone knows of good product to maintain finish on magnesium,especially valve covers?

Front Engine Dragsters / negatives of FED as bracket car?
« on: July 03, 2019, 06:27:56 PM »
Ok first I know we have had threads about bracket racing a FED. Is it the choice of cookie cutter crowd?No. Is it easiest to get tune up info on,heck no. Is it cool? xxxx yes. Can it be just as consistent as a four link RED? I think so,with proper prep and tuning. Have been told from day one( alot of days between then and now too) a FED is wrong for bracket racing and can not win on anything but a fluke day. Reason I asking here is site is FED's and not a bunch of do as everyone else or you don't have a chance bracket racers only site.Maybe short cut learning curve.Yes I know getting it on track would too.Trying for end of August once heat dies down some,its just not my thing to  play in.

Question what would be the negatives or obstacle with a FED as a kick butt screw the names bracket race car?

Dan Dishon's Transmission Den / stall rpm change with tq change
« on: June 21, 2019, 05:26:15 AM »
 Some random thinking got me ot wondering. Is there a rule of thumb for how much stall will increase with x amount of tq increase.

Reason. Wondering how much stall speed wil increase with tq increase from load of nitro. I know ideal would be half dozen converters for each comb,but being rich is ideal too and not working(YET). After few post about tires and needing to get wheel speed I started thinking(usually not good) a little more tq would get more wheel speed if all other approaches failed. Can run numbers on Spuds TQ calculator. Knowing how much stall I might change will help figure where too much is just extra fun.

Spud Miller's Cave / pump rebuild
« on: June 20, 2019, 07:00:40 PM »

Have question.I have a 1100 in need of repair.Can it be built to a lower gpm pump. Looking to get it down to around 11 gpm or so.

Front Engine Dragsters / new injector (pics added)
« on: June 07, 2019, 06:54:41 PM »
 While not as pretty as Racin Jason's  its going to have to do for while. First design was .060 and middle was pulsating while idling .This one is .190 tube with butt load of welding. Still got some polishing to do,but getting close to being finished  Like I said not as pretty as wanted and heavier than would like,but hey its not like anyone else's.LOL

Spud Miller's Cave / pump under drive?
« on: May 05, 2019, 05:54:35 PM »

If have apump too big for need. Whats best way to figure under drive ratio. I have cpl old Waterman under drive sitting here  different ratios. I have a 85. gpm pump.Too big for injected alky w/o going either bigger on main than I want or small nozzle and higher pressure. It will work great when I get set up and want to throw a high percentage load to it. Need few other parts first and thats after new trailer. May be have to have two complete systems I can swap from alky to nitro,just checking options and trying to make most versatile with fewest changes possible.
  Any rule of thumb for figuring pump out put with under drive.Linear or just totally changes chart characteristics?

Front Engine Dragsters / reason you choose a FED?
« on: April 30, 2019, 03:33:04 PM »
 Question asked of me while back. WHy the heck did you build a FED? Especially for bracket racing was second part. Understand most here are not for brackets.Figured would make a fun post.

Me first/ Al;ways wanted one and always get what I want regardless how ling it take. Cool as xxxx! Plus being like 360 RED's or be only FED.I will take only any day.

Spud Miller's Cave / typical weather swing effect nitro mixture
« on: April 21, 2019, 08:04:13 AM »
  First I know all combo will differ.Looking for a parameter more or less. How much weather swing  makes  performance change. Example My old setup I never worried about anything less than 500' correct Alt. and/or 15 grains water. If on line I would adjust according.  When running a mixture I figure to be 25% give or take if that makes big difference. I know nitro has bigger window due to AFR and should  increase tuning window over straight alcohol. A rule of thumb will work here too.

Spud Miller's Cave / quick pump check up system
« on: April 16, 2019, 01:28:47 PM »

Question and if rather not answer as it is part of livelihood I understand.
I Want to build a quick check system,setup or what ever want to call it. So I can check pump  for loss. I have 30 plus years reading water and air flows and butt load of meters,gauges and flow valves. Thinking If I set it up so I can run pump at given rpm every time and read either total head)suction and discharge) or read drop across a orifice with know drop I would know if any change in pump. Have design for both just not sure which would work best for checking pump. My thinking is checking head pressure and running calculations might be best. Thoughts.

Roo Man's Room / pr jack style lift home built ?
« on: April 10, 2019, 06:25:15 PM »
 While not chassis or actually car related it is fabrication thing.

I know at least a few here have built there own home made version of Pro Jack style lifts for race car.

Working on shopping list for parts.Design looks pretty simple to build. Have found few iutems on ebay that might work. Wondering what foot control you may have used and size cylinders in jack. Most I am finding seem to be over kill and same with their sizing.

Before everyone jumps in on using someone else's design > I am pretty sure when I get done I will have changed more than I have used.I always do.LOL

Roo Man's Room / rule on electronic devices.
« on: March 22, 2019, 06:27:45 AM »
 I have not found anything that would make my oh crap button illegal,Basically its a electronic solenoid that controls air to solenoid to dump chute.  I can still just old fashion smack handle and do it. In case of something stupid it just allows me to be both hands on wheel while still throwing out the laundry. Asking because I have bad habit of skip reading and jumping over stuff I should be catching. Might be something in another section of rules that cover this.

Roo Man's Room / 5 1/4 ior 5 1/3" aluminum tubing
« on: March 21, 2019, 05:34:09 PM »
Looking for piece of aluminum tube to make drive shaft cover out of. I have a steel deal from a supplier. Have hated it from day one. Have a aluminum collar milled out to mount to trans and center section. just need tube. Anyone know of a supplier who would sell 2' or 3' piece?

Funny thing I have something that will work,not tickled with it. I made it from flat piece using to welding bottle strapped together and a 3rd bottle(nos and then fire bottle) in middle,me standing on middle until down then tighten strap more.Then straps around aluminum tightening till close to size. Close but not perfect like I want. Would have made dang funny video. What we will not try for a race car parts.LMAO

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