DragRaceResults.Com    Bracket Talk    Bracket Talk Forum  Hop To Forum Categories  General Discussion - by FTI    Spark plugs... alky vs race gas
Page 1 2 3 
Go
New
Find
Notify
Tools
Reply
  
Spark plugs... alky vs race gas
 Login/Join
 
DRR Trophy
posted
Going from race gas to alky...is it IMPERATIVE to change plugs, i.e., colder? 10.8 to 1, sbf, 480 HP. Up to now, 3924 Autolites are working just fine. Nice tan color and never a problem. Why should I change?
 
Posts: 88 | Location: Mooresville, nc | Registered: October 11, 2013Reply With QuoteReport This Post
DRR Trophy
Picture of Bart Nelson
posted Hide Post
I would use 1 heat range hotter than required for gas/compression and .030 gap


2008 Summit Super Pro ET National Champion
Bart's Dominator Service
 
Posts: 10 | Location: houston | Registered: November 23, 2008Reply With QuoteReport This Post
DRR Top Comp
posted Hide Post
What Bart said. ^^^^^


Clowns to the left of me, Jokers to the right. Here I am.......
 
Posts: 5334 | Location: stuck in the middle with you! | Registered: March 11, 2002Reply With QuoteReport This Post
DRR S/Pro
Picture of CURTIS REED
posted Hide Post
Why would you go hotter than your gas set up???



____________________________
2017 and 2018 Osage Casinos Tulsa Raceway Park No-Box Champion

2018 Div4 Goodguys Hammer award winner
 
Posts: 3139 | Location: KIEFER, OK. | Registered: August 17, 2007Reply With QuoteReport This Post
DRR Pro
Picture of Roger McGinnis
posted Hide Post
I would go one step colder with methanol.



ΜΟΛΩΝ ΛΑΒΕ
 
Posts: 561 | Location: Republic of Texas | Registered: January 16, 2011Reply With QuoteReport This Post
DRR Top Comp
Picture of Curly1
posted Hide Post
Why hotter?

Why colder?

Like to know your reasoning. I run same with gas or alcohol but have not done any testing with it.


https://postimg.cc/gallery/np3zpruo/
"Dunning-Kruger Effect"
-a type of Cognitive bias where people with little expertise or ability assume they have superior expertise or ability. This overestimation occurs as a result of the fact that they do not have enough knowledge to know they don't have enough knowledge.

Before you argue with someone ask yourself, "Is this person mentally mature enough to grasp the concept of a different perspective?" If not there is no point to argue.

4X NE2 CHAMPION. 2020 TDRA NE2 Champion
 
Posts: 4265 | Location: United States of Texas | Registered: April 02, 2011Reply With QuoteReport This Post
DRR S/Pro
posted Hide Post
I would "think" hotter. People are always complaining about being able to build heat in an alcohol engine, starting it on gas. If you're not putting as much heat in the cooling system you must not be building as much heat in the combustion chamber. But that just logic, those that run alcohol will know better.


Illegitimi non carborundum
 
Posts: 2367 | Location: OKC, OK | Registered: February 15, 2008Reply With QuoteReport This Post



DRR S/Pro
posted Hide Post
I believe you run hotter to keep plugs from fouling. Plugs foul easier on alky than gas from what I hear.
 
Posts: 2595 | Location: at the track | Registered: May 09, 2007Reply With QuoteReport This Post
DRR Sportsman
posted Hide Post
spark plug heat range has little to do with actual engine temperature; lots to do with how well the spark plug dissipates heat. Read your plugs and they will tell you if you need hotter or colder. Mine didn't want anything different than it did with gas, similar experiences with many other cars but everyone's stuff is different.
 
Posts: 540 | Location: central Ar | Registered: June 21, 2002Reply With QuoteReport This Post
DRR S/Pro
Picture of CURTIS REED
posted Hide Post
Guys here is a really good read.

https://www.enginebuildermag.c...ark-plug-heat-range/



____________________________
2017 and 2018 Osage Casinos Tulsa Raceway Park No-Box Champion

2018 Div4 Goodguys Hammer award winner
 
Posts: 3139 | Location: KIEFER, OK. | Registered: August 17, 2007Reply With QuoteReport This Post
DRR Trophy
posted Hide Post
I have been running alky since the early 90's and have had probabally 10 different combos. 388 small block to 572 big block. Carburated and injected and chased the plug heat range thing. I found little if none in performance gains. Nothing big at all. Now all the combos were from 13.5 to 14.8 compression, 110 to 114 lobe separation cams and 6300 plus converters. NGK, Autolite,Accell,AC delco and Champion. Now I did find that some combs liked projected tip better and go figure one more step as I hed to index the plugs on those motors. Also timming between 28 and 34 degrees. But I hope more people respond as this was just my own experience and no dyno time just on the track. There has to be some on here that have hours of dyno experience in this area that can shed light in this area.
 
Posts: 321 | Location: ohio | Registered: June 06, 2006Reply With QuoteReport This Post
DRR Trophy
posted Hide Post
IM WITH SLICKSTER ON THIS ONE SAME KIND OF EXSPERIENCE WITH DIFF COMBOS AND PLUGS
 
Posts: 65 | Location: central indiana | Registered: May 16, 2016Reply With QuoteReport This Post
DRR Pro
Picture of Alaskaracer
posted Hide Post
What I've been told is to run the coldest plug I can that will still fire the mixture.....


Mark Goulette
Owner/Driver of the Livin' The Dream Racing dragster
www.livinthedreamracing.com
"Speed kills but it's better than going slow!"
Authorized Amsoil Retailer
 
Posts: 1538 | Location: Back home in Alaska! | Registered: February 13, 2011Reply With QuoteReport This Post
DRR Trophy
posted Hide Post
Just for everyones information alcohol does not foul plugs. It carries electricity. Gas does not.
 
Posts: 65 | Location: home | Registered: February 04, 2005Reply With QuoteReport This Post



DRR S/Pro
posted Hide Post
quote:
Originally posted by irf3:
Just for everyones information alcohol does not foul plugs. It carries electricity. Gas does not.

I am sure to most of us if the plug isn’t firing then it is considered fouled. A soaking wet plug is considered fouled in my book.
A hotter plug will stay dry better and keep firing properly. Too hot of plug can cause destination by firing the mixture before the plug fires.
 
Posts: 2595 | Location: at the track | Registered: May 09, 2007Reply With QuoteReport This Post
DRR Trophy
posted Hide Post
Methanol A/F is richer and a tighter plug gap works better in my experience. .022-.024 works for us with the GRID and 8261 coil.

Our A/f on the RP is approximately 5.0 using a NGK -7 plug 13.5cr with Enderle fuel injection.

The OPs CR is on the low side so i would error a little hotter.

Now throw in the discussion on water temp with this too.


1.34 9.42@ 142.41 1.29 5.97 @ 114.00 @ #3251 Better in 2022
427 BBC by S&S Speed Center, AFD, Enderle MFI by Spud Miller
Trackside Products, Sepanek Racing T400, Dynamic converter, Autoweld, Santhuff, Smith Racecraft,
His real name is Richard but they call it "**** Fords Body Shop"
 
Posts: 108 | Location: upstate NY | Registered: January 15, 2018Reply With QuoteReport This Post
DRR Pro
posted Hide Post
quote:
Originally posted by mavman:
spark plug heat range has little to do with actual engine temperature; lots to do with how well the spark plug dissipates heat. Read your plugs and they will tell you if you need hotter or colder. Mine didn't want anything different than it did with gas, similar experiences with many other cars but everyone's stuff is different.
.......Exactly.....


Fellow racer and servant of the Lord of Lords
John 14:6
"Creekside Racing Ministry"
MFI system, ProCharger Non-intercooled [6.02 @ 229 or 3.91/660' soft tune and killing power above 6K rpm]
Ron Clevenger
 
Posts: 1006 | Location: Visalia, Calif. 93292 | Registered: November 23, 2000Reply With QuoteReport This Post
DRR Pro
posted Hide Post
quote:
Originally posted by Coloradoracer:
What I've been told is to run the coldest plug I can that will still fire the mixture.....
.......Wrong direction...


Fellow racer and servant of the Lord of Lords
John 14:6
"Creekside Racing Ministry"
MFI system, ProCharger Non-intercooled [6.02 @ 229 or 3.91/660' soft tune and killing power above 6K rpm]
Ron Clevenger
 
Posts: 1006 | Location: Visalia, Calif. 93292 | Registered: November 23, 2000Reply With QuoteReport This Post
DRR Top Comp
posted Hide Post
quote:
Originally posted by 62Galaxie:
Going from race gas to alky...is it IMPERATIVE to change plugs, i.e., colder? 10.8 to 1, sbf, 480 HP. Up to now, 3924 Autolites are working just fine. Nice tan color and never a problem. Why should I change?


Depends on the octane of the gasoline. Colder plug makes for a larger window to advance the timing. Methanol, power is heat in the chamber. The engine you're working with is low compression, so what fuel did you use to produce the current plug reading you're basing your question on?
 
Posts: 9398 | Location: Madeira Beach Fl. | Registered: June 12, 2018Reply With QuoteReport This Post
DRR Pro
posted Hide Post
quote:
Originally posted by Mike Rietow:
quote:
Originally posted by 62Galaxie:
Going from race gas to alky...is it IMPERATIVE to change plugs, i.e., colder? 10.8 to 1, sbf, 480 HP. Up to now, 3924 Autolites are working just fine. Nice tan color and never a problem. Why should I change?


Colder plug makes for a larger window to advance the timing
.....I would have a different opinion on that.


Fellow racer and servant of the Lord of Lords
John 14:6
"Creekside Racing Ministry"
MFI system, ProCharger Non-intercooled [6.02 @ 229 or 3.91/660' soft tune and killing power above 6K rpm]
Ron Clevenger
 
Posts: 1006 | Location: Visalia, Calif. 93292 | Registered: November 23, 2000Reply With QuoteReport This Post
  Powered by Social Strata Page 1 2 3  
 

DragRaceResults.Com    Bracket Talk    Bracket Talk Forum  Hop To Forum Categories  General Discussion - by FTI    Spark plugs... alky vs race gas

© DragRaceResults.com 2024