DragRaceResults.Com    Bracket Talk    Bracket Talk Forum  Hop To Forum Categories  Tech Talk - by Abruzzi    Possible 7al-2 problem question
Page 1 2 
Go
New
Find
Notify
Tools
Reply
  
Possible 7al-2 problem question
 Login/Join
 
johnracer
DRR Sportsman
Picture of johnracer
posted Hide Post
I had a 7al2 do something similar years ago. I also had a worn distributor gear do it. I wasnt running a crank trigger at that time though.

Do you have access to a msd tester?
 
Posts: 51 | Location: Rifle Colorado | Registered: June 06, 2010Reply With QuoteReport This Post
CURTIS REED
DRR S/Pro
Picture of CURTIS REED
posted Hide Post
quote:
Originally posted by johnracer:
I had a 7al2 do something similar years ago. I also had a worn distributor gear do it. I wasnt running a crank trigger at that time though.

Do you have access to a msd tester?


This box was in the car when I purchased it so I really don't know how old it is. If my testing Saturday doesn't show anything fruitful I will probably just put a new one in and have this one repaired for a spare, or to sell.



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

2018 Div4 Goodguys Hammer award winner
 
Posts: 3149 | Location: KIEFER, OK. | Registered: August 17, 2007Reply With QuoteReport This Post
Curly1
DRR Top Comp
Picture of Curly1
posted Hide Post
I recommend having a spare. I have had several go bad.........

Techwest has repaired three for me but he is hard to get a hold of. All worked perfect after he did them.


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: 4285 | Location: United States of Texas | Registered: April 02, 2011Reply With QuoteReport This Post
Goob
DRR Pro
Picture of Goob
posted Hide Post
quote:
Originally posted by CURTIS REED:
So I have been chasing a problem on my car and haven't been able to test enough to find it. Points races and Covid stoppage has me behind.

At around 7100-7200 my car will act just like it's on a rev limiter. I have to shift at 6900 and can't run 1/4 mile. Has anyone ever seen an ignition box act like that.

Things I have done:
New crank trigger pick up.
New distributor.
Shimmed springs first then changed springs.
Carb is different but have o2 data anyway.
I use a 3 step and have pulled the high side chip.
Made sure trigger wires are away from anything.

I was going to test Friday but they cancelled. I plan on pulling the three set plug out of the box. Other than that I will change the ignition as a last resort.


Yes!! 7-AL2 was "scattering" sparks, we discovered it trying to time the new engine.


"Despite the high cost of living, it remains popular."
Dave Cook
N375
 
Posts: 1842 | Location: Indy | Registered: November 21, 2008Reply With QuoteReport This Post
CURTIS REED
DRR S/Pro
Picture of CURTIS REED
posted Hide Post
Got to make 1 pass last night with the 3 step pulled completely out and started popping right at 7200 again.

Saw on data recorder that it was showing 29lbs of oil pressure that run so I put it up. I think it’s bad info but have to check it out.



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

2018 Div4 Goodguys Hammer award winner
 
Posts: 3149 | Location: KIEFER, OK. | Registered: August 17, 2007Reply With QuoteReport This Post
MasRacing
DRR Sportsman
posted Hide Post
Not sure if you have access to an MSD tester. If you think the rev limiter is activating you could test that without wasting more test runs. If its a rev limiter falsly activating the tester will cut out above that rpm. While it wont let you test for a miss you may be able to prove or eliminate 2 step without going to the track.


B.J. Masiello
 
Posts: 250 | Location: Connecticut | Registered: November 27, 2007Reply With QuoteReport This Post
CURTIS REED
DRR S/Pro
Picture of CURTIS REED
posted Hide Post
quote:
Originally posted by MasRacing:
Not sure if you have access to an MSD tester. If you think the rev limiter is activating you could test that without wasting more test runs. If its a rev limiter falsly activating the tester will cut out above that rpm. While it wont let you test for a miss you may be able to prove or eliminate 2 step without going to the track.


Probably a good idea. I will have time to send it to MSD now. Engine is coming out. At the very least I wiped the coatings off and started to get into some bearings.



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

2018 Div4 Goodguys Hammer award winner
 
Posts: 3149 | Location: KIEFER, OK. | Registered: August 17, 2007Reply With QuoteReport This Post



  Powered by Social Strata Page 1 2  
 

DragRaceResults.Com    Bracket Talk    Bracket Talk Forum  Hop To Forum Categories  Tech Talk - by Abruzzi    Possible 7al-2 problem question

© DragRaceResults.com 2024