Super Class rule clarification
 

Re: Super Class rule clarification
 

any means just short of using the ingnition..........a T/S, a bolt, just lifting, but no stutter.

Rick

Re: Super Class rule clarification
 

how about cutting fuel on an injection system? any problem with that?

Re: Super Class rule clarification
 

No Limiting RPM chip in the ignition during the run which is basically what Rick said no stutter.
My 2 Cents

Re: Super Class rule clarification
 

You can also use weigth to slow the E.T. the rule od thumb is every 10lbs is .01 and every 100lbs is .10 but there is a limit to how much removeable weight you can have so you would have to set the car up to run .10 to .20 under the index without any weight and add the weight as needed.

Re: Super Class rule clarification
 

Re: Super Class rule clarification
 

I would think if cutting fuel makes it stutter or pop and snap it would be considered a stutter and would not pass. if it cuts rpm without the stutter and is smooth sounding it may work .only thing is i would not want my fuel cut back and ruin a motor.

Re: Super Class rule clarification
 

Re: Super Class rule clarification
 

The guys that run the electronic fuel injection use a switch on the TS that tells the computer to run a different map profile while on the stop.

Re: Super Class rule clarification
 

Ok, I have a question on this.. I have heard many sides of electronic devices to control down track speeds....

Here is a question: IF my motor has a redline of say 7800rpm, and I use a 7500 rpm chip, lets say the car hits the high side chip at 1100' into the run...... You guys are saying this is not legal? So I am supposed to put a higher chip in and take a chance of over-reving the motor and breaking it????

Re: Super Class rule clarification
 

I have witnessed this one time and the driver was given the suggestion of changing the rear gears and not having the issue by NHRA tech.
The driver was warned as the limiter was a rpm limiting device before the finish line and was considered to be illegal used in that way. Limiter devices are considered safety devices by NHRA tech I would guess.
I was just parked nearby when the tech personnel visited the racer.
Just What I Witnessed

Re: Super Class rule clarification
 

No Freddie....you can't hit the chip on the high end....intentionally.....(it does work though)....but you would be turned in in Div 3...and I bet my Div 2 buddies wouldn't be happy either....

on the Fi question.....cutting the fuel is fine as long as you close the throttle some amount....with a linkage stop or something similar....just cutting the fuel would be suspect and sooner or later someone wouldn't like it....I'm not making the rules...only giving you my opinion....nothing else...

Rock

Re: Super Class rule clarification
 

Not intentional.. but I need the gear to get the car to leave and run the #'s, but for some reason the car hits the chip at around 1100'. I can prob. put a 500rpm higher chip in it and not hurt anything, but I dont like to run my FORD much over 7500 as it is...

I dont know how much of a issue it will be because I have never run it with a stop on it, and the car will definaly need to be slowed down.... I have been 9.2's so far, and thats with hitting the chip.

Re: Super Class rule clarification
 

Leave at lower rpm and short shift and or add weight.

Re: Super Class rule clarification
 

Freddie, what size engine and what gear do you run? I like you, run Ford engines in both my cars and without knowing what gear you are running find it hard to believe that by changing it you would have a problem cutting a light. In my ranger I ran a 4.29 gear and could go red anywhere, even on those .370 tree's. My thunderbird I run a 4.10 gear now, but had a 4.29 gear in it before and saw no difference at the tree. With that car I have had as many as 40 numbers in the box even with the 4.10 gear. A Ford engine makes more torque than a chevy so it can be geared different. Also it will make it's power at a lower rpm so if the truth is known you will run faster by regearing your car as well.
Chuck

Re: Super Class rule clarification
 

When I set the car up it was set up in NMRA H/S trim with a 363 small block that will easily take 8500+. car has a 4.30 gear in it now, and a little smaller 363, I could not justify spending the $$$ to try NMRA anymore as they have gotten WAY out of hand.

New motor I would like to keep around 7500 so it will last longer. Car is still running the 28x10.5's and sitting at 2650 race wieght. I changed converters this year also, I can go red on a .370 tree with no issues, car has been 9.teens, and usually runs through the traps at 8800. For local bracket racing I put a 7000 chip in it since almost everything brackets now is on the 1/8 it didnt matter... I was thinking about putting the 3.73's back in it, and just let it kill off the first 100' or so... then see how much more I need to slow it down to run S/G..

Re: Super Class rule clarification
 

First no race motor has an EXACT redline, just where it stops making power. Yes if you are hitting the chip it is illegal. Now there is no way for NHRA to police and / or prove that you are doing it for that far down track. I have raced a few people that do hit the high chip. (being faster car) You are making up no ground between each other, then you make a huge move late. Kinda screws you up. But YES illegal

Re: Super Class rule clarification
 

Chris: I realize there is no "SET" RPM limit on any motor, however when using FORD's you really dont want to push them much over 7500 for long unless you have a killer bottom end.... Unlike the Chevy, they just cant take the RRR's...

Like I also posted I dont know even if this will be an issue as I have not run the car on the stop yet, and will need to in order to run either S/G or S/ST..