Doh...I am a dufas..EFI discovery

[69MyWay]

Killer has had a little dry spot on the upper RPM every since I put the package together. No big deal, and nothing a little dyno time would not cure.

Well now I am pushing 5,000 miles on the car since I put it together, and am becoming more in tune with the car to be better at programming the EFI system.

For those that don't know, I copied Edelbrocks 539 hp .060 over 454 with RPM aluminum heads, RPM cam, 9.6:1 speed pro pistons, and big tube headers, etc.

I was fooling around with the programmer tonight while Nikki was dropping off a block buster video. I found I had the REV LIMITER set WAY LOW! It was kicking in at 5,500 RPM.

This car comes on strong, and quick. It hits 5,500 very fast, then it would kind of break up and hit that dead spot...well DUH!

Anyway, I cranked it up to 6,500 and Ohhhhhh Mamma!!!!!!!!!

I also made several other minor tweaks. OMG!!! I now know the 335 30 ZR 18 pilot sports on the rear are not going to last long!


BTW---the Richmond six is coming soon!

 

[69MyWay]

I forgot to mention, I am running the Edelbrock PRO FLO multi port EFI system.

 

[Ken]

Now maybe that explains the low numbers on the dyno last year at BG. :confused

_ken

 

[matchframe]

Wow, its amazing what a difference 1,000 RPM will make!

How does the programmer work? Do you just hook up a laptop to your engine computer?

Be careful now, they give tickets for "Exhibition of Acceleration"


Bill

 

[Jack]

For those that don't know, I copied Edelbrocks 539 hp .060 over 454 with RPM aluminum heads, RPM cam, 9.6:1 speed pro pistons, and big tube headers, etc. I am running the Edelbrock PRO FLO multi port EFI system.

Chris:
I understand killer is primarily a street car. Also understand you have programmable management. What is lowest octane and brand of pump gas you've successfully (little or no knock) run?
JACK:gap

 

[69MyWay]

The Pro Flo does not require a lap top. It has a dedicated program and diagnostic module that can be docked into the main computer for tuning and viewing of critical engine stats.

I have pretty much kept 92 or 93 octane in the car since the start.

Knock sensors are difficult little monsters. They are wonderful for total engine control. However, they tend to create false positive signals. For example, just headers in general, loose motor mounts, accessory noise, roller rockers, etc. etc, can create engine noise that can often be mistaken for a ping to the sensor.

They are good to tune with on bone stock cars, because you have a well established base line from other stock cars of what to expect in terms of back ground engine noise that can cause a false positive trigger of the timing.

The Pro-Flo uses a wide band style reading off the heated O2 sensor to let you know when you are lean/rich, or dead in the middle. Therefore, you tune on that, and if you are careful to evaluate it, you won't put the car in a detonation situation.

So, sorry for the long response, but to answer your question plain and simple, there is no knock sensor circuit on the Pro-Flo, unlike many of the other aftermarket systems.

BTW--ask anybody, even KEN about the troubles he has had with his old knock sensor system in his freaky 400 plus cid 87 Vette. I went to the dyno with him, and had a heck of a time trying to read and adjust the timing, as the knock sensor kept picking up back ground engine noise and attempting to retard timing at the wrong time.

 

[silver 80]

I had heard that the LT4 knock sensor is the sensor to get because it's not as sensitive