91 octane 93 chip?

[INEEDAGN]

The 87 GN I just bought has two chips for it. A Red Armstrong 93 street chip (no idea what timing), and a Lubrant chip 93 street 20 degrees timing. Both are supposedly for the combo the car has and they both say 42# for my 009's. The thing that sucks, is that around here 91 octane is all I can easily find at the pump. I may try to do some mixing, octane booster stuff later but right now I want to make sure it will run on 91. So can I keep the 93 chip(s) and just turn down the boost to a safe level or would I benefit from a chip for 91 octane crap gas? Any ideas as to what Red Armstrong's 93 street chips usually have for timing? Turbolink is on the way (I think, never got an e-mail confirmation) so I can make sure it's not knocking. Without higher octane or alcohol injection, what should I do? Thanks in advance.


bob

 

[Matt Weiser]

I asked Joe Lubrant a similar question about the 93 octane chip I bought used a while back. His reply is below. It's a chip for 30# injectors, but I think his advice will apply to you as well. HTH:

------------------------
Matt,

All 93 chips that I make have 20 deg. max wide open throttle
timing.
20 deg. at 17psi is a litlle to much with 91 and way to much
for 89 etc.
(Knock City).

I will think that 18 deg. would be much safer for 91 & 92, and
my personal
opinion is 89 is out of the question at the 16-17psi range. 91
maybe 15psi?
89, I wouldn't even try it.


If you run the 20 deg chip the boost must be dropped to some
safe level...and
every car is different.

Joe
-----------------

 

[INEEDAGN]

Thank you for the info. It's kind of what I expected to hear, but I'm still learning on these things so I figured I'd see what others thought. I guess I'll hunt for the RA timing numbers and if it's lower, I'll use it.

bob

 

[Taffy]

If you do not have a knock meter, get one. That is the only way that you will be able to tell if you are boosting too much.

I have a ay Carter chip with 19-20 (not sure) degrees timing. With the 91 here in Ca, I was able to run 14-15 psig boost. After I got the Power Plate, I was able to run up to 18 psig boost with no knock. It even got rid of the part throttle knock.

Check out a Power Plate if you can not get good gas.

 

[99Formula]

I have a 93 octane Ramcharger's chip that I can run about 17 psi on with a powerplate. We only get 91 octane here as well. My extender chip is burned for 92 octane and at night I can run nearly 20 psi on 91 octane with NO knock. This is with a TE-44 and 009's. I must say I'm a fan of the extender setup.

Peter

 

[Matt Weiser]

Thx for the extra info. This past weekend I finally installed that JL chip and my AFPR, and WOW, what a difference. I didn't mess with boost, just fuel pressure. I have boost set at about 14 psi and I dialed fuel pressure back to about 38 psi. Anyway, I'm getting no knock and my Scanmaster shows she's running pig-rich with readings of 820+ (and it smells like that, too). So I guess I need to turn the boost up! OK, I do get some knock on the shift, but everybody says that's normal. The chip also makes the car run much smoother, especially on cold startup, and I get earlier fan turn-on which is great with these summer temps that won't go away.

Oh, I do have a Power Plate, and it really does seem to make a difference.

My question for my fellow 91-octane sufferers is -- what fuel pressures are you guys running at your boost level?