dyno #s with 91 octane..
Thread Starter
TECH Enthusiast
Joined: Oct 2005
Posts: 595
Likes: 0
From: Miami, FL
dyno #s with 91 octane.. I've been putting 89 in my car lately due to lack of money and lack of job. My tank is down to a half and I'm going to a dyno tomorrow, I'm going to fill up the other half with 93 octane. The mix should be about 91 octane, I guess. Should I dyno it like that, or run my tank down alittle bit more and add 93, or should I just put in as much 93 as I can and add some octane booster?
you should dyno tune with the type of gas you use all the time. if you raise you octane by better gas, when you put 89 back in it will not run right. If you always use 89 then put in 89 and tune for it.
Just a question but if your borke why are you dynoin? but other than that i agree if you ru around with 89 you might get some knock retart that will cost some power and the dyno will tell you what you really have on the street not the max your motor will make.
TECH Apprentice
iTrader: (1)
Joined: Apr 2005
Posts: 375
Likes: 0
From: Long Island NY Portsmouth NH Sometimes CT
although the compression isnt way high i always ran with the highest pump gas with my stock ls1....octane booster isnt as effective as advertised....on the pump if its calculated octane is the (R+M)/2 method octane booster will be theoretically half of what it advertises...since it raises 1 rating by say 10 points....i have also read about dropping air inlet temp by around 25* and you can lower the octane by 1 point...maybe its not as drastic as 25* but either way your running a performance motor you should use premium....knock sucks...
I look at gas like this... the difference between regular gas and premium is about 20 cents a gallon. If my tank (26 galllons) was completely dry, the difference from one to the other is only $5.20.
Silly isn't it?
Silly isn't it?
Thread Starter
TECH Enthusiast
Joined: Oct 2005
Posts: 595
Likes: 0
From: Miami, FL
well its not silly if the car runs pretty much the same with 89 as it does with 93 (I have never experienced knock, but if the car has cut back on timing I haven't noticed much of a decline in performance either), and I'm short on funds until I can manage to land a job somewhere. Also, it's not a dynoTUNE, I'm just getting some numbers. The reason I'm doing it now is that theres a dynoday and it's a jet, not a mustang.
Trending Topics
TECH Enthusiast
Joined: Dec 2005
Posts: 590
Likes: 0
From: Scottsdale, AZ
Originally Posted by mpe488
well its not silly if the car runs pretty much the same with 89 as it does with 93 (I have never experienced knock, but if the car has cut back on timing I haven't noticed much of a decline in performance either)
Just feed her the good stuff.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
