Thread: octane thread
08-09-2009, 08:52 PM #1
what's the highest octane a basically stock rxp can handle?
08-09-2009, 08:57 PM #2
what exactly do you mean handle? I would be more concerned with how low can it handle.
08-10-2009, 02:09 PM #3
+1 .... i never put anything lower then 93 in my RXP
08-10-2009, 05:54 PM #4
08-10-2009, 06:00 PM #5
- Join Date
- Oct 2005
No reason to run higher than 93 or 94oct for the majority of SCIC 4tecs out there. Just keep it at or above 91oct.
08-10-2009, 10:29 PM #6
can anyone explain why? thought any type of fuel additive would increase horse power. hotter burn right?
08-10-2009, 10:34 PM #7
08-10-2009, 10:39 PM #8
Basically higher octane means more resistant to pre-detonaion. For example high compression = high cylinder temp = fuel igniting before spark = less power. So you dont get more power with higher octane, just all the power you engine is able to make. hth
08-11-2009, 11:40 AM #9
my general rule of thumb....11:1 compression ratio is about when you want to start running 100 octane low lead...or a higher octane.... anything up to it will run premium just fine.. octane is the fuels ability to withstand pre-detonation (like someone said) yes if you're running a motor of 11.5:1 CR it will get more HP with a higher octane fuel for the simple reason that the fuel air mixture is not prematurely lighting off.. but with stock 4 tecs....premium is fine... on the compression ratio topic...has anyone ever thought of modding a 4 tec to run methanol?
Users Browsing this Thread
There are currently 1 users browsing this thread. (0 members and 1 guests)
By Green Hulk in forum Open DiscussionReplies: 43Last Post: 01-16-2008, 12:38 AM
By RM_RXP in forum 4-Tec PerformanceReplies: 20Last Post: 05-27-2007, 08:08 AM
By sse107 in forum 4-Tec PerformanceReplies: 6Last Post: 09-12-2005, 01:48 PM
By 05RXPnoob in forum Sea Doo Open DiscussionReplies: 0Last Post: 08-12-2005, 11:27 AM
By CRAZEDRXP in forum Sea Doo Open DiscussionReplies: 8Last Post: 05-27-2005, 12:44 PM