I'm hoping to do some prolonged WOT runs this winter, 1/2 to 3/4 of a mile. The temp will be around -10 c, and the altitude will be 0-800 feet (0-250m). How big of a main jets would I need to be safe? (if the dcs wasn't torturing me?)
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Jetted to 2001 specs should be more than safe for -10C.
148.8,148.8,150 in pto
148.8,148.8,150 in pto
Hm.. running 151,3 pto and 150 on the other two, and it's still blinking on a long run, even at -2c
Yes, I have read lots of your posts where you have DCS problems, I can only suggest, either yours is extra sensitive for some reason, or your fuel quality is less than we are comparing our jetting with here. I had mine jetted as yours is for a short time last winter, and it was noticeably pig rich, poor throttle response. So for some reason, I don't think comparing to peoples jetting on this side of the pond is maybe a good idea for yours?
yammiman
Member
This subject has been beat to death on this forum and the end result is always the same - jetting, jetting, jetting - Nor you are almost jetted for a big bore so you obviously have something else going on - I don't know exactly how the TPS works on these sleds, but I have always had a suspision that if it got out of adjustment (which I'm not even sure that it has adjustment) it would most definetly set off your DCS - I've had 3 02 SRX's and one of them gave me fits with the DCS - it never stopped going off until I had the clutching spot on??????? - call it coincidence or what ever you want, but the bottom line is there is more that effects the DCS (in my opinion) than just jetting - who knows, maybe the sensor itself could be bad - I guess I would unhook the thing, and start jetting the old fashion way by plug color and piston wash - get that right, then hook the damn thing back up and see if it goes off - clean and simple - if it is still going off, then something else is the problem - other post on here suggest that jetting is the only thing that effects detonation - well jetting, timing, air tempurature, humidity, barometric pressure, and coolant tempurature all effect detonation along with octane - do a process of elimination and sooner or later you will find the problem!!!
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SRX's don't like to be run lean. We found that they would go lean on hard long runs across the lake. The stock exhaust draws hard when hot. 151's and 152's are not out of the question. On a stocker !!!norwegian said:
yammiman
Member
Nor - maybe your sled has a big bore on it and you just don't know it!!! LOL
I wish !!! 
YAMMIEGOD3:16
Active member
THAT SHURE WANT TO BE LEAN ON THE GRASS. lol!!!!!! 3:16 (yammie tony)DennistheMenaceRacing said:
do you guys have ethanol in your gas???norwegian said:
YAMMIEGOD3:16 said:
Yep the 135 mains straight across never ever failed me once!!!
Never detonated on me in 500 feet one single time.
To run those in the winter though would be suicide..
No ethanol in the gasSRXMAGIC said:
yammiman
Member
My current 02 is jetted in between 01 & 02 specs, it has a Heavy Hitter clutch set-up that is spot on, and a Hauck can - my cabin where I ride is around 1000' - I (along with others on this site) am a strong advocate of blending race fuel - when I do any long WOT runs down the county road, I always have a race fuel blend and the sled will bury the speedometer - that is with a stock helix!! - it is the only SRX I have owned that has done that - it absolutly loves around 94 octane - now my last 02 was jetted the same, had a Heel Clicker set up, and a MBRP can - no matter what fuel I put in it, I couldn't keep the DCS from coming on - for a long time, the sled had an over rev on the bottom and the RPM's dropped off on top - it wasn't until I got the clutching spot on that the light quit coming on!?!?!? - this was not just one day to the next, it was over a couple month period - I don't know if the over rev was triggering some detonation or what, but that is how it was - I think I would jet it, like I said before, the old fashion way with the DCS unhooked - get it spot on, and hook the DCS back up - if it still goes off, I would take to a dealer and have the system checked - just my 2 cents!
Do you use any of the following race fuels? Maybe I should give it a try, I have found out that race fuel is locally avaiable:
http://www.freewebs.com/diabloracingteam/sponsorerfuelspes.htm
BTW, what about the system can/should one check?
The sensor seems to be working, the dcs lamp blinks 3 times at startup.
TPS adjustment is checked and corrected.. What other things are there?
Thanks
http://www.freewebs.com/diabloracingteam/sponsorerfuelspes.htm
BTW, what about the system can/should one check?
The sensor seems to be working, the dcs lamp blinks 3 times at startup.
TPS adjustment is checked and corrected.. What other things are there?
Thanks
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As soon as you increase your octane level your light problems are going to go away.
Which of the fuels should I buy?
260 gt plus, 104octane, what i would do is mix this with your premium gas, say a 60/40 ratio, 60 being the pump gas and 40 being the race fuel, then try it and see, should solve all your issues.
yammiman
Member
Nor - here is a formula that works good for blending - it is (#oct x gals) + (#oct x gals) / total gals = oct - an example using the (r+m)/2 rating and a ten gallon tank and a 60/40 mix - (91 oct x 6 gals) + (104 oct x 4 gals) / 10 gals = 96.2 octane - I'm assuming the GT octane is (r+m)/2 - when I go to the strip with my car I measure it excactly and keep notes and check the time slips - it will start slowing down when you get too much - just like jetting!
As far as getting the system checked, all I was refering to was the DCS system - I don't know that they are 100% problem free - have you checked your plugs and piston wash? - I would be real curious about that - good luck
As far as getting the system checked, all I was refering to was the DCS system - I don't know that they are 100% problem free - have you checked your plugs and piston wash? - I would be real curious about that - good luck
I guess I haven't checked the plugs or piston wash, but I'll try the race gas. Thanks for the advices 
Btw, are race fuels extremly poisonous, compared to regular fuel? I've heard of some guys who had some kind of a fuel in their race sleds that could make you infertile in an instant or something.
Btw, are race fuels extremly poisonous, compared to regular fuel? I've heard of some guys who had some kind of a fuel in their race sleds that could make you infertile in an instant or something.
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Its when people add toulene, acetone, other misc chemicals to the gas that it becomes really toxic.