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Discussion Starter · #1 ·
Ok Ive heard both ways as far as fuel tuners go. Here is my experience with the mods that I have.
1st-Cobra Dragsters: This was the only mod I had made so far and I noticed a hesitation and sometimes a hiccup with thes pipes.
2nd-Cobra PowerPro CVT tuner: This I actually installed with the Hypercharger . I noticed the same hesitation maybe slightly milder But did notice an overall power increase.
Now what Im thinking is these are the most free flowing exhaust offered along with the intake setup Im thinking I may possibly even be out of range for the PowerPro. I have a friend with a Raider(The WYOTech Guru) and pretty much says I wasted my money on the Tuner. Any Ideas now for getting rid of this hesitation.
 

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So the "wyotech guru" thinks you can run those mods without the tuner? He may need to go back to school... just saying... Does he think that any carb can go on any motor with out adjusting?

the only other option I see is if you go with the power commander and have it dyno tuned.
 

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look at it as the 500 you spent saved your motor from a melt down from being to lean. ya it may not be perfect and im sure cobra is working on it more and more. but if you want the intake and exhaust on there you need to account for the extra air. more air = more fuel = more power.

also take into account that anything "plug and play" isnt going to be as good and "plug and dyno" but if you take into account 500 for Cobra auto tune with maybe a hesitation somewhere or 250 or what ever the PCV is then add 500 to 1000 to have it tuned on a dyno. Ill take the Cobra for its ease of install and fact ya it may not be completely perfect but it will save the motor from a melt down and saved me some money in the long run.
 

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When you say hiccup do you mean like a little backfire if this is the case you may have to check your exhaust for leaks cause in might be sucking in air around the exhaust flanges. like when you put the pies on did you use new exhaust gaskets. Or did you believe the old ones were ok?
 

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Discussion Starter · #5 ·
I used new exhaust gaskets and torqued the studs to 25lbs. I couldn't find torque specs anywhere but it seemed plenty tight.
 

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wannagetrdone said:
I used new exhaust gaskets and torqued the studs to 25lbs. I couldn't find torque specs anywhere but it seemed plenty tight.
WOW thats almost 2x what it should be i don't know if it is possible that you cracked the gasket and maybe thats the problem maybe someone else can help?
 

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I have. Pcv I had few problems with it like when the dealership installed it they form't ground it to battery so called power commander they told me to hook up.to negitive to battery so I did and it helped some so spent 250 to.get tuned ran like a scolded dog for 2000 miles started popping and getting hot so I called power commander they told me to hook up computer up to it they see what they could do so they took and done tune it over the computer they fixed the.popping and heat problem I.not sure if cobra is same but tech support maybe help
 

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Yosemite said:
look at it as the 500 you spent saved your motor from a melt down from being to lean. ya it may not be perfect and im sure cobra is working on it more and more. but if you want the intake and exhaust on there you need to account for the extra air. more air = more fuel = more power.

also take into account that anything "plug and play" isnt going to be as good and "plug and dyno" but if you take into account 500 for Cobra auto tune with maybe a hesitation somewhere or 250 or what ever the PCV is then add 500 to 1000 to have it tuned on a dyno. Ill take the Cobra for its ease of install and fact ya it may not be completely perfect but it will save the motor from a melt down and saved me some money in the long run.
where in the heck are yall getting dynod.....only 250 around here.....gear by gear and each cylinder.
I think I've seen where some people called cobra....some people are having issues with this unit on raiders too. I do know power commander will go above and beyond to help you get the best from their product so give cobra a call....can't hurt.
 

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Discussion Starter · #12 ·
Got with cobra tech support, they said my bike isnt the only one having this problem. From what I understood he said some bike had a different baseline a/f ratio and he would send me another unit with corrections he made. Ill post how it goes.
 

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This my experience with the Cobra trio, I installed the pipes and I could feel a power increase, seat of the pants feeling, but here is what really got me I installed a Powrflo intake and the CVT unit and to tell you the truth from a stop I don't know if it's just me but from the exhaust install to this install I lost some of the " seat of the pants" power feeling, once I'm up to 45, 55 mph yeah I got awesome power but stop and go I don't know since I installed the intake and tuner it feels like I lost some, did this happen to anyone else? or is it just me, I might be going crazy!!
 

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Its not that you lost power... just moved.. by adding the intake you freed up the restriction in the engine which in return moved the power band up. kinda like a drag car has a big tunnel ram = higher rpm torque band... street cars smaller intake = lower rpm torque. its the low end torque you feel in the seat.
 

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Yeah it feels like I lost that low rpm torque, honestly I enjoyed it a lot, is there any way I can get it back without removing some of the mods? I like my new high end power, I just want some of that torque back.
 

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do you have the baffles in the exhaust? if not install them. if there installed. try restricting the intake a bit (sock or something around the air filter)
 

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forget the sock idea... i was being an idiot... thats just going to hurt top end... my bad... to bad we cant adjust timing yet...
 

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No? well I was gonna put a Arlen Ness prefilter on it anyway, just wraps around the filter and helps keep water out and such
 

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good idea with the pre filter. is there room between the baffle and wall of the exhaust. Im thinking you could add some exhaust packing like the stuff fmf using for dirt bikes. that should add some restriction to the exhaust with out hurting overall performance. and in return "tune" the exhaust a bit. since you could add more or take some out.
 
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