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  Topic Review (Newest First)
06-12-2013 11:11 PM
hardrock i was wrong i didnt mean afr ratio, it was fuel mixture was at 13.9 to 14
06-11-2013 08:38 AM
mocotom
Quote:
Originally Posted by hardrock View Post
i will call andrew tomar, if i get a self tunner were do i want the afr to be were that i can get the most power out of it , everybody tells me that was the reason my bike was not putting out big #s because of the revf. perf. tuner was cutting my power. the ratio was 13.9 the last time we dynoed i think ,so how can a tuner make any more power , ithought if fuel is right its right, im dummer than a rock on these efi systems.i have had carb bikes for the last 32 yrs, i guess i will learn if i dont go broke.
Best power at wide open throttle is normally 12.6 to 13.1 a/f. The 13.9 you refer to is a/f ratio normally at 60 to 70 KPa (where the motor begins to transition to power from cruise). If your a/f ratio is actually 13.9 at WOT it would seriously limit power output and cause severe detonation, which requires timing reduction and further power loss.
06-10-2013 11:10 PM
hardrock i will call andrew tomar, if i get a self tunner were do i want the afr to be were that i can get the most power out of it , everybody tells me that was the reason my bike was not putting out big #s because of the revf. perf. tuner was cutting my power. the ratio was 13.9 the last time we dynoed i think ,so how can a tuner make any more power , ithought if fuel is right its right, im dummer than a rock on these efi systems.i have had carb bikes for the last 32 yrs, i guess i will learn if i dont go broke.
06-10-2013 08:22 PM
mocotom
Quote:
Originally Posted by hardrock View Post
yea will be to costly i guess, i can work on a carb on the side of road an rejet, cant do nothing with efi. i got revf. perf. fuel system an cant get it set because they say thier system is dn and its been dn all yr.bike not putting out right #s an if i had a carb. i could tune it my self . but thats life money money money !!!
Hardrock
Two of the bikes that I had installed these systems on had cam swaps over the winter. When Rev perf. could not reprogram them, they agreed to refund the purchase price with proof of purchase receipt. If you have your receipt, call and speak to Andrew.
06-10-2013 06:16 PM
ironmark With the auto tuner technology available today changing or adding on engine mods are becoming a none issue. But for those that don't use a auto tuner it is more difficult and expensive getting the tune right.
06-10-2013 04:24 PM
rageglide
Quote:
Originally Posted by ironmark View Post
Get rid of the rev performance fuel system. The EFI has to many advantages over the carburetors too swap it out. Your EFI is controlled through the ECM so there is no need to re-jet. Once the correct map is in the ECM the ECM will make all the adjustments to the EFI that are necessary for the bike to run right, this is important when it come to elevation changes when riding. If the carbs were still a good option for these bikes I would think HD would still give the customer the option of what they preferred. Why don't you look into a good auto tuner like a Thundermax or Power Vision.
I am fairly certain carbs are gone because Harley has to comply with EPA. Too easy to modify, too difficult to get them to run decently when jetted as lean as EPA mandates now. EFI is about emissions, auto's shifted to EFI long before because of the sheer numbers and tighter emissions requirements. Let's also not forget Harleys implementation of torque management to reduce flywheel and drivetrain shock (and saving them warranty work).

Carbs may well be considered dinosaur tech, but they are very very capable devices. A properly jetted CV carb handles most elevation changes extremely well. Sure the newer EFI is damned good at elevation changes, but you, Mark, know full well how fuked it can be dialing in a tune when you make changes, which most Harley guys do... That's why I will always carry a torch for a carb. In several hundred thousand miles I have never been stranded by a carb, and any issue I've encountered was easily remedied. Of course I've never been stranded with EFI either, but then again I don't have that many miles on HD EFI...oops, I just remembered I have been stranded by EFI on my bmw because a fuel pump crapped out...
06-10-2013 11:57 AM
ironmark
Quote:
Originally Posted by hardrock View Post
yea will be to costly i guess, i can work on a carb on the side of road an rejet, cant do nothing with efi. i got revf. perf. fuel system an cant get it set because they say thier system is dn and its been dn all yr.bike not putting out right #s an if i had a carb. i could tune it my self . but thats life money money money !!!
Get rid of the rev performance fuel system. The EFI has to many advantages over the carburetors too swap it out. Your EFI is controlled through the ECM so there is no need to re-jet. Once the correct map is in the ECM the ECM will make all the adjustments to the EFI that are necessary for the bike to run right, this is important when it come to elevation changes when riding. If the carbs were still a good option for these bikes I would think HD would still give the customer the option of what they preferred. Why don't you look into a good auto tuner like a Thundermax or Power Vision.
06-09-2013 09:46 PM
hardrock yea will be to costly i guess, i can work on a carb on the side of road an rejet, cant do nothing with efi. i got revf. perf. fuel system an cant get it set because they say thier system is dn and its been dn all yr.bike not putting out right #s an if i had a carb. i could tune it my self . but thats life money money money !!!
06-09-2013 09:28 PM
rageglide ...Also, I am VERY interested in solutions to this request.

There 4 posts in a row.. lol get me a drink dammit.
06-09-2013 06:23 PM
rageglide Just a quick apology in advance cuz I'm fairly certain I may have come across like a complete a-hole... It was a knee jerk reaction based on every other thread started on this subject.
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