my 98 std vs a 2014 valk

[quirkyguy001]

The other day I was fueling my 98 and a new 2014 pulled up next to me. It was his first nonharley and really loved it. We started talking and he was curious about which bike had better performance. So we went out onto the street and first ran some lights together. I blew him away. Then we went out on the turnpike where the speed limit is 75 and did some roll offs from 50 to 100 mph. No contest there either. We stopped at the rest area and he was really pissed. Then I told him the two bros carbon fiber pipes added 12hp according to a before and after dyno, but the fun part was when I pointed out the decal I had on my pipe the said "performance work by the Attic Rat". I figure the bike has between 125 and 130 hp now. Not going to waste $ on a dyno test. So we had a good laugh. He still has a HD killer, just can't dust an old Valk.

[The emperor has no clothes]

125 hp sounds pretty good . How is your mileage affected?

[jimmytee]

The other day I was fueling my 98 and a new 2014 pulled up next to me. It was his first nonharley and really loved it. We started talking and he was curious about which bike had better performance. So we went out onto the street and first ran some lights together. I blew him away. Then we went out on the turnpike where the speed limit is 75 and did some roll offs from 50 to 100 mph. No contest there either. We stopped at the rest area and he was really pissed. Then I told him the two bros carbon fiber pipes added 12hp according to a before and after dyno, but the fun part was when I pointed out the decal I had on my pipe the said "performance work by the Attic Rat". I figure the bike has between 125 and 130 hp now. Not going to waste $ on a dyno test. So we had a good laugh. He still has a HD killer, just can't dust an old Valk.

"Just can't dust an old Valk" is a bit misleading in your case isn't it? I'm guessing that most Valks, regardless of vintage, wouldn't be able to dust your Valk. But a stock ols school Valk against his 2014 will ,make him a happier camper.

[MarkT]

Haven't seen 125-130 dynos except with blower or nitrous.  Ya might have 110 - even that would be great with just tuning.

[jimmytee]

Haven't seen 125-130 dynos except with blower or nitrous.  Ya might have 110 - even that would be great with just tuning.

That's kinda what I was thinking, but I certainly don't know everything and I've heard of Attic Rat's work. I'd like him to tune mine like that.

[quirkyguy001]

Don't think 18hp from everything Attic Rat does is hard to believe. Have to used premium since the compression is now 12-1 and if I respect the throttle I can get 145-150 before hitting reserve. Bob does a lot more than tuning. Takes and a week and 2k to get it there. If you are ever in Tulsa and see  a blue and crème valk with a dragon on the fender we  give it a  try. I didn't expect many people to accept my numbers, but I don't see why it is so hard do the math. I watched him remove all the air restrictions and totally rebuild the carbs .The other rider got a good laugh at being sandbagged.

[98valk]

some #s

for reference increasing the compression ratio to 12:1 is providing part of the HP and MPG increase.
A chart I have shows ~ 2.8% increase in power going from 10:1 (9.8:1 oem) to 12:1 ratio.  MPG will increase ~ 5.6%

avg 95 hp + 2.8% = 97.66 hp
avg 35 mpg + 5.6% = 36.96 mpg of course now premium is needed which increases cost over the mpg gain.
 the chart is for a street v-8 with a short cam duration.
the cam will affect these numbers, a cam with more duration and these HP and MPG #s will be even higher.
chart source "performance with economy" by david vizard

Head port work can easily add 10-15 HP. so with a good exhaust and carb tunning, 110-115+ HP should be in the range of ARs complete package.

just to add, my '98 dyno'd 100 HP after modding the exhaust with glass packs and airbox mods and re-jetting. ambient was 72F. at Inzane II at 95F the bike dyno'd 98 HP and A/F was slightly rich at WOT. Didn't dyno before mods, so stock probably about 92 HP.
now have vikings, re-modified air box and jetting. need to get to dyno, but definitely runs much stronger than before.

[Russell Rice]

I have the dyno sheet  to prove the hp I got by attic rats work. I was one of the first bikes to get his work ( I use to be one that did the work with him) and he has done more improvements since then. My bike dynode at 108 hp. With the improvements he has made I am almost sure there is a gain in hp. I know there is a lot of nay sayers on the board but that is ok. Bob's work speaks for itself. Attic Rat does not bolt on after market wiz bangs or add magical whats a ma jiggers to improve performance. He does REAL performance work on the Valkyries and is top notch at what he does. If you want to know what he does to the bike just message him, he will be more than happy to talk to you. He does not "tune" your bike to get the hp.I will try to add my dyno to this post. I don't think it will prove anything because you will hear that not all dynos are the same, along with about a 100 other reasons that my dyno sheet don't mean nothing. Just my 2 cents.

[Russell Rice]

I also had the glass pack mod on the bike when the dyno was ran

[MarkT]

Like I said - 110 is a good guess with tuning.  Top quality tuning such as we have heard about Attic Rat.  I concur on the head work - I did that to a 327 Chevy and it really powered up - ported & polished, with oversize valves - it was like bolting on a blower.  Felt like it to me, anyway - BIG kick in power.

[98valk]

I also had the glass pack mod on the bike when the I ran the dyno

nice #s
your A/F is all over the place. clean that up and u should be in the 110-115 HP range plus better HP under the curve.

[sandy]

The bottom line of the OP is, if the Valk was bone stock, the new Valk would have left you in the weeds.

[quirkyguy001]

I give up. So you say my dyno that showed 112hp with the 2 bros means that everything attic rat added nothing to my bike. Guess I want my money back, NOT. I figured I would get some screwy replies, but I had know idea. You folks have a nice life. I did get the contact of attic rat and guess that's all I need. Toodles. This is way to negative for me

[98valk]

I give up. So you say my dyno that showed 112hp with the 2 bros means that everything attic rat added nothing to my bike. Guess I want my money back, NOT. I figured I would get some screwy replies, but I had know idea. You folks have a nice life. I did get the contact of attic rat and guess that's all I need. Toodles. This is way to negative for me

nobody is saying ARs mods don't make power, we all know that they do.
every magazine test showed all valkyries in the 92-96 HP range some listed calif-spec bikes at 90 HP excluding the pilot production model '97 that dyno'd 101 HP.
two brothers listed 12-15 HP increase if I remember correctly. So the numbers I provided are in the realistic ball park.
remember it is very easy for a dyno operator of the most common dynos to increase the numbers to make the customer happy. there are many tricks to boost the #s.
so basically your bike stock was not making 100 HP, more like 92 HP (some mags posted '98s only making 90 HP) plus the 12 for the new exhaust so about 104 HP + 2.8% compression increase = ~ 106 HP plus 10-15 head work 120 HP.
like I posted 110-115+ if everything is perfect. I was in the ball park.

[Icelander]

I honestly didn't see much in the way of negative posts here. Just a good discussion of the performance tweaks. At most, I'd say the only negative is that you claimed 120hp and a couple of other people said 110-115 might be more realistic.

I'm certainly not going to quibble over 5hp. Especially considering my other vehicle is a '85 Pontiac Fiero 4-cylinder and it got *new* a whopping 98hp and it's still a blast to drive at over 200K miles on the clock. I enjoy spanking the other bikes and cars with my stock 90hp Valk and it's 1600 pounds lighter than my Fiero.

Please don't leave because of this. This has got to be one of the most civilized boards I've read in years.

Kendall

[MarkT]

I give up. So you say my dyno that showed 112hp with the 2 bros means that everything attic rat added nothing to my bike. Guess I want my money back, NOT. I figured I would get some screwy replies, but I had know idea. You folks have a nice life. I did get the contact of attic rat and guess that's all I need. Toodles. This is way to negative for me

Wow.  Pretty touchy dude.  You're talking to gearheads who really know this bike, most with experience of 15 years or more - mine is 17 years - making a claim of power w/o dyno support that we all know is not normal or even possible w/o a blower or nitrous and/or other major engine mods you have not done.  Tuning with bolt-ons alone, even from attic rat, will not get you even close to 125-130hp. WHAT "dyno that showed 112hp"? First mention of it here in your hot post. Got the printout?  Doubt it. I don't see any neg posts here other than yours.  

YOU "have a nice life". Somehow I think we might survive.   See if you can find another forum supporting the Valkyrie who will agree with your unsupported wild claims - then trust their advise is valid.  NOT.

[Fastera]

Glad to hear that an ole Valk smoked a new Valk.  Had an opportunity to run an modded HD yesterday on my stock Valk and absolutely smoked him.  [img][IMG]