| Author | Message | ||
     Spike |
I'm looking for some help dialing in our Nallin Racing big-bore blast. Here are Ray Price HD/Buell we installed a complete Nallin Racing 515cc kit on a customer's blast. After 500 miles of break-in we put it on the dyno to see what it would do. Our initial run only found us 32hp. After increasing the rev-limiter to 8k rpm and playing with some jetting changes we've found 37hp at the wheel. I'm sure we can find a little more with time, but I don't know where we're going to find another 13hp to match Nallin's claims. Our current jetting setup is a 160 main jet and a drilled out slow jet (approx. 45). We've got the ignition advance on "8" and a V&H pipe. We're running the stock airbox, but even running without the airbox lid we didn't find any more power. Nallin claims 48-52rwhp from this kit and from what I've read on here he's accurate with these numbers. What are we missing here at Ray Price? I'm not the technician working on the job, but I am the parts guy that recommended this kit so now I'm the one who gets to hear about it when we only get 9hp over stock. Any suggestions? Many, many thanks in advance. Mike L. '99 Cyclone | ||
| Blastin |
I'm not any expert, but a 160 jet is probably your biggest limiting factor at the moment. I have a 170 jet on my Blast and I've only got a White Brothers pipe on it, others run larger jets, and thats without a freeflowing head and the rest of the kit and kabuttle. If my memory serves me right, "The King of the Blastards", Mr. Wilson ran the Blast with and with out the air filter and saw no difference. I'm sure Aaron will step in here shortly and give you some pointers. Jerry | ||
| Spiderman |
ummmm I am not sure on this and I hope Aaron steps in or Mr. Nallin does. But... I knew some one that installed the 1250 kit and got minimal results not close to what was predictied. He had to get a new vlve train and of course cams. NOW before stuff starts flying, this was second hand information, not intended to demean or belittle. Just what I heard from the Dude that put the kit on. (he was a tech too). One thing I know that might add a little kick to the Blaster would be a Accelerator pump. And some cams | ||
| X1glider |
Mike: Go to the Nallin Racing link and click on the dyno room image. There is a graph and list of mods Aaron did to get the HP he found. | ||
| Aaron |
I don't think a BBS dialogue is an effective way to get Mike the results he seeks, there's just too much interaction that needs to happen and information that needs to flow. I've pinged Mike with some phone numbers. | ||
| Spike |
Let me start off by saying that I am _not_ here to say anything negative against Nallin Racing. I'm just looking for some help finding the power this kit is supposed to produce. I'm looking at the dyno chart now. The air/fuel ratio hovers right around 13:1 from 4500rpm up. It dips down to about 12.5:1 at 6k rpm and gradually climbs up to 13.5:1 over 7500 rpm, so I'm not sure there's much more to be had with jetting changes. If anyone knows otherwise please correct me. Aaron's dyno chart on nallinracing.com shows 50rwhp, but it's done with Andrews N9 cams, a Mikuni carb, and a Force pipe. We're currently running the B70 cams that came with the kit, a stock carb with a polished slide, and a V&H pipe. Another difference is that Aaron's blast has stage 2 heads and ours has stage 3 heads. Nallin's site lists the typical result for this kit as 48-52rwhp and 40-45lb/ft of torque with appropriate air cleaner, exhaust, and tuning. We're currently at 37.3hp and 28.9lb/ft of torque with a stock airbox, V&H pipe, and our own experimental tuning. Thanks again, Mike L. '99 Cyclone | ||
| Spiderman |
Might be the V&H pipe i notice alot of power drops with those pipes. Try a Kerker they rock | ||
| Aaron |
Yes, but we have other customers reporting power numbers right around 50hp. That result of mine that's posted was achieved with last year's stuff, the bike is making substantially more right now. We really need to talk. If at all possible, e-mail a dyno sheet to us before you call. Make sure it has torque on it. | ||
| Court |
>>>Any suggestions? Yes. Prepare to be worshiped by the guys in your wrencheteria. Court | ||
| Ezblast |
ohohohohoh - I know that 1 3/4" exhaust header- needed - the Force is there for more hp, I run 180 at sea level and still developed a lean condition which has me doing simular - though I'll go for the Bub(also the only other 1 3/4"  -for torque, the rest is up to the wizards of Nallin - please keep us involved in your findings, inquiring minds need to know! Just Blasting on the Dark side! EZ | ||
| Spike |
Aaron, I got your email, I'll be calling sometime tomorrow. I'll try to get a copy of the dyno chart to you tomorrow morning as well. Thanks again. Mike L. '99 Cyclone | ||
| Rd350 |
Spike, So you need some help with the Blast. First your numbers are correct. I also did the Nallins kit and got the same numbers. Makes you wonder what the bikes really have stock???? Here is what was on the bike. It had 515 big bore, stage three head, huricane piston, modified stock airbox with K & N, Vanes and Hines exhaust, screamin eagle ignition, and stock cams. Here is what might help you get the power you need. First, the stock cams are good for lower RPM power. Remember they are sportster cams. THey are good from 2500 RPM to 5500 RPM. Don't quote me on that. I could never get anyone to tell me the RPM range. They will rev to 7800 RPM but you are losing the power at high RPM. You need bigger cams to get the power. The stock cams are not opening hte values big enough to take advantage of the porting and the bigger valves. Get the Andrews cams. The Andrews I believe start at 2800 RPM and go to 6800 RPm before slowing tappering off. The heads are designed safely to rev to 8000 before float comes into play. The HD race bikes are reving to 8500 RPM but there is not any more power at that RPM range. Just used for over rev.. Second, going with a bigger carb will only give you 1 hp gain. And you will loose the auto choke. Third, you also need to change your exhaust. The Vance and Hines takes away from HP on the top. I would suggest hooker or a drag pipe. And if you still have problems call Brian at Nallins he is very helpful and will go out of his way to help you... |
