dreaux

iTrader: (5)

The specs on the answer rc site says 48,000 rpm and 2.9 at 36,000?

is this correct? That would make it the most powerfull .21 i have ever seen or heard of if true.

http://answer-rcusa.com/zencart/inde...hjop3d5eke7a65

J.Whiting

iTrader: (63)

looks to be a tade high... all dyno's are different.. might be turned up to fudge the #'s... i have used the p/r/s form the arrow engine in several v-spec's now... run great with no issues.. this motor is basically the old v-spec.... jeremy

CKmaxx

iTrader: (1)

It's called "marketing" so all the noobs will buy it. It might as well have 5hp @ 60,000 rpm. I don't think the importers care about what is true or not. Looks like a good ol' v-spec to me....

Colt4g63

iTrader: (8)

It is very similar to the old Vspec in design. But the port timing is definitely not the same. The Arrow has more aggressive port timing profiles.

rider313

iTrader: (94)

Like stated dyno results very. Let's say Neil has a mill and sends it to A&B mods and he dyno's it and the numbers might/will very. The only way to compare engines via dyno numbers is if they are done by the same guy on the same dyno. That way there is a constinant with minimal veribales.

Ps I have nothing against Neil and Clockworks or A&B mods. They are just the two companies I know with dyno's, and I would trust any numbers they put out compared to what the manufacture say.

dreaux

iTrader: (5)

I agree, but claiming 48k and 38k at 2.9 hp is a little over the top and just plain absurd. No way that is possible, even with higher port timing. Even if the crank/piston/rod is lightned and ceramic bearings are used with a higher compression ratio, you might get 45k. I just think false advertising and misinformation is bad and ther is no place for it.

Jaz240

iTrader: (52)

all the companies do it Marcus. Where they get these inflated numbers from is anyone's guess. I spoke to Neal about this awhile ago and he basically said its nothing more than a marketing ploy and those numbers are basically useless. I will say this though, after selling a bunch of these new Arrow engines everyone is loving them so far. They are basically an original V spec with a lower price tag and from customer feedback they keep pinch and compression much longer. Break in is more of a PITA than the original V spec but no one is complaining that compression is gone after 3-4 gallons. The engine is very smooth, gets great fuel mileage and is about $20 less than the B5 and $50 less than the new Blue head OS. There is a thread here dedicated to this engine and no-one has had any bad things to say so far.

jpalessi

iTrader: (55)

not true. Its called spend the little money and time and calibrate your dyno so it gives real readings. dynos that aren't calibrated are only good for in-house comparisons. which if your dyno isn't calibrated, posting results to promote sales is just cheesy. its like looking at a buger king menu, the food never looks like that.

dreaux

iTrader: (5)

I understand you James, I guess I was just taken aback by those claims. I have never seen those kind of numbers even on modded on road engines. Thanks for the headz up, I will have to go check that thread out!

Jaz240

iTrader: (52)

go look at the claims on some of the Axial engines