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post #1 of 20 (permalink) Old 09-03-2010, 08:02 AM Thread Starter
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are fundy's hp numbers for real

I've been shopping standard bore kits (please no debate on 840 vs standard bore). Fundy is claiming 90 and 100 up std bore kits. Has anyone put these numbers to the test on a dyno ? Also if ur running one of these kits, what do you think?

Salt Lake City, UT

09 Teryx FI Sport
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post #2 of 20 (permalink) Old 09-03-2010, 09:00 AM
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Fundy uses crank #s. Most others use wheel dynos, which are always less.
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post #3 of 20 (permalink) Old 09-03-2010, 11:23 AM Thread Starter
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Fundy uses crank #s. Most others use wheel dynos, which are always less.
Oh yeah I figured that for sure. So I guess crank hp is a WAG? To my knowledge nobody has a crankshaft dyno for a V-Twin. I'm guessing you can minus 20-30 at the wheels. But even 60rwhp seems high to me for a standard bore. Maybe not, but that's why I ask

Salt Lake City, UT

09 Teryx FI Sport
Rear cage Extension with top and seat
Muzzy duals
Dalton Clutch
MSD
HIDs


2010 Dodge 2500 Cummins
08 Weekend Warroir 3200FS
08 KFX 450R (mild mods)
06 Ltr-450 (heavy mods)
99 Yamaha Badger 80
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post #4 of 20 (permalink) Old 09-03-2010, 11:31 AM
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Originally Posted by DamnBigPapa View Post
Oh yeah I figured that for sure. So I guess crank hp is a WAG? To my knowledge nobody has a crankshaft dyno for a V-Twin. I'm guessing you can minus 20-30 at the wheels. But even 60rwhp seems high to me for a standard bore. Maybe not, but that's why I ask
No not really there are alot of standard bore kits showing around 60 hp, I have seen some with head work and bigger tbs get high 60s.

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post #5 of 20 (permalink) Old 09-03-2010, 12:01 PM
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60 HP sounds about right for a std bore. I forget the exact number we pulled on the dyno with my car but it was in that area. FST std bore, Dasa pipes, MSD.

A crank dyno will give you a more accurate number to compare but only if comparing to another motor run on a crank dyno. The clutching in these cars affects the chassis dyno numbers big time.
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post #6 of 20 (permalink) Old 09-03-2010, 12:09 PM
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60 HP sounds about right for a std bore. I forget the exact number we pulled on the dyno with my car but it was in that area. FST std bore, Dasa pipes, MSD.

A crank dyno will give you a more accurate number to compare but only if comparing to another motor run on a crank dyno. The clutching in these cars affects the chassis dyno numbers big time.
Chad with the engine kits are you seeing what Steve sees on the bored tbs, I think he said on the 840 6-7 hp and standard 4-5 hp. I was just thinking that with the bigger intake valves and polished ports should even boost those numbers more, you think?

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post #7 of 20 (permalink) Old 09-03-2010, 02:49 PM
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Sounds right to me too. A propperly set up ( clutching , timing and jetting ) FST 840 will be at 70 to 75 RWHP. From what I have seen the standard bores run about 10 RWHP less than the 840 with a whole lot less torque. Not starting a debate because you will love the standard bore ! Just saying the #'s sound about right.

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post #8 of 20 (permalink) Old 09-03-2010, 06:25 PM Thread Starter
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Originally Posted by KYWILDCATS74 View Post
Sounds right to me too. A propperly set up ( clutching , timing and jetting ) FST 840 will be at 70 to 75 RWHP. From what I have seen the standard bores run about 10 RWHP less than the 840 with a whole lot less torque. Not starting a debate because you will love the standard bore ! Just saying the #'s sound about right.
For me right now it's about cost. I'm a student of "there's no replacement for displacement". But I need to get this motor fixed on a budget and a BBK is twice the price. Hell if cost wasn't an option it would get a Turbo. I'm married so cost is always a factor

Salt Lake City, UT

09 Teryx FI Sport
Rear cage Extension with top and seat
Muzzy duals
Dalton Clutch
MSD
HIDs


2010 Dodge 2500 Cummins
08 Weekend Warroir 3200FS
08 KFX 450R (mild mods)
06 Ltr-450 (heavy mods)
99 Yamaha Badger 80
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post #9 of 20 (permalink) Old 09-03-2010, 06:36 PM
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I have the Fst 840. The price is too close not to do the 840. You've gone this far...stand up in the end and you'll be satisfied with the results!

08 Teryx 840 stage III, dalton, dynatek, 48" bed delete", pds k2 cage, fusion head unit, alpine amp, fosgate 8" marine, kicker 10" sub.
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post #10 of 20 (permalink) Old 09-03-2010, 06:53 PM
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Quote:
Originally Posted by bigdaddy View Post
Chad with the engine kits are you seeing what Steve sees on the bored tbs, I think he said on the 840 6-7 hp and standard 4-5 hp. I was just thinking that with the bigger intake valves and polished ports should even boost those numbers more, you think?
I am not sure the exact numbers but there was a good increase with the bored throttle bodies even on a totaly stock car we were seeing a few extra HP. You should see an increase in HP with bigger valves, porting and polishing also.

I am very happy with my FST STD bore kit. It runs great. Correct clutching really makes a big difference. If your on a budget there is nothing wrong with the STD bore kit for a little more power but if you are looking for something to keep you planted in your seat you should definately look for an 840 kit or larger.

I have no problems running neck to neck with 840's in open desert, they do start to pull over a good distance. But I have no chance if there is an incline or sand involved, the extra torque of the 840 makes a huge difference.
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