HPBCANADA.COM • View topic

I know this is going to be a hot topic this winter as a lot of guys are looking to add to their collection for next year. With any luck there will be more than a few prop boxes heading north of the boarder.
Obviously it's hard to know what is going to work well in 800' without trying it let alone having ACTUAL data to back up that seat of the pants feel. I am sure we have enough knowledge/experience here to help some guys out though.

I for one am curious about Yamaha drags vs cut drag's vs ET's
I have no problems out of the hole with a 14x22 drag but need more steam up top
Will an ET or cut chopper typically yield more MPH then a true YamDrag?

]

great topic !

its going to be tuff to prop my boat... i wont have the revs on the top end to run the small pitch props that your running i think i'll need a big pitch with gobbs of torque to keep up in the 500-800feet range...

Pat what are you revving???

Well 2 years ago at Dunnville I ran a 23 yam copy and I hit the limiter (6700) with my promax at about 500 feet. My speed kept increasing a bit just because of efficiency (the hull started to pop) but I was only doing maybe 73-75mph at the 800 mark. If I propped any bigger I was too slow out of the whole and didn't have enough distance to catch up, it seemed to work best for me.

I mean it was good enough to win Lake racer (except for Lee's "lake racer"

), but 73-75 was only competitive given the boats that were there. There was a panther that was pretty close though :lol:

talonkid wrote:

), but 73-75 was only competitive given the boats that were there. There was a panther that was pretty close though :lol:

no wonder it wont go 100mph....

There was a panther that was pretty close though :lol:

Author:	p man [ October 29th, 2012, 11:02 am ]
Post subject:	Drag Prop Talk
I know this is going to be a hot topic this winter as a lot of guys are looking to add to their collection for next year. With any luck there will be more than a few prop boxes heading north of the boarder. Obviously it's hard to know what is going to work well in 800' without trying it let alone having ACTUAL data to back up that seat of the pants feel. I am sure we have enough knowledge/experience here to help some guys out though. I for one am curious about Yamaha drags vs cut drag's vs ET's I have no problems out of the hole with a 14x22 drag but need more steam up top Will an ET or cut chopper typically yield more MPH then a true YamDrag?

Author:	OneCycle [ October 29th, 2012, 11:22 am ]
Post subject:	Re: Drag Prop Talk
p man wrote: I know this is going to be a hot topic this winter as a lot of guys are looking to add to their collection for next year. With any luck there will be more than a few prop boxes heading north of the boarder. Obviously it's hard to know what is going to work well in 800' without trying it let alone having ACTUAL data to back up that seat of the pants feel. I am sure we have enough knowledge/experience here to help some guys out though. I for one am curious about Yamaha drags vs cut drag's vs ET's I have no problems out of the hole with a 14x22 drag but need more steam up top Will an ET or cut chopper typically yield more MPH then a true YamDrag? great topic ! its going to be tuff to prop my boat... i wont have the revs on the top end to run the small pitch props that your running i think i'll need a big pitch with gobbs of torque to keep up in the 500-800feet range...

Author:	Himagain [ October 29th, 2012, 11:57 am ]
Post subject:	Re: Drag Prop Talk
James What gears are you runnig? I have the same issue with being limited in the RPM. I am running a 24 drag 4 with 1.62 gears and well....It seems to work well I think I could go smaller!

Author:	DoktorC [ October 29th, 2012, 12:50 pm ]
Post subject:	Re: Drag Prop Talk
OneCycle wrote: ] great topic ! its going to be tuff to prop my boat... i wont have the revs on the top end to run the small pitch props that your running i think i'll need a big pitch with gobbs of torque to keep up in the 500-800feet range... You won't be able rev like a 260 (you won't have the power either) but you'll be in line with a Pro Max. Does anyone run a PM? Or better yet....maybe one of the veterans can give us an idea of what they rev at the end of the 800. That would give some of the rookies an idea of where they should be going. Pat what are you revving???

Author:	Jeff Yammer [ October 29th, 2012, 1:11 pm ]
Post subject:	Re: Drag Prop Talk
All depends on the motor .... I'd say a 225PM prop for 7000 rpm. For a relatively stock Yamaha 1st thing I'd do is throw some compression at it for sure. Best bang for the buck as all motors .... compression = tourque !!!! For a Merc Drag you should be able to run a 20" - light 22" 260/280 should be able to run a 22" if no limiter is in the box. Just my thoughts and experience. . but every boat and motor is different. No magic besides some testing. Keep in mind the track at Dunnville was a bit long-ish (+75 or so )

HPBCANADA.COM https://hpbc.ca/

Drag Prop Talk https://hpbc.ca/viewtopic.php?f=51&t=677	Page 1 of 4

Author:	p man [ October 29th, 2012, 2:55 pm ]
Post subject:	Re: Drag Prop Talk
DoktorC wrote: Pat what are you revving??? I'm not totally sure what I was spinning this year. I found my Tach is a bit optimistic and only ran the small props at Dunnville. As best I can tell I was in around the 8800-9000RPM range on the Saturday. As rediculous as it sounds, I'd be interested in trying a 24" wheel to see how it compares. My motor seems to give tons of torque but like I said seems stretched up top. I'm excited to see that Valero setup. I bet you can make that run pretty strong.

Author:	talonkid [ October 29th, 2012, 11:17 pm ]
Post subject:	Re: Drag Prop Talk
Well 2 years ago at Dunnville I ran a 23 yam copy and I hit the limiter (6700) with my promax at about 500 feet. My speed kept increasing a bit just because of efficiency (the hull started to pop) but I was only doing maybe 73-75mph at the 800 mark. If I propped any bigger I was too slow out of the whole and didn't have enough distance to catch up, it seemed to work best for me. I mean it was good enough to win Lake racer (except for Lee's "lake racer" ), but 73-75 was only competitive given the boats that were there. There was a panther that was pretty close though

Author:	OneCycle [ October 29th, 2012, 11:58 pm ]
Post subject:	Re: Drag Prop Talk
talonkid wrote: Well 2 years ago at Dunnville I ran a 23 yam copy and I hit the limiter (6700) with my promax at about 500 feet. My speed kept increasing a bit just because of efficiency (the hull started to pop) but I was only doing maybe 73-75mph at the 800 mark. If I propped any bigger I was too slow out of the whole and didn't have enough distance to catch up, it seemed to work best for me. I mean it was good enough to win Lake racer (except for Lee's "lake racer" ), but 73-75 was only competitive given the boats that were there. There was a panther that was pretty close though no wonder it wont go 100mph....

Author:	talonkid [ October 30th, 2012, 12:05 am ]
Post subject:	Re: Drag Prop Talk
OneCycle wrote: talonkid wrote: Well 2 years ago at Dunnville I ran a 23 yam copy and I hit the limiter (6700) with my promax at about 500 feet. My speed kept increasing a bit just because of efficiency (the hull started to pop) but I was only doing maybe 73-75mph at the 800 mark. If I propped any bigger I was too slow out of the whole and didn't have enough distance to catch up, it seemed to work best for me. I mean it was good enough to win Lake racer (except for Lee's "lake racer" ), but 73-75 was only competitive given the boats that were there. There was a panther that was pretty close though no wonder it wont go 100mph.... ruthless...

Author:	Dougw [ October 30th, 2012, 7:36 am ]
Post subject:	Re: Drag Prop Talk
talonkid wrote: There was a panther that was pretty close though Hmmmm..Maybe the Panther needs a few more hp to wake her up.....like a 300xs with DBR kit.

Page 1 of 4	All times are UTC - 5 hours [ DST ]
© 2000, 2002, 2005, 2007 phpBB Group • http://www.phpbb.com