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8000 rpm??
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8000 rpm??
I watched a youtube video of "pyro"'s (on s n f) 'stream with a 2.4 running 8000 rpm. just wondering, since it's winter and i need a project anyways, what would it take for my 2.4 xri efi to run like that? is it even possible, or is his motor a completely different animal? love those revs.....
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1988 Canadian Edition Vision Sold
1990 Hydrostream Virage Stage 3 Turbo
1990 Hydrostream Virage Stage 3 Turbo
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Re: 8000 rpm??
If yours is a EFI there will be a rev limiter in the ecu, I don't know what it's set at but close to 6500. Even with the nitrous and a 26 pitch prop I can only get about 7700 rpm out of my 2.4, and that's with a light viper. The 2.4 doesn't breath as well as a 2.5 so it's limited on rpm before they run out of steam.
I see it's a bridgeport, that is a whole different animal than a fishing motor. To make a regular motor spin up a little better search for cherry 2.4 by T-rex.
I see it's a bridgeport, that is a whole different animal than a fishing motor. To make a regular motor spin up a little better search for cherry 2.4 by T-rex.
Last edited by 77viper on Nov 03, 2011 10:37 pm, edited 1 time in total.
Samari on s&f
Chet Olson
75 viper 2.4 200, 130 shot of NOS
91 vegas loaned out
79 vking project 2.5 280
Chet Olson
75 viper 2.4 200, 130 shot of NOS
91 vegas loaned out
79 vking project 2.5 280
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- Hydrostream know it all
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Re: 8000 rpm??
I build car motors all the time, so I know what it takes to get them to rev. But 2 stroke modifying is new to me.... Can I just get a reprogrammed ecu and spin the wee out of it? Or is there airflow/ignition/injector upgrades or modifications that will be advantageous?
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1988 Canadian Edition Vision Sold
1990 Hydrostream Virage Stage 3 Turbo
1990 Hydrostream Virage Stage 3 Turbo
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- HSF Supporting Vendor
- Posts: 1989
- Joined: Mar 29, 2009 11:38 pm
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Re: 8000 rpm??
Found it http://www.byuboyz.com/trex/Cherry2.4.htm
If your motor is stock first thing that needs to go is oil injection, next is reeds.
If your motor is stock first thing that needs to go is oil injection, next is reeds.
Samari on s&f
Chet Olson
75 viper 2.4 200, 130 shot of NOS
91 vegas loaned out
79 vking project 2.5 280
Chet Olson
75 viper 2.4 200, 130 shot of NOS
91 vegas loaned out
79 vking project 2.5 280
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- Hydrostream know it all
- Posts: 527
- Joined: Aug 08, 2011 10:22 pm
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Re: 8000 rpm??
Wow, most of those are simple mods just to improve airflow. Besides cutting the heads, really, there's nothing I can't do out in my shed lol... Looks like I might have to bust open my "parts" powerhead and introduce it to my die grinder . Still limited by my ecu though, is there a factory one I should look for? Or a specific aftermarket one? Thanks for the link btw, I'll put it to good use I'm sure
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1988 Canadian Edition Vision Sold
1990 Hydrostream Virage Stage 3 Turbo
1990 Hydrostream Virage Stage 3 Turbo
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- Hydrostream know it all
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Re: 8000 rpm??
What's the difference between a bridgeport and my motor?
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1988 Canadian Edition Vision Sold
1990 Hydrostream Virage Stage 3 Turbo
1990 Hydrostream Virage Stage 3 Turbo
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- HSF Supporting Vendor
- Posts: 1989
- Joined: Mar 29, 2009 11:38 pm
- Location: montgomery MN
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Re: 8000 rpm??
The big difference is the exhaust port. The BP has a large port requiring a bridge in the middle hence the name bridge port. It was mercury's racing engine before the 260. If you can find a ecu from one it would be a step in the right direction, otherwise check with Brucato http://www.brucatosvs.com/acu.html
http://i93.photobucket.com/albums/l50/kartracer_01/img1251855750176.jpg
http://i93.photobucket.com/albums/l50/kartracer_01/img1251855750176.jpg
Samari on s&f
Chet Olson
75 viper 2.4 200, 130 shot of NOS
91 vegas loaned out
79 vking project 2.5 280
Chet Olson
75 viper 2.4 200, 130 shot of NOS
91 vegas loaned out
79 vking project 2.5 280
-
- Hydrostream know it all
- Posts: 527
- Joined: Aug 08, 2011 10:22 pm
- Location: Peterborough Ontario
- Has thanked: 11 times
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Re: 8000 rpm??
Cool stuff, thanks for the help. I'll be keeping my eyes open over the winter months for a few things now.... Jack plate, props, ecu, lol.... Can't wait to get it wet again!
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1988 Canadian Edition Vision Sold
1990 Hydrostream Virage Stage 3 Turbo
1990 Hydrostream Virage Stage 3 Turbo
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Re: 8000 rpm??
The cast pistons can be a problem, 8000 is borderline for em.
transomstand
Original owner 1975 Ventura II SE
Original owner 1975 Ventura II SE
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- Hydrostream know it all
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Re: 8000 rpm??
That's fine with me, I'm just looking for more than what I have. Good to know there is a limiting factor though!
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1988 Canadian Edition Vision Sold
1990 Hydrostream Virage Stage 3 Turbo
1990 Hydrostream Virage Stage 3 Turbo
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