How much power can I make from 260 CI

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jet1
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Re: How much power can I make from 260 CI

Post by jet1 » Thu Mar 01, 2018 3:07 pm

Thats good to know. One bonus in my application is that power below 6000 is not required. The engine will live at 6500-7500 pretty much for the whole race.

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CamKing
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Re: How much power can I make from 260 CI

Post by CamKing » Thu Mar 01, 2018 3:30 pm

jet1 wrote:
Thu Mar 01, 2018 11:38 am
Interesting as one of my good friends actually has built a sbf based off a 302 in at 260 ci twin turbo for salt flats racing. He is the current world record holder for his class as of last year. He has suggested to me that I should go with the Ford also. The only reason I have been stuck on the LS is that I am very if the project di not work it is very easy for me to drop in a ct525 or LSX 454 and it will still fall right into a class.
I would go with the LS
3.78" Bore
2.89" Stroke
Mike Jones
Jones Cam Designs
Denver, NC
jonescams@bellsouth.net
http://www.jonescams.com
(704)489-2449

jet1
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Re: How much power can I make from 260 CI

Post by jet1 » Thu Mar 01, 2018 4:36 pm

CamKing wrote:
Thu Mar 01, 2018 3:30 pm
jet1 wrote:
Thu Mar 01, 2018 11:38 am
Interesting as one of my good friends actually has built a sbf based off a 302 in at 260 ci twin turbo for salt flats racing. He is the current world record holder for his class as of last year. He has suggested to me that I should go with the Ford also. The only reason I have been stuck on the LS is that I am very if the project di not work it is very easy for me to drop in a ct525 or LSX 454 and it will still fall right into a class.
I would go with the LS
3.78" Bore
2.89" Stroke
That is pretty much where I am at. Just trying to decide on a rod length 6.125 would prob work but am wondering if going 6.2 or 6.250 would put the pin closer to the c of G of the piston and if it really matters that much.

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CamKing
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Re: How much power can I make from 260 CI

Post by CamKing » Fri Mar 02, 2018 10:44 am

jet1 wrote:
Thu Mar 01, 2018 4:36 pm
CamKing wrote:
Thu Mar 01, 2018 3:30 pm
jet1 wrote:
Thu Mar 01, 2018 11:38 am
Interesting as one of my good friends actually has built a sbf based off a 302 in at 260 ci twin turbo for salt flats racing. He is the current world record holder for his class as of last year. He has suggested to me that I should go with the Ford also. The only reason I have been stuck on the LS is that I am very if the project di not work it is very easy for me to drop in a ct525 or LSX 454 and it will still fall right into a class.
I would go with the LS
3.78" Bore
2.89" Stroke
That is pretty much where I am at. Just trying to decide on a rod length 6.125 would prob work but am wondering if going 6.2 or 6.250 would put the pin closer to the c of G of the piston and if it really matters that much.
It would be nice to have the pin centered, but at the RPM you want to turn, it's not a big deal.
Mike Jones
Jones Cam Designs
Denver, NC
jonescams@bellsouth.net
http://www.jonescams.com
(704)489-2449

jet1
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Re: How much power can I make from 260 CI

Post by jet1 » Fri Mar 02, 2018 3:49 pm

CamKing wrote:
Fri Mar 02, 2018 10:44 am
jet1 wrote:
Thu Mar 01, 2018 4:36 pm
CamKing wrote:
Thu Mar 01, 2018 3:30 pm

I would go with the LS
3.78" Bore
2.89" Stroke
That is pretty much where I am at. Just trying to decide on a rod length 6.125 would prob work but am wondering if going 6.2 or 6.250 would put the pin closer to the c of G of the piston and if it really matters that much.
It would be nice to have the pin centered, but at the RPM you want to turn, it's not a big deal.
Any thoughts on a cam for this unit? I have been around the 255/275 .670/ .695 ish 114 lc. By the way very happy with the cam you got me for my LSX454. It has won to Canadian titles and a world title in my class.

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Re: How much power can I make from 260 CI

Post by englertracing » Fri Mar 02, 2018 4:53 pm

https://youtu.be/DnCsQPpY6xA
Stock 5.4 block and heads.........
Apparently it is making 2500hp.......
Scaling down to your 4.26 liter or 260" would be 1972hp.....
That sounds nice...
:D

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Re: How much power can I make from 260 CI

Post by CamKing » Sat Mar 03, 2018 11:07 am

jet1 wrote:
Fri Mar 02, 2018 3:49 pm
CamKing wrote:
Fri Mar 02, 2018 10:44 am
jet1 wrote:
Thu Mar 01, 2018 4:36 pm

That is pretty much where I am at. Just trying to decide on a rod length 6.125 would prob work but am wondering if going 6.2 or 6.250 would put the pin closer to the c of G of the piston and if it really matters that much.
It would be nice to have the pin centered, but at the RPM you want to turn, it's not a big deal.
Any thoughts on a cam for this unit? I have been around the 255/275 .670/ .695 ish 114 lc. By the way very happy with the cam you got me for my LSX454. It has won to Canadian titles and a world title in my class.
It wouldn't need anywhere near that much duration. Depending on if you go hydr or mechanical roller, you should be in the high 230's to low 240's @.050"
Mike Jones
Jones Cam Designs
Denver, NC
jonescams@bellsouth.net
http://www.jonescams.com
(704)489-2449

jet1
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Re: How much power can I make from 260 CI

Post by jet1 » Mon Mar 05, 2018 11:02 am

CamKing wrote:
Sat Mar 03, 2018 11:07 am
jet1 wrote:
Fri Mar 02, 2018 3:49 pm
CamKing wrote:
Fri Mar 02, 2018 10:44 am


It would be nice to have the pin centered, but at the RPM you want to turn, it's not a big deal.
Any thoughts on a cam for this unit? I have been around the 255/275 .670/ .695 ish 114 lc. By the way very happy with the cam you got me for my LSX454. It has won to Canadian titles and a world title in my class.
It wouldn't need anywhere near that much duration. Depending on if you go hydr or mechanical roller, you should be in the high 230's to low 240's @.050"
I would like to stay with hydraulic roller if I could but it's not a deal breaker. Not sure what I was thinking with that much duration but when I say 7500 usually I am looking for a tq peak close to that.

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