How much power can I make from 260 CI
Moderator: Team
How much power can I make from 260 CI
I am thinking about a class that I have raced in the past but it is limited to 260 CI when using forced induction. I would have a host of options regarding different engines but cost and complexity comes into it. To be competitive I am looking at around 1000 hp at around 7500 rpm and would like to be able to run AV for fuel. So far the options I have thought about are going to the Toyota 2jz, 4 rotor Rotary, or destroke a GM ls 4.8 l. Any of these seem possible?
-
- Guru
- Posts: 2858
- Joined: Thu Jan 06, 2011 8:57 am
- Location:
Re: How much power can I make from 260 CI
Yes its possible. Smokey Yunick made 1000 horsepower from a 209 inch Chevy V8 for Indy in about 1970.
-
- Guru
- Posts: 1575
- Joined: Mon Apr 04, 2011 8:54 pm
- Location: central Florida
Re: How much power can I make from 260 CI
Ahhhh Mr. black and gold was way ahead of his time wasn't he. God rest his soul.
-
- Member
- Posts: 184
- Joined: Mon Feb 09, 2015 6:40 pm
- Location:
Re: How much power can I make from 260 CI
All of those will do it with work. I'd lean towards the 4.8 - the most displacement you have the least hard you have to work everything, and more headbolts are always good. 2JZ is going to be more stressed but should still do it. 4-rotors are not production in anything ever - you're looking at around 20k by the time you have the longblock done, who knows what equivalency factor whatever racing org is giving, and tuning tends to be something a lot of people shy away from.
Re: How much power can I make from 260 CI
https://youtu.be/QH4yh4TsP2w Here is a blown 260 cid on the dyno.
-
- HotPass
- Posts: 3462
- Joined: Sat Feb 23, 2013 5:42 pm
- Location:
Re: How much power can I make from 260 CI
They're making 300bhp in road race trim from turbo-charged 636cc I4s. This shouldn't be a problem.
-Bob
Re: How much power can I make from 260 CI
Take the four rotor engine off your list... granted it is peanuts to make 700+hp before turbos, but you're also looking at about $50k just for the block.jet1 wrote: ↑Wed Nov 01, 2017 12:49 pm I am thinking about a class that I have raced in the past but it is limited to 260 CI when using forced induction. I would have a host of options regarding different engines but cost and complexity comes into it. To be competitive I am looking at around 1000 hp at around 7500 rpm and would like to be able to run AV for fuel. So far the options I have thought about are going to the Toyota 2jz, 4 rotor Rotary, or destroke a GM ls 4.8 l. Any of these seem possible?
Re: How much power can I make from 260 CI
How much can it weight and how large can the package be?
If you can destroke the 4.6L 4-valve DOHC modular Ford V8 from 90mm stroke and 281 CID to 80mm stroke and slightly under 260 CID, it's easy to get a low compression, hugely well flowing heads, and a lot of aftermarket parts. Then bolt two twin-scroll turbos to it and it's going to make a lot of power.
If you can destroke the 4.6L 4-valve DOHC modular Ford V8 from 90mm stroke and 281 CID to 80mm stroke and slightly under 260 CID, it's easy to get a low compression, hugely well flowing heads, and a lot of aftermarket parts. Then bolt two twin-scroll turbos to it and it's going to make a lot of power.
Paradigms often shift without the clutch -- https://www.youtube.com/watch?v=cxn-LxwsrnU
https://www.instagram.com/ptuomov/
Put Search Keywords Here
https://www.instagram.com/ptuomov/
Put Search Keywords Here
-
- Guru
- Posts: 4161
- Joined: Sun Jan 29, 2006 9:46 pm
- Location: Lund in Sweden
- Contact:
-
- Member
- Posts: 182
- Joined: Tue Jun 07, 2011 2:53 am
- Location:
Re: How much power can I make from 260 CI
Come on guys, cost dominates the question from the OP.
There are countless paths to make a modest 1000 hp from 260 cid. How much money is he prepared to spend on that quest?
There are countless paths to make a modest 1000 hp from 260 cid. How much money is he prepared to spend on that quest?
-
- Guru
- Posts: 3661
- Joined: Tue Aug 19, 2008 7:20 am
- Location: South Australia
Re: How much power can I make from 260 CI
I would destroke the LS 4.8. Hands down. Put twins on it. Been done before, or atleast a 4.8 have been way more than 1.000 hp.
Re: How much power can I make from 260 CI
The bigger you go, the less boost you need so the less octane you need.
1000 HP from 2 litres has been done but 1000HP from 4 litres is half the stresses.
More cylinders is better.
1000 HP from 2 litres has been done but 1000HP from 4 litres is half the stresses.
More cylinders is better.
-
- HotPass
- Posts: 3462
- Joined: Sat Feb 23, 2013 5:42 pm
- Location:
Re: How much power can I make from 260 CI
At that rpm peak, you’ll want 4 valves. If you’re not limited by rules, you’ll want 4 valves per cylinder. Makes for a much wider power band.
-Bob