Lr 2.0

[camfast]

Im throwing the idea of building a long rod 2.0 for my next buildup. Any pros or cons of going this route? Anyone here running one?

 

[Boostinsideways]

It would simple give you a better rod ratio. The only benefit would be to rev higher, you would need a very built head to take advantage of it, and a very very good trans. Miss a shift @ 9500 rpm, or get a boost spike, that would loads of fun.

If you want to rev the piss out of it, you would probably be better of going with a 2.4 block and destroking it to a 2.2L. You would have a better rod ration than a 2.4 or 2.3 and more displacement than a 2.0.

 

[camfast]

It would simple give you a better rod ratio. The only benefit would be to rev higher, you would need a very built head to take advantage of it, and a very very good trans. Miss a shift @ 9500 rpm, or get a boost spike, that would loads of fun.

If you want to rev the piss out of it, you would probably be better of going with a 2.4 block and destroking it to a 2.2L. You would have a better rod ration than a 2.4 or 2.3 and more displacement than a 2.0.

I have a built auto so hopefully it should take the revs. As far as valvetrain i have the ST springs and retainers along with hks 272 cams. Not too sure about going with a 2.4 block, i think i want to stick with the trusty old 2.0

Im also wondering if the long rod 2.0 would spool up a bigger turbo faster or make more torque in the midrange rpm?

 

[Boostinsideways]

As far as I can tell you based off my experience no. All you would gain is a better rod ratio which would allow you to rev higher. Plenty of people have used 2.4 blocks, and even more have built 2.3 strokers. Those your best bets to decrease spool time and increase torque.

 

[ed1380]

The 4g64 is a 4g63 bored out .060 with a 6mm taller cylinder.

 

[Boostinsideways]

Yeah but it doesn't have oil squirters, which should be no problem if your using forged pistons.

 

[ed1380]

Forgot that one but some shops can machine the block for 1g nozzles

 

[TunaTalon]

Im also wondering if the long rod 2.0 would spool up a bigger turbo faster or make more torque in the midrange rpm?

No faster spool, or better off boost torque unless the compression ratio is raised.

No more mid range torque. The longer rods have lower side wall friction and reduced second order vibration. Shorter rods are slightly more efficient at converting combustion pressure to torque at the upper half of the power stroke.

 

[camfast]

No faster spool, or better off boost torque unless the compression ratio is raised.

No more mid range torque. The longer rods have lower side wall friction and reduced second order vibration. Shorter rods are slightly more efficient at converting combustion pressure to torque at the upper half of the power stroke.[/QUOT

Good info! So really the benefit of a long rod motor is the ability to rev higher and freely? That would work well with my auto since i want to cross the 1/4 in third gear and avoid 4th.

What's the highest stroker piston that's out there...want to have a static compression of 10 to 1.

 

[TunaTalon]

A static compression ratio of 10:1 won't leave much room for boost on pump gas. Are you going for race fuel or E85?

My old 91 AWD Talon shifted to fourth at about 110 MPH at 7000 RPM. Some means of raising the Rev limiter past 7500 will be needed to go faster in third.

I have a 4300 RPM stall torque converter behind my auto. It may not spool faster in RPM but it certainly spools faster in seconds, or feet traveled.

For more about the effect of rod ratio and compression ratio please see http://www.kidzuku.com/StrokeOrNot.pdf. I got a little touch of OCD when deciding whether to stroke my 98 Talon or not.

 

[camfast]

Its strictly on e85 fuel

 

[turboglenn]

I've never built a 2 liter ong rod engine but when we build them custom for high performance 2 smokes (i have a rod build thread in the custom fab section) we do it to gain RPM, we lost some low end, but the gains up top are great, be prepared to rev to the moon, and yea, spool should be later too in theory