2.5L to 2.2L conversion

[OmniSRT4]

Quote:

Originally posted by Dion Ricketts Well, if both the 2.2 and 2.5 are somewhat rpm limited, what about destroking a 2.2? Has anybody gone down that road? Just an oddball thought.

You could rev even higher but at what cost?

Consider this, we dont have VTEC. With only 1 cam profile to work with, there is a balance that needs to be acheived between motor size and rev limit.

[spoolboy]

Wow. This thread is a waste now.

Can I piss too?

Build a 2.2 and then make it a 2.5 and the 2.5 will loose.

OPTIMIZE a 2.2 and a 2.5, the 2.5 will win.

[Dion Ricketts]

Quote:

Originally posted by MachineHead Here is a link to a car with a destroked 2.2 http://www.thedodgegarage.com/turbo_imsa.html I heard the car was destroked to 2.0.

Per the cid on the hood, it is a 2.0. That car is part of the reason I asked. The other part of the reason I asked is because I found a crank that would make a 2.0 out of a common block. It's even forged. But at what cost (echoing you Akuma)? Is it worth the effort?

Ya, it would probably rev to 8000, and pull most of the way, if the motor can breath. It would probably take a 16v head to make any real power, but even then, would it make enough to make it worth it? That's why I am asking, to see if anybody has thought about this.

It makes me wonder when all the "big name" cars (WRX, Evo) have turbo 2.0L motors. Then again, maybe it isn't because the factory found an optimum size, but because the rules limit them to that size. I don't know, but isn't that the purpose of this forum? To ask question and share information?

I dunno, maybe I am just thinking to hard. That would explain my headache.

[OmniSRT4]

Quote:

Originally posted by spoolboy Wow. This thread is a waste now. Can I piss too? Build a 2.2 and then make it a 2.5 and the 2.5 will loose. OPTIMIZE a 2.2 and a 2.5, the 2.5 will win.

The entire threads purpose is debating this very statement.

I dont agree OR disagree with it. There aren't enough facts.

Its really starting to annoy me too because I need to pick one or the other for my motor.

[OmniSRT4]

Quote:

Originally posted by Dion Ricketts Per the cid on the hood, it is a 2.0. That car is part of the reason I asked. The other part of the reason I asked is because I found a crank that would make a 2.0 out of a common block. It's even forged. But at what cost (echoing you Akuma)? Is it worth the effort? Ya, it would probably rev to 8000, and pull most of the way, if the motor can breath. It would probably take a 16v head to make any real power, but even then, would it make enough to make it worth it? That's why I am asking, to see if anybody has thought about this. It makes me wonder when all the "big name" cars (WRX, Evo) have turbo 2.0L motors. Then again, maybe it isn't because the factory found an optimum size, but because the rules limit them to that size. I don't know, but isn't that the purpose of this forum? To ask question and share information? I dunno, maybe I am just thinking to hard. That would explain my headache.

Is that crank still for sale or just LISTED?

You see, MP *used* to offer a 2.0 crank for our cars. Ive seen it advertised but you cant actually buy it anymore.

Consider also you will need custom rods.

The last thing you need to consider of course, is what I said earlier, cam profile.

Even a "hot" cam can only go so high. If this is a street car, the best 2.0 cam has a 1500-6800rpm range. Any higher and you would have a poor running/idling car that would fail emissions.

So, yes, you could do 8000+ but you wouldnt have a cam that could support it. If you DID, the car wold run like cr*p.

So unless you have a cam phaser or VTEC in the works or are building a race only motor, dont bother.

[Dion Ricketts]

Quote:

Originally posted by Akuma Is that crank still for sale or just LISTED? You see, MP *used* to offer a 2.0 crank for our cars. Ive seen it advertised but you cant actually buy it anymore.

I wouldn't even have posed the question except that I ask a dealer if it was still available. He came up with 4 in the USA (If memory serves). Sounds like it may not be available anymore, after these are gone. List was 900, but he said that he doesn't sell stuff for list, and quoted me 270.

I finally found the article on the 2.0 salt flat LeBaron. Sounds like he ran the 2.0 because that's what he had, not because it was better.

On the other hand, it made something like 360 hp @ 21 psi (big valve head and custom cam).

Also, it sounds like the Evo (and perhaps the WRX) are a little on the weak side until you wind them up (3500 rpm or so).

Oh well, it was just a thought.

Quote:

Originally posted by spoolboy 2.5's make torque http://www.gtneon.com/pictures/MM2003/mm03-11.JPG http://www.gtneon.com/pictures/MM2003/mm03-12.JPG Some things got a little twisted. We fixed it. I wish I could post pics in threads instead of uploading or posting links.

You can! Just use the IMG button instead of the http://.

Now, I'm pretty new at these 2.5's and I find it almost unbelieveable to get 300hp out of these engines, tho, I haven't done anything to mine yet.

[spoolboy]

Quote:

Originally posted by EvilSpirit You can! Just use the IMG button instead of the http://.

I see it worked well for you. NOT.

[glhsken]

Quote:

Originally posted by EvilSpirit Now, I'm pretty new at these 2.5's and I find it almost unbelieveable to get 300hp out of these engines, tho, I haven't done anything to mine yet.

300 from a 2.5 takes some work (but not hard)... Torque is easy with a 2.5.

[OmniSRT4]

Quote:

You can! Just use the IMG button instead of the http://

LOL!

Its disabled, so no, you can't.

Quote:

Originally posted by EvilSpirit Now, I'm pretty new at these 2.5's and I find it almost unbelieveable to get 300hp out of these engines, tho, I haven't done anything to mine yet.

Find it unbelievable all you want, but you can get a lot more than 300hp.

After reading various threads in this forum I'm beginning to realize that. Some of these guys go all out for power, or so it seems, running 12, 11 or even 10 sec in a 1/4 mile. That power is nice, but, I'm not looking for that kind of power...maybe 50-75 horse increase; I still want my car to be dependible. Where would I start?

ps Turbos 4cyls are "new" to me, but, MoPars aren't.

[notenufboost]

so have we really decided what engine is better? the 2.2 or the 2.5? cuz im planing on buying another p body and would liek to know what you guys determined. haha

[Zed]

Quote:

Originally posted by notenufboost so have we really decided what engine is better? the 2.2 or the 2.5? cuz im planing on buying another p body and would liek to know what you guys determined. haha

I think we can all agree lighter 5 speed cars like the 2.2, heavier auto cars like the 2.5. Where exactly is the cutoff between light and heavy though? Omnis are around 2300, loaded Daytonas a bit over 3000. 2650lbs?

[Turbolag87]

my choice would be 2.2 all the way. I have driven both, and i personally LOVE the top end of a 2.2. Although the tourquie 2.5 feels quite impressive downlow. But i love my top end


Danny