[Bwinkelsas]

oh man... you throwing in the towel or just considering?

 

[Buickboy]

oh man... you throwing in the towel or just considering?

as of earlier this week I was. outlooks changed a little since then. Im going back to the stock IM for the time being because I have a good tune for that and the JY engine has a 6mo warranty. if I do go back to the cossie Im going to find a way to keep the PCV and make it bulletproof. mechanic says the old engine had high crank case pressure despite the pcv being drilled out and run to a vented catch can -__-

As of right now a JY mtor with 38k is going in, stock IM, stock PCV, light flywheel, CM stage 3 and a torsen are all going in as well. Im gonna swap out the sportlines for the spec focus springs and have fun with the car. well see what happens down the line [thumb]

I DO have a 2.0l that needs a rebuild now... if I can save id either do a 2.5L swap or build a 2.0 with the forged miata crank and other goodies

 

[Urbanspacedude91]

Keep me filled in with this because even though i have 2.3 head i still want a strong bottom end. I think i just differ as far as just 2.0 parts only because i got my hands on a 2.3 crank from a 2.3 ranger. I just love the duratec. Is going to be just a daily driver or a track car??

 

[Buickboy]

has to be my daily, so if I were to build a 2.0 id be looking at a cam in the stage 2 range and ~11.5:1 compression. well see what the next few months hold though, hoping to make a decision either way by summer

 

[Buickboy]

so I now have a 2.0 that needs rebuilding. looked into the intake ports and the divider between the valves in ports 2 and 3 is fatter than the ones in 1/4. is there a reason for this? id imagine itd be a good idea to do some light clean up work to get them to match

 

[Bwinkelsas]

hmm... i could not see a difference between the ports, get rid of the little "lip" at the edge/bottom of the intake ports, use a flap wheel to polish up the ports some and try and smooth out / open up the exhaust ports they seem to have some decent area inside but then really close up right at the edge.

One of my spare heads is at the machine shop getting some work done, ill post some pics when i get it back, end of this week or next week sometime.

 

[1turbofocus]

so I now have a 2.0 that needs rebuilding. looked into the intake ports and the divider between the valves in ports 2 and 3 is fatter than the ones in 1/4. is there a reason for this? id imagine itd be a good idea to do some light clean up work to get them to match

Why not go with the 2.3 head ?

Tom

 

[Buickboy]

hmm... i could not see a difference between the ports, get rid of the little "lip" at the edge/bottom of the intake ports, use a flap wheel to polish up the ports some and try and smooth out / open up the exhaust ports they seem to have some decent area inside but then really close up right at the edge.

One of my spare heads is at the machine shop getting some work done, ill post some pics when i get it back, end of this week or next week sometime.

Yeah mine look about the same except for the divider between the valves. middle two are a bit thicker than the outer. thanks!

Why not go with the 2.3 head ?

Tom

I have the junk 2.0 sitting around and was checking it out. I always thought the ports were all the same within the same head. Maybe its not as much of a diff as Im seeing but i figure Id ask. No money right now do a rebuild anyway lol

 

[1turbofocus]

Nooo ports are not the same , set the 2 side by side and you will see it when you have the funds to go that rought

Tom

 

[Buickboy]

Nooo ports are not the same , set the 2 side by side and you will see it when you have the funds to go that rought

Tom

wasnt talking about 2.0 vs 2.3, like I said the #1 and 4 ports are slightly different than the #2 and 3's in my 2.0 head.

waiting to get the car back still then ill work out a game plan for it/ this engine

 

[Bwinkelsas]

Nooo ports are not the same , set the 2 side by side and you will see it when you have the funds to go that rought

Tom

I have not had the chance to check out a 2.3 head up close, i have not been able to find any pics or comparison pictures. Any leads or pictures of your own?

My only defense that ive been trying to make is that it seem that the 2.0 head flows more then enough for the average persons usage, if not a set of cams i believe would solve that issue.

 

[Buickboy]

Thoughts on this combo?
Head:
Lightly worked 2.3 stock head (clean up, valve job)
Crane STG3 cams (2500-7500 rev range)
Stock size valves, Supertech springs
Bottom End:
11.2:1 Supertech Pistons
K1 Rods
Forged 09+ Miata crank (everything balanced by machine shop)
Ford bearings, ARP studs where it matters
Mazdaspeed Oil Pump, baffle in oil pan

I have a set of CFM cam gears thatll be going on. Thoughts on the pulley set? while the cranks at the machine shop I could have it keyed. vibrations shouldnt be an issue with it all balanced right? Id at least use the waterpump pulley

Bolt-ons: Cosworth Intake Manifold, 3" exhaust, header, 65mm TB and Marcy intake

Id be shooting for 8k max rev and peak HP somewhere around 7500-7700 based on the cams and intake mani design.

 

[Urbanspacedude91]

Miata crank??? That fits

 

[1turbofocus]

Nope

Tom

 

[Buickboy]

Miata crank??? That fits

Thats what Ive read so far, same size everything just need a different tool to lock the crank at TDC because the regular one wont fit. Its a little heavier than the stock 2.0 crank but weighs less than a ranger 2.3 and its under 400 for a factory forged crank. It was updated on the miata when they increased the rev limit so Im sure itll be fine at my power level/ rev goals (if not a little overkill)

 

[Buickboy]

Nope

Tom

well poop then. nm

 

[Urbanspacedude91]

Thats what Ive read so far, same size everything just need a different tool to lock the crank at TDC because the regular one wont fit. Its a little heavier than the stock 2.0 crank but weighs less than a ranger 2.3 and its under 400 for a factory forged crank. It was updated on the miata when they increased the rev limit so Im sure itll be fine at my power level/ rev goals (if not a little overkill)

Thats awesome im going to check that out

 

[Buickboy]

Hmm gp-werks.com offers the miata crank as well as various built engines using it. Sent an email to see if the blocks are mazda based or focus specific.

I know the mazda speed 3 cranks use different bearing sizes than ours, is that true for the 2.0?

 

[Karcas]

Hmm gp-werks.com offers the miata crank as well as various built engines using it. Sent an email to see if the blocks are mazda based or focus specific.

I know the mazda speed 3 cranks use different bearing sizes than ours, is that true for the 2.0?

You hear back yet?

According to their site:

"Genuine Ford 2.0L Forged Crankshaft, a perfect addition to the build of your new engine.....This crank fits, Focus, Mazda, and Miata powerplants..."

 

[Buickboy]

Heard back, he has used that crank in focus motors before. Ive asked for a little more info to see if its a drop in or requires anything special. Hoping to get side by side pics of the two cranks too [thumb]