My guess is you will make the same power at 2 psi less boost and a little more lag.

 

Sounds good, I'll take over 500whp at 22.5psi

lol

 

I just took a closer look at their CNC porting. The vertical curvature looks amazing!

 

If the porting is done right, it won't increase lag. The X has tiiinnnyyyy stock exhaust ports.

 

Just throw a mechanical fuel pump and 8 ID2000s. Never worry about fuel again.

 

why would they limit X's to less potential than IX's? That's not evolution.

 

This will definitely be interesting to see...

 

Stock for stock it is a better designed head and the differences in intake flow far outweighs the exhaust flow at higher lift.

AMS did this 10 years ago:

Intake side

Lift EVO 8 EVO X
.050" 41.6 56.85
.100" 80.5 101.1
.150" 119.1 147.2
.200" 152.7 185.7
.250" 182.6 215.6
.300" 201.5 234.8
.350" 209.4 252.5
.400" 210.9 265.7
.450" 204.6 274.5
.500" 206.2 280.2

Exhaust Side

Lift EVO 8 EVO X
.050" 34.5 34.1
.100" 67.4 74.1
.150" 104.8 127.8
.200" 138.5 156.8
.250" 172.5 160.8
.300" 192.1 182.6
.350" 202.6 185.9
.400" 207.7 189.3
.450" 209.4 190.9
.500" 211.0 192.6


Can I also request that the whole CT9A vs CZ4A BS stays out of this thread? There are countless other threads about that where egos and dick measuring can take place.

 

assuming you keep the power level the same, and the boost pressure goes down, that's less back pressure on the fuel system so theoretically a little more flow. It might be a negligible difference though.

 

Wow, big difference in intake side! So exhaust was kept small to keep velocities up for turbo?

 

As shown by the AMS comparison, the intake way outflows the 8/9 head, and the exhaust is still better. So it is better. The small exhaust ports are done for emissions, they raise EGT and light the cat faster, same reason the turbo is in the back. There is a lot of material to be removed in the exhaust ports and then the head really flows well. IIRC ER sees a 200* (maybe its 100, I can't remember for sure) reduction in EGT with their ported head. Make no mistake, the 4b11 is an evolution/improvement. It just needed development time in the aftermarket and in motorsports because it hasn't been around since 1990. The ER drag X is wicked fast for only having a 67mm turbo on it.

 

FWIW proper head design says the exhaust ports only need to flow 80% of the intake side. Exhaust gases have much more thermal energy than intake air so it moves faster. If you go too large you loose velocity in the port and despite it flowing a higher number on a bench, it doesn't mean it will perform better.

 

Finally had some time today away from my crazy work schedule to look back on how much time has been wasted on this car in the last couple years.

April 2016 to July 2017 : Car was down for a whole year getting the engine built after failure at the track in 2016

July 2017 to Feb 2018 : Issues after issues with the build that takes six months to sort out.

Feb 2018 : Finally have the car working great, making great power

March 2018 to June 2018 : Six track days in three months

June 2018 : About 4,000 miles on the new build at this point. Going over the car, prepping for next track, find oil on a plug #3.

June 2018 to Aug 2018 : Car sits in my garage, waiting for the shop to have space to take the car in.

Aug 2018 to Oct 2018: Get jerked around by machine shop about the leaky head. Place blame on me. Hardly communicate. Get head back, car is put back together.

Oct 2018 : Get car back. Put 30 miles on it. #3 plug has oil on it again. Nothing was fixed.

Nov 2018 : Send spare head to new machine shop

Nov 2018 to Dec 2018 : Waiting

What the F is wrong with me? I basically enjoyed the car for three months after it being down for more than 1.5 years. Then it's down again for the last six months.

I must be insane. I'm insane, right? The new Camaro ZL1 1LE is looking might fine right about now. Maybe I will go car shopping in January 2019...

 

That is insane. Reminds me of my RX-7 days where it was down all the time and I'm spending $1k to fix everytime something new breaks down.

 

Believe me I went through the same stuff when the modding bug infected me at a young age. The V8 transplant into a '74 Merc Capri was the worst. More down time then up. Drove it across country twice and ended up selling it in Ohio for what seemed like pennies compared to what I put in it. Oh no doubt it was "Hell when it was well" and fun when it ran well but too many things kept popping up.

Leaving things close to stock for me seems to be my new found attitude. The Evo modded was fun but I never got as serious as you did with your X. I'm sure it is "Hell when it's well" too.......but the then the sh&t happens. The down time literally sucks and then you look at what you dump into it. Some people seem to be more lucky then others. Murphy always seemed to jack with my stuff and my wallet.

I do the simple approach now with the '18 Fiesta ST and seem quite content. Maybe a E30 tune like you said in about a year. No more wild adventures. Can't afford it and don't have time for it.

1LE is quit the scooter just to over the top for me now a days. I would imagine if you track it like you have your other ones there will be costs involved but in stock form it will still be a great performer.