mazda BP head on ca18

[dash]

from tommey thread.... Interesting swap, as I'm a BP man myself
Would be even nicer if you transferred the BP smoothness over to the ca18 same time, or.... just boost the BP as asked

look much better than a CA head

hmmm... i dunno, I cut all my timing covers like this. I prefer this look vs the BP

heaps of aftermarket parts that a CA owner can only dream of not to mention crazy variety of different rocker covers available.

when a street ca18 can make well over 500hp using mild tomei 260 hyd cams thru a stock intake.... I for one won't ever dream of a "huge aftermarket". Pretty useless imo

BP head swap gets lotsa "coolness" points tho and I must commend the effort

[themadscientist]

Waste of time, but I can appreciate it just from the "yeah, made that fit, bishes" perspective.

[float_6969]

Waste of time, but I can appreciate it just from the "yeah, made that fit, bishes" perspective.

ditto

[themadscientist]

It's like putting small block Ford heads on a small block Chevy. Why?

Now, the dude that made a twin cam L head out of two KA heads, that's worth it.

I have a big port head with solid lifters I think we can fit on the CA. It might take some doin.

[float_6969]

Holy sewer pipe intake ports Bat-FJ!

[dash]

now what do u call the mongrel ? No longer a ca18, seeing as the head writes the check. Block only cashes it

They call ford 2.3sohc with the dohc volvo head swap, "FOLVO"s. Never saw one outperforming the plain ol sohc surprisinly.

I can see the benefits when replacing a 2 valve head... on paper. "datso" who put the BP head on the ca18 referred to a mazda B6 1.6 head adapted to a nissan A15? bolck

ca18 performs fine as it is. Head swap would be more of a 'solution lookin for a problem' imo

Plain ol na BP motors found in 95+? miatas, escort GTs and Kias have hit 400 atw unopened, when boosted
Stock 99 head, stock cams (on built block) touched somewhere close to 500 iirc. I doubt a ca18 would get close
quite a few imported and run the factory turbo BP version
BP is too solid a 1.8 to mess with. dash wouldn't just pluck the head.... grab the whole motor

[themadscientist]

There was a pretty ballsy Miata around here that was running a Familia block with a Miata head. Not sure what he was putting down. He had to chase down my GTS-T. He did and passed it, but not stunningly so. Later he started destroying rear ends. The Miata diff couldn't hang and he even broke FC diffs. I heard the final configuration was a GT-R diff.

[float_6969]

LOL, when you make so much power, you have to use Nissan parts, you KNOW you're making good power!

[boost_boy]

What is the meaning of this? I conclude "None" . Not only is it not worth the effort, but what most here fail to understand is, if you can't tune your CA correctly or have a poorly tuned CA with a BP head or whatever, it will still suck. And for the kids whose eyes are all wide-eyed because they saw this thread, the physical bone stock CA minus the injectors and turbocharger, can handle in excess of 400whp. The final thing is, if you can't tune the engine to match the components and the desired performance you seek, then no engine or combo will make you happy. My CA with JUN cams, ported 8 port head, valve springs, stock intake manifold, 1000cc injectors and a .020 Nissan piston over bore and of course a bigger turbocharger produced better than 536whp Daily/reliably) with air conditioning. But then again, I'm a tuner/builder that completely understand what these motors can and cannot do, so knowledge is power. And by the way, it drives off-boost as if it were N/A. Again, tuning is the key ladies and germs. Trickery (bigger blocks, block parts swaps, head swaps) will only reap rewards if built correctly as well as tuned with precision. My old saying "You gotta spend to win" still applies .

[boost_boy]

On a separate note, I give mad respect to the individual that chose this path. Not only is creative, but tastefully done. And to those who are constantly trying to evolve the CA platform, my post was in no way an attempt to defame your futile and relentless efforts as they are received in awe by "boost_boy aka Dee". This is geared to those that may think something like this is simple and will gain them a super engine. The CA in it's factory form is venerable enough and if you're willing to spend some coin, your desires can be met.

[dash]

mazda parts r pretty strong. I witnessed a full weight FC ET three consecutive 9.6s at moroso. Normal idle (no brap brap)
Stock 5spd and diff. Owner told me a 75 shot lit up the turbo out the hole. Car left like a bat outta hell.
An incredible feat even by todays standards, let alone for the mid 90s.

one particular BP miata build I followed;
1st 380hp atw, et 11.1sec, stock head/stock cam. Amazing performance for a simple setup
99 head/oe cams took it to 493. Intake cam added 38hp, & exhaust another 24(regrinds)
maxed out the t3/t4(50trim to4e) @585. Great all around 1.8 street turbo

maybe for na motors, u could really see the BP head swap advantage?

[themadscientist]

I'm putting rotors in my CA.

[boost_boy]

I'm putting rotors in my CA.

Now look at what's been started! I'm waiting on someone to get creative and put the SR NEO VVL head on the CA's block next Or better yet, quad turbochargers using the small things used on some motorcycles . Gimme a break.....

[themadscientist]

Anybody can use 13B injectors....

[boost_boy]

Anybody can use 13B injectors....

Indeed! And I'm guilty of such an atrocity at some point in my illustrious CA serious tenure, but not many on this forum has experienced what it's like to own a well tuned and smoothly running CA18DET. I love this quest for a bigger CA DOHC motor, but if you don't have the coin, knowledge nor the resources to R&D such a platform, most will be chasing ghost projects. Truthfully, the physical 1809cc or 110ci CA18DET is very well capable of supporting in excess of 600whp and the formula is not that costly, if you're not a cheap-@ss . Budget boosters need to acknowledge the word "BUDGET" and stay on it. Drifters don't need a larger displacement CA18DET and for you guys that are running the stock ecus and injectors, make that work for you first and upgrade gradually. So in short, don't be the monkey that saw, attempted to do, but ended up eating doo-doo (s***) because you failed to pay your dues. Now, twin charging the CA18 is very innovative and would be the only reason I would borrow a component from another car company (perhaps Toyota). I believe that done correctly, this can be very powerful as well as enjoyable

[AFSil80]

Now, the dude that made a twin cam L head out of two KA heads, that's worth it.

McAdam Majors. I bought my third 240 from him. And believe me, that head he built wasn't his first attempt at creating a DOHC setup for the L-series. He had a few hacked up RB25 and SR heads laying around his garage north of Fargo, ND when I met him in 2006.

This was right at the time he said they thought they had it figured out by sectioning the KA heads, but they hadn't gotten it assembled at that point. When that thread made it around the internet, I just sat there grinning to myself while thinking 'Holy s*** he actually made it work.'

[themadscientist]

I feel his obsession and I'm stoked he beat that demon. It is an amazing bit of craziness; far more impressive to me than a a new GT-R's gyroscopic cupholders.

[mdb4879]

I'm waiting on someone to get creative and put the SR NEO VVL head on the CA's block next

Why bother? Go Honda B18C head :P A well PnP'd and built head can flow a bit over 300cfm on the intake, and you have a timing belt instead of a chain and solid lifters/rockers instead of hydraulic (I'm assuming Neo heads use hydraulic lifters like DE heads?).

[tommey]

I am pretty sure he was joking about the SR head.


The CA head is awesome, it makes good power with little to none modification and it is not prone to crack or fail in any way.
If you want variable valve timing the easiest ( ceranly not cheapest ) way would be to use the HKS cam control from the RB26 somehow.

[themadscientist]

What, nobody wants to section and reweld an RB26 head and intake?