Crawford Billet Power Blocks

[Dezoris]

Hey bro trust me it works.
Looks good.
That's totally normal.

You just need to buy it, don't worry about any real data to back any of it up or installation manuals, or anything else. Been doing this for 20+ years.

[twag4]

Most of the time, longer intake runners (however they are employed either different manifold or spacers) will add to top end. It was a simple way back in carburetor days to get a good performance boost in the upper half of the RPM range. (Think stoplight to stoplight and drag racing) Carb spacers also did the same thing, but with less affect. Sometimes it actually robbed bottom end performance though. I have built a few Chevy and Ford small blocks back in the day, and this is some of what we did. For more bottom end you went low rise dual plane manifold.
Edit: BTW I did forget to mention that adjusting and sometimes rejetting the carburetor was a must. Curious how this is possible without a remap of fuel injection at the very least

[nelsmar]

Originally Posted by King Tut

No brackets in the pics bro. I agree that this was probably developed after looking at the FA20DIT. They probably want to sell them to the new WRX owners as TGV type deletes. Who is going to be the guinea pig to buy them and give us an independant dyno? I mean you get all those pieces for such a low low price.

I'll do it. Who wants to chip in for dyno time? :P I'll do OEM rom vs OEM rom + spacers. Tuned rom vs tuned + spacers. And I can try to squeeze in FI vs FI + spacers eventually.

[nelsmar]

BTW that was 100% serious. I am ordering a set today. Lets find out how well they work! I'll try and get a car in for baseline this weekend.

[MJ_Redondo]

Just saw this announced by Crawford Performance, basically:

"our BPB sandwich between the cylinder heads and the intake manifold to create longer intake runners. The lengthened intake runners enhance the volumetric efficiency of the engine which translated into an increase of 19 Horse Power, 15 Pound Feet of Torque and narrowed up the torque dip by 300RPM on a totally stock (GT86)."

How exactly does this work? I'm trying to picture it. $400 for +19hp?

http://www.crawfordperformance.com/p...er-blocks-bpb/

[Bach415]

Originally Posted by OrbitalEllipses

Car people are like old school gun people - metal good, plastic bad! Even though the thermoplastic resins are actually superior from a performance AND manufacturing standpoint.



15hp no tune? Get a tune and you find 15hp...combing the two won't be additive for 30hp, I guarantee it. If you can make 30hp on pump gas with a just a tune and these things, I'll ask Hachi to ban me.

I know it's not gonna end up being combined. But hell this is a new platform. A lot of things can happen. We won't know for sure until someone gets it and runs dyno then tune it.

Sent from my SM-N9005 using Tapatalk

[Genomaxter]

The reason Toyota/Subaru probably didnt raise the manifold was due to manifold to hood clearance for pedestrian impact regulations if this modification indeed works.

[Dezoris]

Originally Posted by nelsmar

BTW that was 100% serious. I am ordering a set today. Lets find out how well they work! I'll try and get a car in for baseline this weekend.

It's not even worth the time to give the guy the money for them. He is notorious for not answering even the simplest questions about his unicorn products.

The fact that you are changing the fuel stratification on the port injection and likely direct injection side is enough for me to avoid it. Correct me if I am wrong but your port injection spray is now altered and the airflow change would almost certainly require tuning changes.

[nelsmar]

Originally Posted by Dezoris

It's not even worth the time to give the guy the money for them. He is notorious for not answering even the simplest questions about his unicorn products.

The fact that you are changing the fuel stratification on the port injection and likely direct injection side is enough for me to avoid it. Correct me if I am wrong but your port injection spray is now altered and the airflow change would almost certainly require tuning changes.

Sure it could alter it. And that is one of the reasons I questioned it and called them out on facebook. Because your messing with a lot of things right there. Also note that 80% of the fuel after 5,200RPM is DI injection so very little fueling would be applied. Now that 20% fueling may alter it but I'll gladly do the work to find out. Prior to 5,200 you are running pure DI until 2,400RPM. Which it quickly interpolates to 50% as you get to 2,000RPM.

[King Tut]

Originally Posted by Reaper

these need to be polymer and half the price. I got it, billet is cool. But not needed in this application IMO. The factory intake isnt even metal.

Has anyone asked Toni @ FA20Club if he could make some in the same design but in polymer? I hear he has experience in this area.

[nelsmar]

Originally Posted by King Tut

Has anyone asked Toni @FA20Club if he could make some in the same design but in polymer? I hear he has experience in this area.

LOL

[stevo_12v]

Whats up with the hate/comments about Crawford?

[strat61caster]

Engines operate on a lot of fluid dynamics assumptions. Every time a valve is opened or closed there is a sonic boom as the pressure differential is so great that the gases moving around break the sound barrier, there's a shockwave from this that can be used to aid (or hinder) in airflow not only to the single cylinder but to the system as a whole. By running simulations and some experimentation an intake system is tuned to the engine for certain characteristics: sound, efficiency, performance etc. by varying the size of the resonant chamber which is what this mod does.

Pretty picture of a 2 stroke engine which relies on exhaust tuning to get more power and efficiency:


Now the real question is "is this too good to be true?"

My answer is "probably", if 20hp was this simple Toyota would have done it. Maybe the idle is rough, probably to get the most out of it the tune required (it is required for the gains they claim) isn't compliant with emissions. I'd gamble that there's a folder in Toyota's hard drives with at least a preliminary analysis of this intake design that was discarded for some reason or another.

If you want 20hp, don't care about passing emissions or an aftermarket reflash then it looks pretty trick to me.

[King Tut]

Originally Posted by stevo_12v

Whats up with the hate/comments about Crawford?

Their support of the BRZ/FR-S and FA20 motor has been a joke up to this point. I have yet to find one owner with their turbo kit. Their built motor price is a joke. They tried to convince us that our motors were all going to explode if we didn't buy a built motor, and now they are selling spacers as a 20 hp part.

*Crawford is not a paying vendor to my knowledge, if they are, I will delete my post.