I have to go reflash for my new pulleys and RT Cats and was wondering if the Crawford should be added b4 I go. It is a 2 day road trip if I spend the night again.

I had it before and ATI said, yes it does allow more boost as does my wide open exhaust. I know it causes your car to be leaner than the stock plenum on the A/F Chart so I was wondering if this is a good mod for 9 lbs or not.

IWO's is there a point in the reflash where it can't add anymore fuel, Ie, it is maxed out (the flash?)

I will be supplementing my fuel delivery with the injectors and fuel pump in my sig and want everything in place b4 making this reflash trip.

Thanks

 

I would do it. Simply on the basis of an even distribution of air to the cylinders. It will take a more aggressive pulley to see the same "psi" but you will still be moving the same amount of air. The only concern would be adding enough fuel and you are taking the measures to make that happen.

 

Now the big question is does he or anyone have one after this tragedy of his is production halted temp.?

I would understand if so.

 

Doug posted on the thread stating that orders would not be delayed, but I would certainly understand if they were.

 

Well, I posted a similar question on this a while ago. From the Crawford guys, they said at that time that the plenum added about 5 rwhp to a boosted setup. Hardly enough rwhp gain to make you run out and buy a plenum for a boosted setup.

 

I still wonder how much added benefit there is to the more even air distribution to the cylinders. I think anytime you can create the same (or very close to the same) environment in each cylinder the better. Same reason for equal length headers IMO.

 

It's just harder to tune on the dyno with it but I am not dyno tuning I am TS tuning. It allows more boost which is good, I'm not doing it for 5hp I am doing it for yet another safety buffer, if indeed that proves to be the case.

Thanks

 

you will benifit more from the plenum on a FI car then an NA car...

 

Yet another mod b4 flash hehe now to get on the list, his website is down.

Anyone know his number please PM me.

 

jason, actually from the crawford guys plus some engineering background on my part makes the opposite true. In N/A form, it increases the volume of air taken into the cylinders which increases power, period. But with air under pressure, things change and the stock plenum will flow better cause the places where it doesn't get enough air into the cylinder(ie. the front ones), air is 'forced' into there via boost. So the increase in volume is balanced out by the effect of pressurized air. It is even more obivous when you think of the fact that the pressure of the air in the plenum decreases with increased volume in the plenum.

IMO, spend the extra money on rods or something else to strengthen the engine.

 

Yeah,

You are bringing in more air blown so the 1.2 chamber starved theory doesn't apply but it does allow for more boost (room for iar b4 it meets backpressure right?

Or is this still up in the air?

Rods, pistons etc mucho dinero like 3k installed for a rebuild.

Plenum 500.00

 

not to bring up this debait again...

the crawford plenum to my knowledge was developed on a flow bench. cars do not intake air like a flowbench produces in a normaly aspirated engine. on a forced induction car the flow is more that of a flow bench produces. it is comon on OTHER CARS for simiarly designed plenums to decrease power due to air loosing its direction and being caused to swirl in the plenum and not have as direct of a flow... but in forced induction applictions it doesnt matter as much the design for the fact the air is forced in...

i do agree with adding strengnth to the engine... pistons / rods / etc...

 

pistons / rods / etc

I'll do that on engine 3 if needed

 

ahhh, I wasn't thinking pistons, just rods. They are like a grand, of course, that not including labor, lol. For $500, it is a real good deal, of course, the plenum is $650 with the strut bar. I am sure you could find other things to do with that money, heck it could go towards a suspension for me on my car to go along with any engine mods. Not ******* the plenum in the least, it is the best mod for an N/A car, period. Just not convinced that it is all that great of a mod for FI. After all, the crawford guys did quote like 5 rwhp for a boosted car, nothing to get excited about.

BTW, glad to see you back, max.

 

And you can only use it if you go centrifigal. Nothing that mounts on the motor can use it. Granted, there is only one thing that exists (Stillen) currently but....

 

Or turbo for that matter. This interests me and probably every1 else out there with the plenum that is going FI. I dont really feel like plopping down another 200 bucks for a stock plenum. Worst case scenario I'll trade w/ a local Z. My main concern is the possibility of always running a leaner state on the front two cylinders opposed to the rest of the banks. Guess there's only one way to find out...

 

Called Doug gave him my best, Plenum being made. Hey thanks LR for the info and WB.

That's short handed chat ling

On a 7lb kit with Crawford I was 6.2

So on a 9lb kit I should be 8.2?

We shall see works for me.

Plus it's just another cool pic if anything lol.

 

You may be at 9 . . .Paul was pushing 7 psi with his plenum at redline. Keep us posted!

 

You know I will! Plus I am tuned correctly and have more fuel.