Thanks very much for that advice. I think I will take it

 

When a gas expands without doing work - it cools - cockpit evaporator in your AC
When a gas is worked on to compress - it heats - front condenser in your AC

Yesterdays comment was "off the cuff", I just went back into my calc. sheet to confirm.....luckily I wasn't too far off. I even impress myself sometimes....
See attached comparison of OEM v NWDCAI
for stock pulley setup and 14.5psi MAP at WOT and 6200rpm

L8tr - PS - I cant recall where I got the Throttle body drop from but I do recall it was guestimated at WOT somewhere to be about 1psi through the 74mm body. My calc sheet was set up to allow this to be changed to 80-82mm if need be.

Obviously these numbers would be accentuated with the larger cfm's that a pullied setup would impart.
And it works on a squared function - so increase cfm by 10% and you increase the pressure drops by 21% and the temps go lower again.

And - this lower value should be the pressure used when calculating your Pressure Ratio....MAP/SC Inlet pressure

 

Thanks, that sounds a lot better than $550. If it looks like I need them, I will probably go that way.

 

Ok, good enough for me, thanks and sometimes you impress me. That isn't easy to do!

 

Just to be clear: you can install the 65mm OR 178mm pulley without supporting fuel system upgrades. To do both, you need some upgrades.

For 178/65 stacked, I recommend at least the following fuel mods:

• upgraded fuel pump
• upgraded fuel pressure regulator & filter
• looped fuel rail
• 550cc injectors
• WBO2 or dyno-tuned with WBO2

I also have:

• larger fuel lines
• reworked fuel fail with larger inlet
• conversion from return-less to "regular" return style rail

For intercooling I recommend at least:

• IC pump upgrade
• heat exchanger upgrade

And seriously consider other intercooling upgrades such as:

• Rudy's single-pass IC
• IC insulation (baked potato mod)
• IC reservoir (think of it as a heat sink)

Switching from a 62mm pulley to the stacked pulleys and getting a Eurocharged tune gained me +43 RWHP and +52RWTQ.

 

That is some crazy HP to the crank and still staying out of lien trouble. Never thought I would see those numbers. Good work man...

 

In your OP you mentioned "Insulated intercooler" - is that the stock 3 pass high flow job or an insulated RCompart single pass lower flow cooler?

b22b

 

I would say that is the Rudy cooler.... which I will soon be ordering up myself. I won't be stacking though and I doubt I will have the patience to build this fuel delivery system. It is just more NHRA won't like...lol.

 

I did the baked potato mod on my intercooler. Here's what's changed. It takes longer to get up to temperature after a cold start. When I park after a drive it holds the heat in and takes longer to cool back down. My IAT's are a few degrees hotter with the insulated intercooler at cruise. I'm not a fan of the thermal coating or insulation on the intercooler. Apparently some air flows underneath it while moving and helps cool it down.

Les

 

I have an OEM intercooler because that daggon, no-good, Rudy announced his new single-pass intercoolers AFTER I had already spent MORE MONEY to replace my leaking OEM IC.

 

[QUOTE=boostmonkey;794938] any more runs at the track??? Really thinking about ur stacked set up ...how do u like it over the 62mm ec pulley ??

 

[QUOTE=Roncombs25701;795147]Yes, ELEVEN more runs.

I was working on my launches trying to figure out how NOT to spin with the new-found torque. The good news is that I got it, and broke into the ONE POINT SIX second 60 foot club with three 1.69 60' times. A 1.6 60' time feels like being launched from a slingshot. It's great.

Even though the density altitude was a lot higher (2600 ft, 83 deg. F.), I was able to back up my prior 11.859 with a barely faster 11.855, an 11.86, and a bunch of 11.9s and 12.0s. My favorite run was an 11.95 @ 115.8 mph without ice cooling.

I love running 5 tenths faster than I did with the 62mm, so, yes I love the stacked pulleys and Eurocharged tune combo.

On the street it's just an animal now. The big difference is the low end torque. It is so easy to drive like a hoonigan because I am just a little more throttle away from the tail wanting to step out so often. Fortunately it is easy to hold it out a few degrees with a little counter steer and keep accelerating. It is not one of those cars always wanting to swap ends on you.

 

i saw what you wrote before you changed it!! i have a wavetrac in mine now so swapping the back is more fun when theres 700 ponies pushing it!

 

LOL! Dangit! I threw that little jab about the P-car in there for you, but it felt like kicking a man when he's down since you have engine trouble so I edited it out. Not fast enough apparently lol.

 

you hit the nail on the head!! NOT FAST ENOUGH! HAHAHAHAHAHAHAHAHAHA!

 

HI Matt
I am considering stacking, And I was wondering if you think I could be successful without the looped rail, as I just installed new injectors & tune to fix my lean problem. Also can you tell me what WB02 is?
Thanks Barry

 

WBO2 = wideband oxygen sensor [& datalogging]. I have the Innovate Motorsports LC-1 WBO2 and OT-2 OBD-II scanner and datalogger and I love it. It requires an iphone/ipod; I use an android phone now, but older used iphones are CHEAP. I keep an iPhone 4 around just to use with the OT-2.

I can't recommend running stacked pulleys without fuel rail and fuel regulator upgrades. It might be ok, but I am very conservative about these things. I would definitely NOT try it on the stock pump. The important thing is to monitor your air/fuel ratio with a wideband O2 on the street or, even better, tune at a trustworthy dyno shop with one.

I upgraded the fuel pump and regulator just to run the 62mm pulley. I modified the rail, upsized the lines (again) and went to 550cc injectors to go to stacked pulleys.

 

Thanks for the quick reply
Barry

 

Did you replace all the fuel lines from the pump to the rail? That's a pretty big job.

 

+43 more hp compare to 62mm