Well I spent the day down in Philly, I went to Geno's and had a cheese steak and the headed over here for some desert
:smile: Yummy :smile:



Thanks again ERIC.

I will leave a full update after it stops raining and I can test out the new found power. The car ran excellent on the three hour rain soaked drive home.

Am I the first to run 17%?????

_________________
Doug


When in doubt, Choose the burrito

 

Maybe - but we have been running 19% for many many months.

 

I figured 17% was much safer than 19% since I have already put on 21k miles in 9 months. Plus in initial testing the 17% pulley does not cause any lean conditions and Helix did not have a 19% puley for my hub in stock.

 

Casey,

I'm assuming that the 19% is in combination with software that lowers the redline a bit, no? I was thinking about starting a thread about what seems like a no-brainer to me, i.e. running a 20% (+ or -) pulley with software that would lower the engine redline...get the SC boost at lower RPM--why not!?!?

 

HEY!!!!!!!!!!!!!! I recognize those Pro-Drives.... the Helix Cooper is looking good.

Heard you were down there Doug...know I now why!

 

We have been testing it with the rev limit at 7200...the car has 0 nice miles on the car since the 19% pulley was put on months ago...I flog the car everytime I get into it, and hitting as close to 7200 rpm I can get on each shift. So far we have seen ZERO problems with 19% and 7200.

 

Well i was going to do soem exhuast but the pulley seemed more exciting. I have also heard that the 19% pulley will not pose a problem. It could cause a problem if you are running the car at redline for long periods at a time, but that has not been tested yet.

 

So it doesn't bother you that at 20% and 7200 you are pushing into redline territory for the SC?

 

I agree, with you Maxwell, that moves into the currently accepted limits of the supercharger limit. There was also some other discussion brought up about the water pump having problems with more reduction on the pulley. This is very intersting stuff!! please post more information and driving analysis / feedback!

 

>>So it doesn't bother you that at 20% and 7200 you are pushing into redline territory for the SC?

The only REAL way to test it is to try it :smile:

 

>>HEY!!!!!!!!!!!!!! I recognize those Pro-Drives.... the Helix Cooper is looking good.

dandp - Looks like you need a new sig pic....by the way, what new shoes did you get?

 

>>>>So it doesn't bother you that at 20% and 7200 you are pushing into redline territory for the SC?
>>
>>The only REAL way to test it is to try it :smile:

Exactly. At least we can see somebody putting the extreme stuff to the test and seeing how solid the theories are. No one is saying the SC doesn't lose its efficiency and everything isn't under stronger stress, heat and pressure. At least we will see how long (or soon) Casey's engine configuration will take the beating since things will fail eventaully anyway even under "normal" operating conditions and manners.

 

vdubdoug,
Thanks for the pics. Let us know how the 17% pulley works.
I still like your MC front bumper for your MCS.
Does Eric always walk around with a hammer like that?
I know, it does make things fit better.

 

I don't know why you got rid of those beauties, Dan!

Geez. This is getting scary. The 15% pulley reduction is great. No problems and night and day difference between 15% and stock, IMO. The MCS is much better now. But 17%? 19%? 20? Oh dear, where will it stop? When engine start failing? I'm scared but also very excited, I must say! :smile:

 

WOW, so what kind of boost and HP are we looking at with these pulley's?? I would imagine that the water pump would start to suffer from cavitation at these increased speeds... Anyone know if Randy is going to be installing 17%er's? GOD I hope my car is out of the shop in time for the Florida Pulley party.

 

That's a great question. I mean 15% to 17% - aren't we just talking about a 10% or so increase in power? I mean is it just 2 more HP or lbs of torque? Granted the boost will be higher earlier, but not a whole lot. But then again it's probably noticeable and should be the same cost as the 15%...

 

I hope the GIAC tuning will take the 17% into consideration, HP is HP and I'll take all that I can get. Waiting for GIAC is almost as bad as waiting for my car was. I ended up buying off the lot when I couldn't take it anymore, but I don't want to settle for inferior software, so the wait continues.....

X2

 

>>I mean 15% to 17% - aren't we just talking about a 10% or so increase in power? I mean is it just 2 more HP or lbs of torque? Granted the boost will be higher earlier, but not a whole lot. But then again it's probably noticeable and should be the same cost as the 15%... [/quote]

I would assume that the real difference and benefit would come in moving the torque and horsepower into the lower RPM range. Clearly, the max HP would only be felt at the very top (as usual), but wouldn't it be nice to be getting much higher HP at say 3000 RPM? For city and even AutoX driving, I would think that it would be absolutely phenomenal...

 

VdubDoug,

Photos don't do your car justice. Are you now 100% stealth, a wolf in sheep's clothing? I see the MC front bumper, chrome grill, black plastic side gills and lack of rear spoiler, is the bonnet MC or MCS? I can't tell from the pics.

p.s. I recognize the late 1970's MGB as the display tray for the various pulleys. Looks like Eric has one sweet garage.
_________________
BLUBELLE - 2003 MCS IB /W Premium, Sport, Cold pkgs, Lapis blue interior, Magnecor wires, Alta Pulley, Moss Skid Plate, Chrome Trim Interior

 

Well i am going for a drive with the 17% pulley on drive pavement. From what i couold tell last night the boost comes on sooner. I am also using this pulley on a car that gets driven everyday and avaerages 500 miles in a week. From the early data I have seen with a wideband O2 sensor the Fuel Air ratio mixtures are just fine. I have not seen anyone give that kind of data on a 19% pulley yet.

Putting the 19% pulley in a car and running it down the highway for a few runs is great. But I want want to see daily driven facts, O2 readings as well as 1/4 times before I go with it. It was tested in a car but that does did not see many miles of road use with the pulley, The car did run at the drag strip and posted a 14.8 but with a high 60ft time and not shifting into 4th at teh end of the strip). As far as water pump Cavatation goes there is a big myth there. If the car was running at 7200 rpm's (or close to redline) for a few hours on end (road Racing) you might run into problems (This has not been tested yet as far as I know). What has been tested is the 15% pulley on road racing cars and no ill effects have been seen so far.

I want more info :smile:, Knowledge is Power!!!

I plan on taking my car to the strip to see what kind of power it gives me there. I am a crappy drag racer (novice) and If i keep my 60ft tiems consistent (2.8 to 2.7) i want to see what my 1/4 mile time and trap speed will be with a 17% pulley.

 

MGCMAN,
That blue Cooper Is Eric's test mule (Import) My car is Electric blue and I have a few more stealth mods planned for it soon. And as Always Pictures will follow.

 

Now I see said the blind man.

 

Our pulley on our car is used in conjunction with our own custom software we are testing. Additionally the car does see a fair amount of street miles and is also race track tested and trashed. Remember EuroTuner GP Shootout a few months back that Blue Thunder took part in...well it was cranking away with the 19% pulley installed. With the software we are running we are having no problems with the A/F mixture.

 

Casey,
That is what I wanted to hear. Do you have dyno's and Air fuel graphs and 1/4 mile times to post up? I would like to see them if possible. How many miles have you put on "Blue thunder" since the 18% pulley? I like the way the supercharged car sounds on the video :smile:.

Is there a link on the web to the Eurotuner article?

 

Casey,

Very interestiing, but I have a few questions as well....

1. I notice that you are running the larger, more efficient water/air intercooler on that car. What about running the 19% pulley on a car with the stock intercooler, can the stock intercooler keep uo with the extra heat load?

2. Are you running colder spark plugs with the 19% pulley, and if so how many heat ranges colder? I would think you would have to in order to keep detonation under control.