UDP's and JET super chips

[SHOMac]

Alright, as somewhat of a newbie here to the forums
(about 2 months of reading and learning) I have yet to find
sufficient information on the under drive pulleys and the jet performance super chips.

My car is basically stock right this moment. Am debating whether
to add a little electric supercharger and a y-pipe for the intake
(I know what I mean so dont ask ) to get some forced air when
i want to and just stock CAI (minus saxacone) when i dont.
But ill work on that later.

Mainly, I want to know more about the UDP and if the JET chip is worth anything.

 

[SASHO91]

let us know how that E-S/C'er works out...


However, the under drive crank pulley is an ok mod. The off the shelf chip wont help much, if at all (from what i have heard). You'll want to go with a tuner.
BTW, a search for the tuner will yeild you many results.

but really.... dont even try the electric S/C'er.... you'll waste your money, and possibly hurt your motor. You can do a search for that too, as that has been beat to death on in discussions

 

[Mr Anonymous]

They are worth as much as you can sell them on eBay for after you realize they did nothing for performance.

Just about any modern computer controlled car can benefit by some modifications to the factory fuel and spark tables, but buying an off-the-shelf chip isn't the way to do it. A real custom tune, customized for your car, is the only way to go.

WRT to underdrive pullies, these cars they just don't do anything to justify the expense. If you buy a Camaro or Mustang, then maybe, but on a SHO it's just not worth it.

Welcome to the forum!

 

[SHOMac]

What exactly makes the E-s/c bad?
I mean i tried it out without the switch and it seemed like it blew just enough air to make a slight differance off the line.
Granted I didnt try actual air in the intake but was hoping a little would make my butt dyno get a little jump
Also like i said i havent done exactly all my homeowrk but i really want to try myself since ive been thinking about a e-s/c for a few years with past cars.

 

[SASHO91]

whats the matter with it?

Its electric....

The amount of power needed is way more than what that 12v motor in that fan you have can push.

If you really want to go the E-S/C'er route, i suggest you look at thomasknight's products. However, the weight that this system will add would probably neglate any gains. Another is the E-ram... which has actually been proven for small gains on small engines(pretty much anything under 2.5l, possibly 3l.) but still its only on at WOT, so the gains would be less than N2O, and it would cost just about the same. (well, that is if you dont count all the bottle refills, but then again thats another story).

Like i said, a search will show you all the info you need to see. But IMHO, its a waste of money on these cars.

 

[Mr Anonymous]

What exactly makes the E-s/c bad?
I mean i tried it out without the switch and it seemed like it blew just enough air to make a slight differance off the line.
Granted I didnt try actual air in the intake but was hoping a little would make my butt dyno get a little jump
Also like i said i havent done exactly all my homeowrk but i really want to try myself since ive been thinking about a e-s/c for a few years with past cars.

A REAL electric supercharger, along the Geoff Knight concept, may work to a degree, but it's not anything like the $19.99 MARINE BILGE BLOWERS that you see on eBay. I suppose if you put like 3000 CPU fans inline and ran them at 36 volts you could match the CFM of a bilge blower.

 

[SHOMac]

Well, albeit I am really gullable.. until i find out for myself.
The person I bought the e-s/c from said itll push an extra ~350 CFM
Well, seeing as a stock SHO pulls in (insert correct number here) anything
above and beyond that being added would in theory help.
Chalk it up to experience in learning if it doesnt do a darn thing.
Now if it does ill come back and say 'nah na na na nah na!'
but most likely ill come back with my premortial tail between my legs and feel dumb.
One can never be fully satisfied until the try and fail a few times before conforming.

 

[SASHO91]

as far as i know, no one has actually tried it on a sho... take that as you may....


350cfm is what it will push.... IIRC, the V6 motor needs somewhere around 170cfm to run at 7k@around 80%VE... i would assume that the V8 is slightly higher....
sorry i cant put numbers down, as i dont have the formula for finding the CFM of the motor handy...

EDIT: found it. CFM= C.I.D x RPM/3456 x VE
But im not too sure on the VE of the V8

 

[HiTechRV]

VE will vary - the dual intake manifold gives 2 VE high points (even without 2 full intake paths). Assuming 100% gives something like 425 CFM at 7k RPM.

I toyed with the idea of a leaf blower and an inverter, since it is a cheap way to get CFM's in this range or higher, but you have to have some kind of valving system so the engine can get fresh air directly when the electric motor is not running. (Yes, a leaf blower, check out the videos of the kind of dyno gains people got with them on dyno runs).

 

[SHOZ123]

I've had the single crank UDP for 4 or more years. When I put it on the difference is very subtle and hard to tell if it does anything. But you get use to it and if you take it off it will be immediately noticable.

I had mine off searching for problems and put it right back on. Also found out it the aluminum body of it was buggered up pretty bad by a shop down south when thy put it back on after swapping motors.....

 

[SHOMac]

I was thinking mounting the e-s/c right about where the Stock CAI inlet is.
Theoretically, I should get the same air as what is being sucked in now.
Only difference being more being forced in.
About the fresh air getting in when the e-s/c is off.
Thats where the Y pipe inlet comes in handy.
Two ports, one side for the e-s/c and the other for the air when its off

 

[stephen newberg]

This is not my field or anything, but is not the point of a supercharger to compress the air charge? I somewhat suspect that a fairly normal 12 volt driven fan system will not be able to produce a lot of compression.

pax, smn

 

[SASHO91]

air follows the path of lease resistance.... so if these E-S/C'ers actually produce enough CFM to pack into the motor... well it wouldnt, as it would just push out the other part of the Y(for the N/A side ). that's where a check valve system as Jim stated, would be needed.

what i have thought about doing was purchasing one of the filters that has a hose attached to the end of it(for placement purposes), and attach the e's/c'er there. While you would still have some "boost leak" from the filter, this would be the simpliest way to install it without restricting the airflow in the N/A form.

 

[SASHO91]

This is not my field or anything, but is not the point of a supercharger to compress the air charge? I somewhat suspect that a fairly normal 12 volt driven fan system will not be able to produce a lot of compression.

pax, smn

Very true. however, the two systems in question, The E-ram- which uses something like 40+ amps or so(not too sure on that number, but it is very high amperage) spins the "compressor" at like 26k, and moves like 700cfm. While the unit itself dosent compress the air, its the restriction of the motor that dose this. Think Positive displacement blower....
As for the thomasknight or geoff knight (not sure on the name), they use electric motors cuppled to the compressor side of a supercharger basically.... but their system utilizes battery packs in the trunk. (i would throw a couple odyssey batteries back there as they only weigh 1/3 of a regular battery, and are dry cell, IIRC). However, their system can only be used for no more than 15 sec's. as the batteries would need recharging(another reason for the odyssey's)... but im not sure how this system is plumbed into the intake track(restriction). As were the E-ram is just a de-energized e-motor and spins when its not on(according to e-ram, but that would make sense though)
www.electricsupercharger.com for the eram.
http://www.boosthead.com thomas knight...

 

[stephen newberg]

Interesting. That does not look like a 40+ amp wiring harness to me. Compression due to restriction has to occur at both ends of the cycle system, by the way, which means that the fan needs to be able to take the resulting pressures if any compression is actually to occur. Looking at that fan, and knowing a touch about turbines (and electrical questions), I have doubts.

pax, smn

 

[SHOZ123]

The only way this would be of benifit is if at WOT and 7000 rpm you did not.have 0" Hg of vacuum. Easy to check with a vacuum gage.

 

[stephen newberg]

Exactly, Paul.

pax, smn