Possible Supercharged 2000 GT Trade

[Deblaca]

Lol thats why Im chiming in, that blower will not physically produce that much boost on even a stock 4.6 2v.

The guy who is selling you the car doesnt seem to know what he is talking about.

Its a blower, not a turbo. Boost doesnt really fluctuate from gear to gear and if it does its very minimal, certainly not 21 to 25 psi. Blower spin at a set rate given RPM.

Turbos can fluctuate and create more boost in higher gears since there is more load.

The head unit maxed out would have a hard time producing more than 15 psi or so on that motor

Regardless, sounds like a good deal to me, first thing you may wanna do is get it to a reputable tuner and have them check out the tune and you can get an accurate measure of boost. power. a/f

Thanks for explaining it. Yeah if I end up going ahead with this (as I probably will), I live 15 minutes away from R/T Tuning. Don't know if you've heard of them, but I'll take it over there and have them check it out.

He admitted that he really doesn't know much about cars, the previous owner built it. I wouldn't be surprised if the information was wrong. All he did was add a smaller pulley, different belts that don't wear out as fast, and a head unit inside the car.

 

[Orange 94]

Yeah 21 seems high.

I think taking it to a dyno to see how it actually runs would be a good idea.

 

[MustangChris]

at 12 PSI i'm making 500 HP... maybe he got his 1 and 2 mixed up.

welcome to the site! Tell Belbino we miss him!

 

[chris91]

Trade and never look back.

 

[Deblaca]

Little bit more info...

Front seats are corvette seats.

First owner did all the work, he owned how own performance shop. Second owner drove it very few miles, mostly to mustang events and get togethers apparently. He then sold it to the current owner who I'm trading with.

One thing I find funny about the car, it has the vortech v2 sq (super quiet) blower, but it's far from quiet. You can hear it whining just at idle, and it screams when accelerating.

Edit: The car was originally running at about 16lb of boost and 505hp, but the belt would start slipping. He added a smaller carbon(?) coated pulley and different belts, and it's apparently now at a steady 21psi like he said. He claims he has seen it go up to 23psi on big pulls, only in first gear. It WAS dyno tuned, that's a relief. I'm not sure what to think about the 21psi deal, you guys sure that's not possible?

 

[GT Rob]

Sounds to good to be ture. If you have thoughts about it don't trade your good working car for somebody's headache. Jusy my 2cent welcome to the forum post pics of your g35

 

[Deblaca]

I would agree if I hadn't seen it in person. The car didn't idle rough, or have any kind of hiccups on the drive he gave me. Like I said he has receipts for everything, he sent me a few pictures of them earlier. I'm going to have a mechanic friend of mine check the car out thoroughly on Saturday, and if everything looks good, we'll most likely be trading that day.

Pics of the G:

 

[Wichers123]

When you get it, ditch the pulley, the supercharger can make the psi but its not efficient 18psi is max on that unit. My car right now is making 10psi at 5700, 13psi at 6000, and 15psi at 6500 all with a 3.6 stock pulley.

 

[Deblaca]

Will do. He's including everything he has for the car, which includes the old pulleys.

 

[justinschmidt1]

Little bit more info...

Front seats are corvette seats.

First owner did all the work, he owned how own performance shop. Second owner drove it very few miles, mostly to mustang events and get togethers apparently. He then sold it to the current owner who I'm trading with.

One thing I find funny about the car, it has the vortech v2 sq (super quiet) blower, but it's far from quiet. You can hear it whining just at idle, and it screams when accelerating.

Edit: The car was originally running at about 16lb of boost and 505hp, but the belt would start slipping. He added a smaller carbon(?) coated pulley and different belts, and it's apparently now at a steady 21psi like he said. He claims he has seen it go up to 23psi on big pulls, only in first gear. It WAS dyno tuned, that's a relief. I'm not sure what to think about the 21psi deal, you guys sure that's not possible?

There's no way in hell a v2 is producing 23 psi through thst motor ever and through a front mount and mods and possibly a 5.0 displacement?

He is smoking that good shit.

Ask him what size pulley is on it

 

[Wichers123]

There's no way in hell a v2 is producing 23 psi through thst motor ever and through a front mount and mods and possibly a 5.0 displacement?

He is smoking that good shit.

Ask him what size pulley is on it

Justin over spinning it can create that boost its really not that far off from 18. Centri's do work alittle like turbos as they are based on their design. Now the max rpm and psi ratings on the unit are what vortech says is efficient, anything over that is hot pressure, and burning up bearings.

and if you want to continue this please explain how I make 15psi at 6500rpms with a 3.6 stock vortech kit pulley. If I was to drop two pulley sizes I could easily build over 18psi. Right now all I have in the motor is svo intake, bbk lt's, and pi cams. I dropped the rpms down to 5700rpms to net me 10psi.

 

[Deblaca]

Yes it's a 5.0 w/ a Paxton air to air intercooler, but I'm not sure what the current pulley size is. I know it was 2.80 before and running at 15psi.

 

[justinschmidt1]

Justin over spinning it can create that boost its really not that far off from 18. Centri's do work alittle like turbos as they are based on their design. Now the max rpm and psi ratings on the unit are what vortech says is efficient, anything over that is hot pressure, and burning up bearings.

and if you want to continue this please explain how I make 15psi at 6500rpms with a 3.6 stock vortech kit pulley. If I was to drop two pulley sizes I could easily build over 18psi. Right now all I have in the motor is svo intake, bbk lt's, and pi cams. I dropped the rpms down to 5700rpms to net me 10psi.

A vortech looks like a turbo but it doesnt work like a turbo...like I said before, turbos are load dependent, a blower spins a set RPM based on engine RPM...they dont work like turbos at all, the similarities end at the similar snail design.

I understand what vortech does...I also understand that every motor has different flow requirements which you clearly do not understand if you think that rating is at all relevant. 10 psi in a 2.0L motor is not the same as 10 psi in a 5.0L motor. For example, that same blower vortech rates at 17 psi or w/e could make 30 psi through a 1.8L honda motor and struggle to make 10 psi through a LS7.

As far as you making 15 psi, well every setup is different, you dont have a front mount intercooler im assuming? You probably have the new V3 Si blower which ive seen produce quite a lot of boost in stock form.

Your setup isnt relevant to the OPs setup anyway....he just stated he made 15 psi with a 2.8 pulley so where in the world is the other 8 psi coming from?

You only pickup 1 psi per .1 inch typically...the smallest 8 rib vortech sells is a 2.7 and 6 rib they sell a 2.62, either way I dont see 21-23 psi.

Yes it's a 5.0 w/ a Paxton air to air intercooler, but I'm not sure what the current pulley size is. I know it was 2.80 before and running at 15psi.

See that makes perfect sense....but what doesnt make sense is where the extra 6-8 psi comes from when you're already running such a small pulley... smallest 6 rib is a 2.62 and 8 rib is 2.7 from vortech which would yield maybe 17 max with the 2.6 on your car.

And you would def be overspinning the blower with those.

 

[Deblaca]

We're meeting again on Saturday and if everything goes to plan trading. I'll make sure to switch back to the 2.80 pulley asap.

 

[justinschmidt1]

We're meeting again on Saturday and if everything goes to plan trading. I'll make sure to switch back to the 2.80 pulley asap.

You may not need to do that but you should try to figure out what pulley is on it and see how much boost its actually running.

Maybe his gauge is off?

Dyno machine will give you a reading.

Im just saying, I ran a v2 on my car for years and know plenty of guys with built motor setups running v2 s trims....with a mild setup the blowers seem to max out around 15-16 psi like yours was at the 2.8 pulley setup.

 

[Deblaca]

Yeah I'll ask him what the pulley size is, and if get it on a dyno asap. I really want to get to the bottom of this.

 

[justinschmidt1]

Yeah I'll ask him what the pulley size is, and if get it on a dyno asap. I really want to get to the bottom of this.

Where is he getting his reading? Just from eye balling a boost gauge? lol

 

[Deblaca]

Where is he getting his reading? Just from eye balling a boost gauge? lol

Yeah he's getting it from the boost gauge.

 

[Wichers123]

Psi is psi and cfms are cfm don't matter how it lays out. And no I have no intercooler and its a v2 s trim.

 

[justinschmidt1]

Psi is psi and cfms are cfm don't matter how it lays out. And no I have no intercooler and its a v2 s trim.

So let me get this straight, you think if you put your blower with a stock 3.6 pulley on his motor with his setup and intercooler he would see 15 psi at 6500 RPM?

You believe that 15 psi in his motor is the same as 15 psi in your motor and setup?


cfm is cfm....but PSI is not PSI.