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Vortech build

svtfixer said:
as far as the impeller upgrade, its tempting but i doubt its a massive gain or any gain.
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10 to 15% more air across the entire rev range and without over speeding the bearings/impeller.

For the money, i'd be hoping it was better than a pulley upgrade and no belt slip issues.

I'd think about it if i was going from 2.5L to 3.0L with same head unit .... G.
 
not worth it for me. my impeller aint broke.

i dont think i had belt slip issues with the smaller pulleys. i did play with a bigger idler and spacing on the idlers to make up for the surface area loss.
 
so if one was already running the smallest pulley, short of custom making a pulley this is the only option out there for more power?
 
svtfixer said:
not worth it for me. my impeller aint broke. .
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yeah at $500 most guys would do it then.


svtfixer said:
i dont think i had belt slip issues with the smaller pulleys. i did play with a bigger idler and spacing on the idlers to make up for the surface area loss.
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Makes sense, smaller pulley, larger idler, same belt length and no tensioner adjustment range issues. Was it successful ? is all this in a thread ? ..... G.
 
jaged said:
so if one was already running the smallest pulley, short of custom making a pulley this is the only option out there for more power?
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You can buy 6 rib pulleys that are much smaller than the smallest vortech sells, i believe the issue is the unit gets maxed out already.

I would get a whole new unit all together, personally. Find a g trim v9. It's 600$ for impeller & machining + shipping. stuffing a larger impeller into the same unit. You won't get as much as a actual g trim blower. Smaller inlet and outlet then a real g trim. ••••, you can probably find a g trim for 600$

Assuming it fits...
 
Beans said:
I would get a whole new unit all together, personally. Find a g trim v9. It's 600$ for impeller & machining + shipping. stuffing a larger impeller into the same unit. You won't get as much as a actual g trim blower. Smaller inlet and outlet then a real g trim. ••••, you can probably find a g trim for 600$

Assuming it fits...
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I didn't know the impeller was larger, i thought it just had more long vanes.

If it is larger, wouldn't you just change the volute ? .... G.
 
Not sure if it's larger honestly, i assuming with the housing getting machined it would be. I wouldn't bother doing business with that supercharger rebuild place anyway, guy is a prick especially after giving him as much money as i did.
 
Beans said:
Not sure if it's larger honestly, i assuming with the housing getting machined it would be. I wouldn't bother doing business with that supercharger rebuild place anyway, guy is a prick especially after giving him as much money as i did.
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on their website it says all products are experimental and no refunds or returns.

Considering that, i'm not surprised you got no joy from them.

What did he say ? ... G.
 
never published any of my experiments. what probably lead to the blowers seal failure was running the 2.78 pulley at 11+ psi. there are probably smaller pulleys out there but then you are definately going to have slippage issues, tension issues etc and you are near 100 % of the blowers duty and are more likely accelerating the bearing wear. i read you should be at about 80% of the blowers potential. the v9-f are capabable of 13.5 psi so 10, 11? i had 11 briefly and seals didnt last long.

the 2.78 was 3 sizes down from the stock 3.33 which was at 6 psi and each size down is 1-2 psi at 10-20 hp.


i did find slippage was more of a surface area thing than anything so i increased the diameter of the idler and relocated it to wrap around the sc pulley better. i drilled holes in an elipticalish pattern into the plate about an inch apart, something like youd see on the machines at the gym to adjust it since its not adjustable as is and probably should be.

that larger impeller would give you more air at lower blower rpms if that actually works right. hard to measure slippage the sc itself needs a tach.

also needs multiple pressure gauges. always wanted to get one immediately out of the sc to see what its putting out and whats being lost along the way.
 
thanks for typing all that out.... very useful info.

svtfixer said:
the 2.78 was 3 sizes down from the stock 3.33 which was at 6 psi and each size down is 1-2 psi at 10-20 hp.
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is that 6 psi on a 3.0L or/and a 2.5L with a 3.33 ?

i'm assuming it is a 3.0L because of your sig, but i could use confirmation for when i do a 3.0L myself .... thanks ...G.
 
actually was on the 2.5 like it was originally intended for. theres a pressure drop with the front mount too, allegedly a pound or 2 and again with the 3l. the 3l ended up having 6-7 and thats when i started searching for answers. it cant be that much. its like 4-5 pound difference. if thats the case, theres probably a better headunit for that application. the v9's are gone off their line i think anyways. have to do some digging as to what replaced it or what the modern equivalent would be.
 
wow; that is a heads up.

i think from what you've said, ideally a larger head unit would be the way to go if you want 11 psi at an efficient/stock level.

Looks like those upgraded impellers might get you to 10 psi on a 3.0L with a 2.87 pulley.

Hoping Beans says what went on with his supplier before i think about buying an uprated impeller from them .... G.
 
i didnt really even think of internal upgrades on it. tried every damn pulley possible but reading more now, the blower was maxed out.
 
to be an all the way jackass, i have the counter clockwise unit that mounts on the pulley side of the motor also, dual charger action has always been on my mind.
 
then im already at the max of the unit, when it was tuned the guy said that it was maxing out at 13 lbs
 
in theory, but really is it ever enough? i just need to figure out how to drive it properly now. i about got it last season but there are some things that i need to change in my driving style on course to make it work properly, but thats for another thread
 
3.0 20 over, forged internals, ground cams, and the smallest pulley vortech listed, 2.56 i think. I have a boost gauge that was plumbed into the air to water that beans just bought. i was never able to really watch the gauge because i was going way too fast to pay attention
 
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