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Maybe a switch from Vortech to Kenne Bell

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Discussion starter · #41 ·
Yeah I never put modding the car over priorities I have. That is the reason I save seperate money for the car. I don't even necessarily want more power I was just considering something different. I figured I need a daily driver more than another supercharger, but the car I plan on buying from a friend is no slouch.
 
#42 ·
i'd definitely do it for the vanity factor, twin screws look a whole heap sexier than centrifugals. Moreover, even if it won't add numbers to the dyno I'm pretty damn sure you'd feel the difference in the torque delivered earlier in the rpms and generally a wider powerband. I mean haven't you seen twin screw dyno charts? It's got that golden table top shape as opposed to the sudden sloping line
 
#43 · (Edited)
PsyAbe said:
i'd definitely do it for the vanity factor, twin screws look a whole heap sexier than centrifugals. Moreover, even if it won't add numbers to the dyno I'm pretty damn sure you'd feel the difference in the torque delivered earlier in the rpms and generally a wider powerband. I mean haven't you seen twin screw dyno charts? It's got that golden table top shape as opposed to the sudden sloping line
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A sudden sloping line that keeps growing and growing until I let out.

But I will agree that a centri is laggier than a PD or properly sized and tuned turbo. But shifting gears solves that plus it's more efficent than the PD but less than the turbo. It also depends on the set up. When I was at 598/531 Considring it was a Centi mine was pretty flat.

Before any one gives me crap about the afr its what the tailpipe sniffer read not the o2 that was in my X-pipe. The o2 in the pipe was used for tuning.

I also don't know why the the tuner waited until 3200 rpm to flat foot it is beyond me?

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Discussion starter · #44 ·
Lol I was going to say, what did he do? Looks like he sprayed a really small shot for a second to start you out.

But, no I'm not switching, I am just going to keep what I have for now. It would be fun, but honestly makes no sense to do it. Quick daily driver is coming my way instead.
 
#45 ·
When I run my car I never get bellow 3500rpms form the launch to the finish. So whats the use of having lots of torque in the low rpms? Thats the beauty of the transmission and the rear end, they are made so you can have torque anytime you want it. I have seen a lot of pd dyno graphs that start dropping power power at high rpms.
 
#46 ·
bullitt1680 said:
Lol I was going to say, what did he do? Looks like he sprayed a really small shot for a second to start you out.

But, no I'm not switching, I am just going to keep what I have for now. It would be fun, but honestly makes no sense to do it. Quick daily driver is coming my way instead.
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A shot of what? Good intentions lol. I have never ran nitrous. I do it on boost alone. That was a little V1 S-trim. We had to back out the timing and limit rpm because of a fuel issue. You won't see a KB 2.1 or 2.2 putting out those types of numbers at 17psi on a 2v 4.6l and pump gas at 16* of total timing.

Don Losota Did that tune he said it had around 610 in it that day but he was scared to add more timing when it was trying to lean out. Turned out to be a Cobra fuel pump failing.
 
Discussion starter · #47 ·
Yeah I was talking about the point where he put it to the floor. It looks like it jumped the same way a nitrous dyno graph does. I know you don't spray, I was just saying it was sort of similar.
 
#48 ·
You should stay with the Vortech!!!! I to am in your boat I got bored of my vortech within two months, but I have decided to rebuild my engine with a 1000HP rotating assembly from MMR. There will be some serious power soon!! Stay with it, just take it to the next level!!
 
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#49 ·
^agreed and this forum is not just a pro-"centri forum" like stated above by someone. Stick with the centri and build that motor!
 
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#51 · (Edited)
stal94gt said:
The reason alot of centri guys get bored of the setup is the power. 400 hp is not alot of power. It does not matter if it comes out of a pd blower or a centri.
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Exactly power is power. I would just perfer a TT set up because it uses a lot less power to make power. If I had a TT set up peak boost would come on sooner and I would make more hp per lb of boost. I could see me breaking 700 at the same boost level. No belt slip etc. To bad it costs so F'ing much.

The Vortech S-trim allowed me to grow a little at a time. I can even put a YSI-trim on the very same bracket. You can just change out the head unit in a hours time. I have just about everything else. Only Vortech allows you go from mild to wild so cheaply and effortlessly. Even the weakest SC Vortech makes for our cars the V1 S-trim can support 600+ rwhp.
 
#52 ·
I went from a V2 stock longblock, to a 2.8 KB with a forged engine. I used to hate waiting for boost to build with the V2. As others have stated turbo is most efficient, centri next, PD is the least efficient.

The feel of a PD is certainly different than a centri.
 
#53 ·
jivepepper said:
Exactly power is power. I would just perfer a TT set up because it uses a lot less power to make power. If I had a TT set up peak boost would come on sooner and I would make more hp per lb of boost. I could see me breaking 700 at the same boost level. No belt slip etc. To bad it costs so F'ing much.

The Vortech S-trim allowed me to grow a little at a time. I can even put a YSI-trim on the very same bracket. You can just change out the head unit in a hours time. I have just about everything else. Only Vortech allows you go from mild to wild so cheaply and effortlessly. Even the weakest SC Vortech makes for our cars the V1 S-trim can support 600+ rwhp.
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And that is why im going with vortech this winter, actually im looking for any type of centri blower at the moment but I would really like to go with vortech just cause it's so versatile.
 
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#54 ·
ytngt said:
I went from a V2 stock longblock, to a 2.8 KB with a forged engine. I used to hate waiting for boost to build with the V2. As others have stated turbo is most efficient, centri next, PD is the least efficient.

The feel of a PD is certainly different than a centri.
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You don't experience the lag very much when overspining the S-trim since it's small and it seems to love it lol. At 600 whp the the head unit is spinning so fast it almost feels like a pd or twin screw. Centrifuge SC's only feel laggy at lower boost levels and since the power is so smooth and linear it's hard to tell your making that much extra hp. That's why I always wanted to run a 30lb pulley on a YSI trim along with waste gate set at 24 lbs. The boost would get to peak way before redline and hold that to the end? Then you could have a race tune raise the boost 28lbs and let it rip. That's the best at both worlds as far as SC's are maybe concerned. Efficient power from one end of the RPM range to the other.

But then again you can do it easier and better with a turbo so why bother lol? My decisions are very much financial based. How can I make good reliable power for the least amount possible.

I remember picking up my friends Whippled 03 Cobra up right after it was tuned making around 600rwhp and at the time I was around 430. Man I was impressed when we test drove it. I could not believe how hard it pullied me back in my seat. My car now feels a little slower low but a good bit stronger up top. He only ran it once and did a 11.1 at 130 and broke a half shalf.
 
#57 · (Edited)
stal94gt said:
V3 si trim. Self contained, cheap, capable of pushing 20# of boost not over spinning it. 3.6 pulley makes 10# non ic. With a cx 4 core a 3.33 pushed 10#. 3.0 and the same cx 4 core made 18# in the summer and 20# winter at 6250 rpms.
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I think the self contained is convenient but The YSI and T-trim and Vortechs race blowers are still oil tapped for a reason? You would have to figure the CFM needed for a given engine before you could tell if you would need to overspin the SC to make 20 psi. It's not a static number or amount.

I have a huge duration cam, ported heads with oversized valves, TFS intake with the oval upper, sporting Accufabs special single blade oval TB that flows 1750 CFM. My pipe shortly after the ic goes to 4" them 4.5 right before the TB. I also have LT's and a full 3" exhaust. I have a large volume of space to fill before it even starts building boost.

Now don't get me wrong I think the Si is a step up but mainly because of the impeller now being billet. An idea that Vortech toke from 928 Motorsports. It's a Porsche tuning company that started making billet impellers for the S-trim that aloud you to efficiently overspin the blower. The impeller is what limited the SC.

I asked about this with Vortech and 928 a few years back and when the Vortech asked me about it he suddenly offered me a super deal on a T-trim upgraded. Which by the end I received a brand new HD T-trim for the price of the basic upgrade. Now Vortech does the same thing and adds the convenience of self contained and calls it a Si trim.

I have contacted 928 about do the same thing for the T-trim but I haven't heard back lol.

You install this in your S-trim it will produce about same as a Si-trim.

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#58 ·
I am biased when it comes to boost... i have driven a nitrous 4.6 a centri 4.6, a turbo 4.6, and a pd 4.6. and raced all of them.... the funnest by far was the turbo. It was very violent and a handful... granted, that car went 9s in the form that i drove it in. but my centri car i had last was an all around STOUT car... I raced my buddies 512rwhp termi from a dig, a 10 roll, a 20 roll, and a 40 roll and he NEVER was in front... my centri car was in its power all the time and i loved it... here is a vid of my last car. I was just getting a sound clip for someone about the exhaust. This was before it was tuned and i was not anywhere near full throttle.. but you can hear that as soon as i mashed the gas, there was no kind of lag at all.... VID00017-20101024-1957.mp4 video by mystang1019 - Photobucket
 
#60 ·
mystang0673 said:
I am biased when it comes to boost... i have driven a nitrous 4.6 a centri 4.6, a turbo 4.6, and a pd 4.6. and raced all of them.... the funnest by far was the turbo. It was very violent and a handful... granted, that car went 9s in the form that i drove it in. but my centri car i had last was an all around STOUT car... I raced my buddies 512rwhp termi from a dig, a 10 roll, a 20 roll, and a 40 roll and he NEVER was in front... my centri car was in its power all the time and i loved it... here is a vid of my last car. I was just getting a sound clip for someone about the exhaust. This was before it was tuned and i was not anywhere near full throttle.. but you can hear that as soon as i mashed the gas, there was no kind of lag at all.... VID00017-20101024-1957.mp4 video by mystang1019 - Photobucket
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Curious, what numbers were you making with the centri and what type was it?
 
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maverick2000
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