Podium

Looking at going blower over the winter. I drove a few procharger cars this weekend (Mustangs) and wasnt all that impressed with the way the car made power. One was builf and one was stock with boltons. They didnt make boost until 4k or so. Both cars came alive at 5k but had to shift by 6k. I didnt think this was that impressive, although they were fast. I dont want to spend a ton of money and the car doesnt get its power until 4k. My car is a 90 percent street car so gaining power before 4k is important.

How do the ls motors react with centrifugal blowers? I guess my fear is not getting the power until 4k and having to rev it out to experience it.

regorih

You can make boost as soon as you go wot regardless of what rpm you're in. If you want to make good power and feel it hit hard you need to put a small pulley to make the blower come alive in the lower rpms. Pro chargers make linear power so more rpms your turn, the more boost you'll make. Most people run too big of a pulley which makes the car lazy. Also noticed when people get engines build for boost they build them for lower compression than stock and complain how it's lazier afterwards. So in conclusion run stock compression and turn that blower hard as fukc!

stevieturbo

If they're having to shift before 6k, something is badly wrong either with their build, setup, or driving.

A centri may not start to see significant positive pressure until 3, 4k or so...but dont think for one second they are not moving air prior to that and offer improvements over that same engine n/a

But if you want low rpm torque and power all up before 4k, then no a centri is not for you.

You either want a large capacity motor and/or a twin screw or Rootes type blower.

It's all about building the right package for you.

A turbo setup could work too, but you'd be needing very small turbos and for the expense, it might be hard to justify vs a blower.

romandian

novi 1500sl on 99 c5 a4, 97 kpa ambient, "stock" 3.48 pulley

2800 rpm 115 kpa
3200 125
3600 132
4000 140
4400 150
5000 165
5600 179
6000 192
6300 200

the beauty of the centri is that you can put the power to the ground, except in first. on a turbo motor boost woud be all in by 4000, spin the tires and nothing much below that. of course with a 4 speed its hard to stay in the power band.

directnosfogger

3.25 pulley on a p1.

helga203

Lol 1500rpm i'm around 3,4 psi boost already.

stevieturbo

Centrifugal ?

Podium

They shift at 6k because that's the power band. These were fox 5.0s, not the new coyote.

I'm just worried about it being lazy until 4k. My plan is to add a blower cam and a ecs unit. I already have the other bolt ons. There is forum member that lives close to me with a cammed, centri set up that is going to take me for a spin so I can get a real taste of it. Centri seems most logical for my goal of 600 to 650 rwhp

helga203

F2 Pullied for max boost at 6500rpm. I bury the 3bar map at 305kpa by 6400rpm.

stevieturbo

If you mostly drive below 4k and want the power there, then absolutely no, a centri is not logical.

And comparing a totally different car/engine....is pointless.

For a goal of 650, there are many options and yes a centri would be a good one. But that only covers one part of your requested goals.

But as with everything, not all engines are equal, not all blowers are equal, not all centri's are equal.....but I'm sure if you get a drive in something with similar power it will feel good.

neverstop

my 3.55" pulley'd D1SC makes 900whp and nutty torque. 860tq at the wheels which is a lot to me.

at 3250 rpm I'm already making 600tq at the wheels and at 4000rpm making almost 750tq at the wheels

remember a centri is more efficient so it will make more hp/tq per psi of boost relative to a PD blower like heartbeat etc

just pulley the centri down to whatever power/boost level you want.

silver408z

I used to not be a centi fan but then found some people who set them up right and it was a huge difference. A lot of people just put a basic kit. They end up making ok numbers but it feels lazy. If you have well setup combo and aggressive with the pulleys its completely different.

Podium

Not really between the motors, just how the centri works. So far not a fan for a daily driver.

Hopefully going for the ride soon. Im not going to do a positive displacement style as I dont like any of the aftermarket hoods for C5s.

If the ride doesnt convince me I will probably build a stroker.

stevieturbo

You cannot compare an old 5.0 Ford to an LS in any shape or form.

Anyone who tells you it is because of the centri it cannot rev past 6k, hit them a good slap around the face.

blackzo6

That how my car feels. I have a 03z, 6spd with the A&A blkout 3.8 pulley and cam. It makes 10 psi and 620 whp. I think its good being able to drive around normal (under 3000rpm) and not be in boost. When you are racing you are always in the higher rpms anyways, right? Gearing plays a part too. You should get a 2300 if you want instant torque.

Podium

Then I have to get an ugly hood

stevieturbo

I'm sure with the likes of a heartbeat, LSA or whatever you could probably get a custom made hood that is more subtle than some of the huge bulge ones.

hatewhatownsyou

My car wakes up around 3500 bu I can start making boost around 1500.

420tq @3500rpm
625tq @5800rpm

10psi


Definitely comes on like a switch tho, and unless you get on it, it won't even get into boost