Proof that centrifugal S/C's generally suck

[AzCivic]

http://www.thirdgen.org/techbb2/show...hreadid=188202

Good article.

I agree with the resluts because the Centerfugal S/c makes power in relation to RPM and it does NOT become spooled since it is NOT a turbo - granted it builds power in a linear fassion, but if the RPMs drop the power drops with them, not like a turbo where it will stay spooled after you get it going.

[GT40FIED]

Centrifugals altogether aren't my cup of tea. I mean...why rev the hell out of your motor just to get the desired boost levels? They also put an undue amount of pressure on the crank snout without some serious consideration and aftermarket parts. Roots blowers aren't too great either unless they're intercooled (I don't think the Holley 174 the mentioned is) even though they provide good low end response. They're fairly inefficiect at compressing air, even compared to a Lysholm screw blower (I'd have liked to see one of those in that test) which are somewhat similar in design. Turbos are really only a good bet if they're intercooled since you're using hot exhaust gas to turn them...but even non-IC I'd still take a turbo over a centrifugal blower any day.

[ShagginJet]

TQ@2500------------------------------------360------------490---------440
TQ@3000------------------340-------------405------------500---------450
TQ@3500------------------355-------------450------------560---------475
TQ@4000------------------365-------------500------------610---------500
TQ@4500------------------380-------------525------------610---------505
TQ@5000------------------375-------------555------------600---------505
TQ@5500------------------355-------------555------------560---------485
TQ@6000------------------354-------------540------------530---------475

HP@2500------------------------------------170------------235---------210
HP@3000------------------190-------------235------------290---------250
HP@3500------------------240-------------300------------375---------325
HP@4000------------------275-------------375------------455---------375
HP@4500------------------325-------------450------------525---------445
HP@5000------------------360-------------525------------575---------485
HP@5500------------------380-------------575------------600---------510
HP@6000------------------395-------------617------------600---------535



^^Look at the numbers, the turbo post higher number everywhere except the HP & TQ @ 6000RPM, and it has more torque.

[AzCivic]

its easier to see with this:

[V8killimports]

Well let's be fair though. The Novi 1200 is junk. Try the test again with a ATI Procharger D or F series and it would be a little more fair.

Same with the roots blower.. that 174 barely qualifies as a blower. Try the test again with a 671. Not saying that the turbo would still win, but they stacked the turbo against the S/Cs.

And as for the title of the thread...

2400hp cent powered camaro owns joo.

[V8killimports]

BTW GT.. do you have pics of your setup? I always wondered how V8 guys did a turbo setup.. I have lots of room in my engine compartment from the flange up.. but anything below then is tight. Just to fit my headers on now (the only ones that even came close to fitting) I had to modify clutch linkage, a control arm, steering box, pitman arm, tierod end, and dimple the header itself (all on the driver side header) to make it fit.

I don't even know what tis stuff is...elaborate...

[GT40FIED]

Originally posted by V8killimports
Well let's be fair though. The Novi 1200 is junk. Try the test again with a ATI Procharger D or F series and it would be a little more fair.

Same with the roots blower.. that 174 barely qualifies as a blower. Try the test again with a 671. Not saying that the turbo would still win, but they stacked the turbo against the S/Cs.

This is also true...I'd like to see the test with a Novi 2000 (pretty much the standard street Paxton unit) or a Procharger P1-SC or D series. Same with the Holey blower...c'mon...it's Holley. They should stick to making carbs. That's really all they're good for. I didn't note the turbo size so I don't know if it's a fair run, but I still think the turbo would edge out a comparable blower...especially in the torque dept.

Sorry V8...no pics yet. Maybe when I stop throwing money into my car and drop some cash on a digital camera. Basically what I did was take a regular header, flip it upside down and elongate the bolt holes a bit on either end. This puts the turbo up in the engine bay instead of down by the oil pan. Have a shop do some cutsom piping and you're good to go. It works a ton better with a real turbo header...but once again money is an issue.

[V8killimports]

The P1SC is VERY entry level too.. I would do a D at least. Also.. holley is now weiand so that is actually a weiand blower.. or the same thing now..

And a header would NEVER fit upside down.. it barely fits rightside up.

[thermal]

ha ha ha.... I wont even jump into this shit. The only force induction I will ever do is turbocharger....nuff said

[GT40FIED]

Originally posted by V8killimports
The P1SC is VERY entry level too.. I would do a D at least. Also.. holley is now weiand so that is actually a weiand blower.. or the same thing now..

And a header would NEVER fit upside down.. it barely fits rightside up.

Actually since the release of the P1-SC, the P600B has become the entry level kit (I interned with ATI last summer). That said the P1-SC is still a great street blower...it just won't move as much as a D series. I like the P1 for the street though since it's got a pretty fast step-up in the transmission (4.33, I believe). D series stuff is serious street/strip. Anything past a D1 and you're pretty much heading to the track. Yeah...Holley didn't just buy up Weiand...it bought up everyone who isn't owned by either Scummit or Mr. Gasket. Greedy bastards. I'd buy a BDS 6-71 before I'd take the 174 for free. But still...turbos 0wn jo0 (hey...those are thermal's words...not mine ).

[V8killimports]

Originally posted by GT40FIED
Actually since the release of the P1-SC, the P600B has become the entry level kit (I interned with ATI last summer). That said the P1-SC is still a great street blower...it just won't move as much as a D series. I like the P1 for the street though since it's got a pretty fast step-up in the transmission (4.33, I believe). D series stuff is serious street/strip. Anything past a D1 and you're pretty much heading to the track. Yeah...Holley didn't just buy up Weiand...it bought up everyone who isn't owned by either Scummit or Mr. Gasket. Greedy bastards. I'd buy a BDS 6-71 before I'd take the 174 for free. But still...turbos 0wn jo0 (hey...those are thermal's words...not mine ).

Yea you're right.. i forgot about the 600. And I am leaning towards the F series =/ Have to redo some things oon my motor, but hopefully run an intercooler with about 12-14psi.. and should get hopefully about 900hp

Originally posted by thermalfi'd16
ha ha ha.... I wont even jump into this shit. The only force induction I will ever do is turbocharger....nuff said

all torque, no belts or pullies, that's my cup of tea