age old debate!!! forced induction!

[st-evo-9*corn fed-8urvet*]

what poison do u prefer? and y?
naturally aspirated
supercharged *roots or centrifugal*
or
turbo charged *maybe even explain what family and size of turbo*

what do u like? y did u pick what u picked? what would u prefer for ur car?

and what are ur reasons for not picking the other 2 choices? now discuss

[SeanPlunk]

If I had an unlimited budget I'd build a forged LSx variant turbocharged motor. You just can't beat the combination of power and street manners that a modern turbocharged engine produces.

[enkeivette]

As far as aftermarket performance, I'm going to have to go with centrifugal superchargers. Surprise surprise. You've got the ease of installation, minus the heat of a roots, and you have the option of intercooling. Plus! No lag, instant power. The liquid intercoolers on the roots blowers aren't readily available/ cost effective for aftermarket performance.

Although! If the car was equipped with a turbo from the factory making installation of a larger turbo much easier, than I would opt to go with an intercooled turbo setup. Less loss than a centrifugal supercharger, and a cooler BOV noise! :D

If install difficulty was not a factor, on any motor, I would go with an intercooled turbo.

[st-evo-9*corn fed-8urvet*]

As far as aftermarket performance, I'm going to have to go with centrifugal superchargers. Surprise surprise. You've got the ease of installation, minus the heat of a roots, and you have the option of intercooling. Plus! No lag, instant power. The liquid intercoolers on the roots blowers aren't readily available/ cost effective for aftermarket performance.

Although! If the car was equipped with a turbo from the factory making installation of a larger turbo much easier, than I would opt to go with an intercooled turbo setup. Less loss than a centrifugal supercharger, and a cooler BOV noise! :D

If install difficulty was not a factor, on any motor, I would go with an intercooled turbo.

now u see how i feel!!! its all about the BOV lol! but u gotta be careful with that statement not all stock turbo motors are built the same!! IE skyline/evo/supra engine compared to say a VW gti, or starion or volvo engine lol the later will cause u much more stress :-(

[Vettezuki]

For me there's nothing like the crack response of a hi strung NA motor. They'll also run hard continuously longer than most FI setups, which (unless they are properly built) will run into all kinds of heat issues regardless. Ask Sean about heat sink on his blower. I have no such problems and can hot lap on a hot day; he'll lose tenths.

That being said, I think a dream motor for my vette would be a Kenne Bell 2.3 Twin Screw, 15psi, on a 383 stroker. That outta gett'r done.

[heypal]

turbo always have love turbos. Love how the sound when spooling up love the power curve just all in all fun. Thats why i went turbo instead of supercharged on my Impala.

When racing a turbo car turbo lag gives you a second to reflect about the poor decision you have just made to race it. :)

[st-evo-9*corn fed-8urvet*]

turbo always have love turbos. Love how the sound when spooling up love the power curve just all in all fun. Thats why i went turbo instead of supercharged on my Impala.

When racing a turbo car turbo lag gives you a second to reflect about the poor decision you have just made to race it. :)

lol i love ur response! but if u ever didnt want to give then time to reflect on there poor decision u can always anti-lag ur turbo system and spool up like a u have a baby turbo but still get all the power ur big ol turbo promised :p

[enkeivette]

now u see how i feel!!! its all about the BOV lol! but u gotta be careful with that statement not all stock turbo motors are built the same!! IE skyline/evo/supra engine compared to say a VW gti, or starion or volvo engine lol the later will cause u much more stress :-(

I can imagine, even my mom's SRT4 is awful. The turbo is wedged between the motor and the firewall and it took me an hour just to install a BOV! It was one of the situations where you can't fit a ratcheting wrench in there but you desperatley need to.

[BRUTAL64]

Roots fan. Yea, I know but still a fan.:p

[94cobra69ss396]

I like the centrifugal on my Cobra. So much so that's what I'm going to do with the Chevelle for the next engine.

[Vettezuki]

I like the centrifugal on my Cobra. So much so that's what I'm going to do with the Chevelle for the next engine.

How does it behave down low on the Cobra? One reason why Like the roots/twin screw is because of the low rev torque you get right away. The thing I like about NA motors is the (hopefully) linear power band; not such a big fan of peaky power bands.

[94cobra69ss396]

The Cobra pretty much feels the same as before I had the Vortech. I did notice with my new clutch (Spec Stage 3+) that it's easy to stall the car when taking off. The Spec doesn't slip that much it just grabs. Most people who try to drive my car (car washes, oil shops, etc.) stall it.

I broke the supercharger belt not to long ago and had to wait a couple days for a new one. While driving those two days the thottle response when taking of was much better which shows how much the blower is pulling from the engine. I guess it's kind of like having turbo lag only not to the same extent.

[Vettezuki]

. . .
I broke the supercharger belt not to long ago and had to wait a couple days for a new one. While driving those two days the thottle response when taking of was much better which shows how much the blower is pulling from the engine. I guess it's kind of like having turbo lag only not to the same extent.

That's what I'm talking about. I'd ultimately like to Road Race the Vette a little, and that's where the NA shines. Snap response, linear powerband, doesn't have the same heat problems. And these days, it's not all that hard to get beyond 500BHP on a mid displacement NA motor, which except for drag racing and high speed runs, is big plenty. :smack: Like I said, though, I wouldn't turn down a Kenne Bell if someone wanted to give me one. . . Anyone? Anyone? :judge:

[Sonic03SVT]

You know, while I am aware of all the limitations and downsides to it, there is something to be said for these roots/twinscrew blowers...damn its fun having a lil ol 4.6 that feels like a big block down low. And if you set up the blower differently its still fantastic at high revs too (top fuel? - the original cobra development motor that made 450hp at 6200 rpms? ) That being said...I think id rather have a turbo...of course....why choose just one?
http://i272.photobucket.com/albums/jj200/Blue_03_SVT/sema_07_tu_DSC_9398.jpg
http://i272.photobucket.com/albums/jj200/Blue_03_SVT/Twin_graph_circle.jpg

[Vettezuki]

I don't know if it's in production, but VW was working on a small displacement that was a combo of a SC and TC; SC in the low revs, then bypass and switch to TC.

I'm curious about the motor I think Mitsubishi is working on that's a combo of a hi-compression N/A motor and low-compression Turbo motor. That's right, variable compression using linkages in the rods to change their length. The idea is under lower loads the engine would run higher compression NA because it is inherently more thermoally effecient, and boosted lower compression under load conditions.