Engines under forced induction

[Shteifen]

good points.

i agree, new engine are made very well, and deal well with forced induction probably because of the massive budgets these companies have to invest in research and development of components to that last.

in an older engine type, like a VR6, to make it ready for forced induction would a simple rebuild be enough? would all the bearings, pistons, rods, valves, guides and such of an engine rebuilt with stock components be enough to deal with different levels of boost?
i mean that engine was never meant to be boosted, so is a refresher all it needs to be suited for it? or are there specialised bearings parts that should be used for a forced induction engine compared to an NA motor?

-steve

[gareth_oau]

i would imagine any dealing directly with the power, ie valve sealing, pistons, rods, BE bearings etc would need to be redone.

clutch as well.

and while its in bits, get your head port/polished - a lot of gains can be realised from removing manufacturers tolerances

[Shteifen]

yeah, id be gettin everythin replaced. probably go for makin it a 3 litre as well

get head fully rebuilt along with the p&p. probably wont bother with bigger valves or anythin though.
bottom end rebuild as well, all crank and rod bearings and whatnot.

ah well, theres so much i could end up doin, just a matter of whether i can justify the work/money/time.

-steve

[GoLfMan]

Listen to Bug_Racer (Seb) he has ALOT of experience in hotting up the VR6! He's building a VR6t drag car at the moment I think? (correct me if I'm wrong Seb)

as he said, I personally wouldn't supercharge it, you wont gain enough to make it worthwhile and a low boost turbo set up will yeild more power

[gareth_oau]

if youre already getting the head rebuilt, then why not use bigger valves? I cant imagine the incremental cost being too prohibitive and if youre going to be using/producing a lot more gases, you'd want to get them in and out of the engine a lot quicker?

[Shteifen]

Thats true i suppose. haha might as well eh?

for that sort of work would be best to send the block and head to someone who has experience in these engines or will anyone do? I'd probably rather send it to someone who has had some experience, though i don't know if there would be many, so they'd be expensive i imagine.

the main reason i preferred supercharging over turbo is because all the videos ive seen, the turbo vr's never quite sound like a vr, where as the super charged ones do. the turbo ones sound almost muffled and pretty much the reason why i got this car was cos of the sound. and a little more power obviously.

-steve

[Jarred]

i'd go a blower if i was after big HP numbers, but seeing as though you don't seem to be after out right HP, whack a blower on!

i'd don't think you'll need to go overboard with the head work, but just cleaning up the factory tolerances & port matching is v.good.

any head guy worth his weight should be able to do it.

[Shteifen]

Exactly, i wouldnt be after massive numbers, cos i dont want to buy a new gear box every few months. it'd be my daily driver so i wouldnt want it to be undrivable. i'd be building it to last and the power delivery to be comfortable.
i dont see the point of getting to 2.9k rpm and having no traction in 1st, 2nd and 3rd...

i read somewhere that you get a choice of two of the following three :power, reliability and cheapness of build.
i choose the first two, rather than stay stock and buy another car in a couple years

did you mean you'd go a blower ( to me ablower is supercharger) if you werent looking for massive power? or by blower did you mean turbo?

-steve

[gareth_oau]

and the whine of a supercharger (blower) is sooo nice!! LOL

check out this whine!!

http://www.youtube.com/watch?v=FBkX8GS5FoY

[Shteifen]

thats EXACTLY what i mean too!
haha

-steve

[Jarred]

blower as in supercharger. huffer is a turbo.

that's what i call em any ways.

[Shteifen]

ah k.

yeah the sound is the reason i was thinkin blower, both because it keeps the vr sound and also cos of this whine of the charger. but then as previously stated, it uses power to make it which has always bothered me

turbo would be wicked though. i suppose a low boost setup sounds ok with a fully worked head and block. shouldnt get rid of the sound too much at low boost. then ofcourse there is the spooling noise which is always good. such hard decisions

-steve

[mk1turbo79]

If you go with a supercharger, would you use a vortech v9 or v2. If so they do not take huge HP to turn unlike a roots type charger. I read somewhere that it was only 5-10HP. The other benefit of a centrifical charger is you don't really have to build a super strong gearbox, because there is no huge spike in power or torque. The give a linear curve.

On the other hand turbo is better in my opinion.

[AusScare]

Is a supercharged setup cheaper than turbo for just the basic setup?

What dollar amounts are we talking for each, to make it stable.

[peedman]

Is a supercharged setup cheaper than turbo for just the basic setup?

What dollar amounts are we talking for each, to make it stable.

Well the vf engineering supercharger kit is $3500USD and the Kinetic turbo kit is $3150USD so price range is very similar. The difference is that vf make a kit specific for the non-us spec cars whereas the kinetic kit doesnt and that brings into question whether the software will work and whether the turbo manifold/down pipe fits (lhd vs rhd). In the end these kits only run 6psi and power would be pretty similar. Reliability shouldnt be of concern if u dont drive like a tard and do regular services. Dont forget this is without shipping so to get the kit sent here u would be wont be looking at getting much change from $5000AUD.