De-Supercharging L67 and manualising ?!?!?!

[VTspec2]

hey guys ,

first time poster, i have searched the net and these glorious forums =) , i wish to enquire about de-supercharging my VT2 Calais, ( sounds dumb but more fun in manual obviously ), so, im thinkin i need intake manifold, fuel rails and probably memcal re-tune, ( of course, gearbox and clutch etc ) but i wanna know why no-one has done as this motor is so strong and allows a perfect platform for a raptor type centrifugal charger to be attached (later). But for something i think is a great idea there is no info...
if you need a reason i put a 'stealth' CAI on the car and it nearly doubled my fuel consumption normally 12.6 ish it jumped to 17.3ish with no spirited driving.... CRAZY!!! but autos are still no fun....Sooooo a common solution is to manualise and de-charge..... what do you think .....

dont be too harsh !!! haha

Paul

[nemesis_adrasteia]

swap it out for an ecotec.

or sell the car and buy one with a manual and NA V6

[VK SL 3800]

Well this sounds like the most stupid idea ive heard for a V6, the original supercharger is far better then an aftermarket one so i have no idea what your thinking, change intake manifold and a retune then it will run errrr terrifically......

[wana s' charge stock vt]

why no-one has done it?????? lol cause its a dumb idea :P

just put a manual on it as it is now,(with the m90 blower on it) few people done it,
they just dont last forever but, should be ok if ya dont go mad on mod's....

[drift-it]

side mount will run higher numbers on a dyno with "less effort" but an l67 will smoke it! and if your fuel consumption had jumped all of a sudden then oxy sensors or something along the lines might be stuffed.

my l67 averages 18l/100 and is twice as fast as the vt...my vt ecotec averaged 16l/100

i know what id choose!

[wana s' charge stock vt]

and ya sure ya didnt ### something up installing the cai??? it shouldnt double ya fuel....

[ToMMMaY]

People wouldn't waste there time with a raptor they would keep the m90 or just turbo it I have done both ways kept the l67heads and welsh plugged the injector holes on the ecotec inlet manilfold then just done the top end to ecotec to tidy it all up

[HoZy]

[hakhawk]

hey guys ,

first time poster, i have searched the net and these glorious forums =) , i wish to enquire about de-supercharging my VT2 Calais, ( sounds dumb but more fun in manual obviously ), so, im thinkin i need intake manifold, fuel rails and probably memcal re-tune, ( of course, gearbox and clutch etc ) but i wanna know why no-one has done as this motor is so strong and allows a perfect platform for a raptor type centrifugal charger to be attached (later). But for something i think is a great idea there is no info...
if you need a reason i put a 'stealth' CAI on the car and it nearly doubled my fuel consumption normally 12.6 ish it jumped to 17.3ish with no spirited driving.... CRAZY!!! but autos are still no fun....Sooooo a common solution is to manualise and de-charge..... what do you think .....

dont be too harsh !!! haha

Paul

the guys that turbo l67s take the front housing and rotors out of the charger and replace it with a block off plate, leaving the throttlebody and such fully functional.

putting a n/a manifold on will require blocking the injector holes in the head.

[VTspec2]

well well well , uninformed would guess at that wouldn't they? i wouldnt put a bloody weak as piss t5 in it, it would be tremec 6 speed conversion ( obviously the only thing to handle torque ) , how dumb do you think iam to break something doing a CAI install mate?? seriously i have owned 3 of these cars before!!! the reason for this is it has unrestricted flow and eats every bit it can and the poor computer has to compensate.... anyway, other 'CONSTRUCTIVE" feedback plz, the eaton unit is un-efficient and boring, dont want another ecotec as its not nearly as built as this block is, and im not leaving it alone after this is done it just seems like a much better platform that a busted as$ ecotec like 92% of commo owners out there, but ITS SOMETHING DIFFERENT and you ppl seem to be afraid of this.... neva know if ya neva try ...

[VTspec2]

thanks hakhawk !! i agree, modifications would need to be implemented, but a great v6 base none-the less!!! {to others} i wasnt saying 'raptor' is my choice but 'aftermarket' perhaps is a better suited word..

[drift-it]

different??? compound charge > side mount supercharge feeding the m90?

[HoZy]

well well well , uninformed would guess at that wouldn't they? i wouldnt put a bloody weak as piss t5 in it, it would be tremec 6 speed conversion ( obviously the only thing to handle torque ) , how dumb do you think iam to break something doing a CAI install mate?? seriously i have owned 3 of these cars before!!! the reason for this is it has unrestricted flow and eats every bit it can and the poor computer has to compensate.... anyway, other 'CONSTRUCTIVE" feedback plz, the eaton unit is un-efficient and boring, dont want another ecotec as its not nearly as built as this block is, and im not leaving it alone after this is done it just seems like a much better platform that a busted as$ ecotec like 92% of commo owners out there, but ITS SOMETHING DIFFERENT and you ppl seem to be afraid of this.... neva know if ya neva try ...

Quoted for future lolz...

Just so you know a positive displacement supercharger is more efficient than a centrifugal supercharger...

The centrifugal will feel more "Peaky" due to the way it offers it's boost delivery.
But the Positive displacement aka fixed displacement blower will be a better option.
An if you do not like the m90, Upgrade to a M112 Blower or something..

But I'll leave this thread up to you, Thinking your V6 needs a Tremec 6speed conversion...

Anyway...

P.S- Replace your oxy sensors...

[one_and_only2004]

I think your argument is that you'd have a decompressed motor which would happily run more boost with a raptor instead of the 10psi it does now. The problem is that the highest boost a raptor can do is 12psi (which voids your warranty) and anything more than that will push it to the point of disintegration. I had mine running 14psi for 2 days and killed it.
Why wouldn't you just put a manual box behind the motor and leave it with the top mount blower?

[wana s' charge stock vt]

well well well , uninformed would guess at that wouldn't they? i wouldnt put a bloody weak as piss t5 in it, it would be tremec 6 speed conversion ( obviously the only thing to handle torque ) , how dumb do you think iam to break something doing a CAI install mate?? seriously i have owned 3 of these cars before!!! the reason for this is it has unrestricted flow and eats every bit it can and the poor computer has to compensate.... anyway, other 'CONSTRUCTIVE" feedback plz, the eaton unit is un-efficient and boring, dont want another ecotec as its not nearly as built as this block is, and im not leaving it alone after this is done it just seems like a much better platform that a busted as$ ecotec like 92% of commo owners out there, but ITS SOMETHING DIFFERENT and you ppl seem to be afraid of this.... neva know if ya neva try ...

well fark me, sorry dude was just a thought.. but obviously not 'CONSTRUCTIVE' enough for ya...

you must be the only one who's put a cai on properly cause i've never herd of it doubling fuel econ before....

enjoy

[commoVT]

i think this guy might be onto something, the l67 is built stronger than a standard ecotec isnt it? so i think it would make a pretty good base for a v6 project...

[GEN3RATD]

Rather then a t-56 I'd probably price up a built powerglide to handle the torque

[Allistaire]

Yeah but he wants a manual , you would be able to easily get a manual to handle the torque but they chew the fuel and are a Bast%rd to launch. I had a 1998 Spac VT with all the FIT goodies and tunes of boost with a manual and it was a pig to lauch and chewed the fuel . Heaps of fun though

[VKCOMMO]

Have you thought of twincharging it?

[VKCOMMO]

Yeah but he wants a manual , you would be able to easily get a manual to handle the torque but they chew the fuel and are a Bast%rd to launch. I had a 1998 Spac VT with all the FIT goodies and tunes of boost with a manual and it was a pig to lauch and chewed the fuel . Heaps of fun though

They only use the fuel if you drive with your foot welded to the floor.. Manuals use less power than Auto's, so they will also use less fuel to run..

[GEN3RATD]

Yeah but he wants a manual , you would be able to easily get a manual to handle the torque but they chew the fuel and are a Bast%rd to launch. I had a 1998 Spac VT with all the FIT goodies and tunes of boost with a manual and it was a pig to lauch and chewed the fuel . Heaps of fun though

Sarcasm must have been lost on you...

[wraith]

They only use the fuel if you drive with your foot welded to the floor.. Manuals use less power than Auto's, so they will also use less fuel to run..

Yes because it's that simple........

[don0xer]

good luck with your conversion quest...

1. if your getting 17L/100k youve stuffed something up. check your vacc hoses and all clamps are tight for air leaks. if you put a oiled filter on it... clean the filter+maf and never oil it again.
2. there are plenty of power options with the m90 which are insignificant in price to say an outright 'otherbrand' charger kit ect. see yella terra/mace/TTT performance
3. check out l67torque.com as there is quite a few guys on there who have changed to a t5 ect.
4. /endthread

[SBM]

I'm not sure if anyone here did maths at school but 12.6 doubled is 25.2 which is a far cry from 17.3. Either way installing a CAI shouldn't increase fuel economy but improve it. A t56 behind the l67 would probably be the best choice but why de-charge it?

[Michelson4301]

There is a dude up here that has gone twin charged on his L67. Still ironing out bugs.