Cobra intake then supercharger, or just supercharger?

marked8

marked8

Dedicated LVC Member
Joined
Jul 1, 2006
Messages
2,951
Reaction score
27
Location
WV
I will start this out by saying that every man has different epiphany's in his life, one of mine happened last night. I was behind a G6 GXP when he suddenly took off. I mashed it and tried to catch up. It took a few seconds to stop his pull, but I never could close the gap. Did some searching and saw that the 3.6 ones seems to be doing in the 14.2 range stock and with minor bolt ons are doing 13's.
I live in an area where there are more fast cars than not. I see Porsche 911's, M5's, Z06 Vettes, GT500's etc. daily and have accepted that I can not play with them, but a damn 4 door Pontiac G6? And now Mustang V6's are running times stock that our cars hope to do modded. My old Fox body Mustang was relatively quick running a best in the 12.6 range at 108 but had no where near the comfort or sophistication that my Gen II has. I was happy with the 4.10's and t-lok for a while, a short while, but I miss having a faster car. After thinking of selling the Mark for a generic (faster) car I realized that I would not be happy. Part of why I like my Mark is not driving the same car that every other peon is driving.
I have decided to find a used centrifugal supercharger kit and begin my quest for respectable times. The engine has 88,000 miles and I figure it should be able to handle 6-8 PSI on a safe tune without committing suicide.
I know the cost will be relatively high but will have around a 6K budget after selling a few toys. That should at least get the kit, injectors, tune, tranny cooler, J-mod etc. and get me on the road. I already have IMRC delete plates in the closet. Forged internal parts and greater boost can come later when additional funds are saved.
After all of this blathering on, my question is should I install the Cobra intake and then get a blower or sell the Cobra intake to help fund the blower purchase and install? My search turns up split opinions on the subject. The cons of the Cobra intake install (which I have) are that I would have to struggle to retain EGR function (I live in an emissions testing area) and the general hassle of fabricating a few things to work. The pro seems to be future expandability should I decide at a later date to get more serious with it. If it was your car with the aforementioned budget restraints, what would you do? At this point I am leaning toward selling the intake off to fund the purchase but I am not set in stone.
 
Does anyone know how much of a bottleneck the stock Gen II intake will be with forced induction?

I mean I have seen plenty of modded Cobra intakes on EBAY years ago cause the Cobra guys were looking for more flow. So is seeing as both engines were 4.6 and making somewhat similar power how much of a diff is there? Then once you put forced induction in the equation will a Mark intake be fine?

The Cobra intake looks a lot better for Bling factor tho :cool:
 
I think having the cobra intake would make the s/c installation easier. The gen II inatakes are also supposedly pretty restrictive.
 
That's like asking if you should upgrade your camel to a donkey before making it a thourough-bred
 
lsc8 said:
I think having the cobra intake would make the s/c installation easier. The gen II inatakes are supposedly pretty restrictive.
Click to expand...

From what I have been reading the 99-01 Cobra kits will work on Gen II's with minimal mods and the stock intake. Of course with the Cobra intake I would have to use a 96-98 kit. I am starting to lean more to the side of selling the Cobra intake and going straight to blower.
 
I think either way is going to work. A stock bottom end is going to be the bigger limiting factor for now. I'd say it all depends where you want to be at the end. If the 99-01 kit is the cheaper route i'd do that. Pick up a set of c heads later, which your 99-01 s/c will work with. Then build a forged motor, get an intercooler, and turn up the boost.
 
Here's a couple videos from back in the day. Set-up - stock 100k motor and intake, s-trim vortech, intercooler with blow-off valve, blow thru MAF, 60 pound injectors, SVT Focus fuel pump, and KB BAP.

I suggest keeping the stock intake until you decide to go with forged internals. Expect 400 - 450rwhp max on the stock block and stock intake if your tuner is willing to take the risk.


The Mark Supercharged - Car Videos on StreetFire




Supercharged Mark VIII Dyno Tune - Car Videos on StreetFire



Supercharged Lincoln Mark VIII Dyno Tune - Car Videos on StreetFire





themarkscdynotune004-1.jpg
 
Sounds good guys. Looks like my Cobra intake will be going up for sale. Thanks for the opinions.
 
lsc8 said:
I think either way is going to work. A stock bottom end is going to be the bigger limiting factor for now. I'd say it all depends where you want to be at the end. If the 99-01 kit is the cheaper route i'd do that. Pick up a set of c heads later, which your 99-01 s/c will work with. Then build a forged motor, get an intercooler, and turn up the boost.
Click to expand...

I'd agree with the others that the stock bottom end is indeed the limiting factor. At 400rwhp you might need see half a PSI extra with the more restrictive manifold, but you'll still see that 400whp with ease. Personally I wouldn't bother with the C heads later on either. The SC doesn't care what heads it's feeding, you already have beehive springs in your B heads, and with forced induction the port velocity difference isn't much of an issue and is balanced out with the increase in port volume.
 
OK, I have done so much research on this and have blown previous SN series Cobras.

First off, the centri supercharger is the way to go on a B headed car just cause you can intercool it. There is no way I would install a blower on a Mark without the Cobra plenum just cause that look is just pure awesomness! *drools*

With 8psi and an intercooler and Cobra plenum you should see around 350-360rwhp but you can safely run 12 psi as long as you have 42+lb injectors, 90mm MAF, 255lph Focus pump and Cobra rails.
The limiting factor is the rods and pistons. 450 is all they can handle and at 12psi you will be about 30 hp shy of that number. The crank can handle 700ish, I know this because I know of several cars running 670-751rwhp on stock 99-04 GT cranks and its the same crank.

The 96-98 or 99/01 kits will fit fine and the kit you look for will depend if you run your intake or a Cobras. And the only difference there is the inlet tube.



Now I love my twin screw and it is a little more fun but with B heads the only way to intercool is meth. I will be doing a meth kit some day but I hate having limited intercooling which is why i will install a 5 gallon tank so I only have to fill it once every 4 tanks of gas depending how hard I drive it.

At 7.4psi my car makes 331 rwhp and if it was intercooled I would easily see another 30-40hp. Due to high IATs I have to have it run a bit rich and not too much timing.
 
Kinda funny cause I always hated the Mark engine cause the CR was to high to really play with boosting it. Well that and the stock rods and cast pistons untill my guy did this.

Stock cast everything Subaru engine that have glass cast pistons.
492.gif

Bent the rod sideways but didn't hurt anything else in the engine :eek:
Drove home and couldn't figure out why one cylinder was down in compression :rolleyes:

So I want to throw 2 TD04 turbos on my stock Mod engine and push it but I really don't wanna do this :shifty:
 
marked8 said:
I will start this out by saying that every man has different epiphany's in his life, one of mine happened last night. I was behind a G6 GXP when he suddenly took off. I mashed it and tried to catch up. It took a few seconds to stop his pull, but I never could close the gap. Did some searching and saw that the 3.6 ones seems to be doing in the 14.2 range stock and with minor bolt ons are doing 13's.
I live in an area where there are more fast cars than not. I see Porsche 911's, M5's, Z06 Vettes, GT500's etc. daily and have accepted that I can not play with them, but a damn 4 door Pontiac G6? And now Mustang V6's are running times stock that our cars hope to do modded. My old Fox body Mustang was relatively quick running a best in the 12.6 range at 108 but had no where near the comfort or sophistication that my Gen II has. I was happy with the 4.10's and t-lok for a while, a short while, but I miss having a faster car. After thinking of selling the Mark for a generic (faster) car I realized that I would not be happy. Part of why I like my Mark is not driving the same car that every other peon is driving.
I have decided to find a used centrifugal supercharger kit and begin my quest for respectable times. The engine has 88,000 miles and I figure it should be able to handle 6-8 PSI on a safe tune without committing suicide.
I know the cost will be relatively high but will have around a 6K budget after selling a few toys. That should at least get the kit, injectors, tune, tranny cooler, J-mod etc. and get me on the road. I already have IMRC delete plates in the closet. Forged internal parts and greater boost can come later when additional funds are saved.
After all of this blathering on, my question is should I install the Cobra intake and then get a blower or sell the Cobra intake to help fund the blower purchase and install? My search turns up split opinions on the subject. The cons of the Cobra intake install (which I have) are that I would have to struggle to retain EGR function (I live in an emissions testing area) and the general hassle of fabricating a few things to work. The pro seems to be future expandability should I decide at a later date to get more serious with it. If it was your car with the aforementioned budget restraints, what would you do? At this point I am leaning toward selling the intake off to fund the purchase but I am not set in stone.
Click to expand...

Pontiac did their homework with the G6...that car is a hidden gem...just picked up a hard top G6 convertible with the 3.9L...if they could figure out how to put a supercharger on these things they would be plain wicked.
 
Ok This thread got me thinking again. Just when I have made a decision....!!

I have a innercooled vortech v1

and a kenne bell 1.5l (non innercooled)

ready to slap on.

I will not use more than 8psi

The car will be daily driven and maybe a pass or two a year.

What rout should I go! I just cant make my mind up!!!
 
I made 390 on a SQ with a 255, t-rex, stock intake, 42lbs, intercooler, custom MAF and meth on a stock 67k mile (at the time).
 
2002WRXSTi said:
I'm always at a shop that does this on there own. They did a Twin Turbo Viper and made a few other semi remote mount Turbo setups. Kinda what I want to do to mine when I have another DD so I don't need my Mark when it's down for the fabrication :cool:
Click to expand...

so this is a viable option for our vehicles?
 
ratdog442 said:
do you believe this is a viable option for our vehicles?
Click to expand...

Of course. It gives you the element of surprise. It hasn't been don in a Mark. It has been done with a SOHC Crown Victoria, so no reason why it can't be done with a Mark. The price is going to add up quickly. The universal kit is $1995. Then the piping would have to be fabricated from the rear to the front of the engine using stainless tubing. You also need 42lb injectors. Then there's tuning. What I haven't addressed yet is who can tune our ECU's? I've already researched this. Really want to do it this year, but the tuning is my worry.
 
GMAN said:

Of course. It gives you the element of surprise. It hasn't been don in a Mark. It has been done with a SOHC Crown Victoria, so no reason why it can't be done with a Mark. The price is going to add up quickly. The universal kit is $1995. Then the piping would have to be fabricated from the rear to the front of the engine using stainless tubing. You also need 42lb injectors. Then there's tuning. What I haven't addressed yet is who can tune our ECU's? I've already researched this. Really want to do it this year, but the tuning is my worry.
Click to expand...

for a gen 1 this appears to be a better alternative then going through all the modifications necessary for a more traditional setup...anyway when I do this I am going to to do the twin turbo on my existing engine then when it blows up I will address the internals :D...I will follow your progress very closely when you decide to get this done...
 
ratdog442 said:
for a gen 1 this appears to be a better alternative then going through all the modifications necessary for a more traditional setup...anyway when I do this I am going to to do the twin turbo on my existing engine then when it blows up I will address the internals :D...I will follow your progress very closely when you decide to get this done...
Click to expand...

what about reinhart in florida? i dealt with him once...he seems like he could figure it out.
 
ratdog442 said:
what about reinhart in florida? i dealt with him once...he seems like he could figure it out.
Click to expand...

GMAN said:

Of course. It gives you the element of surprise. It hasn't been don in a Mark. It has been done with a SOHC Crown Victoria, so no reason why it can't be done with a Mark. The price is going to add up quickly. The universal kit is $1995. Then the piping would have to be fabricated from the rear to the front of the engine using stainless tubing. You also need 42lb injectors. Then there's tuning. What I haven't addressed yet is who can tune our ECU's? I've already researched this. Really want to do it this year, but the tuning is my worry.
Click to expand...

what about reinhart in florida? i dealt with him once...he seems like he could figure it out.
 
You must log in or register to reply here.

Members online

Total: 343 (members: 1, guests: 342)
Back
Top