Supercharger vs VXR-Realtime

[walkpau873]

Hiya

As the post title goes.........

What is, the REAL difference between a supercharged VXR and a VXR with rear pipes and Wortec remap?

I mean, is it really a HUGE difference on the open roads, is the acceleration surge, that we all enjoy, hugely different? Is the whine from the charger, a real grin lifter, do the headers make a huge difference?

I know there are loads of questions, and it all been answered before, but ive had my 06 for two years now, done 15k in it and need to decide whether i keep it or move on....

Thanks in advance chaps and chappeses.

[anonymous-user]

the difference the SC makes is huge - about 150hp on average. An LS2 VXR with headers and a 112 will make about 570hp at the flywheel with about the same torque.

Edited by anonymous-user on Thursday 16th October 19:52

[crisisjez]

It makes the car how it should have been.


Nuff said.....

[S600VXR]

crisisjez said:

It makes the car how it should have been.


Nuff said.....

Well said that man... thats why I bough it mostly done

Take a trip in one at one of the meets and judge for yourself, last person I took out was converted. Also try out running a new M3/5 with a stock one and its hard work.. not so in a SC one.

(Pause and wait for the NA crew to jump in... )

[ringram]

wormus said:

the difference the SC makes is huge - about 150hp on average. An LS2 VXR with headers and a 112 will make about 570hp at the flywheel with about the same torque.

BHP wise, the results are here, driveability wise more power is exponentially more interesting, a little bit seems to make a big difference, at least for me.
It will be very noticeable. But note the following



The difference from the best NA 5.7 and worse FI 5.7 is only 48rwhp likewise LS2 its less than 10 bhp! (though that was against a slipping auto)
So to expect 150bhp difference is a crack induced number. Though Ill let you off a few rocks for saying average, actually difference is about 90bhp in the LS2 which will be more like 115bhp flywheel. Still a good amount and very noticeable.

No comment re NA required I wont disagree that a SC vs stock NA isnt a big jump up because it is.

[Dragonball]

You see I have to think to myself that I really want a S/C but hard to justify (admittedly easier when no cash) and looking at approx 100 HP gain for a £4000+ outlay on my LS1

£40+ per pony... ouch!

Please tell me I am right..please...

[ringram]

More horsepower is always required, the question is how to get it

[AM04ARO]

Bear in mind my max revs were 4750 due to belt issues and it puts in perspective the huge power difference a SC makes.

Despite being sick my car beat all but the LS7 out of the non sc cars at much lower revs.

[MyM8V8]

ringram said:

More horsepower is always required, the question is how to get it

.................down!

[crisisjez]

Dragonball said:

You see I have to think to myself that I really want a S/C but hard to justify (admittedly easier when no cash) and looking at approx 100 HP gain for a £4000+ outlay on my LS1

£40+ per pony... ouch!

Please tell me I am right..please...

Any mod is a `heart` buy get out there and have a run in a blown car, if you like, the heart will win and the cash won`t count.

[anonymous-user]

ringram said:

wormus said:

the difference the SC makes is huge - about 150hp on average. An LS2 VXR with headers and a 112 will make about 570hp at the flywheel with about the same torque.

The difference from the best NA 5.7 and worse FI 5.7 is only 48rwhp likewise LS2 its less than 10 bhp! (though that was against a slipping auto)
So to expect 150bhp difference is a crack induced number. Though Ill let you off a few rocks for saying average, actually difference is about 90bhp in the LS2 which will be more like 115bhp flywheel. Still a good amount and very noticeable.

No comment re NA required I wont disagree that a SC vs stock NA isnt a big jump up because it is.

I was thinking of JamieP's car when I dreamt up those figures:



I know somebody will say "fw figures don't count" but that's all I have so tough. Say standard LS2 is 400hp + headers (20hp) = 420fwhp. Given the above graph I would say 150fwhp is a reasonable guestimate for a 112?

[ringram]

Yeah fwhp forget mate. But I see where you are coming from.
Nice gain from Mr GB with 2bar boost. (ie) Drop the MAF

Actually when is yours ready mate? Im expecting 500rwhp from your optimised beasty.

Edited by ringram on Friday 17th October 10:55

[anonymous-user]

ringram said:

Yeah fwhp forget mate. But I see where you are coming from.
Nice gain from Mr GB with 2bar boost. (ie) Drop the MAF

Actually when is yours ready mate? Im expecting 500rwhp from your optimised beasty.

Edited by ringram on Friday 17th October 10:55

Still in bits I'm afraid waiting for the block to come back from the machine shop; probably another couple of weeks I would think. I'm hoping for a lot more than 500rwhp as I asked Mark to spec a combination that would give a reliable 600-650rwhp. Cam grind is being done by Pete Knight and all the components have been selected based on past experience. He's built 3 others and all of them have produced figure I'm looking for.

I'll guess we'll see what happens but I'm sure to publish the results good or bad!

[walkpau873]

Thanks for all the detailled replies.

After losing interest in the Ro, ive fallen in love with it again, so a S/C might even get the old adrenalin flowing again.

I see that there are two main players, Monkfish and RapidGB. Anybody have a particular favourite,ie, why would one system be better than the other etc etc(sorry for being a techno/mech numpty)

As per usual, thanks in advance......

[MyM8V8]

walkpau873 said:

Thanks for all the detailled replies.

After losing interest in the Ro, ive fallen in love with it again, so a S/C might even get the old adrenalin flowing again.

I see that there are two main players, Monkfish and RapidGB. Anybody have a particular favourite,ie, why would one system be better than the other etc etc(sorry for being a techno/mech numpty)

As per usual, thanks in advance......

Think of a number you want, then get both to quote.

[anonymous-user]

walkpau873 said:

I see that there are two main players, Monkfish and RapidGB. Anybody have a particular favourite,ie, why would one system be better than the other etc etc(sorry for being a techno/mech numpty)

Both Roger (Monkfish) and Mark (Rapid) know their stuff and nobody would blame you for choosing either.

Personally I take my car to Mark at Rapid as the Magnacharger he fitted to my car was £2k cheaper than the alternative Harrop offered by Monkfish. Since then Mark and I have developed a friendship and he's a really nice & knowledgeable bloke. I'm sure the guys that take their cars to Monkfish would say the same about Roger.

Both have the ability to look after your car which is the most important thing.

[AM04ARO]

wormus said:

walkpau873 said:

I see that there are two main players, Monkfish and RapidGB. Anybody have a particular favourite,ie, why would one system be better than the other etc etc(sorry for being a techno/mech numpty)

Both Roger (Monkfish) and Mark (Rapid) know their stuff and nobody would blame you for choosing either.

Personally I take my car to Mark at Rapid as the Magnacharger he fitted to my car was £2k cheaper than the alternative Harrop offered by Monkfish. Since then Mark and I have developed a friendship and he's a really nice & knowledgeable bloke. I'm sure the guys that take their cars to Monkfish would say the same about Roger.

Both have the ability to look after your car which is the most important thing.

Have to add to that. My car normally goes to Roger but Mark looked after it very well after an issue at the pod.

Good to have two independents out there.

[ringram]

wormus said:

Still in bits I'm afraid waiting for the block to come back from the machine shop; probably another couple of weeks I would think. I'm hoping for a lot more than 500rwhp as I asked Mark to spec a combination that would give a reliable 600-650rwhp. Cam grind is being done by Pete Knight and all the components have been selected based on past experience. He's built 3 others and all of them have produced figure I'm looking for.

I'll guess we'll see what happens but I'm sure to publish the results good or bad!

Hmm, what boost? 12psi? I recon engine with heads and cam and high compression should do ~430rwhp, you will probably drop some compression, so lets say 400 then add boost and with charger load/dodgy heat/timing etc you probably need around 12psi to hit 600. Plus a massive intercooler But Im just guessing..

[anonymous-user]

Mark said somethig about 12psi. Don't forget it's stroked to 383 and I believe compression stays as standard with the AFRs which suits the Maggie better, especially with a not too lumpy cam...but I'm guessing also. With quality internals and the ARP studs/bolts to hold it all together we should be able to turn the boost up a fair bit and maybe raise the rev limit.

Either way it should be fun finding out When's your new motor being fitted, are you going to strip it first to make sure everything is ok?

Edited by anonymous-user on Friday 17th October 20:17

[ringram]

Yeah, I knew she was 383. NA I dont think you would get more than about ~440rw unless you went mental on the cam and RPM.

Roger is going to check the main and big ends torquewise, crank pickup, plus maybe piston to valve, block clearance etc, but some bolts are torque to yield so you cant really check it other than making sure its at least a certain level(ie) Headbolts, , . Mind you Id rather the gasket go than spin a main bearing. Im pretty confident its all 100% good. Ed from HPF is a perfectionist, but you know what they say, measure twice, cut once..

Roger said something about next week to drop the car up, so maybe sometime the week after? Not sure. I also threw a waxy spanner in the works asking about waxoyl treatment.

Then Ill have to book vixpy's dyno for a half day or so to dial it all in.