a question of power !!
Discussion
I don't know a huge amount and no doubt someone from Monkfish or LSV will be along shortly but I think the limit is about 600bhp on standard internals. The main weekness is the standard pistons, the bottom end is apparently good for 1000bhp (6 bolt main bearing caps help here) but I think most big power peeps will still go for a forged crank and rods. The sky's the limit really, you know you want 1000bhp :P
A few people (Tiler, V8HSV) on here have 600bhp+ I believe.
A few people (Tiler, V8HSV) on here have 600bhp+ I believe.
clutch is first weak point - much above 500 you need to replace it with something more substantial. I assume by slow you are talking about pulling away at the lights etc as opposed to 150+ down the motorway so perhaps you may want to consider a diff upgrade to 3.9 gearing. That can knock 1-1.5 secs off the 1/4 mile time apparently - those that have it describe it as being the equivalent of an extra 50bhp without actually boosting the power. If you want to increase power levels then you can go down the turbo/supercharger route or as ringram will no doubt advise a decent cam or stroker kit. Only thing limiting power with the LS1 and LS2 engines is the budget you're prepared to throw at it. Quick and relatively cheap upgrade is the exhaust/header package combined with a uprated air intake which will gain 30-40hp for most cars at around the 2k price tag
Well_Fans said:
clutch is first weak point - much above 500 you need to replace it with something more substantial. I assume by slow you are talking about pulling away at the lights etc as opposed to 150+ down the motorway so perhaps you may want to consider a diff upgrade to 3.9 gearing. That can knock 1-1.5 secs off the 1/4 mile time apparently - those that have it describe it as being the equivalent of an extra 50bhp without actually boosting the power. If you want to increase power levels then you can go down the turbo/supercharger route or as ringram will no doubt advise a decent cam or stroker kit. Only thing limiting power with the LS1 and LS2 engines is the budget you're prepared to throw at it. Quick and relatively cheap upgrade is the exhaust/header package combined with a uprated air intake which will gain 30-40hp for most cars at around the 2k price tag
its already got charger as its a vxr500 and headers and exhaust on it and more power as in mid range pull ! Well the most logical step is uprating the S/C application - speak to Tiler or look at the VXR Maloo (although I think that has a larger S/C than used for teh VXR500 - Caspy or Wortec care to correct please).
I would speak to Tiler for an independdnet point of view (as well as your supplier of course) as he has been through this mill including a few steps moving up the increased S/C boost process and has reached really quite mad power and torque levels. I believe his S/C is the same as yours as well albeit ona 5.7 rather than the 6.0L.
If ypou have not got them already you most definately need AP's and the racelogic T/C to get the most from the power.
I would speak to Tiler for an independdnet point of view (as well as your supplier of course) as he has been through this mill including a few steps moving up the increased S/C boost process and has reached really quite mad power and torque levels. I believe his S/C is the same as yours as well albeit ona 5.7 rather than the 6.0L.
If ypou have not got them already you most definately need AP's and the racelogic T/C to get the most from the power.
Le Sarthe said:
Well the most logical step is uprating the S/C application - speak to Tiler or look at the VXR Maloo (although I think that has a larger S/C than used for teh VXR500 - Caspy or Wortec care to correct please).
I would speak to Tiler for an independdnet point of view (as well as your supplier of course) as he has been through this mill including a few steps moving up the increased S/C boost process and has reached really quite mad power and torque levels. I believe his S/C is the same as yours as well albeit ona 5.7 rather than the 6.0L.
If ypou have not got them already you most definately need AP's and the racelogic T/C to get the most from the power.
thanks got ap's and been thinking about r/l/t/c ,though traction is ok when rolling I would speak to Tiler for an independdnet point of view (as well as your supplier of course) as he has been through this mill including a few steps moving up the increased S/C boost process and has reached really quite mad power and torque levels. I believe his S/C is the same as yours as well albeit ona 5.7 rather than the 6.0L.
If ypou have not got them already you most definately need AP's and the racelogic T/C to get the most from the power.
74TC said:
ok had it a couple of weeks lots of fun now seems to make lots of noise and go slow so couple of questions , what kinda power will this unit take before needing stronger internals , and what kinda a upgrades are there ? thanks
Are you serious? After 2 weeks 500hp seems slow?
booster said:
74TC said:
ok had it a couple of weeks lots of fun now seems to make lots of noise and go slow so couple of questions , what kinda power will this unit take before needing stronger internals , and what kinda a upgrades are there ? thanks
Are you serious? After 2 weeks 500hp seems slow?
In your situation I'd go for more boost from the same supercharger. You can get an intercooler kit for the setup you already have (check out the harrop website), drop the compression ratio (to about 8:1 I think) and run 12psi and get 700bhp 
Ok, it's probably not quite that simple but there are people running that sort of power so if you want it it's there for the taking (at a price ofcourse).
The Harrop intercooler kit is AUD2,500 so shouldn't break the bank over here.
Ok, it's probably not quite that simple but there are people running that sort of power so if you want it it's there for the taking (at a price ofcourse). The Harrop intercooler kit is AUD2,500 so shouldn't break the bank over here.
74TC said:
booster said:
74TC said:
ok had it a couple of weeks lots of fun now seems to make lots of noise and go slow so couple of questions , what kinda power will this unit take before needing stronger internals , and what kinda a upgrades are there ? thanks
Are you serious? After 2 weeks 500hp seems slow?
So how does it compare to the Lambo or the Aston?
booster said:
74TC said:
booster said:
74TC said:
ok had it a couple of weeks lots of fun now seems to make lots of noise and go slow so couple of questions , what kinda power will this unit take before needing stronger internals , and what kinda a upgrades are there ? thanks
Are you serious? After 2 weeks 500hp seems slow?
So how does it compare to the Lambo or the Aston?
yeah it would probably do okay until you get to the "higher" speeds on a private racetrack. Monaro is no more than competent due to the weight up to around 100mph - once you pass that is when it will pull and keep on pulling much better than most competition. Its at that point you'll catch up and pass Scooby and Evo owners. If you want to get there quicker then the diff upgrade should be a priority, the American and Australian owners swear by it. You'll lose a little top end speed and have to change up a bit quicker but you should notice a big difference in getting up to speed. Think any of the Wortec dealers can supply and fit - cost was around 1200 but I gather they had problems with that unit and were moving to a different supplier which was going to push it up nearer 1500 or 1600 iirc.
Edit : of course I could lighten your car a little by taking that heavy supercharger and the AP brakes off you
Edit : of course I could lighten your car a little by taking that heavy supercharger and the AP brakes off you
Edited by Well_Fans on Tuesday 21st November 14:42
mackie1 said:
In your situation I'd go for more boost from the same supercharger. You can get an intercooler kit for the setup you already have (check out the harrop website), drop the compression ratio (to about 8:1 I think) and run 12psi and get 700bhp Ok, it's probably not quite that simple but there are people running that sort of power so if you want it it's there for the taking (at a price ofcourse).
The Harrop intercooler kit is AUD2,500 so shouldn't break the bank over here.
Checked out the Harrop website, saw it mentioned, but no pictures that I could see of the intercooler kit - anyone seen any? Ok, it's probably not quite that simple but there are people running that sort of power so if you want it it's there for the taking (at a price ofcourse). The Harrop intercooler kit is AUD2,500 so shouldn't break the bank over here.
harryoz said:
mackie1 said:
In your situation I'd go for more boost from the same supercharger. You can get an intercooler kit for the setup you already have (check out the harrop website), drop the compression ratio (to about 8:1 I think) and run 12psi and get 700bhp Ok, it's probably not quite that simple but there are people running that sort of power so if you want it it's there for the taking (at a price ofcourse).
The Harrop intercooler kit is AUD2,500 so shouldn't break the bank over here.
Checked out the Harrop website, saw it mentioned, but no pictures that I could see of the intercooler kit - anyone seen any? Ok, it's probably not quite that simple but there are people running that sort of power so if you want it it's there for the taking (at a price ofcourse). The Harrop intercooler kit is AUD2,500 so shouldn't break the bank over here.
answered my own question....
see page 3 here www.harrop.com.au/site_resources/633/616/pdf_version/Stealth_LS112.pdf
assume bits of this fit inside the inlet plenum below the charger?
Well I can vouch for the diff upgrade. Have done 20,000 miles plus with mine and not ever had a hint of a problem including a day around Bedford as well.
It really gives you a good launch especially mid range when changing down and holding just befoe nailing it to overtake...would be very lively on a VXR 500:
It really gives you a good launch especially mid range when changing down and holding just befoe nailing it to overtake...would be very lively on a VXR 500
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