|
Hi all, I have a 2011 HSV Maloo (similar to the Pontiac G8 sport truck that didn't get released in America). It has the 6.2L (383ci) genIV LS3 engine in it. I have put a Harrop FDFI 1900 supercharger, 1 7/8 headers and twin 3 inch exhaust and a lumpy cam to suit the blower on it. I have no idea what the specs on the cam are, all I specified was that it had to be blower friendly. As is, it makes 560rwhp and it goes and sounds absolutely loving awesome. My problem is that I had never driven a cammed car before and didn't know what to expect. Yes I know, I've read heaps of magazines talking about "street manners' and 'driveability/streetability' etc in modified cars, but the reality is that its almost embarrassing to drive around town because of the surging/ bunnyhopping. My question is : will stroking it to 416ci improve the driveability without having to replace the cam? Will even just porting the heads help? Is it just a matter of doing something to improve torque low in the rev range (nothing happens below 2000rpm), or do I just have to put up with the cam and shut up? I would like to see 600 - 700hp or more out of this car eventually so I am keen to hear any ideas from those with more experience than me (everyone haha). Cheers! Also, why isn't there an LS3 thread already?  not my car, just a google images search, but same thing... Automatic Retard fucked around with this message at 09:09 on May 3, 2014 |
#
¿
May 3, 2014 09:04
|
|
|
|
| # ¿ May 11, 2024 08:46 |
|
|
I thought I had a youtube account, but apparently I have a different one now, which I have to jump through hoops to find out my password. The poo poo I do when I'm drunk... The workshop that has done all the work so far is a reputable GMH approved workshop, and all tuning is done on a dynodynamics dyno. Is it possible to just go and ask them to retune it to sacrifice HP to regain low end torque/street manners with the same cam untill I get the cash/motivation to stroke it etc, or is it just a waste of time thinking that this thing will ever be nice to drive with this cam again... I have a quick vid from the last race event I went to that has the exhaust note, if I can figure out how to access youtube.....
|
|
#
¿
May 4, 2014 11:32
|
|
|
It idles awesomely. It doesn't need revving to stay alive or anything, there's just no torque or power below 2000rpm. Sitting still like at the lights or in the garage it just rocks side to side. Awesome. Cruising around the suburbs though, it's not well mannered at all. What i'd like to know is if doing something to improve torque will fix this, or if its just a characteristic of cams in general that is something that people just put up with... Vids/pics will happen eventually
|
|
#
¿
May 4, 2014 11:40
|
|
|
Jesus gently caress, it's nowhere near as mental as those cams. Fuckit, I'm going to marshall what little brain power I have left right now to sort out this youtube retardation. Edit: yay i'm on the net. Sorry about the poo poo editing heres my car. https://www.youtube.com/watch?v=w75uteGIq_I Edit x2 : now that I've figured out youtube I could go and start it up in the garage, but it's 10'o'clock on a sunday night right now and the car is pretty loving loud. I'm quite drunk though..... Automatic Retard fucked around with this message at 14:52 on May 4, 2014 |
|
#
¿
May 4, 2014 14:15
|
|
|
Ha ha fucken ha cunts.Yeah I tried to edit it but its beyond me at the moment  But anyway, that's what it sounds like. I love it but it's a bitch to drive around town. How can I make it nice to drive again, without swapping the cam back out. I know I could talk to my tuner, and I will, but I want to know what the rest of the world thinks, and google gives me next to nothing on the subject. Automatic Retard fucked around with this message at 16:07 on May 4, 2014 |
|
#
¿
May 4, 2014 15:56
|
|
|
It isn't a stock cam. It had 470rwhp with the blower and cat-back exhaust. Now it has 560rwhp with the cam and headers. Everything else is stock apart from cam gears and valve springs, and probably some other things I can't remember right now. My google-fu is weak, it tells me gently caress-all about overcoming cam related power deficiencies. E: it doesn't spend much time on the dyno, it just gets the poo poo bolted on and then tuned to suit. Everything I get done at that workshop includes free tuning @~$900 E2: and yes, that's what's happening. They're setting idle and WOT I'm guessing. So you think some more loving around on the dyno will sort this poo poo out? Automatic Retard fucked around with this message at 17:08 on May 4, 2014 |
|
#
¿
May 4, 2014 16:53
|
|
|
I was looking at buying a 2011 Camaro SS before I bought the HSV. Its was going to cost about AU$140,000 for something that costs US$40,000 in the States. That was when the Aussie dollar was stronger or as strong as the US dollar. gently caress that. They have the same engine, it's just been massively de-rated for Australia apparently. What's the import situation AU > US like right now?? Automatic Retard fucked around with this message at 17:52 on May 4, 2014 |
|
#
¿
May 4, 2014 17:46
|
|
|
You could, but you'll probably regret it. Unless you're already a functional alcoholic.
|
|
#
¿
May 4, 2014 17:55
|
|
|
I've heard that it's heaps cheaper to take the motor out and ship it all over as "spare parts" and then put it back together. But converting it from RHD to LHD or vice versa and then getting it rego'd is a big drama. .
|
|
#
¿
May 4, 2014 18:20
|
|
|
But seriously, why isn't there an LS3 thread yet? Surely there must be a few modified Camaro/Corvettes in here? Am I the only one with a modified LS3 motor?
|
|
#
¿
May 4, 2014 18:28
|
|
|
I'm seriously comsiderimg adding a centrifugal supercharger to it but I think they make the whole engine bay look ugly. I know that the positive displacement blowers are good at compressing air, but really poo poo at actually sucking it in... Maybe a small remote turbo? That'll give it more overall HP, but will it solve the everyday driveability issue?
|
|
#
¿
May 4, 2014 19:21
|
|
|
VikingSkull posted:Clearly, the answer is this. gently caress yeah Way2slow posted:I had a D1-SC powered LS1 that made 681 RWHP (mild blower cam, headers, ported heads, LS6 intake, bigger crank pulley (for the blower), smaller blower pulley, and it was fully built. I'm near 100% positive a GOOD tune will fix your issue. Some of the first tunes I had resulted in similar issues, and I found the guy had tuned WOT, and "fixed" idle by drilling holes in the TB plate to allow it to idle. This wasn't the right way, obviously, and I didn't find out until I went to resolve them. jamal posted:More poo poo that will make the tuning even more complicated isn't going to help anything. I didn't really think that adding more poo poo would make it nicer to drive, just that blowing air into the positive displacement charger would make heaps more power than just letting it suck its own air in, which these chargers are bad at. Exactly like that camaro above. I'm going to get an OTR and smaller pulley soon, so when they tune it to suit, I'll tell them I want the car to behave itself until I go racing, when I'll get it retuned for max HP. Anyway, the blower isn't the problem, it's only been a prick to drive since the cam and tune. It sounds like it can be tuned to be more docile for daily driving, while keeping the cam in it though, so I'll give that a go. Automatic Retard fucked around with this message at 02:31 on May 5, 2014 |
|
#
¿
May 5, 2014 02:26
|
|
|
Dinosorcerer posted:West Australia represent! I was at Racewars last year (R32 GTR), those 800m roll-ons are a bunch of fun aren't they.  Yeah man racewars was awesome fun! It's a pity that there weren't any places left in the VMax top speed challenge by the time I entered. No great loss though, 'cos I was only getting up to 220kph over the 800m, so I wouldn't have been anywhere near competitive over 1000m. The overall winner got 306kph this year. I've had all the work done by Walkinshaw Performance FormulaTech so far... IOwnCalculus posted:It can definitely be tuned to be better, but "how good" is going to depend on the cam. Even the LSx has its limits where a cam is not going to behave below 1500RPM if it's a stupid big cam. Even 1500rpm would be better than 2000 Automatic Retard fucked around with this message at 07:35 on May 5, 2014 |
|
#
¿
May 5, 2014 07:32
|
|
|
I'm sure I'll sort it out, now that I know that there is, indeed, hope for it. Mods: can I start an LSx megathread type thing?
|
|
#
¿
May 5, 2014 13:36
|
|
|
Dinosorcerer posted:Hmm, if I had to chose a workshop with the worst reputation in WA this would be close to the top. I feel like an idiot talking about workshop reputations and all, but I've seen many people have nothing but trouble from FormulaTech. I would love to hit Barbagallo up for some circuit racing. How often does that sort of thing happen there? I've only gotten invites from HSV for track days there but I'm always working or drunk. I just want to have fun with my car, I'm not willing to spend the necessary megabucks on getting it to be competetive in either drag or curcuit racing. I guess I just want more power for the sake of it, and also because every time I drive it I'm thinking "this thing needs more power" haha Anyway, I recently lost my job cos I'm a retard, and all these plans are going to have to be put on hold till I get another one, but I reckon I'll go to Whoop rear end Wednesday tomorrow. IOwnCalculus - can we change the thread title to an LSx megathread type thing please? I'm really amazed that there isn't one already.
|
|
#
¿
May 20, 2014 11:23
|
|
|
Thanks mate, thats an awesome website! I'll definately head there after winter!
|
|
#
¿
May 22, 2014 06:55
|
|
|
|
| # ¿ May 11, 2024 08:46 |
|
|
How much power does an Over The Radiator air intake net you? I've heard/read anything from 30 or 40hp, to 40+kw. I doubt that would be at the wheels though. Will that get me over 600hp do you think? Blown and cammed LS3 with exhaust mods making 560rwhp so far.
|
|
#
¿
Jul 3, 2014 10:32
|
|