cuspub

Hey Count. I am not an exhaust expert like thunder for example. In fact Greg has an awesome reputation for his product. All I can say about the older HSV systems is that whether HSV or SS, they both love a more free flowing system. In fact it's fair to suggest that the LS1 (vt to vz) responds far better than their later brethren.

I know I'm late to this conversation however I would like to throw a couple of my thoughts into the conversation (probably all of which have been covered already). Harking back to the original question, it sounds to me like a possible fitting issue, as in a part of the system is touching somewhere. Who knows. As to systems and combination for the LS, having once owned (sold it 2 years ago) one of the better known LS parts supply companies in this country along with a large workshop, I've seen pretty much every available option. IMHO I would go for 1 7/8" headers and a twin 3" (the 3" only because 2.5" systems never sound as good as the throbbing note from a 3"). In reality, with a stock engine the twin 3" is overkill, but whatever. I suggest 1 7/8" for the simple fact that if you end up going with an OTR and a decent camshaft, then the 1 7/8" will work a treat. As to cam selection, wow now there's a can of worms. Finally, should you be considering a cam at some point, understand that the implications with an already low torque at low rpm engine in the LS1, that a largish camshaft will necessitate a hi-stall in auto cars (and with it a trans cooler), or in manual cars (besides a HD clutch) a low diff ratio. The stock 3.46 won't work with any cam larger than, for example, a 220/220. Any larger and 3.7, maybe 3.9 or if a killer cam and quarter mile is your thing, 4.11s. P.S with the auto and a cam, a lower ratio diff is also recommended. I've probably gone off point a little, so sorry for the waffle.

Not that you see too many pics like this one though. Would like to see an F1 shot though, any suggestions where to search?

Check it out. And if you want more information on the engine, go to (you have to become a forum member to log in): http://forums.nizpro.com.au/phpbb/viewtopic.php?t=68

Meril. Thanks for your reply; it’s good to see you’re passionate about the BA. In deed, that you have a penchant for stirring the pot, I’ll bite. But hey, why the agro, not necessary! As you are obviously quite intelligent and well read, you would of course understand that when a data logger indicates the rate at which a vehicle is covering ground, that once the engine hits the rev limiter and is therefore unable to continue gaining speed, that it is easy to extrapolate what the potential would have been. Clicking 4th in the factory ‘box would have simply resulted in a meltdown, hence it was not selected, rather the driver feathered the throttle to the finish line. As you are also well aware, extrapolating mph to ET is the normal thing one does in drag racing – that is assuming you have been involved in all levels of drag racing for the past 30 years as I have and know this – and even with the 126mph terminal, the theoretical but almost totally unlikely in a road car, is a 10.823. But let’s not grasp at straws here. “Well I don't count different fuel or more boost a step away from an off-the-shelf kit. Do you have any proof to backup your claim that the APS/C&V XR6T was running Nitrous? Please tell me you do, as making wild claims like that without any backup is a very dangerous thing to do for your credibility.” An off-the-shelf kit is not boosted over a specific figure, and the ECU is not tuned to run C16 and high boost. The second and third sentences: The answer is I do. But frankly, to appease you by explaining it on here, not! Oh, for the record, if for the sake of extrapolation you want to use a theoretical such as 7.4 @ 172mph, perhaps you should in fact use an equation that is correct: a 7.4 @ 183mph. Best being 100% accurate don’t you think!

Interesting comments 4DoorGTR. Thing is, I am not interested in incriminations or the like, nor do I want to discredit any given forum. As you would have noticed, I did not in fact mention a forum name whatsoever. What I did say was "a friendly forum that is in fact open to genuine comment..." I stated this because due to whatever pressures from within, I am not allowed to post on the forum you mentioned. That's right, I am not allowed, full stop. As to offering sponsorship to that forum, the bottom line 4DoorGTR is there has been a lot going on behind the scenes, much more that you will ever know. But as already stated, I am not interested in slandering the good name of what is a great forum. What is happening on that forum is a particular sponsor literally dominates proceedings and goes to great lengths to shoot down any comment made by opposition sponsors or those members running opposition products. Of course I would love to be the position of being able to offer my opinion, but as stated, I can’t. As to having a chip on my shoulder, in the first instance this may appear to be the case, certainly with how you have described things. To the contrary, no names were mentioned in my post, and once again as already stated, I can’t reply on that forum. Rev210. We have, for example, a customer car whereby it was equipped with a Stage 2 kit and absolutely nothing else (no exhaust mods, no fuel pump changes, nothing) that has run a 12.6 @ almost 114 mph – with stock suspension, stock factory fitted tyres and a tool kit in the tray. Meril. Once again, without casting aspersions, please let me reply to your good point as follows: “With their off-the-shelf Stage 3 kit, slicks, and a modified auto box, they're running 10s...” The following is absolute fact and can be verified. The car in question is not running an off-the-shelf APS Stage 3, it runs in excess of 18-19 psi boost, is juiced (fuel) and utilises a second form of forced induction to assist it achieve the times it has so far. If we go back several months, Nizpro was the first in this country to run an 11 second pass (an 11.7 @ 126mph), with the data logger showing that it was on the rev limiter in 3rd gear (auto) at the 1000ft mark. With the power the engine was making in an otherwise completely stock vehicle, it should have run 132mph (if it didn’t run out of revs) with an equally impressive ET of around a 10.8. Unfortunately at that point Nizpro was simply eons away from sorting the auto which was incredibly slow to chance change gears hence a relatively slow ET. It is extremely difficult competing against a company that is as well funded as APS in that they can fast track enhanced products for demonstration purposes. We can’t…unfortunately. We simply have to plod along offering kits that deliver the goods in the real world. But hey, we have no qualms with anyone wanting to run faster times over the quarter, it’s great for everyone! As to the performance of the opposition Phase 2 product, I wonder if you would like to ponder the following suggestion: Assuming you know a little about drag racing, that at the end of the day in a street car you will never achieve the optimum ET (tyres, road suspension et cetera), hence what is extremely important at least as far as establishing exactly what power an engine is producing, is the MPH it achieves. This being the case, if you were to take the Motor Magazine road test that stated the Phase 2 car achieved 190km/h at the drags, (119mph), then you had a look at all of the customer Phase 2 cars that when taken to the drags can only ever achieve a best of 108mph, you have to start to wonder how the original 119mph was achieved. Was this really the same kit that people are buying? I will leave you to work it out.

Good point. Must be Nizpro's Nissan roots!

Hi all, I would like to introduce myself. I perform the marketing and PR duties pertaining to the Cobra BA XR6 Turbo upgrade packages, and of course work with our state distributors including Edo, we have Ierace Performance in WA, Tilbrook in SA and GCG Turbos in NSW. I don't want this to sound like blatant advertising, rather as I am unable to post on the xr6 forum, I guess I am hoping to find a friendly forum that is in fact open to genuine comment, not contrived statements by a forum sponsor that are designed to try and discredit anyone who dare sto have a differing opinion. As you would all know by know, the potential of the XR6 Turbo is immense, and it is continuing to go from strength to strength, not just with the Nizpro or www.xr6-turbo.com.au products, but with many others around the country. We firmly believe that the BA will become the cult car of the 2000s, just as the VL Turbo has been for almost 18 years. The biggest drawback with them is driveline integrity; hence in the main we are pushing our 'lower' stages, namely Stages 1 and 2. With these we believe the result (a mid 12 second ET and around 113-114mph) is more than adequate for most, certainly given the fact that to drive a vehicle with a Stage 2 and unless you depressed the accelerator and get some boost happening, you would think the car was stock. Not everyone likes this - there are extroverts out there - however for the sake of keeping the boys in blue off your case, it doesn't come much better than what we have to offer. In turn, please, should anyone have any queries about the Cobra kits, and you're not in Qld (contact Edo for that), please contact me. I will provide any details to the local distributor - all of whom are more than happy to supply before and after dyno readouts. Thanks for your time and, as stated, if you want any more details, please either go to the web sites in question or PM or phone me: 0418 362 674. Greg Brindley. PR and marketing - Nizpro Turbocharging & www.xr6-turbo.com.au