I'm new to this forum and after a bit of information. Just purchased a VX Supercharged. It has cold air induction Pacemaker headers 3" sports system. I have been told that with that size system I may be losing power. Can anyone enlighten me to wether this is right.
3" is probably slightly too much for a relatively stock Super6. If you are planning on modding then it gives you a good base for higher horsepower, but as is you are probably losing a bit. If you're worried about it, go for a twin cat (this is stock on super6) into single 2.5" mandrel bent system. It'll give you an awesome note and get it moving.
i'ld have to do a search, but from memory you loose about 2KW down low with a 3" exhaust on a stock super6. just get a smaller pulley, that'll compensate
Thanks for that bit of information My son had said that I should take boost up to about 10 psi. That way I shouldn't have to do any more mods as its only a daily driver.
Heh yeah the FIT site will help alot, they live and breath for these engines. 10psi means you probably want to run 98RON (BP ultimate, etc), you want that in a daily?
I replaced the factory exhaust with a FIT 3 inch cat back exhaust and it gave me more power down low. The only other mods i have are Pacemaker headers and modified cold air intake.
You don't have to worry about exhaust being too big on the S/C V6 as it's low down torque is so great that the little bit you loose down low will be made up by the extra up top. It's really about how loud you want it or like it. Once you start increasing boost you'll appreciate the extra exhaust size. N/A V6's are more sensitive to exhaust sizing, as scavenging is more important than outright flow. Scavenging is like vaccum and speed together. High speed helps the exhaust in one pipe suck the exhaust out of the next opening exhaust etc etc which in turn increases low end torque and if sized just right will enhance the top end as well. Remember the old hot rodding adage, Horsepower makes great race cars but Torque rules the street. Think about how often your at or near redline.
whats wrong with running BP Ultimate in a daily...i run it in my VXII R8 the fuel is cleaner and sparks more consistently
$5-$6 extra for about 70L over normal unleaded. personally i wont use anything else. each to there own.
I think what he is getting at is if its a daily driver you probably couldnt be bothered running the ultimate unless you can afford it.
fair enough...and what i am saying is that i drive my R8 everyday to work and use ultimate....like i said each to there own
i run my super6 on ultimate day in day out. I think personally you should just go all out and intercool it
Mine used to be picky with 98octane petrol choices but since going to a W2A cooler it seems I can use any fuel even used a full tank of Shell Crappymax while I was away a couple of weekends ago and car still running smooth. Because of my locality lately I've mainly been using Caltex Vortex 98 and no problems.
