CPRsm
Active Member
The correction factor is flawed at high altitude. The correction accounts for pressure drop off, like you would see with a blower. A turbo just spins faster, maintains boost, and only oxygen content falls off. But the correction adds for expected lacking oxygen at elevation and boost, even though boost didn't drop off. So it ends up over correcting. The number advertised then becomes much higher than it would actually be at sea level. This is why vendors don't want to "start, argue, or anything or down grade anything." Combine corrected numbers w telling people your competitor uses flipped ARH headers and you have a recipe for kit sales to folks who don't know any better.
Just depends if you look any farther into the details than that. JPC uses a higher grade stainless, a ball bearing turbo, and a tubular core support. That kinda stuff adds up. And you don't know or tKe it into account it's going to look higher if you only look at numbers. But as Patrick already stated the fastest are twins. But because a single won't make 4000HP. I think JPC's is the fastest kit out there right now. With a damn stick at that lolfor the kits that are out there, I would take the hellion over the JPC. The JPC is a lot of $$, and close in cost to the hellion, and you retain your stock manifolds. If their kit included some high flow headers, it would be a better deal.
That being said, look at the fastest cars at the tracks, when talking turbo combinations, they are running twins.
Aesthetically, twins look and sound better, IMO
Yep, the setup supporting the turbo will be more important than how many you're running.
