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C6 Corvette ZR1 & Z06General info about GM’s Corvette Supercar, LS9 Corvette Technical Info, Performance Upgrades, Suspension Setup for Street or Track
I'm most likely going to go with American Racing setup because of this. I'm planning on having DRM do the build. Currently awaiting Cam Motion BTR Stage 2 cam, ported stealth Mamo MSD, and ported stock tb. Getting excited!
That will be a great build! ARH 2", yes? Plenty of power, but very streetable...
That will be a great build! ARH 2", yes? Plenty of power, but very streetable...
1 7/8" at this point. I've read the threads about the 2" LTs not affecting torque, but I've been referred to the 1 7/8 because of possible torque loss and the fact that it is already a tight squeeze in there. I will never go blown and they have a lot of experience with LS engines and ARH.
We and a few other shops we talk with have all had fitment issues with the hinson headers.
We install a bunch of B&B headers, never any fitment issues and they make great power. I would take a set of b&b headers over hinson, kooks and LG any day. The only one on par quality wise and performance wise to the B&B is the ARH headers.
I understand the figment being good with the BB headers, but I'm surprised that they perform well also, given that they're built:
1) to bolt up to stock H-pipe location, and
2) they have multiple welds instead of a single mandrel bent tube for some of the cylinders
But it's good to hear that despite what might seem to be a limitation, they another good option.
I always ensure my headers utilize merge collectors to scavenge the exhaust efficiently. I find the cheaper "bargain" headers don't utilize them due to costs.
Agreed. Having said that, these "pro tuning" LT's are amongst the worst header designs I've ever witnessed. This isn't a merge...this is a traffic jam of primaries slamming into roughly a foot long section of 3" pipe. Maybe a slight upgrade over OE manifolds...but damn these are just bad in every way from what I see. The primaries actually look "mid-length" and the "collector" is just a section of 3" pipe. These are LS2/LS3 "LT's" according to the website, although it also mentions LS7 in the fitment section. They can be had for $289 though...
Received the BTR Stage 2 cam from Cam Motion today, 230/246 .644/.630. The lift on the side of the cam says .379 for intake and .371 for exhaust. I measured the lift with a caliper to confirm. Max lift was 1.770" on intake, base circle of 1.391".
1.770 - 1.391 = .379
.379 x 1.7 = .644 LS engines with 1.7 rocker ratio
.379 x 1.8 = .682!!
The cam was ordered under the LS7 Camshafts category.
I don't know why but I was thinking about this today. It's readily available in my area and I'm not concerned about the reduction in fuel economy. Initially, I was going to do a couple mods at a time, but now I'm pretty much doing it all at once and haven't went cheap on anything. I have a month to think about it. Also, how much extra would it cost for the conversion and labor involved?
02-06-2017, 12:19 AM
They can be had for $289 though... 
