TT32VGT

I haven't seen many 454 or 502ci n/a setups.. Or 650-700+rwhp n/a setups.. Most of the bigger cube na setups I've seen haven't been much more then a potent hci setup with compression, 630rwhp or less.. I've tried searching, can anyone point me to a good thread or threads? Thanks!

Z06 Steve

454 or 502 are iron blocks usually

TT32VGT

Erl makes a superdeck where they modify ours to a 434 or 454, also I think all rhs are alum

RGT

ls1tech.com has a 454" build thread you might want to check out. Go the the Gen4 internal engine sub section.

Unreal

In a vette you are limited by the intake manifold most of the time. If you don't mind putting a carb style or something like that then you can make big power on a n/a motor but you aren't making 675+rwhp n/a on a fast 102.

427ZM

^^^^ this. 100% correct. John B on here has the highest HP NA LS7 (pump gas) in the country currently. It's not in his Vette, it's in his. Monte Carlo. It's running a solid lifter setup and a sheet metal intake. Also' what you'll find in searches are that larger cubes aren't making much more (if any) than H/C/I sets when comparing vettes to vettes. As unreal has pointed out, our low hoods restrict our intake manifold choices which limits our power capabilities. Also, staying NA you will find the LS7 is hard to beat. There is no lighter rod and bottom end setup for that matter than the LS7. This is only exasperated when going to larger cubes. Larger pistons are heavier, forged rods are heavier, as are most cranks. Also, the hyper piston expands more than a forged piston creating a better sealed chamber compared to a forged setup.

Just for reference I'm running an ERL 434 with LS7 heads. My rotating assembly is some 3# heavier than a stock bottom LS7.

BOTTLE FEDvette

Damn some good info in here.

Z06Ronald

If I were you and had the cash, either of these:
Katech Performance Engine Packages
Lingenfelter Performance Engineering Engine Packages

briancb1

You're coming at it with a novice approach. By just looking at peak numbers you're purposely neglecting power and more importantly torque under the curve.

The FAST intake and our hood dimensions limit the engines intake options in our cars. My 454 LS7 makes ample torque - 570rwtq from 4800 to 5500rpm. I personally/real life haven't seen any NA LS7's do that while still making a low speed 460rwtq @ 2700rpm with pump gas.

The engine chokes pretty hard up top and is limited to the 620rwhp range because of the FAST intake I'm running.

Sure I can get a low profile sheetmetal intake and gut my low end but it's just a compromise, not an increase at that point.

Case in point; strokers make awesome power. But unless you trashed your motor or building it for a specific application, keeping the stock LS7 with is extremely lightweight rotating assembly is doing the job just fine.

ProEFI

there is a 454 makes 737whp N/A still not sure what is all the setup since everything is secret here, all I know it's an RHS + All pro heads thats all solid.

you can find the dyno video on Instagram @Q8yRun.

other ways LS1teach or yellow bullet.

robz

Not sure if you are in the market for a motor but we made 700+whp with a destroked ls7 and it's for sale.


http://forums.corvetteforum.com/c6-p...-for-sale.html

Superbee

Well I have a 500 cube motor in my vette, made mid 680 hp and mid 680 torque, doesn't like much past 6200 rpm but runs very well. Used for street driving and HPDE

Werks

My n/a RHS block 463ci made 715hp/621ft-lbs to the crank and something like 638 rwhp and revs out over 7k rpm which quite frankly for a track car is more than enough. As others mentioned it's the intake that limits HP on our cars having said that though now that I've been around these cars for a while show me a hci 427 that is putting out a claimed 630+rwhp and I'll show you a happy dyno

meinersk

OOOO my still for sale...Maybe ill blow my engine soon so I can steal your engine..Im about to dump another 6,000 into car and I still wont have your build.....

619grappler

Not necessarily a happy dyno unless they're claiming they're running that on 91 pump. I've seen those number on h/c/i builds but they're usually running huge cams, e85, and a lot of compression.

Werks

Well I'm running E85 with 13:1 compression ratio and a fairly big road race cam with 463 ci displacement built by one of the leading shops in the US, so if you can find a standard 427 with just h/c/i putting out similar numbers I'd really be interested in seeing it I've heard rumors, heard people make claims, was told such and such had xyz hp etc. etc. but when we are all lined up for dyno day people have a tendency to suddenly get really quite. Let's put it this way 630rwhp means that you are making 700+ hp to the crank and it's a lot easier claiming that you have it than actually making it. I would guess that there are probably only a handful of vette's in the country with LS7's really putting down those kind of numbers naturally aspirated.

lane_change

My car is getting buttoned up this week...the guys at D3 Performance Engineering are getting the ProEFI installed and wired up and doing some other smaller misc. tweaks before strapping her down to the dyno so we'll see how she does.

RHS 447ci 12:1 compression
248/262 .651/.631 111 LSA cam
Diamond -4cc pistons w/ coated skirts
Callies H-beam rods
Callies Compstar crank
Mast 305cc 70cc heads
Wilson Sheet Metal Intake
NW 102 TB
ARH 2" Headers w/ ORP
Akrapovic Ti Exhaust
Halltech CF Inake
Mezeire EWP
ID1000cc Injectors
ProEFI EMS
etc....

The car is built for nitrous and also has a Nitrous Outlet Plate system, stand alone fuel system, and such...but we will be tuning the car on motor first and then we'll get some spray numbers as well. So who knows what she'll make, time will tell, but I'm anxious to find out.

Werks

Nice build, the sheet metal intake is going to be key to the potential of your build. The Fast that most of us use is a big limiting factor.

blacktavert

Lane change: looks amazing
Can't wait to see results

The black bitch.

I have a erl block katech k501 cam heads by west coast diamond piston fast intake American headers and a healthy shot of nitrous ,I dyno this week I'm thinking 930 rwhp I'm a little worried I stayed with TI-rods