LG C6 Z06 1 7/8 Super Pro headers in a C5
#1
Drifting
Thread Starter
LG C6 Z06 1 7/8 Super Pro headers in a C5
I've been using LG's 1 3/4 Pro headers for a long time in my car but have not been able to cross the 600rwhp line NA. I'm at 583rwhp now measured at a Rototest dyno so that would be around 642rwhp on a Dynojet. Not that I need the extra 17rwhp but it would be fun to be able to get 600rwhp NA.
LG do not make any 1 7/8 for the C5 so I thought it could be interesting to try if their headers made for the C6 Z06 would fit in a C5
And the result is YES
I had to do some minor mods to the car. Shave off a couple of mm from the engine mounts(both sides) and cut a little from the edge of the plate extending from the frame.
The engine mount.
The plate cut along the header.
Everything in place.
Driver side.
Passenger side.
I do not expect to find the 17rwhp from only the headers change but hopefully I get closer to 600
LG do not make any 1 7/8 for the C5 so I thought it could be interesting to try if their headers made for the C6 Z06 would fit in a C5
And the result is YES
I had to do some minor mods to the car. Shave off a couple of mm from the engine mounts(both sides) and cut a little from the edge of the plate extending from the frame.
The engine mount.
The plate cut along the header.
Everything in place.
Driver side.
Passenger side.
I do not expect to find the 17rwhp from only the headers change but hopefully I get closer to 600
#3
Drifting
Thread Starter
It will be on the dyno soon
It will be interesting to see the difference between the LG 1 3/4" and 1 7/8" on a 427' engine. Maybe it's some truth in the advertised peak power gain ..... and most important that I do not loose anything down low.
It will be interesting to see the difference between the LG 1 3/4" and 1 7/8" on a 427' engine. Maybe it's some truth in the advertised peak power gain ..... and most important that I do not loose anything down low.
#6
Burning Brakes
#7
Former Vendor
At very low RPM's the larger header will look a little better at the start of the pull.....then the line will cross dramatically and in th 3700 - 4000 range you will likely experience a 15 - 20 ft/lb loss in RWTQ.....upstairs the larger and much shorter primary tube should be worth 8-10 peak and slightly more past peak closer where you would likely shift the combination (curve will hang on better).
Not much in this hobby is a "free lunch" as they say....at least not related to camshafts and headers (cylinder heads are actually a different story if properly chosen). You will certainly take a hit in low RPM torque/horsepower output, but the larger tube will bring more to the party upstairs and if you drag race (or roll race on the street) it will be a worthwhile mod as the engine will constantly be in the area of the curve the 1 7/8 headers help improve. A roadrace application however would be far more questionable, especially shorter tracks with lots of tight curves.
Looking forward to your actual dyno results and hopefully a clear A-B dyno comparison (overlay) from the swap.
Cheers,
Tony
Not much in this hobby is a "free lunch" as they say....at least not related to camshafts and headers (cylinder heads are actually a different story if properly chosen). You will certainly take a hit in low RPM torque/horsepower output, but the larger tube will bring more to the party upstairs and if you drag race (or roll race on the street) it will be a worthwhile mod as the engine will constantly be in the area of the curve the 1 7/8 headers help improve. A roadrace application however would be far more questionable, especially shorter tracks with lots of tight curves.
Looking forward to your actual dyno results and hopefully a clear A-B dyno comparison (overlay) from the swap.
Cheers,
Tony