DeaconBlue

iTrader: (5)

I just want to make sure that the LS2 chain 12566482 will be strong/durable enough for my setup. I have a '02 Camaro LS1, with the stock 241 heads. I am planning to install a '01 Z06 camshaft 12560950 and Comp Cams 26918 springs with the Magnum roller 1.85 rocker kit 13705. I would like to use the Melling 10296 HV oil pump and I am trying to void the fitment issues/hassles with a dual row timing chain. This is a fair weather daily driver that I take to three or four HPDE track day events per year.

TIA

DaveCZ06

The LS2 timing chain should fit your setup and be plenty strong enough

3rdCoastPowerSports

iTrader: (5)

LS2 chain is plenty strong... power doesn't break the chain. vibration and slack do... i.e poor harmonic balancer and no timing chain dampener. also the ls2 timing set has some slack in it (just like your stock ls1 timing set)... I didn't like the slack so i bought a Avon Pro Gear timing set and chain, some guys run the C5R chain. For your application i would steer clear of the double roller, more trouble than its worth

3rdCoastPowerSports

iTrader: (5)

can i ask why your are going with 1.85 rockers? also you dont need the HV oil pump, several guys on here have put on the HV oil pump just to take it off and put on a regular melling oil pump

DeaconBlue

iTrader: (5)

Thanks for all the feed back.

I like the shorter duration of the stock LS6 camshaft, but with even higher lift - sort of like a budget LPE GT2-3 cam. I am trying to increase the charge velocity by favoring lift over duration. This is a street legal engine swap application and the chassis is OBD-I, which means it has to pass the dyno roller emissions testing as well.

The reason for the HV oil pump is because the car will have a remote mount filter(s) and a large oil cooler for use on the road course during HPDE and track day events.

DeaconBlue

iTrader: (5)

After doing a bit of research on the flow rating of the 241 vs. 243 heads, I have decided to buy a set of ported 241 heads and plan to fit them with the GM hollow stem valve kits 17801930 and Ti retainers to help reduce the mass.

01MAROONz2890

Someone correct me if I'm wrong but I don't elieve fm sells the hollow valves anymore. Anyway OP why not just find a set of original 02-05 ls6 heads from a z06 or ctsv and use them they will be 243s that can be ported to floweven better and will already have the lightweight valves in them. The heads must be from an ls6 engine though or they will not have the correct valves. Also the 01 z06 cam isn't really worth it IMO if your going to do a z06 cam swap get one from an 02-up year they have more lift and duration than the 01

DeaconBlue

iTrader: (5)

The ported 241 heads flow about 5% better than the stock 243 head without going overboard in port sizing. This keeps the charge velocity higher, which helps to make more torque across the RPM range. Plus the ported 241 heads are about the same price as the stock 243 heads with the solid stem valves.

Using the '01 Z06 LS6 cam with 1.85:1 ProMagum rockers will yield 0.571"/0.571" lift number, with the stock 204/211 degrees of duration @ 0.050". The combo will work better than the '02-04 Z06 LS6 camshaft with the stock 1.70:1 rockers. Plus I would have had to do the trunion upgrade with the stock rockers anyway. Think of the combo I am putting together as a poor man's version of a LPE GT2-3 cam. The hallow stem valves are still out there and combined with the Ti retainers remove valve train mass and allow the engine to rev a bit higher and use the higher lift more effectively, especially with the 918 springs - plus no need for expensive dual springs.

I will use a thinner Cometic 0.040" MLS head gasket instead of the 12498544 stock '02 LS1 0.052" MLS head gasket to help boost static compression ratio a bit as well. That is also cheaper/easier than milling the heads - plus you can always go back to the stock gasket if needed. The change will remove about 2.6cc of chamber volume, so with the 241 head's 66.67cc chamber that should boost the static compression ratio from 10.1:1 to about 10.6:1. That is only slightly better than the stock 243 head's 64.45CC chamber and 10.5:1 static compression ratio (with the stock gasket). It will also make for an easy tune with 92-93 octane pump gas.

Again the aim is to maximize torque across the RPM range of a n/a '02 F-body 5.7L LS1 swapped into a lighter weight vehicle. If this also happen to boost the RWHP numbers nicely, well then that's fine too

The engine also has to be emissions legal in the ODB-I chassis (locally that means the dyno roller tail pipe probe test), so just swapping in the typical popular longer duration cam with a narrower LSA is not a viable option.