dskinsler83

Well it turns out that TSP messed up my order and did NOT include the hollow valve stems I wanted and they have shipped. Oh well guess that is why it was cheaper that I was expecting.




What length push rods did you end up using and did I miss what rocker arms you had?

dskinsler83

Also I may be just not smart but what happens to the PCV when switching to the LS6 valley pan? Need a new type of hose and connections or ???

niterydr

7.450" pushrods and my preloads ended up .060-.080" on LS7 lifters.

Ls6 style PCV is different than the LS1 style. I didn't want to grind on my block just yet to accomodate the switch so I am running the LS1 style PCV system with a catch can.

I am running the CHE style bushings with stock rockers, here is a picture for your enjoyment.

niterydr

Nice.

It comes down to assembly, take your time. Power should be similar, just depends upon dyno conditions, health of the motor, etc. The thing about 11.0 compression and a 228 duration intake came is your cranking compression and dynamic compression ratio get up there so you may end up being octane limited. I would also recommend colder plugs, such as a TR6. I ran TR55's (forgot I had them in there!) on the dyno and couldn't run more than 24 degrees of timing on the dyno without knock retard. Also the plugs, when I pulled them, were toast. WAY to hot of a plug for that setup.

dskinsler83

Good to know on the plugs! I do fortunately have a couple of gas stations near the house that have 93 octane. I also keep a couple of bottles of octane boost with me as well as techron for every other fill up. So if I use the LS6 valley cover then I dont need the catch can??

niterydr

Many still run a catch can with the improved LS6 valley cover setup.

dskinsler83

Good my can just showed up today along with a truck load of other parts!

So OP the clutch you chose (the LUK) is going to hold the power you have now or should I go LS7? I am going to be pulling out my motor to clean up the engine bay and such so I might as well change it while I am at it.....of course that mentality is what has caused me going from a water pump replacement to a full H/C/I build with a steering rack rebuild and suspension and front end and new exhaust!!! My wife is about to kill me now I believe lol

niterydr

I am the OP. I'm running a McLeod RST Twin Disc. Ls7 *should* hold these power levels.

93Polo

All depends on how much you abuse it.

dskinsler83

Yeah I got confused between two threads whoops

niterydr

Well I finally found time to get to the track last night at Houston Raceway. Since the Dyno I added a 4" intake and it's straight speed density now on the tune. Also had Tony Mamo port the throttle body. I think at this point it needs an intake manifold upgrade. I haven't had time to get to the dyno yet.

I was​ having trouble logging with my mvpi pro so finally got a log on the last run.
Drivetrain modifications I also swapped in a TR6060 and c6 z06 differential with some poly bushings and some braces.

Running a M&H skinny (17x4.5) in front with Hoosier QuickTime Pros in a 16x9.5x26 flavor on Camaro wheels (16x8) in the rear.

I've never launched on bias ply tires. First launch it was low rpm, kind of bogged, ran 11.91@119. 1.9x 60'

Second run I got after it a bit better. Better burnout, got some rpm into it (3500rpm), and slipped the clutch a bit to much. Here is the result, I'm car 203


Never mind the 1/8 mile mph, track was goofy all night in that reading.

I was a lot happier with this run. Car felt good and now I'm making progress.
Unfortunately there was a lot of breakage last night so I only got 1 more run in. Burnout wasn't good and I should have done a second one..but I was trying to keep the show moving so went to the line. Car rolled out, spun, hopped, I backed out, peddled, and got back in it. 11.7@119, 1.8 60'


So now a new personal best of 11.36@122. Tracks are closed for me until January. Plan on continuing with these tires until I wear them out, then going to a 15" setup. I don't think the car makes enough power to go to a 28" tire (so much cheaper for a 17") but those spindles are expensive! I wish I had more data. Guess I'll run it for now until it's time to replace tires or upgrade spindles.

I still think the car has a 10.99@124-125 in it with a bit more tuning and some more seat time. That's the goal, then nitrous or a blower. I think with more practice there is a 1.5 in this tire setup. Maybe add a fast 92 or 102 if I can get it down to 11.0-11.1 as is.

Thanks for stopping by.

Youtube Video:

dskinsler83

Yep after doing mine and getting the results of dyno testing back, I have purchased a FAST intake. That was a hard pill to swallow.

99blkfrc99

Nice results. I've got a similar setup with similar times. PRC stage 1 heads, TV2 cam and Fast 92. First run was 11.7@121 with 1.9 60. Added a degree of timing then ran 11.5@123 with 1.8 60. Didn't have time to add another degree cause I was helping my wife with her car. Still learning to launch with ET streets. How do you like the QTP's? I'm thinking I should have got those.

93Polo

Yah that 1/8th mile mph is off Good to see you run a good #

I assume you were on TR6s on that run?

niterydr

Yeah it was off all night, and thank you! Also with the Mamo ported throttle body and the 4" intake with Hinson long tubes. I figure it is right around 455whp now. Yes to the TR6 plug.

I think if I can get a low 1.5 60' and lose some weight off the driver and maybe a lighter battery I'll get that 10 second slip.

niterydr

To soon to tell. The 1.67 60' felt good; way to much clutch slip, but I've also dry hopped a 1.8 60' backing out, and a 1.9 leaving essentially off idle with a bog. That is it for track time on this setup.

They seem to grip well even on a cold night, but the track was well prepped. I need more seat time but so far so good!

I think a Fast 92 or 102 would pick up another 10-20hp on this combo based on research, but want to see if I can get that 10 second slip or consistant 11.0-11.1 without throwing more money at it. Need to work on the driver mod. At this point I am thinking of spending money on removing weight is better than another 10-20hp, less drivetrain stress.

If I get bored I may run it down to the local dyno and see if it made more power with the intake and straight speed density, try to get a +450rwhp chart.

niterydr

Update:

Picked up a Line-Lock setup, 2 step, and boost a pump to install. Tracks are opening back up, so I should get the parts on and get the car back to the track. Not sure why but I'm rather "ho hum" about the results on this car right now.

turabo87

OP, I'm inches away from pulling the trigger on the PRC 225 As Cast Heads. I'm at 397whp/400wtq currently with stock heads and a .585/.585/228/230/112LSA cam.

PS: Fun fact, a C5z06 in Youtube with H/C/I (using Trickflow Heads and cam package) made 446-447whp and 411wtq on 23 degrees of timing. The cam used on that Trickflow heads and cam package happens to be my exact cam the .585/.585/228/230/112LSA. That particular car was insensitive to more timing and didn't make any more power nor torque from going from 23-25 degrees.

Couple of questions for you:
1. Did you actually measure your pushrod length to determine that you needed 7.450 or was that calculated or recommended? Reason being I already have BTR 7.400 and LS7 lifters with less than 20k miles on them in the motor and would hate to change them if I could get away with reusing them. (Yes I actually pulled my heads when I did my cam, even though I put the same stock ones back in, just to change out the lifters and refresh the heads and head gaskets).

2. What timing did you end up running? I think you mentioned 24 degrees but was that when you dyno tuned or street tuned? I'm thinking to start with 23 degrees when I street tune.

dskinsler83

Id measure for push rods AND buy new lifters! Johnston link bar

niterydr

I measured the pushrods and these were the recommended ones, so it worked out that is what came with Still on the "LS7" lifters, seem to be holding up for now.

I'd start at 20 and work your way up. Easy to add timing, tough to add pistons.

I can get away with 21-23 degrees of timing at peak torque, depends upon how good the 93 is I find. Any more and the knock sensors wake up. As RPM goes up I can obviously add more as I am beyond peak cylinder pressure after torque peak.

FYI: I am putting on a Mamo ported Fast 102 here in the next few weeks or so (he's currently porting it), and will get back to the dyno to see what it does with the new intake manifold.

I also added a fuel pump +return fuel line and switched out the nitrous to a fast 102 plate setup, LS6 pcv valley, and a host of other small things.

I'd love to see 470+ whp, calculating that the car is right around 455 or so with the 4" intake and TB, but in the end it'll make make what it makes. Guess I'll find out soon enough!