z06 243s vs PRC as cast 225s
01-17-2019, 07:04 PM
#21
Take the extra near grand you'll have from going with the PRC's and throw the above plan in the trash.
And buy a good intake. Why do heads cam to slap a big restriction on top of it all?
A lightweight valve train is always good, but a controlled valve train is most important. Without knowing all of your goals and RPM range it's hard to say if you should opt for the lighter valves.
And buy a good intake. Why do heads cam to slap a big restriction on top of it all?
A lightweight valve train is always good, but a controlled valve train is most important. Without knowing all of your goals and RPM range it's hard to say if you should opt for the lighter valves.
01-17-2019, 07:08 PM
#22
You're not really giving up anything. It's a good head.
The AI and TEA LS6 heads are just as good. But at this point, you're not any further behind doing a PRC Cast head. And the PAC valve springs, valves, and CHE Bronze guides are all top notch.
If you wait a little while, I'll have my TEA LS6 heads available. With the turned down LS3 valves. At 2.04" it's 83g.
01-17-2019, 07:21 PM
#23
They have them with the hollow-stem valves? They won't be as light as the Z06 valves, but they will be light for a 2.06" valve. Probably ~88-90g or so.
You're not really giving up anything. It's a good head.
The AI and TEA LS6 heads are just as good. But at this point, you're not any further behind doing a PRC Cast head. And the PAC valve springs, valves, and CHE Bronze guides are all top notch.
If you wait a little while, I'll have my TEA LS6 heads available. With the turned down LS3 valves. At 2.04" it's 83g.
You're not really giving up anything. It's a good head.
The AI and TEA LS6 heads are just as good. But at this point, you're not any further behind doing a PRC Cast head. And the PAC valve springs, valves, and CHE Bronze guides are all top notch.
If you wait a little while, I'll have my TEA LS6 heads available. With the turned down LS3 valves. At 2.04" it's 83g.
01-17-2019, 07:36 PM
#24
I was in a similar dilemma checkout my thread “Got into the 10’s with my 100k mile N/A Bird” in drag race results section, I had non-milled LS6 heads and my Streetsweeper cam is right at the mark where PTV clearance was a concern if I wanted to mill, ( and this is another point I’d like to make for the OP that I believe is huge plus!) My quest for compression would be compromised by having to fly cut my pistons, I then went with the PRC 225’s, was able to shoot for the compression ratio w/o having to flycut
01-17-2019, 07:57 PM
#25
10 Second Club
iTrader: (8)
ok....that's easily in stock 243 head territory. I made 451whp with a stock head on just a bolt on ls6.
You're likely better off with a good intake and larger tb than you are spending $ on ported heads then slapping a stock intake/tb on a set of heads that flow 50cfm more than the intake.
What kinda track et/mph you looking for?
Biggest bang for your buck will be getting a intake suitable to the rpm you want to turn and getting that junk clutch out of the car and putting something nice and light in it.
You're likely better off with a good intake and larger tb than you are spending $ on ported heads then slapping a stock intake/tb on a set of heads that flow 50cfm more than the intake.
What kinda track et/mph you looking for?
Biggest bang for your buck will be getting a intake suitable to the rpm you want to turn and getting that junk clutch out of the car and putting something nice and light in it.
01-17-2019, 07:57 PM
#26
I was in a similar dilemma checkout my thread “Got into the 10’s with my 100k mile N/A Bird” in drag race results section, I had non-milled LS6 heads and my Streetsweeper cam is right at the mark where PTV clearance was a concern if I wanted to mill, ( and this is another point I’d like to make for the OP that I believe is huge plus!) My quest for compression would be compromised by having to fly cut my pistons, I then went with the PRC 225’s, was able to shoot for the compression ratio w/o having to flycut
Just checked out your thread. That is as close as a comparison to what I'm looking at as you can get with the z06 true LS6 heads to the PRC 225s. Nice work!
Last edited by LS_ELKO41; 01-17-2019 at 08:12 PM.
01-17-2019, 08:02 PM
#27
ok....that's easily in stock 243 head territory. I made 451whp with a stock head on just a bolt on ls6.
You're likely better off with a good intake and larger tb than you are spending $ on ported heads then slapping a stock intake/tb on a set of heads that flow 50cfm more than the intake.
What kinda track et/mph you looking for?
You're likely better off with a good intake and larger tb than you are spending $ on ported heads then slapping a stock intake/tb on a set of heads that flow 50cfm more than the intake.
What kinda track et/mph you looking for?
Last edited by LS_ELKO41; 01-17-2019 at 08:14 PM.
01-17-2019, 08:40 PM
#29
That EPS cam will run hard. I had the 234/242 111+3 variant. It's streetable, but it does have some less than stellar manners. Mostly on coast down under 1500rpm is what I couldn't tune out. But pulled like crazy.
If you talk to Geoff about it, I'd get it cut on the .629 intake... take advantage of more lift with the PRC 225s. And the 62cc with Cometic .040s would be perfect for that. It'll end up right around 11.2:1 CR with the 62cc chambers, which would be great with that cam.
Make sure you have 1-7/8" headers... and I'd go ahead and do the FAST 102 or MSD 103 intake with it. That's more important than the heads...
If you talk to Geoff about it, I'd get it cut on the .629 intake... take advantage of more lift with the PRC 225s. And the 62cc with Cometic .040s would be perfect for that. It'll end up right around 11.2:1 CR with the 62cc chambers, which would be great with that cam.
Make sure you have 1-7/8" headers... and I'd go ahead and do the FAST 102 or MSD 103 intake with it. That's more important than the heads...
01-17-2019, 08:53 PM
#30
That EPS cam will run hard. I had the 234/242 111+3 variant. It's streetable, but it does have some less than stellar manners. Mostly on coast down under 1500rpm is what I couldn't tune out. But pulled like crazy.
If you talk to Geoff about it, I'd get it cut on the .629 intake... take advantage of more lift with the PRC 225s. And the 62cc with Cometic .040s would be perfect for that. It'll end up right around 11.2:1 CR with the 62cc chambers, which would be great with that cam.
Make sure you have 1-7/8" headers... and I'd go ahead and do the FAST 102 or MSD 103 intake with it. That's more important than the heads...
If you talk to Geoff about it, I'd get it cut on the .629 intake... take advantage of more lift with the PRC 225s. And the 62cc with Cometic .040s would be perfect for that. It'll end up right around 11.2:1 CR with the 62cc chambers, which would be great with that cam.
Make sure you have 1-7/8" headers... and I'd go ahead and do the FAST 102 or MSD 103 intake with it. That's more important than the heads...
01-17-2019, 09:13 PM
#33
My best advice read Mavn's thread it's an excellent blueprint to consider. Also keep some cash available to replace the stock clutch. Depending on what type of car you have, what year, use and luck the stock clutch may or may not last a while at ~420+ level. Depending on cam & intake you could make 420 to 460 whp etc. Luckily the stock clutch held at 418 whp for a while in my 99 TA.
BTW - big fan of the TEA 5.3 and TEA LS6 heads like Jake mentioned. I ran a set of TEA Stage 2 5.3's for 15 years and 130,000 + miles. Definitely like TEA quality.
BTW - big fan of the TEA 5.3 and TEA LS6 heads like Jake mentioned. I ran a set of TEA Stage 2 5.3's for 15 years and 130,000 + miles. Definitely like TEA quality.
01-17-2019, 09:26 PM
#34
10 Second Club
iTrader: (8)
I mainly said that range of power to be conservative but I would ideally be at 450+ with the 1 7/8 headers, ud pulley, and better heads with a cam in the 23x/24x or 23x/23x size. I might now save a little longer for fast setup and sell off my ls6 intake. I may consider SE true duals as well since I want to ditch the LM1 the car came with when I bought it. If I were to take it to the track, I would want to trap at least 118-122/low 11s, but I really don't have much experience in that area. I just want to be able to outrun the new 392 and 6.2 FI Mopars on the street basically.
i like free power l Iike ewp with a tensioner delete and a ati balancer. That really frees a engine up. A little weight reduction is always good to. At 450whp you should be looking for 125+ traps.
01-17-2019, 10:11 PM
#35
My best advice read Mavn's thread it's an excellent blueprint to consider. Also keep some cash available to replace the stock clutch. Depending on what type of car you have, what year, use and luck the stock clutch may or may not last a while at ~420+ level. Depending on cam & intake you could make 420 to 460 whp etc. Luckily the stock clutch held at 418 whp for a while in my 99 TA.
BTW - big fan of the TEA 5.3 and TEA LS6 heads like Jake mentioned. I ran a set of TEA Stage 2 5.3's for 15 years and 130,000 + miles. Definitely like TEA quality.
BTW - big fan of the TEA 5.3 and TEA LS6 heads like Jake mentioned. I ran a set of TEA Stage 2 5.3's for 15 years and 130,000 + miles. Definitely like TEA quality.
the right gear....light clutch....fast intake....stock 243s and some paying attention to the little things and those cars will look like they're backing up even with a stock ls6 cam.
i like free power l Iike ewp with a tensioner delete and a ati balancer. That really frees a engine up. A little weight reduction is always good to. At 450whp you should be looking for 125+ traps.
i like free power l Iike ewp with a tensioner delete and a ati balancer. That really frees a engine up. A little weight reduction is always good to. At 450whp you should be looking for 125+ traps.
01-18-2019, 12:54 PM
#36
lol
Definitely go with something over the LS6 or all the work and money will be a bit of a waste. You'll pick up power but you'll be leaving a ton on the table.
I see Mavn said the 102 picked up 20 over the 92, that's huge, but we've all seen 92's put in work too so personally I wouldn't pass on a 92 if I found one for a good deal. Can always sell it later and do a 102 if it's really that big of a deal and you cant swing the 102 now
I put heads/intake on a f body (formula hard top) for a buddy that wasn't necessarily super light. It had a 10 bolt and a 4L60 and tubular suspension up front but that's it. Other than that it was full weight. It went 6.8x's straight off the trailer with a torquer v3 cam TFS as cast 220's and a FAST 92 setup. No other tricks or go fast parts except long tubes. So again, if you can only do a 92 I wouldn't stick my nose up at it. Edit: I believe the a/c was taken off and it had a tubular front bumper support but still had all the steel up front, just tubular bumper instead of the big factory bar. Nothing major.
I see Mavn said the 102 picked up 20 over the 92, that's huge, but we've all seen 92's put in work too so personally I wouldn't pass on a 92 if I found one for a good deal. Can always sell it later and do a 102 if it's really that big of a deal and you cant swing the 102 now
I put heads/intake on a f body (formula hard top) for a buddy that wasn't necessarily super light. It had a 10 bolt and a 4L60 and tubular suspension up front but that's it. Other than that it was full weight. It went 6.8x's straight off the trailer with a torquer v3 cam TFS as cast 220's and a FAST 92 setup. No other tricks or go fast parts except long tubes. So again, if you can only do a 92 I wouldn't stick my nose up at it. Edit: I believe the a/c was taken off and it had a tubular front bumper support but still had all the steel up front, just tubular bumper instead of the big factory bar. Nothing major.
01-18-2019, 01:12 PM
#37
lol
Definitely go with something over the LS6 or all the work and money will be a bit of a waste. You'll pick up power but you'll be leaving a ton on the table.
I see Mavn said the 102 picked up 20 over the 92, that's huge, but we've all seen 92's put in work too so personally I wouldn't pass on a 92 if I found one for a good deal. Can always sell it later and do a 102 if it's really that big of a deal and you cant swing the 102 now
I put heads/intake on a f body (formula hard top) for a buddy that wasn't necessarily super light. It had a 10 bolt and a 4L60 and tubular suspension up front but that's it. Other than that it was full weight. It went 6.8x's straight off the trailer with a torquer v3 cam TFS as cast 220's and a FAST 92 setup. No other tricks or go fast parts except long tubes. So again, if you can only do a 92 I wouldn't stick my nose up at it. Edit: I believe the a/c was taken off and it had a tubular front bumper support but still had all the steel up front, just tubular bumper instead of the big factory bar. Nothing major.
Definitely go with something over the LS6 or all the work and money will be a bit of a waste. You'll pick up power but you'll be leaving a ton on the table.
I see Mavn said the 102 picked up 20 over the 92, that's huge, but we've all seen 92's put in work too so personally I wouldn't pass on a 92 if I found one for a good deal. Can always sell it later and do a 102 if it's really that big of a deal and you cant swing the 102 now
I put heads/intake on a f body (formula hard top) for a buddy that wasn't necessarily super light. It had a 10 bolt and a 4L60 and tubular suspension up front but that's it. Other than that it was full weight. It went 6.8x's straight off the trailer with a torquer v3 cam TFS as cast 220's and a FAST 92 setup. No other tricks or go fast parts except long tubes. So again, if you can only do a 92 I wouldn't stick my nose up at it. Edit: I believe the a/c was taken off and it had a tubular front bumper support but still had all the steel up front, just tubular bumper instead of the big factory bar. Nothing major.
I didn't realize how much the ls6 restricted these cars. I thought since it wasn't an ls1 intake I was ok. I swapped intakes on my 5.7 Charger by replacing it with the 6.4l one and hooking it up to a window switch to change the manifold from long to short runner mode (or short to long can't remember) and it was around a 20-30whp gain with great torque picked up as well.
01-18-2019, 01:44 PM
#39
-Use the 243s I already have (assuming they aren't paper weights at this point) with z06 valves
-Sell my ls6 intake and stock tb and go with a FAST 92/90 setup or 102 setup if I can find a good deal within the next year
-Cam package with valvesprings (not sure which springs single or dual with a low .600 lift cam and mild lobes and the hollow valves), pushrods, and cam
-Going to need new valve guides possibly, seals, and have the 243s checked over and milled
-SE 1 7/8 headers
-Morel 5315s
-Tune
-LS2 lifter trays
-If I have anything left over then SE true duals
Already have 25% ud pulley, LS2 timing chain, new oil pump, 42# injectors, gaskets, hardware