New heads, now what cam??
02-13-2007, 05:50 PM
#1
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New heads, now what cam?? I am working on building up my 02 SS LS1. I recently bought some heads as described:
Stage 3 HPE Ported Ls1 Race Heads
-2.02/1.57 Ferrea stainless race valves
-Double Race Springs are from Competition Products. 1.25" diameter, good to 650 lift.
Springs were fully shot peened, micro polished and destressed.
Fully hand finished and flow tested
-Chromemoly retainers and SLP seals
-68 CC Combusion chambers
Superflow Flow Sheet:
Lift Int Exh
200 147 131
300 214 166
400 256 201
500 291 226
550 301 231
600 308 235
Now I am looking to get a cam. My intentions are to road race/drag race 75% and daily drive 25%.
I also would like to hook up a 100 shot in the future.
Please advice...thanks for your time.
Stage 3 HPE Ported Ls1 Race Heads
-2.02/1.57 Ferrea stainless race valves
-Double Race Springs are from Competition Products. 1.25" diameter, good to 650 lift.
Springs were fully shot peened, micro polished and destressed.
Fully hand finished and flow tested
-Chromemoly retainers and SLP seals
-68 CC Combusion chambers
Superflow Flow Sheet:
Lift Int Exh
200 147 131
300 214 166
400 256 201
500 291 226
550 301 231
600 308 235
Now I am looking to get a cam. My intentions are to road race/drag race 75% and daily drive 25%.
I also would like to hook up a 100 shot in the future.
Please advice...thanks for your time.
Last edited by TonyG; 02-14-2007 at 06:05 PM.
02-14-2007, 02:10 PM
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Originally Posted by TonyG
I am working on building up my 02 SS LS1. I recently bought some heads as described:
Stage 3 HPE Ported Ls1 Race Heads
-2.02/1.57 Ferrea stainless race valves
-Double Race Springs are from Competition Products. 1.25" diameter, good to 650 lift.
Springs were fully shot peened, micro polished and destressed.
Fully hand finished and flow tested
-Chromemoly retainers and SLP seals
-68 CC Combusion chambers
Superflow Flow Sheet:
Lift Int Exh
200 147 131
300 214 166
400 256 201
500 291 226
550 301 231
600 308 235
No I am looking to get a cam. My intentions are to road race/drag race 75% and daily drive 25%.
I also would like to hook up a 100 shot in the future.
Please advice...thanks for your time.
Stage 3 HPE Ported Ls1 Race Heads
-2.02/1.57 Ferrea stainless race valves
-Double Race Springs are from Competition Products. 1.25" diameter, good to 650 lift.
Springs were fully shot peened, micro polished and destressed.
Fully hand finished and flow tested
-Chromemoly retainers and SLP seals
-68 CC Combusion chambers
Superflow Flow Sheet:
Lift Int Exh
200 147 131
300 214 166
400 256 201
500 291 226
550 301 231
600 308 235
No I am looking to get a cam. My intentions are to road race/drag race 75% and daily drive 25%.
I also would like to hook up a 100 shot in the future.
Please advice...thanks for your time.
02-14-2007, 05:02 PM
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Well i am putting this into a RX7, so its got a 4.1 gears, and otherwise a stock 02 LS1 from a Camaro SS. No mods to the RPM or engine yet. The future mods will be pulleys, cam, and possible shot of 100 shot. I will have the ECU reflashed once I am ready to go so that is about all i got for now.
02-14-2007, 05:11 PM
#5
drag racing cam and road racing cam are slightly different.. if you do an RX7.. that would be a pretty damn good road racing car... i would call Thunder or Comp or one of the cam companies and explain what you need the car to do (such as long road course mid to high RPMs, or drag race) and see what you can come up with.. or .. give Patrick G a PM... or he might just see this and chime in anyways..
02-14-2007, 05:32 PM
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Originally Posted by TonyG
Well i am putting this into a RX7, so its got a 4.1 gears, and otherwise a stock 02 LS1 from a Camaro SS. No mods to the RPM or engine yet. The future mods will be pulleys, cam, and possible shot of 100 shot. I will have the ECU reflashed once I am ready to go so that is about all i got for now.
02-14-2007, 07:15 PM
#7
If this is for a stock bottom end 346, a 68cc combustion chamber is going to make your static compression fall below 10.0:1. Not good for power. If you can, see if you can mill the heads and run a thinner head gasket to bring your compression up into the 11s. That will make a pretty big difference in your power production and will greatly affect the cam you choose. What's your exhaust like? What intake combo are you running?
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2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
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02-14-2007, 08:02 PM
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Originally Posted by Patrick G
If this is for a stock bottom end 346, a 68cc combustion chamber is going to make your static compression fall below 10.0:1. Not good for power. If you can, see if you can mill the heads and run a thinner head gasket to bring your compression up into the 11s. That will make a pretty big difference in your power production and will greatly affect the cam you choose. What's your exhaust like? What intake combo are you running?
As for the exhaust, I am going to run 1 7/8" Long tube, to a 2.5" or 3" dual exhaust. As for the intake, the stock LS6 intake will remain, but I will be upgrading to a Fast90/90 in the near future. The motor is out now so I wanna do this install stuff before I put it into the RX7.
Thanks again
02-16-2007, 12:40 PM
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Listen tp what Patrick G has to say, he is one of the more knowledgable cam guys on here and had considerable influence on my recent cam choice. You will definitely want to get those heads milled, how much depends on your cam selection but most likely .030-.050. Then you also need to decide whether or not to flycut, this will also be some what determined by your cam choice. I am no expert of LS1 cams by any means, but I have just researched this topic to death to learn what others have found to work so I could make an informed cam selection choice. What I found is that if you go with too much camshaft, you will definitely need to cut valve reliefs in the pistons for piston to valve clearance and then mill the hell out of your heads to try and get your SCR (static compression ratio) up enough to give you. However if you choose your camshaft wisely you can maintain your DCR with less head milling and most likely get by without the need for flycutting. Other things I have learned (read) you do not need a camshaft that make peak HP at 7000 rpms because our intakes like to make peak HP in the 6300-6500 range, so choosing a cam that works with the intake will net the best results and the fatest curve. Of course I have yet to install my parts yet, so at this point it is purely theoretical or heresay. Also, if you stay with the LS6 intake you may want a few more degrees of intake duration, whereas you may want some increased split if you go with the Fast 90/90. Lastly, I would go ahead and upgrade the rod bolts while you have the motor out as well. That way if you do need to hang it out to 7000, you will have one less thing to worry about.