Head flows and Power ?
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From: Lake Jackson,TX
Head flows and Power ? Looking at my set-up-car in sig, my heads I have now flow about 290 at 600 lift. How much of a power gain would I get with another set of heads that flow, say 340 at 600lift. Looking at maybe doing this. But I want a set of heads I can bolt to a iron 408 or bigger in the future! Thats my plan. Tell me your thoughts, thanks!
PS. Cam specs are 232 234 598 598 114lobe.
PS. Cam specs are 232 234 598 598 114lobe.
Last edited by beardWS6; Oct 2, 2005 at 01:02 PM.
With a .598 cam, I wouldn't even be looking at what the head flows at .600". The piston has its greatest velocity and strongest draw when the valve is around .300-.400 lift. That's why heads with strong mid-lift flow numbers out-power heads with superior flow at .600". Take a look at all the cars with AFR 205 heads. Nearly all of them make above-average power, but if you look at the AFR 205 flow at .600", it's nothing spectacular. So why do the AFR 205s make more power? Because they have superior airflow at low and mid-lifts plus very high airspeed (because of the small cross-sectional area). In a nutshell, you should be more concerned with mid-lift flow for the cam you're running.
For a 408 in the future, you may want to wait for the small chamber AFR 225s, but based on Tony Mamo's great results on a 383 with 205s, they still may be worth running, even on a 408.
BTW, I thought you were tired of big cams? Didn't you hate the driveability of your Y1 cam?
For a 408 in the future, you may want to wait for the small chamber AFR 225s, but based on Tony Mamo's great results on a 383 with 205s, they still may be worth running, even on a 408.
BTW, I thought you were tired of big cams? Didn't you hate the driveability of your Y1 cam?
__________________
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.
Thread Starter
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From: Lake Jackson,TX
I was with the Y1. I believe if I would have gotten the Y1 in a 114 lobe or maybe a 115 like HPE`s cam it would have been alot better for my A4. the new cam drives pretty good. I haven`t had it to the track yet to see how she runs! Who know`s, this might be a good combo! Just sorta looking at doing things alittle differant. But the future is a big cubed motor on spray!! Thanks for your reply!!
Originally Posted by beardWS6
I was with the Y1. I believe if I would have gotten the Y1 in a 114 lobe or maybe a 115 like HPE`s cam it would have been alot better for my A4.
Speed density tune, RAF, VE, spark and IAC effective area tables need to be nailed. Edit is very limited in many of these areas.
Thread Starter
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From: Lake Jackson,TX
I had Jason at MTI and Mike at G-force try to tune it. I believe they are some of the best. The Y1 worked well with a 6sp just not my A4! I love the power and sound of it. Didn`t want to get rid of it.
No doubt, those guys are in an elite league when it comes to tuning (especially for WOT dyno power). What I'm talking about though is a comprehensive driveability tune. Done correctly, it usually takes HOURS of data logging to get every phase of driveability spot on. Don't know if they spent the time driving your car and logging your Trim Tables, VE tables, dynamic air vs. desired idle air, spark tables during light throttle, IAC Effective Area, etc. If not, then you owe it to yourself to have those areas addressed with your next cam install.
A kickass driveability tune will make the difference between loving a big cam or hating it.
A kickass driveability tune will make the difference between loving a big cam or hating it.
__________________
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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Originally Posted by Cstraub
Peak flow number x .2552 x No. of Cylinders = HP @ 100% VE This will show you the potential of any engine based on the airflow that it has at its disposal.
Chris
Chris