AFR question?
Thread Starter
TECH Fanatic
Joined: Aug 2003
Posts: 1,130
Likes: 1
From: Tranås, Sweden
AFR question? I´m thinking about buying heads from AFR, What is the difference between 205 and 225? Explain so i understand please 
And what cam should i go with?
Thanks for the help
And what cam should i go with?
Thanks for the help
Originally Posted by D_Run
OK, Then 205 it is...
Recommendations on camchoice?
Recommendations on camchoice?
Originally Posted by Xtnct00WS6
Tony will also have some pretty good recommendations for that. He'll know what cam will fit based on how much is milled from the heads. Everything needs to match up. I think that if you get the 205's milled about .030, he'll reccomend no more than a 224/228 duration cam.
Tony M.
PS....As a side note, I am personally more leary of running tight P to V with hyd. roller cammed engines that rev hard like the LS1.....they are already experiencing valve control issues at high RPM....some of which are more apparent than others (I feel ALL Hyd. roller motors have questionable valve control approaching 7K). A solid roller on the other hand has more spring pressure and no hydraulic plungers to contend with, both of which have a dramatic improvement on valve control allowing tighter P to V clearances to be run with a higher degree of confidence.
Originally Posted by D_Run
OK... do AFR sell complete packages?
what kind of power are we talking about?
what kind of power are we talking about?
OR, provide a clearer picture of what you are trying to achieve, how much octane you have available, your tolerance for a choppy idle, and perhaps an idea of how much $$$ you have to spend. There are plenty of people on this site that could send you in the right direction with all those parameters, but a little digging around on your own would probably be helpful.
Thanks,
Tony
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
Originally Posted by MeentSS02
What's the biggest cam you guys would suggest that would still pass a sniffer? I have a feeling your 224/228 might not...
Actually my former combo just missed passing and had I changed the thermostat to a higher temp (like stock 195') and got the driveline and exhaust warmed up (my car was stone cold) I'm actually fairly certain I would have squeaked by, BUT, too close for comfort for a guy that HAS to pass and doesn't want to be biting his nails during the test.
Tony M.
The cutoff for passing the sniffer test seems to be -7 degrees of overlap at .050". Any more overlap than that has a tough time passing. The 224/228 114 cam has -2 degrees of overlap (so it's a little on the "dirty" side).
__________________
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.
Originally Posted by Tony Mamo @ AFR
224/224 on a 114...or better yet a 115 LSA.
Actually my former combo just missed passing and had I changed the thermostat to a higher temp (like stock 195') and got the driveline and exhaust warmed up (my car was stone cold) I'm actually fairly certain I would have squeaked by, BUT, too close for comfort for a guy that HAS to pass and doesn't want to be biting his nails during the test.
Tony M.
Actually my former combo just missed passing and had I changed the thermostat to a higher temp (like stock 195') and got the driveline and exhaust warmed up (my car was stone cold) I'm actually fairly certain I would have squeaked by, BUT, too close for comfort for a guy that HAS to pass and doesn't want to be biting his nails during the test.
Tony M.
Originally Posted by MeentSS02
Since your heads seem to favor an extra 4* of duration on the exhaust side, would one of those two cams (224/224 on 114 or 115) be better than say a 220/224 option (on a 114)?
Cam choice is always give and take....never a free lunch....LOL
Tony M.
