stock 243s increase?
#24
LS1 Tech Administrator
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I see a consistent 25rwhp gain by adding LS6 heads if the vehicle has a 220 or larger cam. 15rwhp is too low of an estimate in my experience.
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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.
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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.
#25
TECH Veteran
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Will it be lean or rich?
I am about to put a cam only longblock with the ecm that goes with it, I have a set of 243's sitting here.
I am gonna HPDE this car should I put in Katech rod bolts.
#27
9 Second Club
iTrader: (10)
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A proper valve job on a set of 243's really help. There isn't too many people who I feel do a proper valve job though. Considering I made 444 rwhp 416 tq with unported 62cc 243's with a proper valve job and a 224 cam. I spent around 20 hours doing a "proper" valve job by hand. GM's valve job is a POS, not concentric at all, you should atleast lap the valves to get them to seal.
Than again I used a lot of attention to detail. Did things most guys don't, measured correct pushrod lenght, setup springs .050" from coil bind, measured PTV and actually degreed my cam in. Also correctly port matched my fast to my heads, some of the ports don't line up worth a **** but guys wouldn't know unless they actually took the fast apart and looked. Most guys just slap **** together and wonder why it is low on power. Must be a "low reading dyno" haha
Than again I used a lot of attention to detail. Did things most guys don't, measured correct pushrod lenght, setup springs .050" from coil bind, measured PTV and actually degreed my cam in. Also correctly port matched my fast to my heads, some of the ports don't line up worth a **** but guys wouldn't know unless they actually took the fast apart and looked. Most guys just slap **** together and wonder why it is low on power. Must be a "low reading dyno" haha
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Last edited by Nitroused383; 08-01-2011 at 03:55 PM.
#28
LS1 Tech Administrator
iTrader: (14)
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Pat, if I had a car with a cam only thats already tuned, and drop on stock 243's is a tune required? Will the MAF take care of it? Cam is a 224/231 on a 112.
Will it be lean or rich?
I am about to put a cam only longblock with the ecm that goes with it, I have a set of 243's sitting here.
I am gonna HPDE this car should I put in Katech rod bolts.
Will it be lean or rich?
I am about to put a cam only longblock with the ecm that goes with it, I have a set of 243's sitting here.
I am gonna HPDE this car should I put in Katech rod bolts.
__________________
![](https://ls1tech.com/forums/signaturepics/sigpic210_1.gif)
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.
![](https://ls1tech.com/forums/signaturepics/sigpic210_1.gif)
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.