View Poll Results: What cam to run with ported 799 heads?
Keep current cam, just get the heads on and save $$$
5
29.41%
Look for a used cam to buy trade for almost zero $$$ loss
0
0%
Order custom EPS cam, sell old cam/heads, and some out of pocket $$$
12
70.59%
Voters: 17. You may not vote on this poll
Keep cam or upgrade with ported/milled 243/799 heads?
03-14-2011, 04:57 PM
#41
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your car has specific needs just get a custom cam, you'll pick up, no question.
he can't go much bigger because he doesn't want to spin the motor up, just needs more efficiency
he can't go much bigger because he doesn't want to spin the motor up, just needs more efficiency
03-14-2011, 09:32 PM
#44
I honestly think your best bet is to get a bigger converter and get your heads sent to people who know their **** such as TEA or WCCH. You said you dont want to send them out, but why go to all that trouble on some heads when your not gonna get it done right. Get your heads professionally done, throw a bigger converter.. If your results still doesnt satisfy you, then GO WITH A BIGGER CAM!
FYI, a sponsor had sent me dyno results with cams within 3 degrees of another and there was not a lot of gains thats worth the money.
Here is a vid of Mr. Tosh and his X1 reverse split pulling on a much larger cam from a roll...
http://www.streetfire.net/video/2004...gto_193478.htm
FYI, a sponsor had sent me dyno results with cams within 3 degrees of another and there was not a lot of gains thats worth the money.
Here is a vid of Mr. Tosh and his X1 reverse split pulling on a much larger cam from a roll...
http://www.streetfire.net/video/2004...gto_193478.htm
Last edited by TXZ28LS1; 03-14-2011 at 09:45 PM.
03-14-2011, 10:45 PM
#45
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Here's a Cam Motion in action:
(dont bash me for the music it aint my video)
http://www.youtube.com/watch?v=9Fssw7rCyos
03-14-2011, 11:55 PM
#46
Not interested in that at all.
I am also not really interested in sending the heads off. I have the tools and as stated will be getting help from an experienced porter, mostly just going to be doing basic clean up, port around valve bosses, polish chambers/exhaust, and that sort of thing.
I could have bought ported heads in the classifieds for the cost of buying cores and sending them off.
I am also not really interested in sending the heads off. I have the tools and as stated will be getting help from an experienced porter, mostly just going to be doing basic clean up, port around valve bosses, polish chambers/exhaust, and that sort of thing.
I could have bought ported heads in the classifieds for the cost of buying cores and sending them off.
03-15-2011, 02:01 AM
#50
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I accept your offer and respond with a counter offer: I didnt mean torque in general, I was intending specifically to mean off-idle torque or low rpm torque at which a manual car has no choice but to fight through in first gear, where an auto car with a decent converter its quite frankly not near as important.
03-15-2011, 03:05 AM
#51
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Thats true in most cases. There is some power to be had but when comparing cams of similar specs, there wont honestly be that much difference.
Here's a Cam Motion in action:
(dont bash me for the music it aint my video)
http://www.youtube.com/watch?v=9Fssw7rCyos
Here's a Cam Motion in action:
(dont bash me for the music it aint my video)
http://www.youtube.com/watch?v=9Fssw7rCyos
03-15-2011, 08:06 AM
#52
TECH Senior Member
I accept your offer and respond with a counter offer: I didnt mean torque in general, I was intending specifically to mean off-idle torque or low rpm torque at which a manual car has no choice but to fight through in first gear, where an auto car with a decent converter its quite frankly not near as important.
03-15-2011, 08:54 AM
#54
Ok well everyone keeps saying to send the heads off...the most cost effective quote I have received from a sponsor I would trust is ~$800 plus shipping.
I bought these heads because I got them for $250 shipped and know a guy who does port work for a shop in Houston and has experience with lsx heads. He has offered to do mine in exchange for a pair of iron lsx heads he wants to sell to a guy who is building a dirt track car.
As previously stated, a friend of my dad's runs a head work machine shop so I can get them milled and a valve job locally for a great deal, he can also install and inspect the valve springs.
If what everyone is saying is true, I would be better off selling my 799 heads after they are ported, putting a little extra with them, and picking up CNC heads from the classifieds. Is that really the case? Does that really make sense?
At this point, sending mine off makes them as expensive as buying brand new ones. Possibly more since one chamber needs some cleanup and a shop might not consider them perfect cores.
I bought these heads because I got them for $250 shipped and know a guy who does port work for a shop in Houston and has experience with lsx heads. He has offered to do mine in exchange for a pair of iron lsx heads he wants to sell to a guy who is building a dirt track car.
As previously stated, a friend of my dad's runs a head work machine shop so I can get them milled and a valve job locally for a great deal, he can also install and inspect the valve springs.
If what everyone is saying is true, I would be better off selling my 799 heads after they are ported, putting a little extra with them, and picking up CNC heads from the classifieds. Is that really the case? Does that really make sense?
At this point, sending mine off makes them as expensive as buying brand new ones. Possibly more since one chamber needs some cleanup and a shop might not consider them perfect cores.
03-15-2011, 09:22 AM
#55
I was in a similar situation. I ported heads for years back in the day. Because of this, I know what it takes to increase a heads flow 40 to 50cfm.
Back in the day, production cylinder heads had a lot of junk in the bowl areas. So, we did a lot of work in the bowl area, lightly reshaped the combustion chambers and then port matched the intake area for a nice flow increase.
These new LS heads are different, they are cast pretty close to perfect right out of the box. So, if you want to make big flow improvements, you have to increase the size of the whole port and do some extensive reshaping to hit 300CFM plus. This makes porting a hell of a lot more technical and labor intensive than on old school production heads. Without a flow bench and a velocity probe, chances of getting ideal results or maintaining any port to port consistency are not good.
So, even with my extensive experience, I just ordered a set of Texas Speed Stage 1 LS6 CNC heads for my 65. I get 313CFM with perfect CNC port to port consistency for $1150. With these, I know I can count on the horsepower gains that I want. I think it is the only way to go.
Back in the day, production cylinder heads had a lot of junk in the bowl areas. So, we did a lot of work in the bowl area, lightly reshaped the combustion chambers and then port matched the intake area for a nice flow increase.
These new LS heads are different, they are cast pretty close to perfect right out of the box. So, if you want to make big flow improvements, you have to increase the size of the whole port and do some extensive reshaping to hit 300CFM plus. This makes porting a hell of a lot more technical and labor intensive than on old school production heads. Without a flow bench and a velocity probe, chances of getting ideal results or maintaining any port to port consistency are not good.
So, even with my extensive experience, I just ordered a set of Texas Speed Stage 1 LS6 CNC heads for my 65. I get 313CFM with perfect CNC port to port consistency for $1150. With these, I know I can count on the horsepower gains that I want. I think it is the only way to go.
03-16-2011, 12:37 AM
#56
First off your car is runnin' well despite dyno #s !!! 12.20 in a flyin' brick
is pretty good. Tigger's right about the heads and I'd suggest callin' Geoff
@ EPS for a cam that works better in your rpm.....Remember Dur.@ .050
is only 1 particular spec and doesn't tell the whole story about HOW the valve
moves through its cycle. I'd bet heads would get ya at least 35 horse and
new lobe technology may-b another 15 still in your 63-6400 safe rpm window
Lastly I'd consider a 3.73 or 3.9 ring and pinion which still isn't crazy for an OD
trans and that car will rip 11.50s all day
is pretty good. Tigger's right about the heads and I'd suggest callin' Geoff
@ EPS for a cam that works better in your rpm.....Remember Dur.@ .050
is only 1 particular spec and doesn't tell the whole story about HOW the valve
moves through its cycle. I'd bet heads would get ya at least 35 horse and
new lobe technology may-b another 15 still in your 63-6400 safe rpm window
Lastly I'd consider a 3.73 or 3.9 ring and pinion which still isn't crazy for an OD
trans and that car will rip 11.50s all day
03-16-2011, 01:49 PM
#58
First off your car is runnin' well despite dyno #s !!! 12.20 in a flyin' brick
is pretty good. Tigger's right about the heads and I'd suggest callin' Geoff
@ EPS for a cam that works better in your rpm.....Remember Dur.@ .050
is only 1 particular spec and doesn't tell the whole story about HOW the valve
moves through its cycle. I'd bet heads would get ya at least 35 horse and
new lobe technology may-b another 15 still in your 63-6400 safe rpm window
Lastly I'd consider a 3.73 or 3.9 ring and pinion which still isn't crazy for an OD
trans and that car will rip 11.50s all day
is pretty good. Tigger's right about the heads and I'd suggest callin' Geoff
@ EPS for a cam that works better in your rpm.....Remember Dur.@ .050
is only 1 particular spec and doesn't tell the whole story about HOW the valve
moves through its cycle. I'd bet heads would get ya at least 35 horse and
new lobe technology may-b another 15 still in your 63-6400 safe rpm window
Lastly I'd consider a 3.73 or 3.9 ring and pinion which still isn't crazy for an OD
trans and that car will rip 11.50s all day
03-17-2011, 04:49 AM
#59
TECH Senior Member
It is all about combination and rpm powerband desired.
That is a RS cam, 90/90, 243 heads ported stock valves,
cam 230/228 110-1LSA
03-17-2011, 06:26 AM
#60
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Ok well everyone keeps saying to send the heads off...the most cost effective quote I have received from a sponsor I would trust is ~$800 plus shipping.
I bought these heads because I got them for $250 shipped and know a guy who does port work for a shop in Houston and has experience with lsx heads. He has offered to do mine in exchange for a pair of iron lsx heads he wants to sell to a guy who is building a dirt track car.
As previously stated, a friend of my dad's runs a head work machine shop so I can get them milled and a valve job locally for a great deal, he can also install and inspect the valve springs.
If what everyone is saying is true, I would be better off selling my 799 heads after they are ported, putting a little extra with them, and picking up CNC heads from the classifieds. Is that really the case? Does that really make sense?
At this point, sending mine off makes them as expensive as buying brand new ones. Possibly more since one chamber needs some cleanup and a shop might not consider them perfect cores.
I bought these heads because I got them for $250 shipped and know a guy who does port work for a shop in Houston and has experience with lsx heads. He has offered to do mine in exchange for a pair of iron lsx heads he wants to sell to a guy who is building a dirt track car.
As previously stated, a friend of my dad's runs a head work machine shop so I can get them milled and a valve job locally for a great deal, he can also install and inspect the valve springs.
If what everyone is saying is true, I would be better off selling my 799 heads after they are ported, putting a little extra with them, and picking up CNC heads from the classifieds. Is that really the case? Does that really make sense?
At this point, sending mine off makes them as expensive as buying brand new ones. Possibly more since one chamber needs some cleanup and a shop might not consider them perfect cores.
get the heads checked out,do a performance VJ,mill for compression and be done with it.you will gain about 15-20hp,maybe a little more, just from swapping stock 799s for your 853s.the VJ will be worth a few more on ponies on top of that.
have the heads flowed, call an expert to spec you a cam based on that and the rest of your combo and goals.
there's power to be had with different lobe profiles,even with cams with similar advertised specs.the key is getting something to match the airflow requirements of the engine.
IMO this would be the best bang for your buck,as far as the HP gains per dollar spent.