LS1 vs LS6?
Former Vendor
Joined: Apr 2006
Posts: 2,470
Likes: 2
From: Portland OR
St. Jude Donor '10-'11-'12
Originally Posted by 87bob
What is wrong with Edelbrock Heads?
What is wrong with Edelbrock Heads?
We offer them as well as AFR and TFS and TEA
MFIC
Joined: Aug 2005
Posts: 1,997
Likes: 14
From: Charlotte, North Carolina
Block casting is different from the and the LS1. Water jackets are different between cylinders for decreased cyl. temps. The LS1 Vettes never used the LS1 block. Oil pump is different. Exhaust is different. Intake manifold is diff. than the <2000 LS1. Cam shaft and heads are different.
So to get Z06 performance, sell your car and buy a Z06. Or swap out your heads and cam and be faster than a Z06.
So to get Z06 performance, sell your car and buy a Z06. Or swap out your heads and cam and be faster than a Z06.
Instructor
Joined: Nov 2003
Posts: 180
Likes: 0
From: Vallejo CA
Your wheelin a automatic. At best you have a 3.15 diff, probably the much more common 2.73. Talk to your tuner about gearing as well as how to make your transmission live with the extra ponies. At the very least plan to slap a big cooler on your transmission if you don't replace it with something like a RPM Level IV or V. There is a lot of performance potential in the transmission and rear end gearing.
Thread Starter
Melting Slicks
Joined: Mar 2003
Posts: 2,512
Likes: 49
From: Franklin IN
How is the best way of doing a comparision of heads is flow numbers only or chamber size? With a stock and stroke how small of a chamber (CR) can I go to before I'm asking for detnation problems? I understand the flow numbers by lift. I also understand that too much flow hurts low end torque so where do I focus?
Team Owner
Joined: Sep 2003
Posts: 43,084
Likes: 33
From: Raleigh / Rolesville NC
Not chamber size but flow bench testings.
Look at some of these heads
http://texas-speed.com/shop/category...MID=3&catid=40
Remember a 215 is about as big as a 346 ci can go. and bigger does not mean better or more HP.
No, more air flow HELPS low end torque. and why the AFR 205s with a 224/228 cam, with Fast 92/92 or a LS6/TPIS90 intake/tb combo is one of the best combos for low end torque.
on a budget the the PRC LS6 Stage 2.5 CNC Ported Heads have been very successful
with low end torque needs stay with small cams. 224r 228r or smaller.
Good Luck
Look at some of these heads
http://texas-speed.com/shop/category...MID=3&catid=40
Remember a 215 is about as big as a 346 ci can go. and bigger does not mean better or more HP.
No, more air flow HELPS low end torque. and why the AFR 205s with a 224/228 cam, with Fast 92/92 or a LS6/TPIS90 intake/tb combo is one of the best combos for low end torque.
on a budget the the PRC LS6 Stage 2.5 CNC Ported Heads have been very successful
with low end torque needs stay with small cams. 224r 228r or smaller.
Good Luck
Last edited by AU N EGL; Aug 10, 2010 at 07:53 AM.
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Thread Starter
Melting Slicks
Joined: Mar 2003
Posts: 2,512
Likes: 49
From: Franklin IN
Not chamber size but flow bench testings.
Look at some of these heads
http://texas-speed.com/shop/category...MID=3&catid=40
Remember a 215 is about as big as a 346 ci can go. and bigger does not mean better or more HP.
No, more air flow HELPS low end torque. and why the AFR 205s with a 224/228 cam, with Fast 92/92 or a LS6/TPIS90 intake/tb combo is one of the best combos for low end torque.
on a budget the the PRC LS6 Stage 2.5 CNC Ported Heads have been very successful
with low end torque needs stay with small cams. 224r 228r or smaller.
Good Luck
Look at some of these heads
http://texas-speed.com/shop/category...MID=3&catid=40
Remember a 215 is about as big as a 346 ci can go. and bigger does not mean better or more HP.
No, more air flow HELPS low end torque. and why the AFR 205s with a 224/228 cam, with Fast 92/92 or a LS6/TPIS90 intake/tb combo is one of the best combos for low end torque.
on a budget the the PRC LS6 Stage 2.5 CNC Ported Heads have been very successful
with low end torque needs stay with small cams. 224r 228r or smaller.
Good Luck
Why a higher stall convertor is that so the motor is in it's power range before the stall occurs? I have heard to go to a 24-2500 RPM stall convertor with rear gears in the 3:73 range.
By the way thanks for trying to teach an old dawg new tricks
Former Vendor
Joined: Apr 2006
Posts: 2,470
Likes: 2
From: Portland OR
St. Jude Donor '10-'11-'12
budget... draw a line in the sand you don't want to cross and shop accordingly. The AFR, TFS, WCCH Edelbrock will produce a quicker car even if the dyno number is the same as a lesser head.
Example for you: We did a a h/c combo for someone who already had a h/c combo.
We gave them a smaller cam, set of AFR 205 heads milled for compression. We made less peak power on the dyno, by a decent amount maybe as much as 15 hp but ran 3mph and a tenth or two quicker in the quarter...
Its all about a proper combination for the application intended.. we gained mph and loss time because we put the power band where he could use it.
Look at results not advertising numbers and look at the whole combination.
Stage 3 heads big cam and a huge stall aren't going to be street friendly for someone who is looking for good low and mid range where most of the street driving gets done and the same is true of the opposite.
There is so much more to a head than a flow bench number. In the example above the cheap set of heads outflowed the AFR's on the bench but lost in the race where it mattered.
Example for you: We did a a h/c combo for someone who already had a h/c combo.
We gave them a smaller cam, set of AFR 205 heads milled for compression. We made less peak power on the dyno, by a decent amount maybe as much as 15 hp but ran 3mph and a tenth or two quicker in the quarter...
Its all about a proper combination for the application intended.. we gained mph and loss time because we put the power band where he could use it.
Look at results not advertising numbers and look at the whole combination.
Stage 3 heads big cam and a huge stall aren't going to be street friendly for someone who is looking for good low and mid range where most of the street driving gets done and the same is true of the opposite.
There is so much more to a head than a flow bench number. In the example above the cheap set of heads outflowed the AFR's on the bench but lost in the race where it mattered.
Pro
Joined: Jan 2008
Posts: 597
Likes: 0
From: Tulsa Oklahoma
Example for you: We did a a h/c combo for someone who already had a h/c combo.
We gave them a smaller cam, set of AFR 205 heads milled for compression. We made less peak power on the dyno, by a decent amount maybe as much as 15 hp but ran 3mph and a tenth or two quicker in the quarter...
...Just playing devils advocate..
Pro
Joined: Dec 2009
Posts: 606
Likes: 1
From: Waco Texas
Obviously heads need to be your starting point and match your cam to the flow and specs of the heads.
Former Vendor
Joined: Apr 2006
Posts: 2,470
Likes: 2
From: Portland OR
St. Jude Donor '10-'11-'12
For 400 rwhp, as you stated previous in the thread is what you were looking for..
AFR 205's and a 224/228 cam heads milled from compression is all you would need and be very happy with the results.. which will be more than 400 rwhp...
The tq curve would be the legendary table top and the peak would be about 6000-6200 rpms. It would be and excellent street combination and if the budget supports it this is the direction I would go in for what you said you wanted. Obviously you can make more power with a bigger cam and heads but its not needed to meet your goals.
AFR 205's and a 224/228 cam heads milled from compression is all you would need and be very happy with the results.. which will be more than 400 rwhp...
The tq curve would be the legendary table top and the peak would be about 6000-6200 rpms. It would be and excellent street combination and if the budget supports it this is the direction I would go in for what you said you wanted. Obviously you can make more power with a bigger cam and heads but its not needed to meet your goals.
Team Owner
Joined: Sep 2003
Posts: 43,084
Likes: 33
From: Raleigh / Rolesville NC
Former Vendor
Joined: Apr 2006
Posts: 2,470
Likes: 2
From: Portland OR
St. Jude Donor '10-'11-'12
Race Director
Joined: Jun 2009
Posts: 12,331
Likes: 139
I would say this if you have a 99 model and its an A4 your first thing should be a stall converter period.Secondly rod bolts, you spin that thing higher than 6500 rpms and its a matter of time before something goes boom. Third a specked cam is what you need to go with if not EPS is making some really nice cams that off the shelf are putting big numbers 400+ through locked stalled. I am making 420 N/A and 540 with a 150 shot through an A4 02 ls1. If you want the list pm me and I'll much oblige and give you the list.
good luck
good luck
Burning Brakes
Joined: Aug 2009
Posts: 816
Likes: 0
From: Virginia Beach Virginia
Impossible to make a power guesstimate especially since you didn't even mention which cam you're going to get. With aftermarket heads and all the bolt-ons, even the wimpier "stealth" cams will still break 400rwhp easily. With a nasty cam you could see closer to mid 400s. Probably shoot for a decent, mild cam (224ish duration on a 114 LSA) and you'll probably come close to 425rwhp with all bolt-ons. Auto might lose a little more power though, not entirely sure. Make sure you are going with a higher stall as well. If you don't already have a torque converter that should be your first mod. A 3.23/3.42/3.73 rear if you don't already have one is a great one too.
I would forgo the Z06 intake (I don't remember it really being significantly different but it might be). Go with a real intake like a Vararam. Huge improvement.
Dope
I would forgo the Z06 intake (I don't remember it really being significantly different but it might be). Go with a real intake like a Vararam. Huge improvement.
Dope
Team Owner
Joined: Sep 2003
Posts: 43,084
Likes: 33
From: Raleigh / Rolesville NC