my afr dyno
I have very mild heads with 2.02 int. valves and stock exh valves. I would love to put these heads on my moter to see what gain with the same 222/222-.566/.566 112 lsa cam would do with the afr's.
My heads only flow 256 @.500 and257@.600 but my 3726 lb car runs 11.6's @ 118 mph because the heads are barely opened up. These are not awsome times but for such a mild setup with only .015 shaved off the heads , they fall around 10.4 /1 compression and a baby cam.
I think Pdd's car is going to fly with this set up. and probably get better fuel milage along with less cyl. pressure (wear and tare)
I only like to change one thing at a time for this reason. Oh , WHat gears do you have Pdd? And with the cats, that is awsome hp. That cam should have more exh. duration for cats should'nt it?
My heads only flow 256 @.500 and257@.600 but my 3726 lb car runs 11.6's @ 118 mph because the heads are barely opened up. These are not awsome times but for such a mild setup with only .015 shaved off the heads , they fall around 10.4 /1 compression and a baby cam.
I think Pdd's car is going to fly with this set up. and probably get better fuel milage along with less cyl. pressure (wear and tare)
I only like to change one thing at a time for this reason. Oh , WHat gears do you have Pdd? And with the cats, that is awsome hp. That cam should have more exh. duration for cats should'nt it?
Originally Posted by 99RamairBob
I hopethat the AFR 225 Heads have small chambers!
Tony is correct but there in lies the difference between a proper setup and one just bolted together. its also the same reason shop cars dyno considerably more then a regular user who just throws on the same parts. i think results like PPD's will be common as long as people just throw **** together.
i guess non of u guys read what i said before. i didn't want to flycut my pistons. if i milled my heads i would of had too. its not like i just "threw **** together".
Last edited by pdd; Aug 20, 2004 at 03:58 AM.
lookin at that sheet you still have that weird hump...i still think theres something up...i think the last time i mentioned it you had said something about the clutch er something...i have a hard time believing it still though. JMHO
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Originally Posted by foff667
lookin at that sheet you still have that weird hump...i still think theres something up...i think the last time i mentioned it you had said something about the clutch er something...i have a hard time believing it still though. JMHO
Originally Posted by pdd
i was told its the cam
TECH Fanatic
Joined: Mar 2003
Posts: 1,112
Likes: 0
From: Dallas
I didnt read all the posts but
1) you are prolly giving up around 15hp in compression
2) your gears are probably costing you close to 10hp
3) Tony had a EWP which is worth 5-10hp
Just adding those things up gets you over 460rwhp with a small cam. Thats pretty solid IMO.
1) you are prolly giving up around 15hp in compression
2) your gears are probably costing you close to 10hp
3) Tony had a EWP which is worth 5-10hp
Just adding those things up gets you over 460rwhp with a small cam. Thats pretty solid IMO.
Originally Posted by kumar75150
I didnt read all the posts but
1) you are prolly giving up around 15hp in compression
2) your gears are probably costing you close to 10hp
3) Tony had a EWP which is worth 5-10hp
Just adding those things up gets you over 460rwhp with a small cam. Thats pretty solid IMO.
1) you are prolly giving up around 15hp in compression
2) your gears are probably costing you close to 10hp
3) Tony had a EWP which is worth 5-10hp
Just adding those things up gets you over 460rwhp with a small cam. Thats pretty solid IMO.
TECH Senior Member
Joined: Mar 2004
Posts: 14,620
Likes: 17
From: BFE
The AFR used on the Vette were 11.2 CR, also let us not forget that vettes dyno notoriously higher than f-bodies with equal setups.
Cam has a lot to do too.
Had you swapped AFR with same CR, you would have picked up another 12>15 ponies.
that would put you at around 450 horses. That IMO is very respectable with a head that has 205 runners.
Also Tony dynoed his set up in Cali and not in Mass. and on different dynos.
To many variables. Need to compare apples to apples.
can't wait for mine (AFR's)
Cam has a lot to do too.
Had you swapped AFR with same CR, you would have picked up another 12>15 ponies.
that would put you at around 450 horses. That IMO is very respectable with a head that has 205 runners.
Also Tony dynoed his set up in Cali and not in Mass. and on different dynos.
To many variables. Need to compare apples to apples.
can't wait for mine (AFR's)
On The Tree
Joined: Jan 2004
Posts: 192
Likes: 0
Originally Posted by PREDATOR-Z
The AFR used on the Vette were 11.2 CR, also let us not forget that vettes dyno notoriously higher than f-bodies with equal setups.
Cam has a lot to do too.
Had you swapped AFR with same CR, you would have picked up another 12>15 ponies.
that would put you at around 450 horses. That IMO is very respectable with a head that has 205 runners.
Also Tony dynoed his set up in Cali and not in Mass. and on different dynos.
To many variables. Need to compare apples to apples.
can't wait for mine (AFR's)
Cam has a lot to do too.
Had you swapped AFR with same CR, you would have picked up another 12>15 ponies.
that would put you at around 450 horses. That IMO is very respectable with a head that has 205 runners.
Also Tony dynoed his set up in Cali and not in Mass. and on different dynos.
To many variables. Need to compare apples to apples.
can't wait for mine (AFR's)
pdd The good thing is you have a better quality head that has room for imporvement for the future. There is more work that can be done to the afr heads. The patriot heads you had were notorious for sinking valve seats and loosing power due to oil consumption. Now if you want to spray the car or even add a blower you can do it with confidence that you wont lift a head. The AFR heads seal much better then stock heads. Good luck with your car im sure you'll see a difference in performance.
Originally Posted by max's dad
I was always under the impression that the F car dynoed better. Solid rear wastes less that the IRS.
TECH Addict
Joined: Dec 2001
Posts: 2,298
Likes: 2
From: new england
I think 20 hp is a good gain thru cats with this cam. Most of this is from head difference since old TB was 85mm allready. Swapping out LS6 style ported heads with much more compression, and gaiining everywhere in power is a tall order for any head. As mentioned earlier anyone swapping heads when they make over 400rwhp allready had better not expect 50 to 70hp gains, at least not without cam change also.
11 Second Club
Joined: Jul 2003
Posts: 2,311
Likes: 2
From: loudoun county,va
what was the total cost...
hmmm...
2100 for the heads 1100-1300 back for the sale of the pp's
800 for lsx 300 back for sale of ls6
600 for tb 300 for sale of 85mm.
at the high end he only spent 1800 at the low 1600.
looks like 40-45rwhp gain after adding the loss for compression
i know alot of people that would spend 1600 for 45 hp
hmmm...
2100 for the heads 1100-1300 back for the sale of the pp's
800 for lsx 300 back for sale of ls6
600 for tb 300 for sale of 85mm.
at the high end he only spent 1800 at the low 1600.
looks like 40-45rwhp gain after adding the loss for compression
i know alot of people that would spend 1600 for 45 hp
