The ET heads were going on another friends car, but let him do the swap for comparisons sake.
Both cars will dynoed on the same dyno and tuned with HP tuners to peak performance. Same compression CC on the heads.
AFR 205's: 423 rwhp
ET Peformance 215: 445 rwhp
Comparable torque #'s...
Pretty cool considering they cost close to the same...I know A&A Corvette is no longer stocking AFR's anymore and have switched over to ET heads unless specifically asked for by customers
I'd like to see the curves if you can post the graphs. If not, can you give an idea of what HP/TQ was at like 3k, 4k, 5k, 6k, and 7k? And just to reiterate, these are the ETP 11-degree heads right?
So your saying my car could be making 461 with a 224/228 cam-That would be great but I don't think it's possible.
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A Our Heads can be ordered in a smaller chamber size if wanted. This test was "Same compression CC on the heads".
Q Wouldnt the runner sizes make a difference, 205 vs. 215?
Q I agree, not fair comparrison cause they are not the same size head.
A If runner sizes, this small, where to be a huge effect from a 205 to 215, then there would be a trade off for low end torque to upper end horsepower. But a comparison such as this is equal due to that these are both our smaller street heads.
Q Put a milled down AFR 225 against the 215.
A Why not do a ETP 225's to AFR 225's? That is more a equal comparison.
A Our Heads can be ordered in a smaller chamber size if wanted. This test was "Same compression CC on the heads".
Q Wouldnt the runner sizes make a difference, 205 vs. 215?
Q I agree, not fair comparrison cause they are not the same size head.
A If runner sizes, this small, where to be a huge effect from a 205 to 215, then there would be a trade off for low end torque to upper end horsepower. But a comparison such as this is equal due to that these are both our smaller street heads.
Q Put a milled down AFR 225 against the 215.
A Why not do a ETP 225's to AFR 225's? That is more a equal comparison.
Very impressive #'s Craig, I may look into a set of 225's for my 408 in a few months.
One thing a lot of people on here forget is that the ETP heads are an 11 degree design. Due to simple math the ETP design 215's will have less cross sectional area to a 15 degree head with a 215 cc runner. It's really comparing apples to oranges.
The ETP heads are an amazing product and I personally wouldn't reccomend anything but them if the budget is in place.
Plus you get added p-v clearance just from the fact that they are an 11 degree design. A huge benefit for a lot of guys not wanting to flycut.
One thing a lot of people on here forget is that the ETP heads are an 11 degree design. Due to simple math the ETP design 215's will have less cross sectional area to a 15 degree head with a 215 cc runner. It's really comparing apples to oranges.
The ETP heads are an amazing product and I personally wouldn't reccomend anything but them if the budget is in place.
Plus you get added p-v clearance just from the fact that they are an 11 degree design. A huge benefit for a lot of guys not wanting to flycut.
Nate
Exactly. The cross sectional area is smaller, even on their 225s to a 225 AFR'd head.
Match cross sectional area, oh my!
Its a less than fair comparison, with "numbers" going towards AFR, however the ET heads out performed them.
Please, if at all possible post a graph, I'm guessing that the lower end will be greater too.
Exactly. The cross sectional area is smaller, even on their 225s to a 225 AFR'd head.
Match cross sectional area, oh my!
Its a less than fair comparison, with "numbers" going towards AFR, however the ET heads out performed them.
Please, if at all possible post a graph, I'm guessing that the lower end will be greater too.
I would say so too. The AFR's are great heads, but you have to realize that cross sectional area is the most overlooked topic when it comes to heads. AFR actually has more cross sectional area on 205 cc runner on a 15 degree head than the 215 cc ETP heads.
These ETP heads are just engineered to make power everywhere and that's what they do.
Just want to make sure i'm clear on this. The car had AFR's then they switched to the ET head? Or is this 2 seperate cars with different heads?? And if it was the same car that swapped heads was the car dyno'ed the same day. Or was the car dyno'ed before. Thanks
AFR 205 vs ET peformance heads, picked up 22 rwhp 
I would say so too. The AFR's are great heads, but you have to realize that cross sectional area is the most overlooked topic when it comes to heads. AFR actually has more cross sectional area on 205 cc runner on a 15 degree head than the 215 cc ETP heads.
