AFR 205 or 225????
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Staging Lane
Joined: Mar 2002
Posts: 76
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From: North Dallas
AFR 205 or 225???? Hello
I currently have a 2004 Z06 with the G5X3 cam. I am getting ready to do heads in the next month along with the FAST 90 and TB. I want to know should I go with the AFR 205cc or wait for the AFR 225. I plan on keep the stock cubes 346.
Please share your thoughts along with with size chamber I should go with.
Thanks
I currently have a 2004 Z06 with the G5X3 cam. I am getting ready to do heads in the next month along with the FAST 90 and TB. I want to know should I go with the AFR 205cc or wait for the AFR 225. I plan on keep the stock cubes 346.
Please share your thoughts along with with size chamber I should go with.
Thanks
Teching In
Joined: Jul 2004
Posts: 47
Likes: 0
From: Ohio
I'm waiting on the AFR's or Stage II PP LS6 Heads with a 224/244 .581 114 cam or a 224/228. I already have long tubes and full intake mods. I'm hoping to put down close to 450RWHP.
Last edited by Watch22; Jan 4, 2005 at 02:20 PM.
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Verdad Gallardo dont know yet. There isnt enough real world data to make any conclusions from. Only a couple of shops have had a chance to use these. LG motorsport made a monster with just a spring upgrade to the head to support thier cam. Other than that, they were box stock.
One thing you wont want to do is mill the heads though. I spoke with Tony yesterday and he said that milling the snot out of them would hurt more than help by reducing airflow. Make it up with a domed piston instead.
I am sure some touch up work wouldnt hurt them but from what I have read, they seem to do fine as is.
One thing you wont want to do is mill the heads though. I spoke with Tony yesterday and he said that milling the snot out of them would hurt more than help by reducing airflow. Make it up with a domed piston instead.
I am sure some touch up work wouldnt hurt them but from what I have read, they seem to do fine as is.
Help anyone? Guys...
225's ARE OK for stock cubes...perfect for a "more aggressive" H/C combination.
Also, to further clarify, the big cammed high HP 346 that LG ran 140 MPH in the quarter had a set of 205's!!.....NOT 225's.
I have posted numerous times about the benefits of a 225 on a stock displacement engine etc....I don't have the time now but if someone can search and perhaps post a link to the thread I speak in detail about which head is best...a 205 or a 225, I think it will answer alot of your questions. (I've hit this topic already in multiple threads....JRP....where are you when I need you!!....LOL)
In about a month I should have results from my car with the 225's and a slightly bigger bumpstick...that will show some of the larger 225's potential....sit tight for a little while longer.
Thanks,
Tony
PS The same "high velocity" principles have still been incorporated into the AFR 225 port design....Look at it like a 205 on steroids. The 225's will not make as much low RPM part throttle power like some of you guys are experiencing with the 205's, and probably will not help fuel economy as much, but the 225's will shine once the tach starts swinging past 4000 RPM's. At WOT, there might be very little difference between the same combination with a 205 under 4000 RPM's, but the higher the tach swings from there, the larger the delta in power will become with the larger, higher flowing, 225's. The 205 on a stock displacement shortblock is a GREAT street/strip head.....the 225 on a stock displacement shortblock will be a GREAT strip/street head. The question you have to ask yourself is where do you want to place YOUR emphasis on. If your looking at cams over 230' @ .050, my guess is you should be looking more closely at the 225's.
225's ARE OK for stock cubes...perfect for a "more aggressive" H/C combination.
Also, to further clarify, the big cammed high HP 346 that LG ran 140 MPH in the quarter had a set of 205's!!.....NOT 225's.
I have posted numerous times about the benefits of a 225 on a stock displacement engine etc....I don't have the time now but if someone can search and perhaps post a link to the thread I speak in detail about which head is best...a 205 or a 225, I think it will answer alot of your questions. (I've hit this topic already in multiple threads....JRP....where are you when I need you!!....LOL)
In about a month I should have results from my car with the 225's and a slightly bigger bumpstick...that will show some of the larger 225's potential....sit tight for a little while longer.
Thanks,
Tony
PS The same "high velocity" principles have still been incorporated into the AFR 225 port design....Look at it like a 205 on steroids. The 225's will not make as much low RPM part throttle power like some of you guys are experiencing with the 205's, and probably will not help fuel economy as much, but the 225's will shine once the tach starts swinging past 4000 RPM's. At WOT, there might be very little difference between the same combination with a 205 under 4000 RPM's, but the higher the tach swings from there, the larger the delta in power will become with the larger, higher flowing, 225's. The 205 on a stock displacement shortblock is a GREAT street/strip head.....the 225 on a stock displacement shortblock will be a GREAT strip/street head. The question you have to ask yourself is where do you want to place YOUR emphasis on. If your looking at cams over 230' @ .050, my guess is you should be looking more closely at the 225's.
Last edited by Tony Mamo @ AFR; Jan 6, 2005 at 09:20 PM.
tony, then would you suggest 205's for a stock bottom A4 C5 with many bolt-on's? going to install a VHP Boss II .551 216/224 w/ 2800 yank. have donaldson, crane1.8 w/springs, dynatech and magnaflow. VHP tuner 351 rwhp/360ft#tq looking for heads!
Tony,
Thanks for the clarification on the 205's vs. the 62cc 225's.
Is it true you shouldn't mill the 225's? Just curious because I'm looking for a compression ratio around 11.2:1 ~ 11.5:1 and I'm just wondering how I'm going to get there if the 225's can't be milled.
Thanks,
Derrick
Thanks for the clarification on the 205's vs. the 62cc 225's.
Is it true you shouldn't mill the 225's? Just curious because I'm looking for a compression ratio around 11.2:1 ~ 11.5:1 and I'm just wondering how I'm going to get there if the 225's can't be milled.
Thanks,
Derrick
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