AFR Head Questions
Thread Starter
|
New User
Joined: Jul 2017
Posts: 10
Likes: 0
AFR Head Questions
Hey Fellas,
So I came across a set of AFR 185cc (58cc Combustion chambers) heads locally. They are the 1492's with Scorpion pedestal roller rockers, upgraded AFR valve springs, and have been freshly decked. The guy selling them said that the machine shop took .005" off of the deck.
The block that I have is a 351w would of a 1994 E150 van, and it is a roller block according the casting #'s. So my initial questions are as follows:
1. The guy is asking $800 for the set, but they have been up for sale for quite some time. Is $800 a good price on that package, or what would you guys try to get them for? I don't want to be insulting but I do want to make sure I'm getting a good deal.
2. Will this setup function properly on my roller 351? I'm assuming I will need to have the pistons flycut to clear the valves as I plan to run a moderately aggressive cam.
3. The the decked head, and the 58cc combustion chambers, what should I expect for a CR?
4. Will the 185's be sufficient for a 351? I would love to go with the 220's to accommodate future growth, but I dont plan to go stroker or forced induction for quite some time.
I keep reading great things about AFR and have a buddy running them on his LS3 and he is a really big fan. Let me know your thoughts!!
So I came across a set of AFR 185cc (58cc Combustion chambers) heads locally. They are the 1492's with Scorpion pedestal roller rockers, upgraded AFR valve springs, and have been freshly decked. The guy selling them said that the machine shop took .005" off of the deck.
The block that I have is a 351w would of a 1994 E150 van, and it is a roller block according the casting #'s. So my initial questions are as follows:
1. The guy is asking $800 for the set, but they have been up for sale for quite some time. Is $800 a good price on that package, or what would you guys try to get them for? I don't want to be insulting but I do want to make sure I'm getting a good deal.
2. Will this setup function properly on my roller 351? I'm assuming I will need to have the pistons flycut to clear the valves as I plan to run a moderately aggressive cam.
3. The the decked head, and the 58cc combustion chambers, what should I expect for a CR?
4. Will the 185's be sufficient for a 351? I would love to go with the 220's to accommodate future growth, but I dont plan to go stroker or forced induction for quite some time.
I keep reading great things about AFR and have a buddy running them on his LS3 and he is a really big fan. Let me know your thoughts!!
FTE Legend
Joined: Jun 2006
Posts: 31,930
Likes: 1,499
From: Ottawa, Ontario
They are a HUGH improvement over stock with the potential to make 400+hp.. about perfect for this displacement IMO.
Thread Starter
|
New User
Joined: Jul 2017
Posts: 10
Likes: 0
Hi Paul,
Thanks for the excellent info. I'm in the same boat in that the $800 is a good price for whats included, although I've gotta try to get a little discount if possible.
Would the 10:1 be good with aluminum heads? I was reading that 11:1 is pretty ideal, but would most likely require running 93+ octane gas.
Thanks for the excellent info. I'm in the same boat in that the $800 is a good price for whats included, although I've gotta try to get a little discount if possible.
Would the 10:1 be good with aluminum heads? I was reading that 11:1 is pretty ideal, but would most likely require running 93+ octane gas.
FTE Legend
Joined: Jun 2006
Posts: 31,930
Likes: 1,499
From: Ottawa, Ontario
Nothing wrong with 10:1 CR, aluminum heads can work with higher compression ratios because they wick away heat faster but ultimately the results you get is all about the complete combo. Don't forget that aluminum has a much lower melting temp than iron.. it's actually just above normal combustion temps so detonation is very bad, and that could be a real problem depending upon the cam selected and the final drive ratio and curb weight of the vehicle this motor is going into. IMO unless you are building something for competition you don't want to be pushing the limits of any component.
Thread Starter
|
New User
Joined: Jul 2017
Posts: 10
Likes: 0
I completely agree Paul. I am shooting for the 400hp range, as I'm aiming for a stout street truck. Will the pedestal mount roller rockers work with this set up?
I apologize for all the questions, this is my first Ford powerplant and I want to make sure I do it right.
I apologize for all the questions, this is my first Ford powerplant and I want to make sure I do it right.
Thread Starter
|
New User
Joined: Jul 2017
Posts: 10
Likes: 0
They are the pedestal mount version. And the seller said that they are actually Ford Racing 1.6 Roller Rockers. Seems like the Scorpions and the Ford Racing roller rockers are pretty comparable, at least from my little bit of research so far.
Trending Topics
FTE Legend
Joined: Jun 2006
Posts: 31,930
Likes: 1,499
From: Ottawa, Ontario
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 6 Best Deals Available on New Fords & Lincolns Right Now
Brett Foote
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level
Verdad Gallardo
Top 10 Fords at 2026 Carlisle Ford Nationals
Joe Kucinski
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Thread
Thread Starter
Forum
Replies
Last Post
Atlfan65
Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W)
7
Jun 28, 2017 02:19 PM
Handegard
Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W)
12
Nov 28, 2011 11:55 PM
shuttlevalve
Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W)
8
Jun 9, 2007 06:26 AM
mustangman
Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W)
7
Nov 11, 2006 07:35 PM
wvmudder
Big Block V8 - 385 Series (6.1/370, 7.0/429, 7.5/460)
7
Apr 1, 2005 12:45 AM