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Old 12-15-2014, 11:45 PM   #1
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1992 foxbody 331

I have a 1992 foxbody with a 331
I'm planning on changing my heads to some afr 205 heads are those any good for me. I have a t5 trans and a super victor intake
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Old 12-16-2014, 12:09 PM   #2
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I was told by a well reputable Ford Mustang mechanic that one of the best of the best all around heads to buy is the AFR's.

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Old 12-16-2014, 02:38 PM   #3
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Yea I want to do that set up I saw a video on YouTube with a 331 and afr 205 heads


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Old 12-16-2014, 04:07 PM   #4
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Depends on who you talk to.


I love my TW heads.
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Old 12-16-2014, 06:34 PM   #5
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Yeah twisted wedge fan here too. Trickflow is less expensive (depending on what type head) and you can port them to go bigger than AFR heads so it's a win win.


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Old 12-16-2014, 07:24 PM   #6
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205s are a bit big for a 331. It'll make all its power on the top and be very anemic at the bottom. Your T5 will likely grenade before very long behind it.

I'd say go AFR185s on a 331.
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Old 12-16-2014, 08:36 PM   #7
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Afr 185 for a 331?



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Old 12-16-2014, 10:08 PM   #8
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Well what exactly are your goals with the motor and what is the car going to be used for?

Oh, I thought you were dead set on AFRs, re-read the thread. Trick Flow is better.
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Old 12-16-2014, 10:17 PM   #9
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Boom shaka laka.

What is the purpose of this car?

Budget?

Rest of the combo?
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Old 12-16-2014, 10:19 PM   #10
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Trying to run 10 all motor with a 331
It's possible I've seen it happen just don't know what heads to go with


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---------- Post added at 10:19 PM ---------- Previous post was at 10:18 PM ----------

331 stroked
T5 trans
heads ( still don't know witch ones)
Carb intake


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Old 12-16-2014, 10:22 PM   #11
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I'm trying to stay n/a


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Old 12-17-2014, 12:44 PM   #12
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Well what is the rest of the combo? Way more than just heads. You're going to need a relatively agressive combo to do this NA. Probably will need 205s, high compression, you'll want E85 if available and if its going to be a mostly drag car then ditch the manual trans.
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Old 12-17-2014, 02:15 PM   #13
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Will need a decent suspension set up first as hooking up will be your first major hurdle. A good set of rubber also.


Are you going to be full weight or will you put your car on a diet?


There is more to making power than picking the best heads. There is plenty of power locked in the bottom end that only experienced builders can coax out.


A guy I know just put together a little 347 with a Fordstrokers bottom end and some 190 FAC (that were cleaned up and milled to 58cc) and a 650 carb and put down 430 to the wheels thru a manual tranny.


It is about the combination and attention to detail.
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Old 12-17-2014, 03:00 PM   #14
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Yep, one of the best stock block NA motors I've ever seen was a 347 with Victor Jr. heads, carb, real agressive cam and like 12:1 running on the ragged edge of 93 octane. Made I think 457rwhp through a Tremec.
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Old 12-17-2014, 06:21 PM   #15
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Doing a 331/347 stroker build like this with aftermarket heads. Will the car run without a dyno tune for a break in period on the motor?


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Old 12-17-2014, 06:26 PM   #16
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With fuel injection of course. Sorry about that part 😉.


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Old 12-17-2014, 07:03 PM   #17
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Doing a 331/347 stroker build like this with aftermarket heads. Will the car run without a dyno tune for a break in period on the motor?


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Quote:
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With fuel injection of course. Sorry about that part .


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Nope. You get the car to idle and make sure there are no leaks anywhere, shut it down and trailer it to the dyno. Under no circumstances should you be running a $$thousands stroker untuned.
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Old 12-18-2014, 11:29 AM   #18
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Ok.
Gonna be getting my engine and car back soon. Just paranoid about like you said, wrecking a 6thousand plus built motor. Especially having a 1995gt with its computer settings. Gonna take it to DaSilva racing in Pickering,Ontario,Canada. Ended up using those Edelbrock performer heads I discovered off my old engine. An old reputable guy is doing the build and I ended up going with a stroker kit. Taking his sweet time too.
I messed up as well, I wanted new headers for the car while this new build is in the works.. Currently had some old Mac equal length steel/ceramics hard to tell if there's even coating anymore.
Wanted to stick with a shorty header because of my magnaflow x pipe..
So I was thinking I'd stick with equal lengths since I have the wire looms.
Dug up some old thread about the bbks to stay away from them and they showed up today.
Should have just coughed up the extra $ for the frps.
Thanks


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Old 12-18-2014, 11:43 AM   #19
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Old 12-18-2014, 01:19 PM   #20
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BBK equal lengths are a goddamn nightmare to install and do plugs on. Staying with shorties because of a mid pipe is a little silly IMO. Install the longtubes and then have a shop cut and weld the pipe you have to fit. MAC longtubes fit really well on the old 5.0s and tuck up so they are almost touching the floorboards. As much as I talk **** about MAC products, their exhaust stuff is actually pretty good.
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Old 12-18-2014, 03:03 PM   #21
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I would also upgrade to 1-3/4 LT if possible to let that baby breathe.


Unfortunately there is not a one size fits all and strokers require more air and more fuel. So if you wanna make more power you gotta spend mo' money.
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Old 12-18-2014, 08:05 PM   #22
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I'm going to do a 331 stoked with t5 trans and heads a super victor carb and full bolt ons
Planning on pushing around 430
Yes that with drag radials and light rims


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Old 12-18-2014, 08:49 PM   #23
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Quote:
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I'm going to do a 331 stoked with t5 trans and heads a super victor carb and full bolt ons
Planning on pushing around 430
Yes that with drag radials and light rims


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That T5 will last for half a dozen 1/4 runs before shrearing all the teeth off 3rd. You'll need an upgraded trans.
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Old 12-18-2014, 11:14 PM   #24
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Witch one do you recommend?


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Old 12-18-2014, 11:28 PM   #25
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An Astro A5 or an auto with a controller or manual valve body if its going to be a drag car.

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Old 12-19-2014, 11:04 AM   #26
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It's not going to be a drag car
It's going to be my daily driver
I will use to to race but only on the weekends


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Old 12-19-2014, 11:52 AM   #27
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Well you could use it till you lose it but understand that the T5 will eventually be the weak point.
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Old 12-19-2014, 11:57 AM   #28
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So what should I go with
I don't want to pay for the t5 if it going to give up on me after awhike


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Old 12-19-2014, 12:39 PM   #29
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I would also upgrade to 1-3/4 LT if possible to let that baby breathe.


Unfortunately there is not a one size fits all and strokers require more air and more fuel. So if you wanna make more power you gotta spend mo' money.

So I take it that the stock 19lb injectors and fuel pump should be upgraded aswell to have a 331/347 set up properly


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Old 12-19-2014, 02:04 PM   #30
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I have AFR 185cc heads on my 92 331 and I love them. 205s will rip your bottom end out


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Old 12-19-2014, 03:24 PM   #31
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What tranny are your running? If you don't mind me asking?
Are you carbureted?


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Old 12-19-2014, 03:43 PM   #32
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A 255 pump is fine and minimum of 30 lb injectors are what will be needed.


A T5 is a sweet shifting tranny. What Astro does is beef up the internals and shaft so that it can handle the extra power. You could also upgrade to a Tremec TKO but that will never shift as smoothly as a built T5 (I got a TKO and my boy has a Astro T5 behind his turbo 363).
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Old 12-19-2014, 04:20 PM   #33
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I have AFR 185cc heads on my 92 331 and I love them. 205s will rip your bottom end out


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No... the motor will just have a lot of top end and not that much down low. Although the right cam selection can mitigate this.

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A 255 pump is fine and minimum of 30 lb injectors are what will be needed.


A T5 is a sweet shifting tranny. What Astro does is beef up the internals and shaft so that it can handle the extra power. You could also upgrade to a Tremec TKO but that will never shift as smoothly as a built T5 (I got a TKO and my boy has a Astro T5 behind his turbo 363).
I've said it before and I'll say it again, there is no smoother shifting Mustang trans than the T5/A5, period. There is literally no downside to it unless you absolutely HAVE to have a 6 speed ( you don't). Its half the price of a Magnum, half the weight of a magnum, it is a direct replacement for any pushrod and an easily be bolted in behind a Modular/Coyote as well. Gearset is a very good spacing and there are different overdrives available for those who want a "normal" overdrive, super deep overdrive or a road race overdrive.

Only issue I've ever heard of is the ears breaking on the stock T5 cases in real high HP apps and one can use a G-Force case if one is worried about that. Oh, speaking of G-Force... anyone telling you that the G-Force gearsets are the same or as good as the Astro... nope. Astro gears are physically bigger and stronger and its not even close.
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Old 12-19-2014, 06:12 PM   #34
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Street fighter with a B cam. 185cc heads 255lph pump and 30lb injectors.


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Old 12-19-2014, 09:25 PM   #35
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Street fighter with a B cam. 185cc heads 255lph pump and 30lb injectors.


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B cam in a 331 stroker... good advice...

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