My 351W heads...whatcha think?

[85_SS_302_Coupe]

Rather than hijack the C60E thread, i figured i'd post my own. Mine are '69 C90E 351W heads with 1.94/1.60 valves and a port job. They'll be going on my car after a rebuild and a cam swap. I'm getting mixed reactions...some people say they're a waste of time and that i should get aftermarket heads (because ya know, everyone has money coming out their ass) but then others are saying they look like they've got a serious port job and should be worth more than GT40Ps, which is good enough for me right now with just a rebuilt 302.

This site Cast Iron Heads says that with a "stage 3 port job" and the valves that i have in them, they should flow 225cfm @ .500 lift...not bad for 40 year old technology huh? I'm thinking of pairing them with my Vic. Jr intake and an X cam or TFS Stage1, although i haven't ruled out just getting a custom cam.

 

[z2o_what]

i got a set of d0oe 351 heads a couple weeks ago that im prolly gonna put on my engine after i get the pistons cut.

i got a good deal on them: $45. the guy i got them from paid $250 for them last year. (it pays to have friends with drug problems). i had to reseat the valves and clean em up.

 

[Woodrow]

Only one way to find out, put them on a flow bench. Some dumbass who didnt know what they were doing could have gone in there and hogged it out rather than doing a decent port job.

 

[85_SS_302_Coupe]

Only one way to find out, put them on a flow bench. Some dumbass who didnt know what they were doing could have gone in there and hogged it out rather than doing a decent port job.

Yeah i feared that too...the only comfort i have in that so far is that every runner looks even as far in as i can see and they're smooth...i don't think the average idiot would be accurate enough to match the runners with eachother but who knows. Iron heads are a PITA to port.

 

[Mavrick]

I've read that they will perform similare to GT40 heads. This is how all the old timers made power on a budget, back in the day.

 

[Modular2v]

wow . . . look exactly like the c9 heads on my 331. But mine have been milled to hell and my exhaust valve is a little bigger

 

[Modular2v]

by the way ....i think you are doing the right thing by using these heads(yes im a little biased) but for good reason. I do not have the money to drop on a set of 1500$afrs . I know that these heads are not optimal for my 331 but someday down the road i will have the money, until then im having fun with my car and im glad to see you doing the same

 

[85_SS_302_Coupe]

by the way ....i think you are doing the right thing by using these heads(yes im a little biased) but for good reason. I do not have the money to drop on a set of 1500$afrs . I know that these heads are not optimal for my 331 but someday down the road i will have the money, until then im having fun with my car and im glad to see you doing the same

Exactly! There's a deal that's kinda maybe sortof almost in the works with this guy who wants my work truck for a set of Holly Systemax heads/intake....if that happens (I doubt it) then hell yeah i'm all over it...but as for buying them, it's just not in my budget any time soon. Before i get that serious with my car i'm gonna work on it's looks finally. I've done a lot with my car in the time i've had it but i've done pretty much all of it on a shoestring budget except for the drivetrain because i can't stand screwing around with busted up transmissions.

I can't stand it when people say it's a waste of time and that i should get aluminum heads....if they're gonna buy'em for me then bring it on! Right now i'm using wore out e5's so how can this be a bad swap?? Hell if i pick up 20hp i'll be happy, but i'm betting more quite a bit more

 

[1fastsn95]

I knew a guy with those heads, Lunati cam, edelbrock intake and the usual bolt ons on a92 convert. I cant remember what the car ran, but he put a 351 in it and the 302 ran better with that combo. Car pulled hard all through the gears. Hope yours does well also!

 

[795.0pacecar]

Talk to hissing cobra. He and his brother have similar combos except his brother has ported 69 I think, 351 heads and he has AFR 185s. His brothers combo made a little more power.

 

[85_SS_302_Coupe]

Talk to hissing cobra. He and his brother have similar combos except his brother has ported 69 I think, 351 heads and he has AFR 185s. His brothers combo made a little more power.

Well i don't know if this is the case, but if you hypothetically take 2 sets of heads with idential builds....basically cast the exact same set of heads, one set in aluminum and one set in iron....they both flow exactly the same and you put them on the exact engine build, the iron heads will make slightly more power because they absorb less heat from the cylinders than the aluminum heads do....and that robs the engine of power because you actually want a lot of heat in the cylinders. It's marginal at best but it's a fact.

 

[Hissing Cobra]

With a nice cam, intake, carb and exhaust, you could make over 300 rear wheel horsepower with those heads AND run in the low to mid 12's @ 108-110 mph. How do I know? My brother ran those heads on his car for the past 9 years and that's what he was making for power and running in the quarter mile (he's since built himself a 336 stroker engine that makes 390 rwhp and now runs 11's.)

Our engines were set up identicle, with the exception of the camshafts and heads. He installed a camshaft in my engine that was one size larger than his and AFR 185's (58 cc's) were chosen so that he wouldn't have to spend countless hours porting a pair of heads for me. You would think that I would make more power, right? Think again!

On the dyno, he made 311 rwhp (@ 6,300 rpms) and 287 rwt (@ 4,400 rpms). My engine made 307 rwhp (@ 6,400 rpms) and 278 rwt (@ 4,400 rpms). At the track, he ran a best of 12.49 @ 110 while I ran a 12.42 @ 109.

If the combo is built right, an iron headed engine can hold it's own against an aluminum headed engine, and that's a FACT.

 

[85_SS_302_Coupe]

With a nice cam, intake, carb and exhaust, you could make over 300 rear wheel horsepower with those heads AND run in the low to mid 12's @ 108-110 mph. How do I know? My brother ran those heads on his car for the past 9 years and that's what he was making for power and running in the quarter mile (he's since built himself a 336 stroker engine that makes 390 rwhp and now runs 11's.)

Our engines were set up identicle, with the exception of the camshafts and heads. He installed a camshaft in my engine that was one size larger than his and AFR 185's (58 cc's) were chosen so that he wouldn't have to spend countless hours porting a pair of heads for me. You would think that I would make more power, right? Think again!

On the dyno, he made 311 rwhp (@ 6,300 rpms) and 287 rwt (@ 4,400 rpms). My engine made 307 rwhp (@ 6,400 rpms) and 278 rwt (@ 4,400 rpms). At the track, he ran a best of 12.49 @ 110 while I ran a 12.42 @ 109.

If the combo is built right, an iron headed engine can hold it's own against an aluminum headed engine, and that's a FACT.

Now that's reassuring...what's his short block like? Is it just a 302 or was that stroked to something? Compression? Cam specs? Intake/carb? Hell what's his engine made of?? LOL.

 

[R2D2]

Our engines were set up identicle, with the exception of the camshafts and heads.

theres your difference, the setups are no where near identical. Back to back to back dyno pulls with an afr 185 vs the old D0's will show an increase of much more than you guys had.

 

[Boss 351]

Worth it, yeah!

I just bought the same thing... The much heavier 95GT AODE the heads were installed on prior ran in the mid 13's so yeah they can be pretty good. Mine also have 1.94/1.6 valves and a pretty decent port job

 

[Modular2v]

With a nice cam, intake, carb and exhaust, you could make over 300 rear wheel horsepower with those heads AND run in the low to mid 12's @ 108-110 mph. How do I know? My brother ran those heads on his car for the past 9 years and that's what he was making for power and running in the quarter mile (he's since built himself a 336 stroker engine that makes 390 rwhp and now runs 11's.)

Our engines were set up identicle, with the exception of the camshafts and heads. He installed a camshaft in my engine that was one size larger than his and AFR 185's (58 cc's) were chosen so that he wouldn't have to spend countless hours porting a pair of heads for me. You would think that I would make more power, right? Think again!

On the dyno, he made 311 rwhp (@ 6,300 rpms) and 287 rwt (@ 4,400 rpms). My engine made 307 rwhp (@ 6,400 rpms) and 278 rwt (@ 4,400 rpms). At the track, he ran a best of 12.49 @ 110 while I ran a 12.42 @ 109.

If the combo is built right, an iron headed engine can hold it's own against an aluminum headed engine, and that's a FACT.

wow this could not be any more true! my combo is hard, solid proof of this statement! VERY well put sir

 

[Boss 351]

Dammit I wish the season wasn't over

 

[Modular2v]

Dammit I wish the season wasn't over

its not yet

 

[tmoss]

we can't see the work done in the most important areas - the bowl and the pushrod pinch.

Pull an intake valve, light it from the chamber side and take a good in-focus pic from the intake runner and maybe we can tell ya more..............

 

[85_SS_302_Coupe]

we can't see the work done in the most important areas - the bowl and the pushrod pinch.

Pull an intake valve, light it from the chamber side and take a good in-focus pic from the intake runner and maybe we can tell ya more..............

Wow that's a lot harder than it sounds even with a good camera and an LED light! But i think i got some decent shots.