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stroker mike

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So, as I have stated before here I have a 318 with 340 J heads, it was this way when I bought the car, so I don't know what all may have been done to them, but I do understand the concept of port velocity somewhat, and I have the chance to buy some 302 heads from a san jose local that post's around these sites pretty often, and I can get a good stage one port job for 125 bucks, and I was considering buying the heads and having the work done, since my car is a street car, and I'd be able to raise compression and leave my tranny combo alone. I have an A999 with wide ratio gearset, and 2000-2200 stall factory cop car converter. The 220/228 solid I am buying would not be adversely effected I don't think, and with a quality port job I'd still have a decent top end, don't you think? My question is, those 302 heads are "swirl port" heads, right? They have the heart shaped combustion chambers, I think they are like 60 cc's, if I had them ported will that ruin them? The swill effect, I mean. Would I defeat my purposes to go through this when I could just run the J's and leave that alone? I'd be afraid to port the j's for fear that my small cubes couldn't use them. What do you guys thinkl?
 
ya and i think i know what head guy ur talking bout he offers three stages of porting i might use him not sure but if your heads come out cool then i might consider him
 
but these heads will work good and the bigger the cam the better the heads will work and if you port them these heads should be pretty good
 
If you are going for mild street performance, the 302’s are great. If you think you will want more street/strip performance, forget the 302’s because they just don’t flow well enough to make big power.

The 318 I had years ago ran a little over a half second faster with my ported J heads, compared to my ported 302’s…but the 302’s were much more “driver friendly” due to the better low end torque.

If it were me, I would save the money that was earmarked for the port job (maybe for some nice heads).
 
DusterBoy15 said:
but these heads will work good and the bigger the cam the better the heads will work and if you port them these heads should be pretty good
Click to expand...

Don’t get pulled into the “bigger is better” hole, its painful to climb back out. Those heads are made to make good low end torque, not high end horse power…and bigger cams move the torque curve up the RPM band…does it make sence?
 
what im saying is tha tif you ever went with a bigger cam these heads would help because of the port velocity but these heads are the best bang for your buck higer compression and can still run 87 and with the porting even better all you need him to do is make the ports the size of the 360 and your good but what ever else is a plus
 
I don’t know if you have seen the size of the 302’s intake ports, but I literally can’t put my thumb in there because they are so skinny…this is where your high port velocity comes from. On the other side of that coin; due to those small ports, big cams suffer greatly because the heads can’t support the volume of air that the cam is capable of moving (making your car a dog). The 302’s are NOT made for making big power. They ARE made for efficiency, and good torque. This is why you should pick the right heads to go with your combo (and power expectations).
 
i have a set of 302 heads so i do know what they look like if he ports them to the size of the 360 im sure you can fit your thumb in there.
 
well, frankly, I want to raise my cr and improve port velocity if I can but not if I gotta go thru too much, if I have to port them out too much I may as well just have the J heads ported and mill them down .040 or so to get my cr up to par, and I'd have to have the intake done as well. But for the money, that may be the most cost effective route to run. The thing that just sent me sideways was the add I got from Doug Herbert's that advertized a blowout on Eddie heads, the price is coming down, that's for sure, and that would be a really great purchase. Maybe patience is the key here once again, although I swear that's a four letter word.
 
but even the eldy heads are bad as if i remember correctly wont help compression the 302s are good talk to BRJ and he will help you more then anyone


and you dont have to port them much jsut get the stage one done which im sure is gasket match and have him match the 360 ports and your set and if you mill your J heads to work on the 318 how are you going to use them on the 408 or something you were talking bout
 
i feel like im talking to me haha =)

"The only thing that I could see that he would have to change later is the heads and not go straight to Eddys to start with, as I think that they would be way down the road for him as he's on a limited budget. And also that the engine isn't going to be turned over 5500 anyway, at this point the eddys would be over kill and not much help with the power. Iron heads are his best bet for now, and being that he has the 318 heads I would use them to help him save money for other things that he's going to need"


thats from BJR he was talking bout me using the 302 heads on a stock motor the eldys would be over kill and the 302s are good. specially with the stock motor and al lyou have to do is use a small port intake and you good

i would be running this setup on my 318 if i dident have this 360
 
StrokerMike, I'm attaching link to the buildup you are speaking of. Pay close attention to the last two paragraphs of the article. I just installed a set of 302 heads to my 318, as well as a Compcam XE268 with springs, timing chain&gear, etc.. I had originally purchased a freshened set of 915 J heads ready to bolt on, but after doing considerable research for over three months, and reading this article and talking to people in the know, I switched off to the 302s. Contrary to Flyfish's results, each and every person I spoke with said to go with either the 302s or magnums. Most thinking is that the port velosity of the 302s with some mild porting(gasket match,etc) will outflow and perform better than the larger port 360 type heads, and this improvement will be where you need it most, bottom end up thru the high 5s. If you plan to run constantly higher rpms than that, up in the high sixes plus, you really should consider another block other than the 318. Check this link. Proof is in the pudding. JMO, Mike
http://www.geocities.com/alwest_83/318?200721
 
In the second paragraph, the last two sentences confirm what I have been attempting to convey to Dusterboy.

“The #302 swirl port castings are the best choice for a mild 318 buildup if you are having them ported. If you are going the un-ported route, go with the 360 heads but have them milled.”

The operative word here is MILD…my only point to this rant was to inform folks that if you are looking for BIG power, then save your money because 302’s are for MILD street performance and trucks.

I case you are interested; this was my old 318 combo to the best of my memory:

67 Barracuda, 318, 302 heads, MP 284/.484 cam, RPM manifold, 650 dp, 1 5/8 headers, 727, 3500 stall, 8 ¾ w/ 3.55 gears. 14.6-14.5 @ 100.

Same as above except with ported J heads: 13.9 @ 105.

All runs were at Bandimere Speedway, Denver CO 5800 feet above sea level.

FWIW, current combo is similar except with a 360:
Same car, Eddy heads, MP 292/.509 cam, Air Gap, 750 dp, 1 ¾ headers, 727, 3500 stall, 8 ¾ w/ 4.10 gears. Best to date, 10.97 at 123 MPH.

I forgot to mention one VERY important factor! All of these runs were on a 150 shot of my favorite oxidizer…That might be why my engine favored the larger ports. But running on the motor, the difference was still about a half second between the 302’s and the J’s… et’s were in the mid 15 to low 16 second range on the motor.

car0009-1.JPG
 
flyfish said:
In the second paragraph, the last two sentences confirm what I have been attempting to convey to Dusterboy.

“The #302 swirl port castings are the best choice for a mild 318 buildup if you are having them ported. If you are going the un-ported route, go with the 360 heads but have them milled.”

The operative word here is MILD…my only point to this rant was to inform folks that if you are looking for BIG power, then save your money because 302’s are for MILD street performance and trucks. [QUOTE/]

Mild, key word. IMO, after a cam off 224 @ .050, I think a head change would show an increase of power and track et.
Click to expand...
 
correct guys for a mild build is all he is wanting for now becasue if i remember correctly he is going to build a bigger motor later on and put it in
 
We run 302's and 274 @ .050, 360 .030 and dished w/10.8 cc's 850 cfm's, flow 218 on the intake and runs low to mid 11's, 1/8 mile 1.57 7.303 94.783 which is equal to the times that I said, as we also run a 274 @ .050 cam so maybe were wrong but were winning.
 
So, I do intend to build another motor, but that won't even begin till I've got this one where I want it. I don't intend for it to be Mild, I would say my goal is 350+ horses, I have a 220/228 solid cam on the way, with just under 500 lift, on a 112 LSA, I will probably be using the rpm air gap manifold, roller rockers, jacobs ignition and nitrous mastermind, and etc.-- I intend to make it as fast as I can while still being able to drive every day in silicon valley traffic.-- I have considered the M1 single plain as well because of the nitrous, but as for eddie heads, they would be a superb compliment to the setup, my cr would hit 9.2:1 and they'd flow like hell on the top end, but still be drivable. I will be sticking with iron, though cause I just can't afford aluminum right now. My 9 year old needs braces, know what I mean? With a 2.75 first gear, 3.91's and 28" tires I could easily hit a 12 in a 3000 pound cuda fastback on the squeeze, With The Right Heads! BJR, you obviously favor the 302's and I truly admire the work on your entry this year, so I intend to listen to you now.:cheers:
 
and you can always sell the 302 heads when your done with them as im sure some one will always want a piar of them
 
Glad your listening Mike. I did tell you in another forum to tal;k to BJR.
Also, there is a fella here running 11's on hs 318. In a MoPar mag.
Ring a bell?
 
nvm bout what i posted some one on mopar tech talked to mike and said the J heads are what he should use o well peoples opinions differ
 
BJR Racing said:
We run 302's and 274 @ .050, 360 .030 and dished w/10.8 cc's 850 cfm's, flow 218 on the intake and runs low to mid 11's, 1/8 mile 1.57 7.303 94.783 which is equal to the times that I said, as we also run a 274 @ .050 cam so maybe were wrong but were winning.
Click to expand...

Just curious, but what does the car weigh? Judging from the MONSTER cam and flow of the heads (218 cfm), I’d say you have pretty much maxed out the potential of those heads. Kudos to you, not many folks can squeeze out the full potential of the heads on their motor.

This reminds me of a guy that broke the state bench press record years ago. He was immediately greeted by a guy that claimed he had benched 100 lbs more than him in his basement….

The moral of this story…

There will ALWAYS be someone offering advice that is stronger, faster, smarter, better looking, bla bla bla. Sift through the stories and get the relevant data that pertains to your situation. Be diligent, do your research, gather as much information as possible and make a decision based on what facts you have attained. As long as you are well informed, you should make the right decision…which (IMHO) considering your mild build (no offence Mike, but I consider 350 hp to be mild) the 302’s should be fine; but I still wouldn’t spend extra $ to port them...that’s just MHO.
 
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