Do domed KYB 399’s interfere with 302 cast heads?

-
RustyRatRod said:
That's what I use for my slant sixes.
Click to expand...
Yea and with higher compression the shim gasket isn’t a bad idea for my build I just think it may be too thin for my plans but it’s whatever. Even a 340 sized gasket would be nice I can probably find that maybe. I really want a daily driver with a slant 6 to just leave alone for around town especially if it’s an old aluminum one in a 61 lancer like my first car
 
you keep saying 400~500 horse 318... and then your next breath listing parts directly contradicts that by mentioning the items that would support that claim.

i'll believe it when i see it.

oh, and anybody could build **** like that if all the expensive stuff is free. this sounds like a magazine build with a bunch of made up horse pucky.
 
junkyardhero said:
you keep saying 400~500 horse 318... and then your next breath listing parts directly contradicts that by mentioning the items that would support that claim.

i'll believe it when i see it.

oh, and anybody could build **** like that if all the expensive stuff is free. this sounds like a magazine build with a bunch of made up horse pucky.
Click to expand...
I do machining and porting myself, it’s what I do professionally, and I make headers too. 450 crank from a 318 with heavily ported closed chamber heads and high compression with a 750cfm 4 barrel and am edelbrock dual plane, with a cam is absolutely not a difficult thing, 5.2 liters to put 325-360 rwhp down isn’t an unbelievable task I mean hotrod magazine literally has a walkthrough to make a 400ho 318 with just a couple grand in bolt ons, being able to use some bolt ons, and customize factory parts to work better 450 crank really is not a wild number. 302 fords will do it, 350 Chevys, 340s will do it and it’s the same motor with like 120 thou more width in each bore. It’s not like some crazy number, lighten the crank, polish the rods, do some old school stuff too it helps, full floaters, I did forget to mention valve springs of course.

I pay for every part out of pocket and use my own skills to machine and port the parts. Sorry if it’s cheaper for me because I’m able to use the machinery and have the knowledge and skills to port engines. It’s been my job almost 15 years I have a shelf with over 100 different heads from super cars to pre war cars cut in half l for a skeleton view that I can reference when porting customers cars to the max. It’s what I do, if anyone is able to get some easy power out of an engine it’s someone who’s a professional. All I wanted to know here was if anyone had tried running a certain piston head combo. Idk why all the anger, I’m just having fun building engines and tuning them.
 
i've built many 400hp 318's

i don't see how you make that number with the cam specs you're touting, a dual plane and 750 cfm.

what are heads flowing?

also, i'm calling straight BS on your 1500 budget. unless you're pulling together used parts, which is fine. but don't front about about.
 
waldune said:
You don’t need crazy cams for those numbers, I said at the crank. Anything over 500 lift on intake with that combo has no low end to it so I like to hangout between 474-492 lift on both intake and exhaust, this is probably going to be on the higher end of that number with a longer duration than usual and a bit more overlap than usual to keep dynamic comp. Where I’d like it to be. Always experimenting
Click to expand...


WTF??

Lift kills bottom end?

I can believe a lot of ****, but that can’t be swallowed.
 
junkyardhero said:
you keep saying 400~500 horse 318... and then your next breath listing parts directly contradicts that by mentioning the items that would support that claim.

i'll believe it when i see it.

oh, and anybody could build **** like that if all the expensive stuff is free. this sounds like a magazine build with a bunch of made up horse pucky.
Click to expand...
Apparently 550 hp with the right cam choice :)
 
I have run a 302 head on a 273 with factory dome piston, just had shave down the peak in the combustion chamber or it would hit the piston. A friend runs the 399 piston with a factory head that is cut down to 53cc.
 
What a bullshit bandwidth wasting thread. Why would a "professional" engine builder with all this experience come on here and ask a dumbass question about dome pistons and closed chamber heads. I think this guy is related to the guy who was gonna band saw his 340 pistons and bore the block with a mag drill. Probably the same guy
 
NC Engine Builder said:
What a bullshit bandwidth wasting thread. Why would a "professional" engine builder with all this experience come on here and ask a dumbass question about dome pistons and closed chamber heads. I think this guy is related to the guy who was gonna band saw his 340 pistons and bore the block with a mag drill. Probably the same guy
Click to expand...
or as i like to say: why spend money with a machine shop when i can ruin something for free!

what a maroon
 
How in **** has no one in 3 pages Called this dude out on his nonsense? No chance in hell that 318 with 302s is making “550 crank” or “500 crank” or “450 crank” or any other cockamamie number you can come up with. I hope no one who needs help ever reads this thread.
 
TT5.9mag said:
How in **** has no one in 3 pages Called this dude out on his nonsense? No chance in hell that 318 with 302s is making “550 crank” or “500 crank” or “450 crank” or any other cockamamie number you can come up with. I hope no one who needs help ever reads this thread.
Click to expand...

Because it gets tiring calling bullshit all the time.
 
waldune said:
It’s been my job almost 15 years I have a shelf with over 100 different heads from super cars to pre war cars cut in half l for a skeleton view that I can reference when porting customers cars to the max.
Click to expand...
How much would you charge to port my car. It's pre-war if that helps.
 

NC Engine Builder said:
What a bullshit bandwidth wasting thread. Why would a "professional" engine builder with all this experience come on here and ask a dumbass question about dome pistons and closed chamber heads. I think this guy is related to the guy who was gonna band saw his 340 pistons and bore the block with a mag drill. Probably the same guy
Click to expand...
Stop making perfect sense and being all rational and stuff.
 
waldune said:
Right??? All I wanna know is if they physically interfere with one another. I’m an engine builder by trade for stuff at home I like using a small budget and squeezing orgasm Dr

okay, and anyone who has tried running them or does run them could tell me it’s why I asked here, I’ll call them and ask. The shape of everything mocked up in cad says it should fit and the closest spot is the center of the quench pad on the head which I could grind away. I’d love to get 10+ to 1 dynamic compression out of the motor with cheap mopar heads, I have a good time trying to get 1hp per cube on stock parts only but this is for something specific so can’t go nuts with custom work or forcing the BBD to flow over 300cfm and all that fun stuff haha.

I think they’ll work because the oem high comp 273 pistons don’t contact the 920 heads which are the other set that have a quench pad and smaller calves which is what I want here but they’re just too tough to find with the later intake bolt patterns, 2 years only 66-7. So 302s it is. I don’t think they will contact I was just inquiring if anyone was or had tried, like tbh you hadn’t answered my question in that reply you had a lot of good info but it wasn’t stuff I was looking for I apologize. I work as an engine builder and know mopars very well, however idk all the clearances of every aftermarket part. I may go ask on a 340 forum or 360 forum as the answer should be the same regardless of which one.
Click to expand...
The high compression 273 Pistons were like a wedge top, very crude but ramped, that's why they cleared the closed chamber heads. If the dome is designed for an open chamber, yes.. they will probably have a few interference points.. but you could clearance those points i guess..

Maybe order one piston, if they still sell singles.. and see for yourself... otherwise you already know your answer.
 
The widows peak vs worked.
The pic with the Widows Peak between the two...is from some other website that some other guy did.. and I'll tell you right now he could have ******* opened that port to where it was paper thin but that ledge he left at the closed chamber kills every bit of flow until that valve clears that chamber, even then it's higher lift flow is crippled by it

20220306_181213.jpg


chamber.jpg
 
TT5.9mag said:
How in **** has no one in 3 pages Called this dude out on his nonsense? No chance in hell that 318 with 302s is making “550 crank” or “500 crank” or “450 crank” or any other cockamamie number you can come up with. I hope no one who needs help ever reads this thread.
Click to expand...
man i was on this stinker like white on rice in a snow storm. (#42 54 56)

when he said his budget i knew that he was fibbin'

and then he posted the cam numbers and i figured he wasn't fibbin' he was just smokin' them rocks.
 
You must log in or register to reply here.
-

Similar threads

dibbons
Are Both Valve Reliefs the Same on the Domed TRW L2322F Small Block Piston?
2 3 4
Replies
84
Views
3K
MOPARMAGA
MOPARMAGA
Hellbers
  • Locked
[FOR SALE] 383 .030 domed pistons and rods
Replies
0
Views
580
Hellbers
Hellbers
gagembassett
Info on old TRW domed pistons
Replies
15
Views
7K
NCmtnDWELLER
NCmtnDWELLER
H
Domed area under Side Mirror - Damaged or Intended? - 67 Valiant
Replies
8
Views
726
Harold Wolk
H
9
Domed pistons
Replies
14
Views
2K
AJ/FormS
AJ/FormS
Back
Top Bottom