New SCJ heads on a 429

Well Im feeling pretty good My wife just bought me a bare set of the New SCJ's From Lem !! These old Procomps are fixin to be a thing of the past !! So Question for ya'll I just got a little 429 with the old wiesco dome's and I've ran a best untuned 11.90 @113.76 and I think I can get it a few tenths faster, You thnk these heads are over kill for the little motor? and do you think they may be worth 75-100 hp over the pro comps ? heres a picture of the pistons not sure what the compression will end up at
Heres what I got
429 Wiesco domes
ProComps 93cc Flow-253@600/193@600
.258/.260@.050 .640/.640
H beams
Stock Victor 4150
850 holley

Shane they will not work on that engine without a piston Change, the valve reliefs are different on the SCJ and the factory pistons....


Randy

Hmm..ya dont think we could cut for new relief's ?

You will not need an exh relief...but a new intake relief . You need you rub on that dome also ....it's solid I assume ?

Gerald Brand can cut 'um, its one of those if your gonna pull it that far down deals..............460 crank, diff piston.........I think you have H-beams anyway.

Rollcage time.

Dam boy, sounds like you need a 4.5" crank, 6.8" rods and a set of pistons.

I've got a 4.5" crank full of mallory if you decide to upgrade.

Also got a 460 crank that needs .010/.010 for free if you want.

Greg

you will have to remove some of the domes and hope they are not Hollow domes. some of the TRW pistons are hollow domes...



Randy

Shane has a 4.5 crank. I mentioned the "stick the heads under the bed" and save up for the parts to put the stroker together.

Truth is thats more motor than the car needs right now. We'll get a cage in it, suspension etc and go from there.

The cheap and sensible deal would be to pull the 429 down, pull the valvetrain from the procomps and stuff in the scj heads, notch the pistons, put it together and go race.

The whole having the car apart thing for another year while everyone else goes racing sucks.


I told the wife I want some A460 heads from Santa, doubt I'm as lucky as Shane is lol.

Shane let me check stock here I may have a set of Factory 429 SCJ/CJ pistons.... you have my Cell I will let you know later if I do.....



Randy

richter69 wrote:Shane has a 4.5 crank. I mentioned the "stick the heads under the bed" and save up for the parts to put the stroker together.

Truth is thats more motor than the car needs right now. We'll get a cage in it, suspension etc and go from there.

The cheap and sensible deal would be to pull the 429 down, pull the valvetrain from the procomps and stuff in the scj heads, notch the pistons, put it together and go race.

The whole having the car apart thing for another year while everyone else goes racing sucks.


I told the wife I want some A460 heads from Santa, doubt I'm as lucky as Shane is lol.

That was kinda what I was wanting to do.. I have a .040 460 on the engine stand with hyperutectic pistons that I could change out to forged in the mean time but I was kinda wanting to run the 429 just to see what the little motor does with good heads.
I dont remember if the domes in it are solid, if you were looking at the pistins fron the bottom you couldnt see the dome. Would that mean they were solid ? also what kind of rubbing would need to be done to the domes ? Is it just so it would fit the combustion chamber ?

yes shane it is just so it would fit the combustion chambers the SCJ valve notches have to be installed also, other than that get it man.....


Randy

Ok guys so..If I was to get some 460 pistons when I get some more money, what one should I look for to compliment my combo I'm not against compression