What heads work well on a 402?
08-21-2005, 09:54 AM
#1
What heads work well on a 402? What are a good set of heads to use on a 402? And what is the largest camshaft on a 112LSA that I can get the most power out of? Just looking for reccomendations for the best combo to build before I start buying stuff.
Thanks guys
Thanks guys
08-21-2005, 10:21 AM
#2
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It depends on what you are doing with the car. Are you staying N/A, going with boost/nitrous, etc.
What will the car see as in drivability? Is it a daily driver? Weekend warrior? Etc.
The cam depends on PtoV clearance, how much dish or valve relief is in the piston, the size/flow of the heads, etc.
Not everyone's "best combo" is the same. Everything is different for every person and their goals for their car.
What will the car see as in drivability? Is it a daily driver? Weekend warrior? Etc.
The cam depends on PtoV clearance, how much dish or valve relief is in the piston, the size/flow of the heads, etc.
Not everyone's "best combo" is the same. Everything is different for every person and their goals for their car.
08-21-2005, 11:52 AM
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Along the lines of a daily driver (or performance?), you want to proportionally increase the size of the cam for the displacement. Same goes for the heads as well, although a 402 certainly moves a lot more air than a 346. I don't know a good rule of thumb, but that would be something to plan for.
08-21-2005, 10:37 PM
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AFR 225's with a custom grind cam.. Something in the 24X/24X duration would be good with well over .600 lift. And a FAST 90/90 of course.
Just my .02
Just my .02
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08-22-2005, 12:12 AM
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Most guys with 402/408 strokers running decent sized cams with AFR 225's are puttin down 500-550hp to the wheels.. So it should be well over 600hp @ the crank..
08-22-2005, 10:30 AM
#9
Originally Posted by 1QuickT-A
Most guys with 402/408 strokers running decent sized cams with AFR 225's are puttin down 500-550hp to the wheels.. So it should be well over 600hp @ the crank..
Thanks for the help 1QTA. 
08-22-2005, 10:54 AM
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If you want max power, look into solid roller, and something over 25x/25x range. There are guys with 26x to 27x and larger @ 0.050. THAT is a big cam.
the 24x range isnt that big, and you can definatly go bigger. Its actually pretty tame...
Solid roller will be your friend for max effort.
1quick, point me to some threads with big powered 225 setups please. I'm not seeing how you are getting the compression with such a large CC chamber. You'd have to run a flattop with alot of relief to run any sizable cam.
the 24x range isnt that big, and you can definatly go bigger. Its actually pretty tame...
Solid roller will be your friend for max effort.
1quick, point me to some threads with big powered 225 setups please. I'm not seeing how you are getting the compression with such a large CC chamber. You'd have to run a flattop with alot of relief to run any sizable cam.
08-22-2005, 04:18 PM
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Where are you driving this car?
If you are using it to get Kentucky fried rat at the local drive-in consider a smaller cam that will idle and run on pump gas.
If you are using it to get Kentucky fried rat at the local drive-in consider a smaller cam that will idle and run on pump gas.
08-22-2005, 05:03 PM
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Originally Posted by robertbartsch
Where are you driving this car?
If you are using it to get Kentucky fried rat at the local drive-in consider a smaller cam that will idle and run on pump gas.
If you are using it to get Kentucky fried rat at the local drive-in consider a smaller cam that will idle and run on pump gas.
08-22-2005, 05:06 PM
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Originally Posted by robertbartsch
Where are you driving this car?
If you are using it to get Kentucky fried rat at the local drive-in consider a smaller cam that will idle and run on pump gas.
If you are using it to get Kentucky fried rat at the local drive-in consider a smaller cam that will idle and run on pump gas.
Need a cam with a large amount of overlap to cover up the smell...
Or just have it idle really rich
j/k
08-22-2005, 06:13 PM
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my motor is just about done it's a 408 with AFR225's and a 253/257 112lsa with .642- 646 lift . So if you would like i'll get in touch with you in about 3 weeks or so and tell ya how it is 
BTW this is not a solid roller cam
BTW this is not a solid roller cam
08-22-2005, 10:00 PM
#15
By the time the motor is built the car will be used mainly for drag racing and the occasional blast through the corn fields. 
If I get in the mood for some original recipe rat, I'll park it...but I probably wont be using it for munchie runs.
What do I give up with a solid roller? More maintenance? Whats the maintenance like on a solid roller? What is the benefit to going with a solid roller?
And lastly, is it worth the extra money for an LS2 block? How much weight do you gain with an LQ9? The iron block is better if I decide to spray in the future?
DestroyerSS...gimme a PM when your motor is done. I'm interested in seeing how it performs
Thanks guys
If I get in the mood for some original recipe rat, I'll park it...but I probably wont be using it for munchie runs. What do I give up with a solid roller? More maintenance? Whats the maintenance like on a solid roller? What is the benefit to going with a solid roller?
And lastly, is it worth the extra money for an LS2 block? How much weight do you gain with an LQ9? The iron block is better if I decide to spray in the future?
DestroyerSS...gimme a PM when your motor is done. I'm interested in seeing how it performs
Thanks guys
08-22-2005, 10:09 PM
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Originally Posted by Brandon
1quick, point me to some threads with big powered 225 setups please. I'm not seeing how you are getting the compression with such a large CC chamber. You'd have to run a flattop with alot of relief to run any sizable cam.
08-22-2005, 10:32 PM
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Originally Posted by Brandon
1quick, point me to some threads with big powered 225 setups please. I'm not seeing how you are getting the compression with such a large CC chamber. You'd have to run a flattop with alot of relief to run any sizable cam.
Check post #3, #6, #25, #30... Those are just a few of PLENTY..
https://ls1tech.com/forums/showthrea...th+AFR+225%27s
Theres another.. 500+ with out of the box AFR's thru cats..
08-22-2005, 11:03 PM
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I stand corrected. I was entering some numbers wrong with my calculations.
72ccs with a .040 cometic, pistons .010 outa the hole, with a 2cc valve relief is 11.4ish
Still dont think its the IDEAL setup for a wild N/A combo.
72ccs with a .040 cometic, pistons .010 outa the hole, with a 2cc valve relief is 11.4ish
Still dont think its the IDEAL setup for a wild N/A combo.
08-22-2005, 11:09 PM
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Originally Posted by Brandon
I stand corrected. I was entering some numbers wrong with my calculations.
72ccs with a .040 cometic, pistons .010 outa the hole, with a 2cc valve relief is 11.4ish
Still dont think its the IDEAL setup for a wild N/A combo.
72ccs with a .040 cometic, pistons .010 outa the hole, with a 2cc valve relief is 11.4ish
Still dont think its the IDEAL setup for a wild N/A combo.
Well what exactly would you recommend without spending a ton of money?? Most of the guys on this board are not going for "wild".. But, 550rwhp with a set of out of the box heads is pretty damn impressive where I come from and that is more than enough for most people.
08-23-2005, 01:27 AM
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Something like TEA would be perfect. If you have an opportunity to talk to them, transfer information about the engine and any previously planned modifications. It should be easy to discuss however complicated the characteristics are, but I believe a custom set of heads would be awesome and wouldn't require a lot of extra preparation and/or transfer time.