What heads work well on a 402?
08-23-2005, 02:55 AM
#21
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.
08-23-2005, 05:57 AM
#23
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I would suggest you talk with either Tony at AFR or Craig at ET Performance. Both are great guys to talk with and really know their ****. The AFR 225 has without a doubt been the out of the box head to beat, but the heads the boys at ET are coming out with have on paper what looks to be the new top dog... time will tell. I don't think you can go wrong with either company.
If you have time to wait, several other new heads will be coming out by next summer. Things will really be heating up in the LSx head market within the next year which can only benefit the customer.
Just my 2 cents.
If you have time to wait, several other new heads will be coming out by next summer. Things will really be heating up in the LSx head market within the next year which can only benefit the customer.
Just my 2 cents.
08-23-2005, 02:07 PM
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Originally Posted by Black8Banger
What is the most powerful cam for the 402 NA?
26x/27x .64x/.64x 112?
With -6.00 cc pistons and AFR 225s would flycutting be needed? Better yet what is the largest cam you can put into the SLP-402 with AFR 225s and NOT need flycutting?
26x/27x .64x/.64x 112?
With -6.00 cc pistons and AFR 225s would flycutting be needed? Better yet what is the largest cam you can put into the SLP-402 with AFR 225s and NOT need flycutting?
I'd bet you could get .700 in there.
08-23-2005, 02:11 PM
#26
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Originally Posted by 1QuickT-A
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.
Last time I checked any 400+ cubic inch setup wasnt cheap, no matter how you build it.
08-23-2005, 02:21 PM
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I have not seen any solid roller cars for decades. however, in the old days, solid rollers were the mainstay.
On these cars, you got a tune up every 12,000 or you were walking. It consisted of plugs, points, filters and a valve lash adjustment. The valve lash adjustment is no big deal but requires you to take the valve covers off.
With our engines this is a PITA....
On these cars, you got a tune up every 12,000 or you were walking. It consisted of plugs, points, filters and a valve lash adjustment. The valve lash adjustment is no big deal but requires you to take the valve covers off.
With our engines this is a PITA....
08-23-2005, 08:21 PM
#28
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With the AFR 225 head you will have plenty of compression with a Flat Top Piston in a 408 due to the larger 4in.
There were ups, now downs, and in the future we may see different options for particular events. Yea, before there were 4" cranks and a multitude of quality head work...there were unpredictable results and possibly no correct answer. Now some new stuff has cleared and out of curiosity. Might want to check what would compliment an all bore or some sort of combination thereof, I would.
Have a good one
08-23-2005, 08:47 PM
#29
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Originally Posted by Brandon
Great numbers yes, but not an all out build. Yeah its nice on pump gas, but why should the guy worry about that when he can bump the compression, run a larger cam, and get more power? If its a weekend warrior like he says, some high octane fuel should be no problem.
Last time I checked any 400+ cubic inch setup wasnt cheap, no matter how you build it.
Last time I checked any 400+ cubic inch setup wasnt cheap, no matter how you build it.
An iron 402 isn't much more than a well built 347.. Especially if you build it yourself. Most guys want dependability and when you start going with huge solid rollers and lots of compression it starts to take the fun out of things cause you are always working on it. He can still run a big cam and 11.5-12.0:1 is plenty of compression. If he's spraying it then he doesnt want to go much higher than that anyways.
IF its gonna be a race motor then I still think a ported set of AFR 225's is plenty of head..