Patriot heads SBC

[milkovich]

Re: Patriot heads SBC

Why should the 406 have more ring wear than a 383?.

The confusion on my part came from Spiff talking about taking a 4" bore block with a 4" stroke I think. The 406 in question is a 4" stroke 406. (Normally when you say "406" we all think of the 400)

I don't have any experience with a 4" bore 406 other then to say it's already a PITA grinding a 350 block for a 3.75 inch stroke crank, I wonder how much pan rail would be left on the 4" stroke version.

Windsors get a way with 408's all the time but they have a 9.5" deck and swallow a 6.2" rod giving it good geometry, the chevy with a 4" stroke and a 5.7" rod you're looking at would have worse angles then a 347 ford which were all the rage before people kept popping them and going to 331's. A 4" stroke and 5.7" rod would even be worse then the factory chevy 400 with the 5.565" rod. You'd have to go to a 6" rod to get mediocre geometry but that's going to push the ring pack WAY up on the piston (only an inch of room). That stack height will probably burn some oil.

I would keep life simple and go with a 383 with 5.7 rods on a 350. If you can't live without at least 400 cubic inches, go to a 4.125 bore block.

[JeffMcKC]

Re: Patriot heads SBC

I believe these heads, and most like them, start to have issues when you lift the valve over .600

They lack in a few other areas but they are better than a stock cast iron piece. These and the Dart Pro ones I would not want to spray they have a weak deck

[Blazerteam]

Re: Patriot heads SBC

Why should the 406 have more ring wear than a 383?.

And those patriot heads looks tempting...i need a set soon for a 406 ;D

[oldsman71]

Re: Patriot heads SBC

ive heard good things about them heads
406's like 5.7 rods
6 inch are a little more of a pain because of clearance

[milner351]

Re: Patriot heads SBC

Sounds like the answer to the original question is - they work pretty good! Thanks BYGDDY for the input... sorry to see the canadian poncho go - but that olds is awesome - and more room for the family!

[1988montecarloss]

Re: Patriot heads SBC

big bore short stroke

how big is a 400 with a 302 crank?

[BYGDDY]

Re: Patriot heads SBC

I ordered them through Jegs, they showed up with giant springs instead of the ones i ordered, called Patriot direct, they shipped me a new set with stickers, a t-shirt and no shipping bill or anything....they went on a stock flat top bottom end, with a comp xe282? cam, air gap, 1" spacer, BG mighty 750, hooker headers, harland sharp rollers, msd everything. The guy i traded cars with is doing a frame off on the car, tub and narrow. He had his "engine" shop dyno the motor, they made some jet changes, left the timing at 36" locked in. It made 477hp at 6300rpm(stock bottom end eep!) and 451 trq at 4g's ish.....Needless to say i was stunned. It worked well in a 4200+ pnd car with a 411 gear but jesus i wish i coulda done it in a 70's Nova or 30's Street Rod.....anyways, that was with the Patriot 195's and i liked em...

[SpiderGearsMan]

Re: Patriot heads SBC

big bore short stroke

[TC]

Re: Patriot heads SBC

TRY THE OLD 400 WITH BEARING SPACERS ON 3.48 STROKE TRICK

The good old 377, kind of like the DZ302's big brother. ;)

[SpiderGearsMan]

Re: Patriot heads SBC

TRY THE OLD 400 WITH BEARING SPACERS ON 3.48 STROKE TRICK

[jays67]

Re: Patriot heads SBC

So yeah or no on the 406 ? I dont know what i want yet. Im kinda kicking it around but thanks for the road recommendation. Can one be built say with 9-9.5:1 comp. ? Am I better off going with a 383? I liked that 408 in that 55
that was in Car craft a while ago too but it looks like a PITA to build. (I should just start another thread)

I love my 406 (and the ones I have that have grown bigger)
the Tq is awsome 400 lbs stock with a junk cam and a 2 bbl
my first one when I was 18 or 19 was a 406 with old 2:02 heads and a decent cam and it was great and 9:5 .1
the newest one we just did is a 406 splayed caps good crank 5.7 rods,afr heads .535ish heads (check would you run this cam thread) and the normal details like a msd dizzy,fluid damper etc... you will like one
and the past 4 I have done run 195* al day in the heat of summer

[nesabo]

Re: Patriot heads SBC

Ya know, a feature on the old man's car (used to be my ride!!) is in order!






The sucker runs purty good.

you have the power, nepotism is OK in this situation. Chad should do one on his dads camaro as well.

Re: Patriot heads SBC

Ya know, a feature on the old man's car (used to be my ride!!) is in order!






The sucker runs purty good.

YES!!!

[58yeoman]

Re: Patriot heads SBC

Thanks for the hi-jack guys! ;D

[Brian Lohnes]

Re: Patriot heads SBC

Ya know, a feature on the old man's car (used to be my ride!!) is in order!






The sucker runs purty good.