Noaht4

Kfxguy

iTrader: (1)

GM fast burn heads work very well.

biketopia

iTrader: (5)

Yup, essentially an aluminum version of the cast iron vortec's. Also check out blueprint, we've put both their offerings on a few different set up's and they performed very well.

Kfxguy

iTrader: (1)

biketopia

iTrader: (5)

Correct, i kinda put my foot in my mouth right after I posted that. Spend a lot of time looking at heads this bast December at PRI. Honestly though, for the price I would strongly suggest looking into a set of blue print H8002k's They come assembled, vortec and standard intake compatible, out flow the fast burns, pretty sure the fast burns have a raised exhaust port as well which can make header fitment a bitch. The slightly smaller runner will help keep intake velocity up and the 64cc chamber should keep you pump gas safe as well. For $900 bucks for the pair, they are hard to beat. We put a set on a little 355 in a chevy luv and hit it with a 100 shot, thing ran great.

https://blueprintengines.com/product...sembled-h8002k

or if OP want's to just blow his whole budget just get a set of AFR or Brodix 195's. They'll perform EXTREMELY well and take up all your 1400 bucks haha. I was going to use a set of fast burns but the guy I was trying to buy them from in Florida was being a donkey and wanted me

Kfxguy

iTrader: (1)

Yea, i remember i had to raise the intake runners and slot the header bolt holes and weld a tack at the top of the holes to keep the headers up higher. The engine was in a third gen daily driven camaro that was not stripped down and still had ac. It ran 11.40's at 122mph back in the day. on nitto 555r tires and had like a 1.9-2.0 60ft lol. it would have gone in the 10's on drag wheels and tires. I think it trapped 92ish in the 1/8 so it shows it pulled hard up top when it hooked up.

biketopia

iTrader: (5)

Damn, strong running little car haha

NewEnglandFormula

Fast355

For less than your budget, I have a set of Assault Racing 205cc heads that now have dual springs, guide plates, 2.02/1.60 valves and were ported by Lloyd Elliot. I had them flowed both assembled with out of the box parts as well as after Lloyd's port work and valve job. Lloyd also reworked the chamber and milled them 0.020" which put them right at 62cc.

Assault Racing 205cc bare castings from Amazon
Competition Products Head Improvement kit with 2.02/1.60" .100" longer valves and dual springs
Competition Products Adjustable Guide Plates
Comp Cams Spring Seats
ARP 7/16" screw in studs
Ported, Milled, & Valve job by LLoyd Elliot.

I think if you used the standard head improvement kit with standard length valves and a single spring you would be cheaper. Just have a good valve job done on them and run them. With the 1.7 rocker and roller cam I am running being .580" lift on both there is a much more pronounced improvement for my setup from the porting/valve job. Compared to out of the box with your .500" lift the improvements are much less drastic there.

BEFORE PORTING
LIFT------INTAKE-----EXHAUST
.200----------135-------103
.300----------183-------131
.400----------225-------150
.500----------244-------164
.600----------241-------175
.700----------241-------177

AFTER PORTING
LIFT------INTAKE-----EXHAUST
.200----------138-------107
.300----------192-------138
.400----------241-------164
.500----------274-------183
.600----------291-------193
.700----------295-------199

Noaht4

biketopia

iTrader: (5)

They are great heads for the money, I don't think you will be disappointed!!

TT427

iTrader: (1)

cam406406

iTrader: (1)

Dart pro 1 heads!

Fast355

Fairly certain that is what the Assault heads are based off of.

Kfxguy

iTrader: (1)

Dude you can do whatever you want. It’s your money. But I tried fatty 2 sportsman’s. Ported. Then dart pro 1’s. Ported. Afr 195’s. Even trick flow R’s. None of them made the car as fast as the fast burn heads. Like I said. Do what you like, but I had the fastest street car around here back around 97,98,99ish. Car was trapping 122+ on wore out 555r’s with a 2.0 60ft. It was a legit 10 second daily driven, all motor, no nitrous (well I had it as insurance) full interior with power everything and ac. I had 11.5 to 1 compression. Ran pump 93. 6” rod 383. It would limp on 87 if I turned the timing down. It liked 27-29 degrees on 93. I hsd a **** on the dash to back the timing down a few degrees if I couldn’t afford (I was a broke *** kid trying to go fast) 93.

You ever notice how a ls motor makes good power so easily? Well a good bit of it has to do with the compression you can run and the combustion chamber. The fast burn heads were ahead of their time. Of course the ls heads flow very well but so do the fastburns. But it’s not all about overall flow. You can have a head that makes good flow numbers but don’t make power for ****. Velocity and efficiency play a part in the equation. And in my opinion, gm got it right with the fast burn heads.

Let me tell you you something I did. I hate admitting this too.....

i broke the crank in that motor. So I had to start over. So I figured go bigger and better and badder in every way. Except cubic inches.
Original motor was:
383 cubic inch
fast burn heads
comp 230/244 on a 114 with solid roller lifters on it.
6” eagle sir rods
cast eagle crank
canton oil pan
srp flat tops.
Car ran 11.40’s trapping 122


new motor
383
trick flow r heads ported, flowed 300.3 on intake at .700 227 on exhaust
comp 242/248 114 lobe seperation solid roller (reused lifters)
scat h beam 6” rods
scat forged crank
same srp pistons
same canton oil pan

car ran 11.60@120

MORE Cam, MORE head flow, less power. It even did not rev as high. It stopped pulling at 6800-7000 whereas the original setup pulled hard to 7800. Yea. I said it, 7800rpm out of a stroker. I have Dyno graphs to prove it.


But but like I said. Do whatever you want.

TT427

iTrader: (1)

More cam and flow but less RPM... ? Clearly a problem somewhere or a combination of problems, valve float, shyt exhaust setup? especially for lack of I/E spread? You went from 14 degree spread to 4 almost none but took on way more intake duration. How you getting the extra out?

Kfxguy

iTrader: (1)

same 1 5/8 full length headers. Same single 4” exhaust. Extra air? Well theoretically it should have been extra air but if it was an exhaust restriction, it should have gone at least the same mph. My simple explanation is the trick flow r might flow more ON A FLOW BENCH but I’d put money on it that in the real world, ON THE ENGINE, they didn’t flow as well and didn’t fill the cylinders as well. I added a good bit of valve spring to it too. Could have been a cylinder shrouding issue, 2.10/1.60 valves vs 2.0/1.56 valves. The simple true is, bigger ain’t always better. Flow numbers aren’t everything.

TT427

iTrader: (1)

How you going to give advice with mismatched shyt like that? Retarded valve size for bore and small *** headers no I/E spread? FIX the combination, no THEORY suggest it should run the same with all the mismatched bs let alone on a different day. You have no clue whats going on, and till you get it to rpm the same or higher it wont run the same. You spin it high with the first combo, put bigger donkey dick cam in (that probably could use even more compression and converter?) and fall short 800-1000pm. So let me get this straight, you kill midrange torque with a huge cam and lose 800-1000 rpm yet still run within .20 lol and claim they are better heads? Just lol. Im done, blind can lead the blind IDGAF.

Kfxguy

iTrader: (1)

do you have any idea how stupid you sound trying to nit pick a combo I had 20 years ago? Are you serious? The car ran its *** off with both combos. And I was a kid at the time, and had a daily driven 10 second car. I forgot to add that I did run the car once on et drags and it ran 10.87@ 126mph. But whatever dude. I had both combos and the original one was faster. The second combo had more tq. Also, I changed the stall. A 242/248 isn’t a donkey cam in a 383 sbc. More to it than head flow and if you have half a brain, you’d know that that. I’d put my money on fast burn heads before any other sbc head, for a street/strip application.

Pwebbz28

iTrader: (31)

what headers were you running?