project89

iTrader: (1)

he guys i just wanted to update my heads flowed 268cfm out of the box @ .600
numbers across the board were slightly higher then advertised , they have been cleaned up just a tiny bit now and should be closer to 290 cfm but now that there bolted to the engine i am not sending them back out

FtrSpeedy

I just picked up a set after chattin with my machine guy. He just got done doin minor port work on a set for his buddy and they flowed 300cfm and he said there was alot more to be gained. His thoughts on the guide issues a few people had was from improper guide installation, which i had that on a set of stock heads.
Oh and the sales guy at kmj did say a standard intake will not work, but an raised runner intake such as a air-gap intake should work.

project89

iTrader: (1)

we didnt port mine at all just a real minor cleanup ,, lil more time spent on them and they would deff do over 300 cfm..

same thing here with the guides i had a set of worked 882's that came on my original engine that had the new bronze guides installed improperly and they are well beyond worn out at just under 4k miles

TennesseeIroc-Z

iTrader: (7)

Looking at these heads, tryn to make a plan. Quick question-

Are you guys running standard length valves or +.100's, and at what installed height on your valve springs?

My cam needs a 1.85" installed height to run my 1.6's, was wondering how the pocket was with these heads in stock form.

project89

iTrader: (1)

oh man i dont rember what mine were but i had to use +100 valves , i wanna say the whole package i bought came in at 1.800 installed hieght and was good for .625 lift

project89

iTrader: (1)

one more update guys a standard hsr intake instead of the vortec version also works on these heads but does require a lil bit of porting for a good match

i should be ready to fire the engine in about 2 weeks time so after break-in i can update with some performance results

project89

iTrader: (1)

haha its been a while , but i had some issues with the rest of the car i needed to take care of before i could get this fired up and broken in

if u do get these heads do urself a favor and buy adjustable guide plates , standard ones will work but leave a lil to be desired when lining up the rockers as these heads do not have a stock valve location but its damn close as the valves are only moved .030 of an inch

i should be able to start driving the car around tonight or tomorrow morning so ill get some videos and stuff up shortly

NemeSS-TyranT

iTrader: (1)

any good results from the heads. I got a customer that is wanting me to install a set of these heads on his car.

project89

iTrader: (1)

sorry didnt relize there was a reply , car still hasnt left the shop ive been to busy to work on it , id have no fear of installing these heads on a customers car

as long as they are assualt heads and not the procomps

trnsplntformula

I have this very same set of heads on an 11:1 comp 383 running 93 from the pump. Performer rpm cam and intake with Doug's full length heads and these heads work great, all they needed was some cleaning up in the ports and ready to go. Make very good power doesn't even seem like budget heads really. Very nice castings.

Chad Speier

iTrader: (1)

I'm late to this thread, but you need to be clear on something. These heads you "saw" we they my heads (meaning CNC stuff) or were they the import castings (maybe even my CNC stuff)?

For the record I received my 39th and 40th CNC import head this week. I have been through 3 pallets and have had ZERO issues. So if you wouldn't mind pointing me in the direction of these guys that weren't so happy, I would be interested in what their skilled eye has seen.

bygddy

Don't bother Chad, there's zero merit to Gary's post and he gets confused by anything that doesn't have a big AFR stamped on the end....(check his profile for some amusing discussions on heads both here and on hotrodders)...it could have been any cyl head or it could have been a complete fabrication.
Don't sweat it.

Chad Speier

iTrader: (1)

Pretty much what I thought, but if a guy is going to spew it, better back it up..

V8cavalier

I have a set of these heads along with an assault intake and ignition system on the sbc in my race car bid totals 427 it is producing 738 HP @ 5400 rpm. With a 8500 rpm redline.. defiantly worth the risk.

cuisinartvette

738 at 5400rpm only?
Lets hear about this combo

project89

iTrader: (1)

since i just got a pm about thees ehead sim going to bump this thread with some more info

std rocker stud girdles do not fit <<< i dont belive i mentioned that before
i know ive mentioned this but ill mention it again
the valve location/rocker stud location is not stock so use adjustable guideplates , this is also why std stud girdles do not fit

Orr89RocZ

iTrader: (20)

How much boost or nitrous? And no its not pulling 8500 rpm with a peak of 5400...

But these cores can be ported and work well.

project89

iTrader: (1)

its got to be nitrous or boost on that thing.
mine should be going to the dyno sometime this late spring

InfernalVortex

iTrader: (4)

So what all do we need to make these heads work?

Do they bolt up to a Vortec intake well? Or is there die grinder work needed? Standard vortec gasket? Adjustable guide plates is all that is needed? The accesory holes line up properly?

Fast355

iTrader: (2)

I think these are the same heads my buddy just put on the 383 in his 98 K1500 mud truck. He is using stock replacement intake gaskets (port through the gasket is huge) and a stock intake manifold. Its difficult to judge performance though. The truck is on 44" tall tires and weighs close to7k with the Dana 60 rear and Dana 44 front lol. The cam in it is really mild as well. Its a LT1 Vette cam with 1.6:1 roller rockers. When I started tuning it with HP Tuners I discovered it had an active P1345 trouble code and the timing advance was in a sort of limp mode. It was pulling well with only 21* of total timing fwiw! My buddy is going to restab his distributor and clear the code so I can fine tune it. But it seems to run pretty well.

project89

iTrader: (1)

vortec or std intake will bolt on , my tpi intake would not seal up on the ports though , it left just a lil bit of the top of the port uncovered


all my acessorys bolted right on

project89

iTrader: (1)

im really surprised any stock manifold will seal up on the ports,

Fast355

iTrader: (2)

The factory vortec intake and gaskets will seal up just fine to the 210cc GM Fastburn heads. Stock intake is done by 5,000-5,500 rpm though.

project89

iTrader: (1)

i relized it was a votec intake after i posted when i saw the year of the truck, when i posted i was thinking stock std tbi intake

BuzzLOL

. Looks like this was just a 12 yr. old One Posting Wonder having some fun...
.

F-BIRD'88

Interesting.. Wonder how thick the casting is in and around the combustion chamber is. Wonder if these have enough meat to allow custom reshaping the combustion chambers larger 64cc to 76-80cc size finished. (large chamber for supercharged applications.)
Has anyone cut any in half?
Casting Aluminum alloy and hardness quality?

Interesting.... $400 a pair bare.
Can play with them a lot at that price.
The dual intake bolt patterns is a plus for me.
Keep us updated.....

F-BIRD'88

Does the angle plug version fit common
standard exhaust headers (Heddman etc). or......? Issue?--- Non-issue?

D_Smith87

Ran into this thread when i was looking up recent posts having to do with my skip white "NKB200" heads i purchased almost a year ago, never had a chance to install them due to some detonation that took out 3 pistons on the drivers side bank, i had my machinist look over the heads and he said with minimal work they could really improve as far as flow, he was satisfied with the machining quality also, none the less these should be a mega improvement over my ported 081 tuned ports in the entire powerband, ive haf great sucess with budget engines in the past and with careful planning and attention to detail there is no reason to stray away, i like the idea of not building a "me too" motor, i could afford some AFRs but i have a goal of 450 horse, why spend it if you dont need it right? My heads are advertised as 250/187 intake/exhaust @.550, i will get them flowed before i assemble. The heads were $509 shipped to me. And this gary guy I've too had run ins with him, hes always out to cut people down who are trying to build a mild performance budget motor, and unhappy if someone uses inferior parts even when its perfectly acceptable per power level of said build. Good information on this post, i hope to see some responses guys happy hottoddi g.

D_Smith87

Also wanna know the cool part of the guys that throw budget motors together and beat them to death? We actually get to for 1- experiment and learn with stuff and do not what these "other guys" are doing, my last motor in my iroc was a craigslist pro, leftover parts from my old buddies hot rod, self ported and polished rubber burning machine under a grand, a lot of guys around here might really look down on someone like me spending 15+ Hours of my life with a die grinder on a measly set of 305 tuned port heads, but you know what? I was satisfied with that motor and it took a beating, and i had few premium parts in that thing but tons of fun instead. And for 2- you dont need to break the bank to get a motor done, you actually can build it fairly quickly even on a budget and be driving around in no time while these other guys are having fancy uneeded crap done to their 400 horse motors they claim are making 600 horse. Now if i am to build a 600 horse motor that is when it becomes time to put premium parts on, until then ill stick to my entry level eagle rotating assemblies, summit hardware and off the shelf comp and lunati cams with 110-112 lsa for the street powerband minded individuals.

FtrSpeedy

Ive been building my 404sbc for 2 years now, put a set of assualt racing heads on, bought quality parts for them and had my machinist look through them and assemble. I just broke in the cam few days ago hopefully on the road shortly for a shakedown. My hp goal is 550, whether i get there or not itll be fun and im happy with how the heads turned out.

project89

iTrader: (1)

i have the angled plug version and had no problems bolting headers to them though they werent f-body headers , and now i have up and foward turbo headers on them , id imagine it would be no different then any other set of angle plug heads
, as far as chamber thickness i belive chad spiers has pictures of a set cut in half
heads are thick enough to be angle milled as well

im sure u will like them , mine ran for a lil bit before the cam went flat , im geting ready to break in the new cam here in the next few days

if u cleaned up the castings a lil bit under the seats ( needs some blending ) and in the port entrance u should be very pleased with them

these heads benefit greatly with a cam with high lift , ill be swaping to a solid roller over the winter if i dont sell my car aiming for .625 lift

project89

iTrader: (1)

there ya go

D_Smith87

D_Smith87

Those are pics of my skip white heads, unfortunately the pictures didnt resize right

D_Smith87

rb85TA

Well, I like the look of these ASSAULT head's & for $400.... coupled with savvy shopping for the parts & a couple of hrs of cleanup & double checking, HELL YEAH!
BESIDES, IF CHAD SAYS THAT THEY'LL WORK. ... THEY'LL WORK!

FtrSpeedy

I too have the angle plug assault heads with the hooker super comp headers, no spark splug issues.
Im only running .550 lift with lots od duration. Should get my first test drive tomorrow.

project89

iTrader: (1)

let us know how it goes , im running a comp xe274h with mine on the turbo build, what cam r u running with the heads?

rb85TA

Project89, have you dyno'd or run yours yet?

project89

iTrader: (1)

i logged some street miles on the combo n/a with the summit 224/224 camshaft , with a stock 700r4 converter , even witht he super tight converter it made great power down low and ripped uptop . shortly after i had some things come up and the car got parked. i just recently started working on it again and found the summt cam was going flat , in the middle of the rebuild right now and hopefully firing it up this weekend

project89

iTrader: (1)

heres what the cam i pulled out looked like











not taking chances with the cam this time
everything is comp camps , cam,comp magnum lifters , and comp pushrods , with comp breakin oil , rockers are summit whitebox but i know they are a good rocker . also grabbed a hv/hp pump




its got a th350 with transbrake and 4,500 stall behind it now

The_Punisher454

I had a few flat cams several years back. Discovered the problem is that almost all the engine oils now days have no ZDDP in them. Theres a very few left that do.
Delo 400 (NOT 400LE) has lots of ZDDP, and VR1 has lots of ZDDP.
There was a long thread on Team Chevelle several years ago regarding the oil problem, good stuff there.

Anyhow, since sticking to VR1 and original Delo I've not had any more flat cams.

rb85TA

Right on. Are you staying with hyd. flat tappet. .. or hyd. Roller this time? I hope you went with the roller, I think that would be better suited for your application & would live. If not, I wish you better luck this time around. Not trying to down your build, I think it's GREAT! BUT the abuse of the valve train under boost, I really don't think that a flat tappet cam will live long.
On the other hand. ... I'm SERIOUSLY STOKED, that the head's are up to the task, & 1GARY'S been proved wrong ��!
He gave me a ration when I first got on TGO. I had some personal issues slow my build down, shortly after & has been a bit of a task to get back on my feet. You guys, really help to motivate me & have helped me push through. ...so, THANK YOU FOR SHARING.

rb85TA

YES, I'm aware of The oil issue. ... I run a torko additive with Castrol blend & have had zero problems.

rb85TA

Synthetic blend, mind moves faster than fingers lol

project89

iTrader: (1)

im in a mad dash to get the car ready for a race , so i didnt have the funds or time to do a solid roller swap , im still running a hyd flat tappet , this winter if i dont sell the car i will upgrade to lgm shaft rockers , and a solid roller lifter/cam with massive lift. the other plan is also to put the second 76mm on , was going to put the twin 76's on now but ran out of time. with the amount of boost and rpm im turning i have some stiff springs on the motor 130 pounds on the seat , and over 400 pounds over the nose of the cam, need to run the outer springs only during breakin

rb85TA

I fully understand, lol, it's been a while. .. but I'll be damned if I don't miss the thrash ☺!

rb85TA

What kind of cam specs are you looking for?

project89

iTrader: (1)

something like 234/238 @ .050 with .625+ lift solid roller
maybe slightly more duration going to be hard to tell exactly what the motor will want till i get both 76mm turbos on it

rb85TA

I have a custom grind from Bullet racing ( never Installed ), 260/260@.050 & .668/.668 lift with 1.5:1 rockers. It's a solid roller, I was going to put it in a sbc 409 cid for the strip. ... but, as I said, a few things have changed, so I don't need it.