I was just searching through the Summit web site and I found a link to these heads.

http://www.brodix.com/IK%20200.html

They were $1000 and are assembled Aluminum heads. They flow as good as the Trick Flow heads.

http://store.summitracing.com/partdetail.asp?autofilter=1&part=BRO%2D1021001&N=115&autoview=sku
Any thoughts?

The iron killers are a very good head and if you run em up agains a trick flow side by side on an honest bench, they will pull down better numbers everywhere....especially with the CNC chamber option. The cast is similar to the race rite 200cc heads and the put down similar numbers to those. The thing with the IK heads is that they are a "one style" cylinder head.......basically the only option is the CNC chamber option(which is worth it). Other than that, what you see is what you get. They only come in a 200cc port with 2.02 valves, 64cc chambers...... Their meant to be a one style head that fits a variety of applications, but there arent a lot of options......I guess this helps cut costs.

They are very great heads for the money and are in the league of AFR 195 heads(closer comparison if you get the IK heads with the CNC option)....FYI, the race rite 200cc heads outflow the AFR 195 side by side on the same bench by a little bit....the intake port on the race rite 200cc head is in the league of an AFR 210. However the larger 210 AFR head passes the race rite 200cc up at high lifts.

If you are considering a set, even without the CNC chamber option, I dont think you can beat em for the money. The next best step woud be to save a few more bucks and go with an AFR or brodix race rite....but the IK heads will compete with most any other typical head out there and especially anything in the price range.

Greg, I'd be interested in seeing your side-by-side flow data on the CNC chamber Trick Flows vs the CNC chamber IK200 heads . . .

The Trick Flow heads flow and run good -- they will benefit from a careful cartridge roll blend too if you have the patience.

I have not seen or used the IK200 heads so I can't really comment on them.

Ive never seen results for the CNC chamber trick flows other than what trick flow has posted. I can probably get some though, just dont have em handy.

Here is what trick flow calls the numbers though.

0.100 64 56
0.200 138 105
0.300 198 146
0.400 237 171
0.500 257 186
0.600 258 196


Here are handy numbers for the race rite 200cc heads with and without the CNC option. The first set is with the chamber option.

.050 - 34/26
.100 - 67/63
.200 - 134/114
.300 - 194/164
.400 - 243/181
.500 - 266/189
.600 - 270/193
.700 - 279/195


.050 - 32/27
.100 - 64/52
.200 - 113/91
.300 - 168/135
.400 - 220/165
.500 - 249/181
.600 - 268/191
.700 - 279/196


Unfortunately, that aint a totally fair comparison cause the trick flows were done on whatever bench trick flow uses....and I have no clue what size the bore fix was. The race rites were done with a 4.155 fix. The IK heads show similar numbers to the RR heads, and right now, Im tryin to see if I can get both the trick flows and the IK heads on the same bench to have a fair comparison of that deal. I should be able to dig up the IK numbers from the same bench that the race rites cam from(they are around somewhere), but I dunno if I can get numbers for the CNC chamber trick flows from that same bench too.

Ill try and ask Mike from the chevelles board too. He has tons of data. Plus, there is a local shop in the area that does lots of performance headwork.....they aint too bad either. They used to(maybe still) do work for the cylinder heads on the "gravedigger" monster truck. So, with the gravedigger reference, they get lotsa local work and have lots of data from lots of heads. Like I said, Ill try to dig numbers that all came from the same bench in hopes to eliminate any variables/error.

Ive never seen results for the CNC chamber trick flows other than what trick flow has posted. I can probably get some though, just dont have em handy.

Here is what trick flow calls the numbers though.

0.100 64 56
0.200 138 105
0.300 198 146
0.400 237 171
0.500 257 186
0.600 258 196


Here are handy numbers for the race rite 200cc heads with and without the CNC option. The first set is with the chamber option.

.050 - 34/26
.100 - 67/63
.200 - 134/114
.300 - 194/164
.400 - 243/181
.500 - 266/189
.600 - 270/193
.700 - 279/195


.050 - 32/27
.100 - 64/52
.200 - 113/91
.300 - 168/135
.400 - 220/165
.500 - 249/181
.600 - 268/191
.700 - 279/196


Unfortunately, that aint a totally fair comparison cause the trick flows were done on whatever bench trick flow uses....and I have no clue what size the bore fix was. The race rites were done with a 4.155 fix. The IK heads show similar numbers to the RR heads, and right now, Im tryin to see if I can get both the trick flows and the IK heads on the same bench to have a fair comparison of that deal. I should be able to dig up the IK numbers from the same bench that the race rites cam from(they are around somewhere), but I dunno if I can get numbers for the CNC chamber trick flows from that same bench too.

Ill try and ask Mike from the chevelles board too. He has tons of data. Plus, there is a local shop in the area that does lots of performance headwork.....they aint too bad either. They used to(maybe still) do work for the cylinder heads on the "gravedigger" monster truck. So, with the gravedigger reference, they get lotsa local work and have lots of data from lots of heads. Like I said, Ill try to dig numbers that all came from the same bench in hopes to eliminate any variables/error.Are these numbers from your flow bench or just published numbers? Sorry, I'm confused.

These are the flow numbers on the IK200's

0.200 123 100
0.300 181 145
0.400 230 164
0.500 253 171
0.600 261 177

Exhaust looks weak, any thoughts on cam selection in a 383 with a max RPM at 6000?

The trick flow numbers are trick flow published numbers. Thats why I made that comment about those cause I dont got my own(yet). I dont have my own bench(wish I did), but the race rite numbers ARE from an independant shop.....not published numbers. Ive got numbers for some other heads too, and I try to collect them from trustworthy, independant sources in order to eliminate any "hype". Thats the best way to compare basically rather than look at just the published numbers.

Like I was sayin about the trick flows, I dont have numbers for the CNC heads but Im pretty sure I can get them as well as IK numbers from the same bench so its a fair comparison. Once I get them, they wont be published numbers cause that aint fair.

I purchased a set of these Heads and they are being used on a 383, 10.42:1
compression ratio. Engine will be dynoed next week. Don't know the specs on the roller cam as the engine builder selected the cam. Will Post the results as well as the Cam specs after the dyno run if you like.

The exhaust port is one area where AFR has it on the brodix for sure. Ive got numbers for AFR too(from the same bench as the race rites), and although the 200cc race rite(with the chamber option) has slightly better numbers than the AFR 195(on the intake side) and similar numbers to the AFR 210(up to roughly .450 lift....the 210's take off noticeably from there up), the AFR heads in general have stronger exhaust ports. The brodix exhaust dont suck....they just arent stellar. The I/E ratio tends to fall right around 70%.....75 would be nicer, but you can make it work. Because of this, a split pattern cam is typically better...Id use an exhaust lobe thats 6 degrees larger minimum(with the brodix). Usually(not always), afr heads dont need an exhaust lobe any more than 6 degrees larger(than the intake) cause of the better I/E ratio.

I purchased a set of these Heads and they are being used on a 383, 10.42:1
compression ratio. Engine will be dynoed next week. Don't know the specs on the roller cam as the engine builder selected the cam. Will Post the results as well as the Cam specs after the dyno run if you like.

Would be interested to hear how your 383 does on the dyno.What kind of bottom end are you using and what size carb?Who are you having build your motor?reason why I ask is because I too am having a 383 being built for me too and was curious as to what you were running.Mine won't go on the dyno for another 3 weeks yet but the advertised hp the builder is using is 550 with 502 lb/ft torque.I'm running 11.1:1 compression.Should be a monster :thumbsup:
Please PM me or post back when you get your results.

John

I agree that the exhaust numbers for the IK look a bit weak. It could be that they didn't use a pipe for the test but 171 at .500 is not so great compared to todays top flowing heads

John
The bottem end is Scat, I am building a "stand off scale" DZ 302 looking engine. Internally balanced, 780 cfm Holley etc. Here at 2300 ft above sea level I would expect around 435HP. 460 Ft lbs of torque. Nothing too radical but more than enough to get into trouble with a 3200 lb Z-28 clone if you don't stay on top of it!
http://members.shaw.ca/mjmccall/gallery/Engine/Engine%20005.jpg

Just to add, those numbers above for the iron killers are brodix published numbers. Typically, it seems like brodix is a tad conservative on their numbers. Anyways, look at the race rite numbers I put up. Once again, both sets of numbers are from an independent bench(not brodix published numbers). The first set is with the CNC chamber...the second set is as cast. The exhaust port on the CNC chamber heads are about 10 cfm stronger all together than what brodix published numbers says...plus I forgot to include that the tests were done with no pipe(from the numbers I posted). So, you could expect better numbers yet with the addition of a pipe.....meaning, that although still not stellar, they are a little more respectable than what brodix published.

This is why its so friggin hard to compare cylinder heads from different sources cause so many variables dictate the outcome. Just like dyno pulls....its a good tuning aid but never a perfect comparison from one motor to the other when the numbers come from different sources. In the end, the racetrack is the best place to find out what you got.....and really, all of your higher end conventional heads out there(AFR, brodix, trick flow, pro topline....) will all show pretty similar results at the racetrack. Depending on the whole combo, one head can be faster than the other on one motor, and slower on another motor so its never easy to guarantee one is better than the other cause its not always that way combo depending.

So you're saying the IK200's flow the same as the RR200's ?? I'll reserve my judgement on the IK200's until I see flow numbers for IK200's ;)

I agree with what you are saying about the different flow benches though. Different models flow a lot different too -- some actually flow at 28" others have to flow at 10" or 15" and convert, etc.

It would be nice if the IK200's turn out to be killer heads -- there hasn't been many good iron heads to pick from since ProTopline went under.

IK200 are not iron Heads.

there hasn't been many good iron heads to pick from since ProTopline went under.
I still Have acess to these heads if you have a particular head your interested in let me know and I can get you a quote. :D

IK200 are not iron Heads.

DOOOOH :clonk:

What are they then? I now know they are aluminum, but how are they different than the Race Rites?

The differences is that they are a lighter weight casting(same alloy though), and they have 2.02 valves instead of 2.055 valves like the race rites. The intake port isnt quite as strong on the IK heads(could be all due to the valve difference, and actually, you never know but the smaller valve in the IK head may be beneficial to an extent in a smaller bore engine). The race rite numbers were from a 4.155 bore fix.....they may be more equal on a 4 inch bore....I dont know, just speculating. But they are close to the race rites.....just not quite. They also dont have many options......aside from the CNC chamber option, they are simply 200cc heads with 64cc chambers and 2.02 valves.

The race rites would probalby be safer in a situation where youd really be abuisng the engine and they do flow a bit better to boot and have more options to configure them. Oh yeah, since you mentioned pro heads....just for giggles Ill put up some pro topline 200cc heads flow numbers that came off the same bench as the race rites. I was real impressed when I got to have a look at the numbers. The mid lift numbers look real healthy. Ill get em up soon. Still looking for a trick flow CNC set of numbers.

These are the flow numbers on the IK200's

0.200 123 100
0.300 181 145
0.400 230 164
0.500 253 171
0.600 261 177

Exhaust looks weak, any thoughts on cam selection in a 383 with a max RPM at 6000?

The reason Brodix heads appear to have a weak exaust port is because they dont flow them with a pipe like all other manufacturers. Brodix told me a rule of thumb is add 10% to compare with other manufacturers that flow with a pipe.

Nick, I wouldn't believe Brodix or any other mfr when making a blanket statement like that . . . LOL

A test pipe will not effect flow the same at every lift test point so its impossible to say 10%, 2%, or 50% . . . . At very low lifts the pipe will typically not affect flow at all. At mid lift it probably makes the most difference and the benefit usually starts trailing off at high lifts a little. In my opinion, a test pipe will increase the flow at mid and high lift a few cfm depending on the head -- typically about 5%, but if you average flow increases accross the board and include low lift numbers it will average much less than that.

If you go to www.chevyhiperformance.com and look at the heads in their flow test data base you will see that they have flow numbers with and without a test pipe for a LOT of the heads they test. You will see what I mean.

I think the real benefit of a test pipe is that it more closely represents what an exhaust port will flow once it is installed on the car.

Nick, I wouldn't believe Brodix or any other mfr when making a blanket statement like that . . . LOL.

Come on man....Eric, They said as a "rule of thumb" Not, "its gonna be a 10% difference dammit" But from all the research ive done ive concluded that Brodix is the most honest company ive ever dealt with and from several independant tests ive also seen that they are conservitive on numbers compared to other mfr's, so ill give em the benifit of the doubt. Is it going to be a 10% difference? Nah probably not maybe more, maybe less at certian lifts, but it was a simple figure given to make comparo's in a conversation at Car Craft 2 summers ago. By the way nice writeup in HotRod. So how it feel to be the Demon Carb posterboy in the mag :) Did you get any money or a free carb for that??

So it is a decent head for the money ( on paper )

Any thoughts as to a cam to get the most torque out of them? I would say that the 200CC sized would hinder that.

Also, If running 10- 10.5 to 1 ratio in a 383, would you get by with 89 Octane gas?

Thanks Nick -- it's kind of good to know that the cars on the Demon ads (at least mine) actually run Demon carbs . . .

Brodix is the most honest huh . . . LOL -- OK :D Thats like saying a particular politician is the most honest. ;) (just messing with you)

Check out this one --

CHP website: Track 1 head -- 246 cfm @ .500" lift.

Brodix website: Track 1 head -- 264 cfm @ .500" lift

I think ALL the head mfrs inflate their advertised numbers. Maybe some ARE worse than others and maybe Brodix is better than most, but I don't trust any of them because every head I've actually had flowed on the bench came up shy of what they put in their literature. Although my Trick Flows were pretty close.

Maybe I use a shop with a conservative flow bench -- I dunno, but I will say my Edelbrock Vic Jrs came up a bit short of what they claimed and were very inconsistent port-to-port. After a bunch of work they are flowing at what Edelbrock advertises.

I hear AFR is supposedly pretty "honest" with their numbers, but when you do the comparison at the CHP website their mid-lift exhaust port numbers are off quite a bit on the 195. Its unclear what exact head (70% CNC or 100% CNC) they are flowing on the CHP site so who knows. I will say that the intake number comparison is pretty much spot-on if the street head is what is used in the test.

It's hard to hold anyone's feet to the fire on this anyway IMO because like Greg was saying all benches are a little different. I start getting suspicious though when stuff flows 5-10% off from what is advertised.

I just got the new hot rod issue yesterday. I already remembered from before that you posted about winning the fastest NA small block catagory, but now that I got it all in front of me to read I just wanted to say damn good job Eric. Congratulations on the win and the nice layout in the mag. Im sure if you wanted it, that kind of reference/credentials could very well open up some new sponsorship opportunities.

Thanks Greg! Hate to hijack this thread -- there is another about the HRM issue in Bench racing.