New heads are finally here!!! Pics inside!
- Thread starter Killercanary
- Start date
The mid and low lift flow are the balls. But I'm still wondering about the shorter stroke you're using. I'd think with those numbers you'd want more piston speed to increase the velocity to use up all that flowing goodness. Knowing now what the kind of heads you're be bolting on compared to what you thought you would be running, would you still pick the 331? I think you may have touched on it before, I know you picked that stroke for a reason... can you explain the reasoning again for the slow kids in the classroom?
Adam
Adam, I've planned to run these heads from the get-go. The only reason my 165's made it onto my dart shortblock was due to the fact that these comp 185's were delayed and I wanted to get the car back on the road. I had the option to either fix my 165's and run them or put my 185's that I have for sale in my sig. on the dart block. I chose to fix the 165's because I do plan to someday build another stock shortblock combo (I had planned to do this to my '90Gt but I recently sold it, but I hope to get a 94-95 coupe down the road), and the 185's won't work on a stock shortblock without piston notching. That was the only reason i did what I did in regards to my head selection.
Having said that, if I really had to do it all over again I would have built a high compression 363 with much of the same parts I have now and as Rob mentioned try to shoot for 450rwhp. I think it could be done. I'm going to continue to tweak this NA combo, low compression and all, to see how close I can get to 400rwhp before I put the turbo kit on. If I come across a deal on a set of long tubes and X pipe I'll probably grab them just to help get me to that 400rwhp mark.
I chose 331 cubes because of the turbo I had at the time when I was building the combo. It was only a T64e and 331 ci was about the max cubes that I could run with it and be anywhere near efficient. 331 also was enough to spool the T76 I had hoped to one day buy... and I did about a month ago! Also, I chose 331 due to the fact that my turbo kit is setup for a T4 flanged turbo and a T4 flange starts to be an issue when you start upping the cubes past where I am at. I did a lot of research and talked to as many people as I could and for what I wanted (a sick and efficient street car) and the 331ci, AFR185 comp headed combo seemed to be the best bet. We shall see...
Tom- I sure hope so. I'm just about done with the fox TB conversion and I hope to get the car on the dyno in the next week or so to see what it was worth. After that I'm going to swap the heads and re-dyno it to see what they were worth. I'm running out of time but I'm doing everything in my power to get it done.
Rob- that is the combo I now wish I had built.
Zero Signal
Active Member
That would be a sweet combo.....
347 c.i. shortblock 10.5-1 to 11.0-1 compression
AFR 185 cnc comp package heads
custom cam
ported Holley Intake
90mm throttle body
1 3/4 longtubes
etc....
450rwhp.............
I may need to change my sig in the "have not yet bought" category
Will these things run under $2k or is that wishful thinking?
I may need to change my sig in the "have not yet bought" category
Will these things run under $2k or is that wishful thinking?
The heads yes, the combo, hell no!
Thanks guys!
I should finish the fox TB swap tonight or this weekend. I have to drill a hole in the plate that bolts to the firewall and wire in the TPS connector. I removed the cruise control cable last night (it was kind of a PITA) and now wonder how I'm going to make a fox cruise cable work. If I get it all buttoned up this week I "should" have dyno numbers for the TB swap next week, then these 165's will come off and the 185's will go on and I'll repeat the test.
Very nice cylinder heads.
AFR quality is top-notch.
I await the fox style swap. There is a few HP just off the style of swap!
I should finish the fox TB swap tonight or this weekend. I have to drill a hole in the plate that bolts to the firewall and wire in the TPS connector. I removed the cruise control cable last night (it was kind of a PITA) and now wonder how I'm going to make a fox cruise cable work. If I get it all buttoned up this week I "should" have dyno numbers for the TB swap next week, then these 165's will come off and the 185's will go on and I'll repeat the test.
I plan on keeping the 165's, that is why I spent the extra money last year on updating them with AFR's newer valvetrain. I decided to keep the 165's and sell the 185's since more than likely whatever I build down the road will be a stock shortblock setup. I really want to build a max effort 94-95 coupe with my identicle old combo and see how far into the 11's I could get it to go.
Are you sure it was these heads and not just the regular 185's? I'm 99% certain that these things JUST and I mean JUST became available. They had a set for their own testing for a few months, but mine were one of the very first production castings.
Good to know that things are coming along quickly.
I have two issues with the dyno runs coming up. What is the mileage difference between your baseline run, and the ones you will be making. How many miles are on it now?
My engine "freed" up a bit after getting some mileage on it. I have seen a couple dyno/track test with this as well.
I believe you are going to see gains, more from the design of the throttle body set-up (Sn-95 to Fox), than the diameter of the throttle body.
You will see a gain for sure, and my reasoning is from the engine mileage and the straigther/faster shot.
Originally I was going to do back to back dyno test comparing the fox and 94-95 TB. I was going to do it with the 165's, then go home, swap the heads and head back to the dyno a week later and do the same back to back test again. I'm running out of time for Carlisle and I need to get the ball rolling on swapping the new heads on so I may dyno the car with the AFR165's and only the fox TB, then swap the heads and then do the back to back with the fox and 94-95 TB's.
I'll have to check on the mileage but I know its not a lot. I can't run synthetic oil yet.
I'll have to check on the mileage but I know its not a lot. I can't run synthetic oil yet.
They actually called them comp 185s. The article went into detail about the special cnc porting and moving the exhaust opening up .125 (i think)
They also said stuff about light trick valves and other differences from the regular 185's.
I will double check tonight. I can probably scan the article tomorrow and email it to you if you wish.
Tim
Hmmm... that is very interesting and does sound just like mine as they do have the raised exhaust port of the 205 head and the other things that you mention. I'm sorry if I was wrong, please let me know what you find out. Thanks Tim!
YEAHLOH95
Founding Member
I SAW A SET ON EABY LAST WEEK , COMP 185'S J/K
I'LL BE OVER TONIGHT TOHELP YOU GET THAT THING FIRED UP.
I'LL BE OVER TONIGHT TOHELP YOU GET THAT THING FIRED UP.
