Anyone have any pics they can post or advice on how much to remove and where to grind??
Home portting a set of oval ports???
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1968 hot rod
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1,421 Posts
alright not this shat off will you guy's!!
This is for a 408 I'm putting together either as a back up motor for an oval to square expermint.
Or my friends want to Ebay it off its gonna have good parts so maybe I can clean out the garage some.
They run a 70 402 velle and run ret ports @11:18 118mph.
This is for a 408 I'm putting together either as a back up motor for an oval to square expermint.
Or my friends want to Ebay it off its gonna have good parts so maybe I can clean out the garage some.
They run a 70 402 velle and run ret ports @11:18 118mph.
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1,421 Posts
I'm also wonder which roller cam to use.
I will figure that one out after I decide which casting to use.
I will figure that one out after I decide which casting to use.
You guy's are too much
Last weekend my car ran 10.72@125.12 in 3,200' air with a slight crosswind. Looks like I'll be changing my signature pretty soon, as those times in my signature were posted earlier this year in nearly -1,000' conditions with a 10-15mph tail wind!
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73 Posts
In comparison to Ole' Red there, i'd say My combo runs better then "OK"
![Image]()
Back to the point at hand!
factory oval port heads when
preppared properly will support 700+HP and 7000 RPM while flowing 320+cfm MORE than
enough for any real street/strip ride!
before you guys go off on a tangent about how the air in NJ is sooo much better for ET's.....the conditions and DA that Ken just posted about when his best ET was made, those conditions rival the best conditions that we see in NJ all year long. In fact my best ET was at +2000' DA. You'd see a drastic improvement in performance from my combo at -1000'.
Back to the point at hand!
factory oval port heads when
preppared properly will support 700+HP and 7000 RPM while flowing 320+cfm MORE than
enough for any real street/strip ride!
before you guys go off on a tangent about how the air in NJ is sooo much better for ET's.....the conditions and DA that Ken just posted about when his best ET was made, those conditions rival the best conditions that we see in NJ all year long. In fact my best ET was at +2000' DA. You'd see a drastic improvement in performance from my combo at -1000'.
Brian, just to make sure I was clear in my post above. The ET/MPH in my signature, 10.60@127, was posted from February of this year at Reynold, GA when the DA' was nearly -1,000' and a 10-15MPH tailwind. At the time I was running a ported dual plane Performer RPM and a Wilson tapared spacer. We NEVER see conditions that good at my home track in Commerce, Ga.
The 10.72@125.11 was posted this past weekend at an 1,100' track with a DA of 3,200 and a slight crosswind running a custom built Dart Oval-Rect port intake and a .5" wood spacer.
My point is that my car will soon shatter that 10.60@127 as soon as the good air comes back around. According to my weather station my car has a DA factor of ~.01x150'. Look for a bottom 10.5x or high 10.4x pass at 129-130mph, if not better than that.
G
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·OK, what's the "DA" acronym thing?
If I've asked before, it's b/c my pointy little head just doesn't remember what it means.. Please bear with me, it's heck ta get old..
pdq67
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote
If I've asked before, it's b/c my pointy little head just doesn't remember what it means.. Please bear with me, it's heck ta get old..
pdq67
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote
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73 Posts
Ken, exactly what i was saying, maybe i worded it more confusingly.
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22,967 Posts
Most of us...Originally posted by kjett:
We'll ALL be throwing up killer numbers in another month or two.![Image]()
Most of us...Originally posted by BillsCamino:
</font><blockquote>quote:</font><hr />Originally posted by kjett:
We'll ALL be throwing up killer numbers in another month or two.![Image]()
</font>[/QUOTE]If you need someone to blow the carbon out of that 540 you've got my number
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73 Posts
thanks Ken!
It just can't be possible that Ken J. is running that fast with an RECTANGULAR port, ALUMINUM HEAD, and SINGLE PLANE intake in a full weight Chevelle. It just can't be done. Not to mention that a single plane intake is showing to be faster than a dual plane??? Say it's not so.
Ken must be running 14+:1 compression to be pulling that off....Oh that's right it's a pump gas engine to boot.
I'm just joking folks.
Ken's car is proof that there is truly more than one way to skin a cat.
Nice work Ken!!! Keep us posted on how things turn out on the intake swap when the weather cools off a bit.
![Image]()
Ken must be running 14+:1 compression to be pulling that off....Oh that's right it's a pump gas engine to boot.
I'm just joking folks.
Ken's car is proof that there is truly more than one way to skin a cat.
Nice work Ken!!! Keep us posted on how things turn out on the intake swap when the weather cools off a bit.
1970 SS Chevelle. 454, LGT-700 5-speed, 4.10 rear. 11.30@121mph
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3,430 Posts
Sorry for the delay in response guys. I am out of town on business in Manassas Va. and my wireless connection in the hotel keeps crappin out.
Anyway, the heads I have are not for sale, I just have them off of the motor at the moment and figured if the guy lived close enough, I could pop a few valves out of one of them and he could see what it looked like in there. I won't be back in town till early next week though. I paid $135 for the castings, Rich did the milling, cleanup, new guides, installed new valves, port work intake, exhaust, gasket match,....and a bunch of other stuff that I have written down at home for about $700 if i remember correctly. I can check when I get back
As far as rect port vs oval port goes,........
![Image]()
Anyway, the heads I have are not for sale, I just have them off of the motor at the moment and figured if the guy lived close enough, I could pop a few valves out of one of them and he could see what it looked like in there. I won't be back in town till early next week though. I paid $135 for the castings, Rich did the milling, cleanup, new guides, installed new valves, port work intake, exhaust, gasket match,....and a bunch of other stuff that I have written down at home for about $700 if i remember correctly. I can check when I get back
As far as rect port vs oval port goes,........
Here ya go:
1966 Chevelles SS
454 x .030 = 4.280 bore
deck height .010 Felpro 1071-1 head gasket (.051 quench)
10.37:1 compression
Lunati Racer Series 4" forged crank
LS-7 rods, 7/16" ARP bolts, shot peened
Wiseco forged pistons K117A3 36cc dome flycut to 32cc
Canfield 119cc rectangle port aluminum heads (mild port work)
REV severe duty valves 2.25/1.88
Custom ground Comp Cams billet core solid roller .655/.660 248/254@.050 108LSA 106ICL
953-16 Comp Cams valve springs
732-16 Titanium retainers
CLO-9-3110A Hex-A-Just timing set
ATI-917060 7" ATI Super Damper
84174 Lunati 1.7 aluminum roller rockers
4021 Comp Cams 1 piece stud girdle
Dart oval to rect custom ported intake
Holley HP950 carb with 1/2" spacer
Griffin aluminum radiator
CSI electric water pump
Flex-a-lite twin electric puller fan
March Systems serpentine pulley system
Manual steering
SSB disk/drum power brakes with Comp Cams vacuum canister
Hooker Super Competition headers w/2" primaries
Dynomax bullets with turn downs
TH-400 with full manual reverse valve body built by Neil Racing Tranmissions
8” ATI Treemaster MRT converter flashes to 5,300
12-bolt Chevrolet rear end
4.11 Strange gears/Moser C-clip Axles
Edelbrock no-hop bars
1-1/8" rear sway bar
Hotchkis adjustable 4 link rear w/air bags
Hal 12 way rear shocks
Moog factory replacement springs rear
Global West upper/lower control arms front
Custom QA1 coil over front with small block springs
28x10.5x15" MT ET Drag "S" series slciks mounted on Weld Draglites
28"x4.5"x15" Hoosier skinnies mounted on Weld Draglites
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18,738 Posts
Jim, thnx for solving that enigma for me, I couldnt figure out why you were going to sell them. Great heads for sure.
If you are contemplating a test of rect v oval on a 408, don't bother yourself unless its cammed to run from 4500-8500. Even with a 454, or a small 440, rects will only shine from 4500-5000 rpm on up.( unscientifically speaking). On a 408, that number has to be much, much lower.
I would pretty much copy Todd's 414 ci setup, since its a proven combination at that same ( nearly) displacement.
If you are contemplating a test of rect v oval on a 408, don't bother yourself unless its cammed to run from 4500-8500. Even with a 454, or a small 440, rects will only shine from 4500-5000 rpm on up.( unscientifically speaking). On a 408, that number has to be much, much lower.
I would pretty much copy Todd's 414 ci setup, since its a proven combination at that same ( nearly) displacement.
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1,421 Posts
We run 3700lb 70 velle,10's @134 spinning on the bottle and 11teens@118 1.52 60's N/A with square ports now only 10/1 cr cam is 251°I&E.
When I finish the oval ports we will see what happens.
When I finish the oval ports we will see what happens.
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