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robins44
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Joined: 29 Dec 2007
Posts: 632

18797.16 points



PostPosted: Tue Jan 15, 2013 12:11 pm    Post subject: Been awhile Reply with quote

Used to frequent this site quite a bit when i was in college.

Got a new question for you guys, i picked up a bunch of small block stuff for a good price from a guy at work. I was most interested in his used dart iron eagle 200cc 64cc heads to replace my 1.94s on my 383. I was hoping they were going to be 72cc chambers but figured therd be a way i could keep my compression low enough for pump gas.

My motor is a 383, with kb hyper flatops with valve reliefs, is there any way i could keep this motor on pump gas with those pistons, or am i looking at dished pistons. If so what do you think a set of these heads are worth in good shape (i may sell them and the other bits to put towards a better suited head if i can make some money on this deal). The part number on the head is 10320010 which tells me there not a platinum. The valves and heads seem to be in good shape, no visible cracks, no bent or burnt valves, just dirty and have some carbon build up.


Thanks


Cody
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robins44
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Joined: 29 Dec 2007
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PostPosted: Tue Jan 15, 2013 1:05 pm    Post subject: Reply with quote

Also i did some math, and with my pistons it looks like id be at about 10.5 to 11.1 with those heads. If i did decide to run these heads what kinda octane would i have to run, could i get away with a mix of 110 and 93?
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Paul P
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Joined: 15 Aug 2002
Posts: 2403
Location: Townsend, Mass.
81572.74 points


1971 Chevrolet Chevelle

PostPosted: Wed Jan 16, 2013 11:52 am    Post subject: Reply with quote

Depends on the camshaft you are running. If you have a subscription to the automath the DCR is what you need to check. That will give you a better idea of the pump gas or not deal.
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2001 Focus 2.0 Zetec
stock cams, bolt-ons and tune
15.63@87 MPH 1/4mi

1971 - Chevelle 408 SBC N/A
6.86@102.5 MPH 1/8mi
10.78@122 MPH 1/4mi
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robins44
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Joined: 29 Dec 2007
Posts: 632

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PostPosted: Wed Jan 16, 2013 1:23 pm    Post subject: Reply with quote

running a lunati voodoo hydraulic flat tappet, 60103 i think

.489, .504 lift

http://www.summitracing.com/parts/lun-60103
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Paul P
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Joined: 15 Aug 2002
Posts: 2403
Location: Townsend, Mass.
81572.74 points


1971 Chevrolet Chevelle

PostPosted: Wed Jan 16, 2013 4:34 pm    Post subject: Reply with quote

I can't run the numbers for you it is against site rules. With the cam card information, bore, stroke, head gasket thickness, chamber size, Ect... It can be figured out. The link to the site does not give you valve open and close data that you need to input in the calculator.
_________________
2001 Focus 2.0 Zetec
stock cams, bolt-ons and tune
15.63@87 MPH 1/4mi

1971 - Chevelle 408 SBC N/A
6.86@102.5 MPH 1/8mi
10.78@122 MPH 1/4mi
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robins44
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Joined: 29 Dec 2007
Posts: 632

18797.16 points



PostPosted: Wed Jan 16, 2013 8:29 pm    Post subject: Reply with quote

The cam card is in pdf form under additional informtion. I'm not looking to know the specifics on the dynamic compression ratio, just what octane requirements the motor would have. In your opinion what octane do you think I'd have to run. Is that fair lol?
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clay
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Joined: 24 Nov 2002
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Location: South Carolina
318129.23 points


1972 Chevrolet Nova

PostPosted: Wed Jan 16, 2013 8:56 pm    Post subject: Reply with quote

My vote is no. I would throw another 10 - 15 degrees duration at it. Since it's hydraulic probably on the 10 degree side. I think you could run it on 93 but it would really push it on the tuneup. You'd have to look at lower coolant temps, airgap intake, correct timing of course and a fairly loose converter to keep the load off until rpm's get up. Mix in some racegas and no problem. Clay
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af2
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Posts: 5558
Location: grassvalley, ca
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1933 Willys Coupe

PostPosted: Wed Jan 16, 2013 9:16 pm    Post subject: Reply with quote

Is it me?? Lets see $5.00 4 times a year adds up to a 30 pack once....

The info for that $5.00 far exceed the price? Yes it does. At 50 I am still learning so looking at all the info is worth every penny.
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robins44
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PostPosted: Sat Feb 02, 2013 4:53 pm    Post subject: Reply with quote

think im gonna go ahead and save for the afrs i want, that way i dont have to worry about race gas or detonation, heads are in good shape, and ready to run. Do you think i could get $600 for them?
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89Gmcsierra
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Location: Hazleton, Iowa
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PostPosted: Sun Feb 03, 2013 2:27 pm    Post subject: Reply with quote

My friends running 12:1 355 and he has no problems with that engine running on 93 with 1 bottle of octane booster. .567/.572 lift 106 lobe separation. so its by no means a small cam. its in a mud truck so just driving socially around town he's fine. but in the mud he's on 100% 110.
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Aerosmith
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Joined: 25 Dec 2002
Posts: 232
Location: Ohio
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PostPosted: Tue Feb 26, 2013 3:49 pm    Post subject: Reply with quote

Hey I've been gone from here for a while too, and here's my opinion on your heads...use them!

The engine I'm replacing was a 11:1 383 with Dart 215 Iron Eagles(non platinum) 64cc 2.55 valves, a Comp XR274 solid roller and a raised plenum team-G with a 800 Pro Systems 4150 and I ran it on 93 on the street, and mixed 93 & 100 50/50 for the track. 40,000 street miles and a couple hundred 1/4 mile passes.

Just my opinion

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robins44
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PostPosted: Sun Apr 28, 2013 7:53 pm    Post subject: Reply with quote

Ended up selling the heads for 650, gonna put the cash towards plumbing my fuel system and running a new exhaust. Thinking of running braided the whole way from tank to carb, whats the best braided hose out there?


Thanks


Cody
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Paul P
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Joined: 15 Aug 2002
Posts: 2403
Location: Townsend, Mass.
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1971 Chevrolet Chevelle

PostPosted: Sun Apr 28, 2013 8:50 pm    Post subject: Reply with quote

Run hard aluminum or steel line in between with braided where you need it in front and back. I used 1/2" aluminum line with tube nuts and 37 degree flares to connect it to the braided stuff front and rear. Just my two cents to save some serious $$.
_________________
2001 Focus 2.0 Zetec
stock cams, bolt-ons and tune
15.63@87 MPH 1/4mi

1971 - Chevelle 408 SBC N/A
6.86@102.5 MPH 1/8mi
10.78@122 MPH 1/4mi
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clay
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Joined: 24 Nov 2002
Posts: 3209
Location: South Carolina
318129.23 points


1972 Chevrolet Nova

PostPosted: Sun Apr 28, 2013 9:41 pm    Post subject: Reply with quote

I'm with Paul 100% on this - hardline will save you a ton of money. Only run braided for flex purposes. I recently did a friends drag Mustang with a motor plate and I ran hard line (steel) all the way to the carb. Also get your fittings from a hydraulic supply store. They're steel but about half what you pay for the pretty anodized aluminum ones. I also run a teflon lined hose for everything - ethanol is not a problem with it and you can get reusable fittings you can put on yourself. Clay
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10sec.et
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Joined: 29 Mar 2006
Posts: 3473
Location: Houston,Texas
346658.74 points


1969 Oldsmobile Cutlass

PostPosted: Sun Apr 28, 2013 10:11 pm    Post subject: Reply with quote

what Clay and Paul said. only thing i will add is dont use that black braided hose. it has leaked everytime i have used it.
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