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Discussion Starter #1
Looking into getting a Blue Thunder Dual Plane intake for my 351C 4v. Requested some info from them this morning but would like other opinions. Right now I have a Edlebrock F 351 4V.
Engine is going to machine shop soon. Cam is hyd roller (Crane P/N 529801) Int. 228 at .050 Ex. 232 at .050 Adv duration In. 290, Ex 294 Lobe sep. 112, Lift In .597, Ex .609
RPM range 3000-6500. All the matching goodies for the heads. Quenched heads 11.0 Comp. Balanced, polished.
3.50 rear, 4 spd wide ratio

The eldelbrock has the smaller runners more like the 2v heads. produces power to 5500.

I researched this cam and although it looks BIG Crane touted its driveablity (ie Some decent low end torque, fair idle and 14 for vac. for a C) Crane recommended a 2 plane intake.

Cannot comment on how the engine ran as I have never had the mach running.

As I am still awaiting the info from blue thunder does anyone know the stats on their intake and how it should match up with my set-up?

Thanks
Mark

Mark Memmer
70 Calypso Coral Mach 1 351C 4V Completed by 8/01
98 Cobra Convertible
93 5.0 Mustang LX (Winter Ride)
00 Volvo S80 (Wifes Ride)
 

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Great links! Wish I could be doing my Cleve all over again, I am happy with what I got but you get the urge to play more when you dig up more info!

69 Sportsroof, 351C, 4spd toploader, Restomod BOSS 429 clone - the one and only (?) 1969 BOSS 351

http://home.swbell.net/boss351/mustang/boss1.jpg
http://stangnet.cardomain.com/user/adamg69
 

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Discussion Starter #4
Thanks for the posts I have scanned both of them before.

Trans ratios, 1st 2.78, 2nd 1.93, 3rd 1.36, 4th 1.1
I may be a little undergeared at the rear with the 3.50 might need to go to 3.70+ down the road.

Vehicle will be a weekend drive with a few trips to the strip and maybe a run or two at our local road course. Car will look like a bone stock mach if not running.

Mark Memmer
70 Calypso Coral Mach 1 351C 4V Completed by 8/01
98 Cobra Convertible
93 5.0 Mustang LX (Winter Ride)
00 Volvo S80 (Wifes Ride)
 

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Who am I to argue against Crane. But 228/232 at .050 doesn't sound that BIG. It's very healthy street cam. Lift is high, but I can't remember "normal" 351C cam specs.
Also, listing this cam as 3000-6500 is just Crane's definition, some other "broader-minded" cam company might say 2000-6500. Basically, listing cam rpms means that x per cent of power is available between these limits. And because this isn't universally true, there is no common X as there is .050 lift durations. Sorry, this might have sounded simple, but it just came, couldn't help.
Very sweet combo altogether, bit high on compression though.

Door handle first when cornering<P ID="edit"><FONT SIZE=-1>Edited by Arto65FB on 04/26/01 02:08 AM (server time).</FONT></P>
 

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Hey fellow Mach owner,
I just finished my 351C although the cam i chose is a little more reserved. Someone asked about stock 351C4V cam specs they are around 440 lift on intake and exhaust not sure about the duration. You are running 11:1 compression, i'm wondering how you are going to deal with detonation, do you think you'll have any? My hyperutectic pistons bring my compression ratio up to 10:1 after head resurfacing. Also are you running a 4 speed or auto tranny?
 

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Discussion Starter #7
Running a Wide Ratio 4 speed
I think I can get away with pump gas with the quenched heads. Have talked to others that seem to have no problem with 94 octane. If it becomes a problem I guess it will be race fuel.
What pistons are you using. KB177's what size comb. chamber?

Mark Memmer
70 Calypso Coral Mach 1 351C 4V Completed by 8/01
98 Cobra Convertible
93 5.0 Mustang LX (Winter Ride)
00 Volvo S80 (Wifes Ride)
 

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I have about 11:1 compression ratio and have fought detoanation tooth and nail. First I backed off timing all I could. That didn't solve it, started bumping up the octane, that solved it. Then I tried slightly lower temperature plugs (NGK UR6) and hey presto, no more detonation. I am wheening it off the octane now, each tank gets closer to pure pump-gas (93 here in TX), still running great - no ping. Other things that changed along the way and may have helped: Crane Hi-6 ignition, big mother LX-91 coil and regapping the plugs to 0.045. I run about 12 deg initial and 31 total timing - all centrifical and in by about 2500 rpm using an MSD billet distributor. Running on top is a 750 cfm vac. secondary, only mod is 5.5 Hg power valve. no re-jetting was needed, if anything I run a hair rich. I love the way it runs! Get the Blue Thunder, if you don't like it I'll trade ya!

69 Sportsroof, 351C, 4spd toploader, Restomod BOSS 429 clone - the one and only (?) 1969 BOSS 351

http://home.swbell.net/boss351/mustang/boss1.jpg
http://stangnet.cardomain.com/user/adamg69
 
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