BritishV8 Forum: Serious Cams

speedybuick
Rob Franklin

(11 posts)

Registered:
12/20/2009 05:57PM

Main British Car:

Re: Serious Cams

Posted by: speedybuick
Date: December 26, 2009 02:01PM

Art
i'll most likely limit myself to 7-8 psi until i learn a little more about running under boost. using the turbo V6 engine as a baseline for hp estimates i would think it's safe to say that a 300 would make an easy 500 hp with that setup (remember the 231 is basically a 300 engine minus two cylinders( and a larger crank dimensions). the new TA heads are supposed to flow as good as or better than the aluminum V6 heads they currently produce.

roverman
Art Gertz
Winchester, CA.
(3188 posts)

Registered:
04/24/2009 11:02AM

Main British Car:
74' Jensen Healy, 79 Huff. GT 1, 74 MGB Lotus 907,2L

Re: Serious Cams

Posted by: roverman
Date: December 26, 2009 03:29PM

Rob, I hope the TA heads work as well as projected(300 cfm@28")? My Home ported ,Stg II flowed 294 @ .7 lift. I believe Jim Blackwood has a similar build ,with 300" heads and a Ford, "Lightning" blower. Good Luck, roverman.

roverman
Art Gertz
Winchester, CA.
(3188 posts)

Registered:
04/24/2009 11:02AM

Main British Car:
74' Jensen Healy, 79 Huff. GT 1, 74 MGB Lotus 907,2L

Re: Serious Cams/LS 1 firing order

Posted by: roverman
Date: December 28, 2009 02:28PM

= 1-8-7-2-6-5-4-3 Anybody? Sneider Cams,anybody? Hooked on Harmonics? At least we're not driving oil pump and dizzy, off the rear of cam.roverman.

NixVegaGT
Nicolas Wiederhold
Minneapolis, MN
(659 posts)

Registered:
10/16/2007 05:30AM

Main British Car:
'73 Vega GT 4.9L Rover/Buick Stroker

authors avatar

Re: Serious Cams

Posted by: NixVegaGT
Date: December 28, 2009 02:54PM

What are you saying? We should move to a different firing order? What are the implications here…

roverman
Art Gertz
Winchester, CA.
(3188 posts)

Registered:
04/24/2009 11:02AM

Main British Car:
74' Jensen Healy, 79 Huff. GT 1, 74 MGB Lotus 907,2L

Re: Serious Cams

Posted by: roverman
Date: December 28, 2009 06:32PM

Not me sayin-askin. SBB guys sayin best 4bbl., fuel equalization and least harmonics on crank. I have no experience of such. Anybody? roverman.

hoffbug
Tony Hoffer
Minnesota
(323 posts)

Registered:
10/15/2007 05:25PM

Main British Car:
Olds 215 EFI

Re: Serious Cams

Posted by: hoffbug
Date: December 28, 2009 06:47PM

. started new thread..

Edited 1 time(s). Last edit at 12/28/2009 10:13PM by hoffbug.

BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(6404 posts)

Registered:
10/23/2007 12:59PM

Main British Car:
1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS

authors avatar

Re: Serious Cams

Posted by: BlownMGB-V8
Date: December 28, 2009 10:12PM

The Buick boys are doing this and I don't remember the details but I do recall it is a trade off of induction against engine harmonics. The guys who are doing it are 350 builders IIRC and they already have a different intake configuration, so how it would work out for the BOPR I'm not sure. My personal impression is it's along the lines of the flat crank four cylinders. Might be good for racing but probably not that productive on a street engine.

Jim

roverman
Art Gertz
Winchester, CA.
(3188 posts)

Registered:
04/24/2009 11:02AM

Main British Car:
74' Jensen Healy, 79 Huff. GT 1, 74 MGB Lotus 907,2L

Re: Serious Cams

Posted by: roverman
Date: December 28, 2009 10:15PM

Tony, tough question. I think I would start by weighing stock pistons/rods. My forged, +.03 os. 305 sbc pistons/pins are approx 447 grams before re-notching for stg.1, V6 valves. 1k hp., 4340x6",lg jrnl. rods are 599 before narrowing.Isn't the 4.6L crank internal? Anybody? If so, It might may a better option, regarding flywheels, fillet potential during off-set grinding, 1 pc. rear seal and ready for crank driven oil pump. roverman.

Edited 1 time(s). Last edit at 12/28/2009 10:18PM by roverman.

mgb260
Jim Nichols
Sequim,WA
(2384 posts)

Registered:
02/29/2008 08:29PM

Main British Car:
1973 MGB roadster 260 Ford V8

Re: Serious Cams

Posted by: mgb260
Date: December 28, 2009 11:17PM

351 Ford and 302 roller HO firing order was changed for the same reasons. Helps if you have large diameter mains or turn high RPMs.Scheinder cams E-mailed back and said cast iron was wrong material for even hydraulic rollers,even if hardened. The factory cast cams are steel alloy. I imagine Comp cams or other aftermarket retro roller cams are also, thus more expensive blanks. I guess there is no cheaper way to do it. Iv'e looked at chilled Iron(when they pour molten steel into a cold mold) and cryogenic treating. By the time you do all the custom stuff you would be better off ordering an expensive steel billet. I would still like a cast cam gear on it though.

Edited 1 time(s). Last edit at 12/28/2009 11:24PM by mgb260.

roverman
Art Gertz
Winchester, CA.
(3188 posts)

Registered:
04/24/2009 11:02AM

Main British Car:
74' Jensen Healy, 79 Huff. GT 1, 74 MGB Lotus 907,2L

Re: Serious Cams

Posted by: roverman
Date: December 29, 2009 12:33PM

1961 on had cast gear. I never suggested anything other than #8620 for cam,(publicly). For variable cam drive, I believe crank trigger ign. will prove best. I think volume price of $250 for custom 8620 billet will be tough to beat. I'll be using oem. V6 roller lifters in the "Huff" as mechanicals. Should be good durability test.roverman.

mgb260
Jim Nichols
Sequim,WA
(2384 posts)

Registered:
02/29/2008 08:29PM

Main British Car:
1973 MGB roadster 260 Ford V8

Re: Serious Cams

Posted by: mgb260
Date: January 03, 2010 05:20PM

Paul, You are being awfully quiet. You aren't getting secretive like Mike are you? Any progress on the spyder?

pcmenten
Paul Menten

(242 posts)

Registered:
10/08/2009 10:40AM

Main British Car:

Re: Serious Cams

Posted by: pcmenten
Date: January 03, 2010 06:47PM

Jim, I got busy with my 54 F100. I recently got the engine back in it and I've been thrashing the fuel system to fix a problem there. I think I got that fixed today. Next will be the leaking heater core. Then get the windshield wipers working, then ...

I've been scanning the local Craigslist, looking for a Buick 3.8 that being parted out. Nothing so far. But I did find some 16" wheels for the F100. :)

roverman
Art Gertz
Winchester, CA.
(3188 posts)

Registered:
04/24/2009 11:02AM

Main British Car:
74' Jensen Healy, 79 Huff. GT 1, 74 MGB Lotus 907,2L

Re: Serious Cams

Posted by: roverman
Date: January 03, 2010 08:24PM

Paul, as in Buick 3.8, V6 ? Your abandoning your V8 bretheren ? PS., I have 56' F100/440 Mopar.

pcmenten
Paul Menten

(242 posts)

Registered:
10/08/2009 10:40AM

Main British Car:

Re: Serious Cams

Posted by: pcmenten
Date: January 03, 2010 11:28PM

Art, Nah, I'm going to splice two V6's to make a better V8. 440/F100? Welcome to the Dark Side. Nice choice of bodies, but I'll bet you had to box the frame. I've got the parts to swap in a Cordoba front suspension, but I'll probably stick to a Ford for power.

roverman
Art Gertz
Winchester, CA.
(3188 posts)

Registered:
04/24/2009 11:02AM

Main British Car:
74' Jensen Healy, 79 Huff. GT 1, 74 MGB Lotus 907,2L

Re: Serious Cams

Posted by: roverman
Date: January 03, 2010 11:35PM

Box the frame? I'll "wrestle" with that later. It's comming back as a 40 yr.backburner.Eventually to get a "W16",(Rover of-course), in the bed. I was force-fed Mopars as a kid, hence the B-block.

roverman
Art Gertz
Winchester, CA.
(3188 posts)

Registered:
04/24/2009 11:02AM

Main British Car:
74' Jensen Healy, 79 Huff. GT 1, 74 MGB Lotus 907,2L

Re: Serious Cams

Posted by: roverman
Date: January 03, 2010 11:42PM

Box the frame? I'll "wrestle" with that later. It's comming back as a 40 yr.backburner.Eventually to get a "W16",(Rover of-course), in the bed. I was force-fed Mopars as a kid, hence the B-block.

BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(6404 posts)

Registered:
10/23/2007 12:59PM

Main British Car:
1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS

authors avatar

Re: Serious Cams

Posted by: BlownMGB-V8
Date: January 04, 2010 08:37AM

Art, why not one of those Chrysler tank motors? I heard they made pretty good power..

Jim

roverman
Art Gertz
Winchester, CA.
(3188 posts)

Registered:
04/24/2009 11:02AM

Main British Car:
74' Jensen Healy, 79 Huff. GT 1, 74 MGB Lotus 907,2L

Re: Serious Cams

Posted by: roverman
Date: January 04, 2010 11:13AM

Jim, If Nic can have a 4X4 caddy and Mike can have a top secret- 4.02" then I can have a W16 Rover, I want it,I want it ! roverbrat.

BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(6404 posts)

Registered:
10/23/2007 12:59PM

Main British Car:
1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS

authors avatar

Re: Serious Cams

Posted by: BlownMGB-V8
Date: January 04, 2010 05:32PM

Yeah, but weren't those something like 3 or 4 Mopar V8's all jammed together or something? Bet that'd have enough tork for yer truck.

Jim

roverman
Art Gertz
Winchester, CA.
(3188 posts)

Registered:
04/24/2009 11:02AM

Main British Car:
74' Jensen Healy, 79 Huff. GT 1, 74 MGB Lotus 907,2L

Re: Serious Cams

Posted by: roverman
Date: January 04, 2010 06:24PM

Don't want,"torked-out-o'-shape", me want, "Rotus Brosom Sweet 16", kinda like, astro-glide for the hi-way.

Engine and Transmission Tech

tips, technology, tools and techniques related to vehicle driveline components