will cam work in this application?

[grumpyvette]

i'm building a 64 impala ss. engine below. Healthy TH350. Stock 3.08 gears in 10 bolt with stock tires (so far). Car will never see the strip. Weekend driver with some long cruises to the coast. doesnt mean I dont want to scare my wife when I hit the throttle. And yes - there is a question coming...

I've traded into some decent parts (IMO at least). Here is my build:

Late 80s 4 bolt 350 at .060 (1 pc RMS)
Forged 400 crank 10 under for a stroker
6” childs albert steel rods (also have 6" eagle set)
383 forged pistons – don’t have these yet. will probably go probe unless I find some used ones
Timing gear drive – already have this. may go double roller if noise is issue.
Dart Iron Eagle heads – they already have guide plates and screw in studs - springs changed to whatever I need to run cam
1.5 Crane roller rockers
Arp studs everywhere
Victor Jr intake (also have edel RPM)
Holley double pumper - 750 i think.
if i hit 400HP and a good torque #, I'm good...

Whole thing fogged Chevy orange and hidden under stock breather assembly and valve covers, right down to the 283 sticker.

HERE IS THE QUESTION -

I also traded into a serious cam. CamMotion roller 262/273 .644/.630 with 1.5 rockers 110 lobe 106 intake center 23 valve lash. have a full set of hydraulic roller lifters with it.

this sounds like it belongs on the track. I'm all for running it if it will work well. But I'm all for trading it if not. I'd like to stick with roller cam/lifters. I may add a hint of nitrous a little later.

So - thoughts on cam? I like a little lope and a good sound but I want the car to run well. if not this cam, what should I put in it?

Anybody wanna swap?

your kidding yourself if you think for an instant that a stock TH350 and converter and a 3.08:1 rear gear, and running a compression ratio compatible with normal pump octane gas with that cam will work!
an hour or two spent reading links could save you thousands of dollars and weeks of work.
call at least 5-7 different cam manufacturers tell them EXACTLY what your trying to do and exactly what parts you currently have, NOT WHAT YOU MIGHT GET AT SOME FUTURE DATE, and ask for a recommendation, and DON,T DISCUSS what some other manufacturer suggested with any of them, Then select a cam having specs in the middle of the suggested range


viewtopic.php?f=52&t=82

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viewtopic.php?f=52&t=5078

viewtopic.php?f=52&t=1489

viewtopic.php?f=71&t=1715

viewtopic.php?f=71&t=741

yes I know your unlikely to read ALL the links and sub-links UNTIL you find the cam you selected won,t work, and theres a strong urge to just install that cam, to prove I,m wrong!
this is a lesson most of us only learn by screwing up a build!
and then youll start looking for a reason, why it didn,t work like you expected....but if you want to skip the time and cash wasted read the links

YOU MIGHT FIND THE INFO IN THIS THREAD AND THESE two CAMS USEFUL , as ive built several 383 sbc engines that easily exceeded 400 hp using those cams
viewtopic.php?f=69&t=3814

 

[philly]

for a guy thats never going to the track thats a whole lotta racin parts... "liking a lot of lope" is an understatement for that cam. 400 hp/ tq is made all the time and has manners with under .600" lift

if the idea is to paint the motor orange and put the stock airbox on it, i assume the idea of a sleeper is in effect... if so you're still giving yourself away with the big 400 balancer on the front. if you wanted a sleeper that was tame and unsuspecting i would recommend given your tranny and rear gear the folllowing combinatoin for 350 or 355 cubic inches if you didnt have so many parts already:

GM fast burn cylinder heads:
http://www.gmpartsdirect.com/results.cf ... r=12464298
theres a good description on that page but i would buy them bare, part number 12497186
flow at .500 : 266/180

http://garage.grumpysperformance.co...ding-related-links-and-info.10255/#post-55578

port matched with this intake: this is a vortec intake which has the correct bolt pattern for fast burn heads, however fast burns intake ports are .240" raised and this intake is .200" raised so get that extra millimeter and port match this correctly.
http://www.gmpartsdirect.com/results.cf ... r=12366573
the fool proof expertly written process for properly port matching intakes to cylider heads can be found here: viewtopic.php?f=55&t=5378&p=32456&hilit=how+to+gasket+match#p32456



ive run into this carb a couple times lately and it has alot of awesome features people love, seems to be the talk of the town especially the idle adjustment: i think im gonna pick one up and try it out for my next carb project
http://www.summitracing.com/parts/hly-0 ... /overview/



lt4 hotcam comes here inexpensively in a kit with springs and rockers
http://www.jegs.com/i/GM+Performance/80 ... 7Aod6RUAsw
THE G.M. HOT CAM has 218/228 duration at .050 lift, and maximum lift with 1.6 rocker ratio (intake/exhaust) is 525/525. Valve lash is zero/zero and lobe centerline is 112 degrees.


http://www.superchevy.com/how-to/67838- ... 355-build/

with these connecting rods:
http://www.summitracing.com/parts/sca-2 ... /overview/

and a custom forged piston from diamond pistons, shoot for 10.5:1 static compression
http://www.diamondracing.net/products/c ... istons.php


this combo at 34-38* of timing with the carb properly set up should meet your power goals, and ask diamond pistons about any special provisions they have for nitrous, some companies have thicker plasmamoly rings they recommend for the giggle gas, might as well set it up now if its an option down the line. i know we are talking motor combos but i think it would be worth while to invest in a quality stall convertor in the 24-2800 rpm range

for more than you ever wanted to know about converters and stall speed, click this : viewtopic.php?f=71&t=1715&p=9318&hilit=+choosing+stall+converter#p4242

if you keep the combination under 6400rpm and want to carry on the sleeper look you could use LT1 chevrolet corvette/camaro/caprice/impala exhaust manifolds... again port matched on the exhaust side with a mandrel bent 2.5" or 3"dual exhaust. i think spintech makes the best sounding muffler for a sbc... they also make great power

http://www.spintechmufflers.com/?ccUser=

 

[87vette81big]

Pontiac & Oldsmobile V8 engines make the best sleepers.
Few know much about each.
Use stock iron heads ported.
Grind all casting numbers off.
Balancers all look the same stock.
No one knows but you what's inside.
:mrgreen:

 

[philly]

Pontiac & Oldsmobile V8 engines make the best sleepers.
Few know much about each.
Use stock iron heads ported.
Grind all casting numbers off.
Balancers all look the same stock.
No one knows but you what's inside.
:mrgreen:

good friend had a built 455 poncho swapped t/a and the thing hauled ass... left everyone scratching their heads.

 

[87vette81big]

Pontiac & Oldsmobile V8 engines make the best sleepers.
Few know much about each.
Use stock iron heads ported.
Grind all casting numbers off.
Balancers all look the same stock.
No one knows but you what's inside.
:mrgreen:

good friend had a built 455 poncho swapped t/a and the thing hauled ass... left everyone scratching their heads.

Yes they do Phil.
455 with a Real Race Cam.
85-95 degrees overlap. 4-speed Muncie.
2 Inch primary headers. 3-1/3-4 inch Collector.
Dual 3" to 5 "dual. It really comes alive.
Torque still comes on hard at 2k rpms.
Ti adds Revability.

 

[mathd]

455 are torque monster, in a racing application am sure its something very interesting .

 

[87vette81big]

Its hard to imagine the torque potential with correct sized Twin Turbos on a Pontiac 455.
2000 Ft/lbs off idle to redline RPM.