Posted By: barrakudaman
magnum heads on an LA short block - 08/31/10 12:16 AM
Anyone have any issues with this? I am contemplating putting a magnum top end on my stroker short block. Thanks
Quote:
anyone have anything bad to say about this idea?
Quote:DOn't forget that the factory V10 magnums use 1.7 rockers instead of the 1.6 that V8 rockers cheap upgradeQuote:
anyone have anything bad to say about this idea?
Nope! Sounds like a great idea! I am scrounging together the parts for this swap myself. I am lucky in that my engine is a roller cam LA block already, so I can directly swap in the Mag lifters and pushrods (for the through the PR oiling). I'm gonna use stock Mag heads outta the wreckin yard, and swap in the GM 3.1-3.3 beehive springs
Quote:Quote:DOn't forget that the factory V10 magnums use 1.7 rockers instead of the 1.6 that V8 rockers cheap upgradeQuote:
anyone have anything bad to say about this idea?
Nope! Sounds like a great idea! I am scrounging together the parts for this swap myself. I am lucky in that my engine is a roller cam LA block already, so I can directly swap in the Mag lifters and pushrods (for the through the PR oiling). I'm gonna use stock Mag heads outta the wreckin yard, and swap in the GM 3.1-3.3 beehive springs
Quote:correct even with the 1.6 you have to watch out once you get around .500 lift, You will/should get the guides cut down. All depends on your combo but the 1.7 rockers is another option out there.Quote:Quote:DOn't forget that the factory V10 magnums use 1.7 rockers instead of the 1.6 that V8 rockers cheap upgradeQuote:
anyone have anything bad to say about this idea?
Nope! Sounds like a great idea! I am scrounging together the parts for this swap myself. I am lucky in that my engine is a roller cam LA block already, so I can directly swap in the Mag lifters and pushrods (for the through the PR oiling). I'm gonna use stock Mag heads outta the wreckin yard, and swap in the GM 3.1-3.3 beehive springs
Not sure how good an idea that would be...the mag heads already are a step up with 1.6 rockers vs. 1.5 rockers on stock LA heads. Per a discussion with Patrick, the cam guru, the mag heads are limited on the amount of lift you can run, and 1.7 rockers seem like they would be a tad too much unless you were using a stock cam...right?
Quote:
I am looking at a set of edlebrock performer rpm heads with 1.6 roller rockers and a comp cam XR265 hydraulic roller cam .506" - .506" lift, 216^-224^ duration at .050". The guy wants $1,100 for all this. not sure if its a steal but it does sound like a deal. 3,000 miles on them he said. Im not sure if i will actually use this cam for my stroker motor. i have to do some more research
Quote:
Patrick I've read many of your posts over the years and I have nothing but respect for your views. I simply disagree in this case. True they aren't a ball stud head in a technical sense of the word, but for all practical purposes they are and non-adjustable to boot. Don't forget puny 5/16 studs versus 3/8 on Eddys. Eddys also accept most aftermarket Chevy rockers. Factory magnums also limit your choices regarding intake manifolds. Sure heads and manifolds can be redrilled, but not for free. The Indy/RHS magnum style head can be had with LA manifold bolt holes and shaft style rockers. Plus they claim to have fixed the crack prone areas. By the time you fix all the things that need to be addressed on a set of used factory heads you can buy a new Indy/RHS head cheaper. Judging from what I've read they flow better too. Lastly he is putting them on a stroker which tells me that this probably isn't a quick and cheap "ring and bearing job". Why after building a good foundation try to "cheap out" now. The top half of the engine can definitely make or break you power wise. Put a good top half on the engine and let the stroker realize it's potential. No offense intended, this is after all just my opinion.