Need help
Dose anyone know how much horse a stock 85 ecm can handle before it needs upgraded. I'm going to do a head and cam and rocker arm swap. I need to know if I need to get it turned. The head specs are 64 cc combustion chambers 195 intake runners 74 cc exhaust runners. 202 and 16 valves. The springs are good for 575 max lift. The cam specs are 204/215 @ .050°. Advertised duration is 269/281. The max lift with 1.5 rockers is 420/442. I'm going with 1.6 roller rockers
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Originally Posted by Todd Burt
(Post 1597004422)
Dose anyone know how much horse a stock 85 ecm can handle before it needs upgraded. I'm going to do a head and cam and rocker arm swap. I need to know if I need to get it turned. The head specs are 64 cc combustion chambers 195 intake runners 74 cc exhaust runners. 202 and 16 valves. The springs are good for 575 max lift. The cam specs are 204/215 @ .050°. Advertised duration is 269/281. The max lift with 1.5 rockers is 420/442. I'm going with 1.6 roller rockers
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Before I put anything in, I would strongly suggest you find a facility near you that will dyno tune. Several scenarios can happen
1. You get lucky and it runs OK, not great, OK for the most part. 2. You don't get lucky and it runs like crap 3. You are limited to whatever will run and have to stick close to stock specs. I realize it isn't as sexy but get a tuner lined up, do intakes and LT headers that will support future mods and then ask him what cam and head combination he likes. From what I have seen, the intake and exhaust suck so even if you get the heads and cam done, you might not maximize your full potential. PS. Why don't you fill up the profile so we know what car, your location, etc we are looking at? So if you need a tool or a recommendation, someone could actually help. You might have to buy them a beer or two though. |
Originally Posted by Todd Burt
(Post 1597004422)
Dose anyone know how much horse a stock 85 ecm can handle before it needs upgraded. I'm going to do a head and cam and rocker arm swap. I need to know if I need to get it turned. The head specs are 64 cc combustion chambers 195 intake runners 74 cc exhaust runners. 202 and 16 valves. The springs are good for 575 max lift. The cam specs are 204/215 @ .050°. Advertised duration is 269/281. The max lift with 1.5 rockers is 420/442. I'm going with 1.6 roller rockers
But as far as the stock computer goes, my car dynoed just shy of 400 to the wheels before long tubes, and she feels stronger now, except when under load at low rpm like I mentioned. When my car was built, it was started without a tune first, and wouldn't stay running (sputtering, coughing, dying). Based off of the info you provided, I suspect you will need a tune. The smaller combustion chambers may change how spark advance is needed. Any cam that is considerably bigger than stock will require a tune as well. So in short: the 85 computer is capable, of at least ~500 crank hp, but you will need a tuner. |
Originally Posted by TheBlaster9001
(Post 1597008121)
So in short: the 85 computer is capable, of at least ~500 crank hp, but you will need a tuner.
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obviously you dont trust my advice ! :lol:
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