LUIS COLCHETE Posted February 9, 2015 Author Report Share Posted February 9, 2015 Hi! I just bought the complete distribuitor. New in a box. Please give me some advices..... I cant add the image..... Thanks, Luis Quote Link to comment
LUIS COLCHETE Posted February 9, 2015 Author Report Share Posted February 9, 2015 Give me more information please.... Quote Link to comment
datzenmike Posted February 9, 2015 Report Share Posted February 9, 2015 Yes it will fit but it is not an improvement over the old one. Just newer. Keep your eyes open for an EI distributor and matching coil from a '79 A14 or A15 engine. It has no points to adjust or wear out and has a higher voltage output. Quote Link to comment
LUIS COLCHETE Posted February 20, 2015 Author Report Share Posted February 20, 2015 Hi! If you please i need a advice from you. As you know im rebuilding a better A12 engine with some performance parts (better camshaft, twin mikunis, A14 Head, a14 Mainfold) and i thinking to improve my cranshaft. It worth or i keep it in original way.. Please give me your advice Many thanks on advance Luis Quote Link to comment
LUIS COLCHETE Posted February 21, 2015 Author Report Share Posted February 21, 2015 Any advice Quote Link to comment
Doctor510 Posted February 21, 2015 Report Share Posted February 21, 2015 Try these guys I've used them for over 20 years Joey Bray AmeriCam 128 South Valencia Suite E Glendora, CA 91741 (626)963-0011 (626)963-0022 amcam124@aol.com http://www.americancustomcam.com Quote Link to comment
datzenmike Posted February 21, 2015 Report Share Posted February 21, 2015 As you know im rebuilding a better A12 engine with some performance parts (better camshaft, twin mikunis, A14 Head, a14 Mainfold) and i thinking to improve my cranshaft. It worth or i keep it in original way.. A12.... bore 75mm stroke... 70mm A14.... bore 76mm stroke... 77mm A15.... bore 76mm stroke... 82mm Seems like you could bore your A12 to 76mm (or 1mm) over size and put either A14 OR A15 crankshaft, rods and pistons in it to make it, a larger displacement A14 OR A15. Quote Link to comment
LUIS COLCHETE Posted February 21, 2015 Author Report Share Posted February 21, 2015 Hi Many thanks for your all answers, but i want to know if i Lightened my A12 crankshaft makes a big diference on engine performance. My doubt is: the engine with modifications will gain more HP and the standard crankshaft will support more pressure on main bearings, or the original cranshaft will support it? The rpm will basic the same. I dont want spent money for nothing... In other way i bought the A12 GX distributor R D412-53K, i want to know if i gain anything with it King Rat? Please let me know where i can find technical information about it (I want to know if i gain some dwell angle) O Once again thanks all of you Luis Quote Link to comment
datzenmike Posted February 21, 2015 Report Share Posted February 21, 2015 If you want to reduce spinning weight get an aluminum flywheel, aluminum driveshaft, magnesium rims and lighter tires. I wouldn't mess with the crank. I don't know anything about the A12 GX distributor R D412-53K distributor compared to what you have. Later A series distributors are high output and electronic... without points. Quote Link to comment
LUIS COLCHETE Posted February 22, 2015 Author Report Share Posted February 22, 2015 Many thanks for your answers I will not change the original crankshaft Quote Link to comment
rusty12ver Posted February 22, 2015 Report Share Posted February 22, 2015 A12gx dizzy has a different advance curve than the standard one. Works well if you have the matching cam. Quote Link to comment
LUIS COLCHETE Posted October 4, 2015 Author Report Share Posted October 4, 2015 Hi! I have stock valve spring on my A14 cylinder head with a regrind cam 266º total intake/exhaust time, Some menbers advice me stiffer springs (what does it meaning?) and his is enough for the cam regrind i have? Double springs is a waste for this specifications? If i buy them i will need buy valve spring seats and retainers too? or my valve spring and retainers will fit the double springs? Im afraid if the engine take more rpm that normal and some valve spring jump out the valve and broken everything? Please advice me because im assmbing the engine and i need to assembly the cylinder head. Or the stoclk valve springs are just enough? Many thanks on advance Luis Quote Link to comment
LUIS COLCHETE Posted October 5, 2015 Author Report Share Posted October 5, 2015 Anybody! Give me your advices Quote Link to comment
tr8er Posted October 5, 2015 Report Share Posted October 5, 2015 Are you racing it? If you are going to push redline with High revs, you will want stiffer springs. Quote Link to comment
LUIS COLCHETE Posted October 5, 2015 Author Report Share Posted October 5, 2015 No im not a racer. I want increase some power on my engine and get some benfits of camshaft regrind and twin carbs. Stiffer springs means more rigid? Quote Link to comment
LUIS COLCHETE Posted October 5, 2015 Author Report Share Posted October 5, 2015 what means stiffer springs? Quote Link to comment
datzenmike Posted October 6, 2015 Report Share Posted October 6, 2015 Stiffer. Holds the valve closed harder. Also keeps the lifter and push rod against the bump on the cam shaft on a high lift cam and at very high RPMs. Quote Link to comment
LUIS COLCHETE Posted October 6, 2015 Author Report Share Posted October 6, 2015 Many thanks for your quicly reply. Where i can find these stiffer springs to replace my stock ones. Please give your technical advices. Give me the shop name? to contact them Which are the diferences between stiffer springs and double springs. What are the best? I want give to my engine a increase of some power and i need to have in safety the valves and all engine. I want to press the gas pedal at red line sometimes and dont break anything. The standard engine i have no problem i can press the acelerator to red line and i dont have any problem, but with a difrent camshaft, twin carbs diferente distribuitor, diferente mainfolds i have my doubts? Please advice me Quote Link to comment
LUIS COLCHETE Posted October 6, 2015 Author Report Share Posted October 6, 2015 Please share to me your knowledges Quote Link to comment
datzenmike Posted October 6, 2015 Report Share Posted October 6, 2015 Here's the thing. The springs you have now may be fine, I don't know. Generally they will work fine at lower speeds but at high speeds the valve train has a hard time staying pressed against the cam lobe and following it when closing. In effect the lifter, push rod, rocker arm and the valve are 'floating' just like a car racing over a hill can leave the ground. A higher lift cam and higher RPMs will do this. This may... or may not be the case here. 1 Quote Link to comment
LUIS COLCHETE Posted October 6, 2015 Author Report Share Posted October 6, 2015 My springs are A14 stock cylinder head... My afraid is the valve lock jump out and is a completely destruition.... Let me know a store to look at good prices, 1 Quote Link to comment
datzenmike Posted October 6, 2015 Report Share Posted October 6, 2015 The valve locks can't jump out. The valve may 'float' but that's all. Another thing to check is, if your stock spring may not compress enough with a high lift cam. Just install one and turn over by hand and see of you can get a proper valve lash clearance. 1 Quote Link to comment
LUIS COLCHETE Posted October 6, 2015 Author Report Share Posted October 6, 2015 Hi! I have the engine completely in spare parts. The only thing that i have in order is the cylinder head. So when i go assembly the cylinder on engine i dont want take it off again. I have to do is: mount it with the original springs or buy stronger ones or double ones. My doubt is the speed of intake/exhaust are increased by the duration of camshaft and the stock springs may not follow it and the engine can run well with perfect strokes if i dont improve any benefits with strong or double springs i will keep the stock ones..... What do you think? Quote Link to comment
datzenmike Posted October 7, 2015 Report Share Posted October 7, 2015 You don't have to remove the head if you later decide you need to change the valve springs. I don't think the valves will open faster but they will open farther. This is like hitting a larger bump in the road than a small one. The valve train may have trouble following the 'bump' on the cam. 1 Quote Link to comment
LUIS COLCHETE Posted November 13, 2015 Author Report Share Posted November 13, 2015 mY a12 actual performance ikenderian grind total intake timing 248º 266º open before tdc 14º 24º close after tdc 54º 62º totalexhaust timing open before tdv 56º 62º close after tdc 12º 24º with iskenderian regring can i keep the original sprocket gear? Its not necessary buy ann adjustable one? I read and i know when a cam is ground, material is removed from the base cicrcle but in my case can i timing the engine with the original sprockets?. and follows the original marks on chain and sprockets? The only thing that i have to do is advance a litle on ditribuitor. Many thanks on advance Luis Colchete Quote Link to comment
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.