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help me rebuild a sierra engine


mk2_escort

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do rings bearings etc, but before assembling get it all balanced togeather flywheel and pressure plate included then spen the rest of the money on the head, port, 3 angle valve seats, bigger springs, cam etc then if you got $$$ left over get some extractors and a carb (or two :twisted: ) and you should be damn close to where you wanna be :D

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i was thinking exhaust and carb/s first. then cam (and valve springs and guides etc), then a bit of head work :wink:

Big carbs like twin 45s with out doing the cam is silly. Will just flood or run like ish. There is no need for twin 45s or even 40s if all thats done is exhaust. Itll prob run worse if anything. Cam and carbs are a combination if you ask me and should be done after the head work.

Also twin 45s and manifold youll have no change from 1g.

If your pulling the engine apart you might as well sus it out internally. Might not give you much power but will run smoother and rev cleaner. Will also be ready for when you do do the cam and carbs,.

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twin 45's are pointless 4 street use. twin 40's are ideal and one of the best and most efficient things u can do 2 an engine 2 gain more horsepower throughout the rev range, is 2 make everything flow better and more smoothly.

exhaust and carbs are commonly considered the most basic improvement (without huge losses) to an engine to gain more power.

yes cams and carbs go 2gether, but you'll get more gains from carbs alone, than cams alone.

and yes carbs will cost alot more 2 do than the cam. you cant go doin everything at once (unless u have the means :wink: )

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dude carbs are gona sting you over a grand where a camgrind can be about a hundy bucks. if you havent got the cam profile which will utilise the extra fueling from your twin 40s or 45s, theres no point getting the carbs in the 1st place, thats what Meth100 was going on about

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dude carbs are gona sting you over a grand where a camgrind can be about a hundy bucks. if you havent got the cam profile which will utilise the extra fueling from your twin 40s or 45s, theres no point getting the carbs in the 1st place, thats what Meth100 was going on about

egzackery

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fair enuf. which is beta tho? a cam grind or a new cam (i realise its about $300). but im looking 4 eitha a club race/hillclimb cam, or a rally cam.

http://www.camshaftshop.com//camshafts/ ... make_id=36

the rpm range 4 these are 2500-6500 and 3000-6800 respectively. im not sure if u can get a cam grind for this sort of application so mayb u guys can enlighten me?

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well since you said youre on a budget id personally go custom grind. just make shure you ask around engineering places and make shure you got someone thats played with pintos before and know their shit, not just your run of the mill rebuilder. i can reccomend a couple of joints depending where you are

edit: just saw youre in napier, so probably best to hit up Atro or PsychoV6 as they are onto it, or you can drive up to Aux :)

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the best thing when building any engine is cleanness. make sure everthing is clean and a tidy, one piece of dirt under the bearings when they go in will distroy them, use a good quality assembly lube and set the cam up properly, you can run 40 mm sidys and extractors with a standard cam set properly with adjustable cam wheel very well.

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  • 5 weeks later...

picking up a going pinto today for cheap as. gonna rebuild this sucker myself over some time so im in no rush. what i wanna know is how much can i safely re-bore it to? obviously im gonna get someone else to do the boreing but the motor is from a mk5 tina so it supposedly has less meat in the cylinders than a sierra.. so how much do yous reckon? i probably wont go for 2.1 tho, maybe like a 60 thou or something...

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