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Re-building 202

Hey guys,

I'm still learning, don't know alot about building an engine.
Just want some advise on what to do.
I have a 186 in my hr with a better head than original (don't know how much has been done to it), cam, extractors, twin strombergs, 5 speed, etc.......
Motor is getting a little old now, I think pistons are a bit loose, going through a little oil etc.
I don't want to put the car off the road and i've got access to a red hq 202 (free).
I hear different opinions on which motor is better... 186 revs harder etc. Would I be better off with a 186?
Now, if I was to do the 202 what things can be done, I want it to be pretty quick (Don't want to go backwards from what i've got) but still be able to cruise and at a reasonable price. I will be building myself with a mates help.
I was thinking to start with get it hot tanked, honed and ballanced etc.. should I bore out though, but then again it might need to be.....
Should I use the head i've got assuming it is a 186 head? I'd get that re ported and pollished I think.
I've been told a vk comm 6 carby is pretty good to use, I want to get rid of the twins.

So basicly a quick motor at a reasonable price.....

Any help would be very appreciated thanks.

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oo

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bxuv-2 and I think 3/32 if that makes any sense.
I'm assuming internaly they are what they say...

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oo

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Thats cool, Its not super hot though....
It runs rich as it is dunno why..
When I first got it, it had one 5/32 and one 3/32, dunno why that was so I just got 2 the same...

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oo

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im interested in the twins if u want to sell them. if so whats your number.
sam

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terra

I may look into selling later, might not be for a while.... when I finish the change over. If you leave your number I can call when and if i'm ready :)

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smack them about the head with somthing useless like... a max ellery workshop manual

seriously tho no dont put a varijet on it youll have it

My site

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Hey mate l've got a hr ute running a warm red 186 with a 350 holley and l'm in process of building a hot red 202 with a set of triples. l was in the same position as with what block to go for and did a bit of research and spoke to a couple of engine builders with varying opinions that range from a 186 will probably rev harder but the 202 would have more legs at a lesser rev range.l still love my 186 but lm willing to try something different mind you the engine will be far from being standard.
lm sure this comment will ruffle a few feathers.
l do apologise :-)

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lol no worries.

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my advice: do only as needed to the 202. if it doesnt need a rebuild, dont do it. when you pull the head off, any mechanic worth his salt should be able to see whether it needs boring, or if it has already been bored in the past, etc.

balancing is nice but in my opinion a waste for a street engine. i have built several BUDGET hq race engines that are not balanced and they sit between 3000 and up to 6500 rpm in races.

putting your head on the 202 is probably a step in the right direction, but you will need to check what compression you will end up with by "cc'ing" the head, and calculating piston dish volume and deck height clearance. failing to do this will almost guarantee either too much or too little compression, and either excessive pinging or poor performance. check it, and correct as necessary. aim for 10.0:1.

as for the twins, if you dont want to run them, get hold of a 2bbl manifold and adaptor plate to fit an xe-xf falcon 34adm weber. a really nice carby, they are cheap and economical and have good power when the secondary is used as well. linkages will need to be fabricated but its a very worthwhile conversion.

one of the more recent hq racing engines i have built was simply to put a race head and camshaft into an old gem 202 block, the bores looked quite well used and its already at 060". obviously i set it up properly as with any other - dialled the cam, set lifter preload etc etc. but the point is, on the dyno the damn thing was right up there with a lot of the fresh $3000+ engines. however whether it continues to make this power for very long is the question though!

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Thanks for the help mate, So basicaly you're saying just do head, cam and carby? origial pistons etc are fine.... Just dont know if there are things that should be done to the block itself to make it stronger and last etc...

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You wrote,"balancing is nice but in my opinion a waste for a street engine. I have built several BUDGET hq race engines that are not balanced and they sit between 3000 and up to 6500 rpm in races".
How does you HQ race engine compare to a street engine?
How many years do you get out of one of your race motors?
Balancing a motor isn't just about getting it to rev. The balance of a motor effects bearing life. Race motors are a short term package. A street motor should last many years. So for that reason, balancing a street engine should be a high priority.
By all means, cut corners on a cheap class race motor. But IMHO when it comes to a street motor. Do it properly...ONCE.
Cheers.

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email
Campbells Shed
Postcode 3147.

firstly, it doesnt really compare to a street engine as i dont know too many streets where you can spend so much time at full throttle!

however as far as the cam specs go, i would rate them very highly as having good street manners and the torque band would be ideal for a mixture of driving styles and conditions. so in that respect they have the potential for being an excellent street engine combination, and a real sleeper with that standard single throat stromberg.

i have built quite a few of these engines, and depending on the customer and how hard he/she drives, their budget, and how serious they are all depends on when i suggest they freshen the engine. the biggest factor is the rod bolts stretching under the high rpm of engine braking. bear in mind that the power band drops off after 5000, and they may upchange at that point, but under brakes it is possible to go as high as 8000 rpm. this is clearly what does the damage.

i have one customer in particular that has over 3 years on his engine, it is one of the unbalanced ones. another one has been running well for 3 years also, but i dont have any that have done more than that as up until then i was only building my own and a few selected friends engines. and these ones i freshened every year due to the fact we were revving hard under brakes at the front of the field.

i did not imply that balancing helps them rev, i do know that ideally for longevity you want equal weights on all pistons, rings, rods, and the crank must be dynamically balanced for smoothness, but i sure believe that there will be no worries on a low rpm(under 5000) street engine. hell, you wont even pick the difference, either on the dyno or by the seat of the pants.

by all means, you stick with what you know, and i will stick with what i know. but personally for the street i'd rather spend the $400 on something that will improve power noticably ratehr than something that will help at high rpm, something the average streeter rarely sees regualrly. be honest, how often does your street car see over 5000? and for how long??

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My brother has a HR ute and it had a 186 in it, Still good motor but he paid to get a little work done to it... In the end he got our good mechanic to do the work and had it bored out to a 192 with most other things machined and blueprinted... Even swap the 202 into it while you get your 182 re-worked.... They are string motors and are worth keeping... His ute / engine has NEVER had one problem.. n Beleive me, he aint nice to it one bit.... Tho the mechanic kinda took on the engine as being a kid of his.... Work of pride that thing

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Oh, is that carby cable or mech?

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Put a 350 chev in it.... :)

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