Engine rebuild advice and questions.
Hi all :D
im just about to start my 16v engine build hoping for around 170bhp the plan is not to go forged as i wont have the budget for it this year, But as the car will be getting a fair bit of stick, over short distances (sprints & hillclimbs) im planning on including race bearings and arp bolts in the build, will this be necessary/beneficial? in my head it makes sense but are they overkill? so far in my shopping list for the bottom end i have; ARP con rod bolts ACL race big end bearings ACL race main bearings ACL HD thrust washers OE quality front and rear main seals OE piston rings will all that be a good combo with standard crank, rods and pistons? as i hear the standard bottom end is pretty strong aslong as your not running mega power. Oh and am i missing anything? i know theres plenty of bits ill be bolting onto the block but for the bottom end internals have i missed anything crucial? cheers azza |
My old engine with std bottom end used to get 8250 rpm without issue, the weak point is the hydraulic lifters.
Whats cams/revs do you intend using? |
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cheers dave |
Id echo what Dave said, mine used to go to 7800 a lot and was fine with a bog standard bottom end.
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cheers :) |
I actually rebuilt the bottom end after the rings shat themselves. I didnt see any point in going for race bearings etc, I just asked the local rebuild component factors for decent quality "normal" stuff. Really didnt set me back a lot and lasted absolutely fine.
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7800rpm should do the job, my old engine made 166bhp with TB's/708 cams etc, the 743's should nudge you nearer 170bhp.
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same goes for arp con rod bolts especially consdiering you can get forged rods with arp bolts for £350 --then £100 for bolts seems a waste when have you seen a tu5 wear out crank bearings -- i have never seen it --unless there was another problem and then you would need a crank crank bearings are same size as a cosworth !!! If you are rebuilding because its knocking or using oil thats another matter if not i would leave it alone and just fit your cams oil pressure should be 4bar @4000rpm when hot |
£350 for rods? shudders...
I'd stick to o.e! |
all seals and bearings will be replaced with OE spec new ones. i dont know the history of the engine so its getting rebuilt for sure.
besides its too late now ;) |
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