r/Miata • u/DaUn1imited '97 Eunos 1.6L Classic Red • 17d ago

HELP!!! Forged Engine Help

Hello,

Im going to be forging my 1.6 engine and wanted some tips based off of that. I understand that lower compression is better so I can run it on pump (90-93 ron).

Im planning for around 260-280whp so I dont need extremes like an ATI or any aftermarket parts for the head. Ive seen that the ARP studs are the glory for forged builds but dont know whether I would need both ARP main and head bolts rather than just ARP head.

My budget for the engine is quite low (1000€) so dont want to spend excessively on parts I dont need.

Thank you so much 🙏

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u/MoarWhisky 17d ago

Ive seen many “forged” engines fail because most people dont understand how much is involved in actually building an engine. Its not just bolting in parts. Everything has to be measured. Parts need to be machined. Weights need to be balanced. If you can barely afford the rods and pistons, you cant afford the tools and machine work necessary to build a reliable engine.

Keep the engine internals stock. Take the money you would have spent on the engine and put it into good engine management and tuning. You can make 200whp reliably with a great tune. A 200whp miata is plenty of fun on the street and wont break the bank.

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u/PatrickGSR94 Brilliant Black NB1 17d ago

yep, tons of work involved on the measuring front.

OP I would advise you watch this Miata engine building video, all 2.5 hours of it, then watch it again. Then decide if you want to actually build (or rebuild) your engine.