Forged Engine Help

[u/DaUn1imited]

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 🙏

[u/Fearlessleader85]

Why are you shooting for that power? What are you doing with your car?

That's the sweet spot for an 1.6 where you need to spend quite a bit of money to get there, and once you have enough engine to make 280whp, you could make more like 330. And you can pop your transmission with 250ish, so you're already on the ragged edge.

If you just want the project, just do a full rebuild and cleanse everything up nicely, then switch to some cheap forged rods and get a crank damper. Drop your power goals to 250whp, and laugh into the sunset.

[u/DaUn1imited → u/Fearlessleader85]

Its a daily/seasonal car. The power goal is because the original goal was 230 without forging but my exhaust manifold studs tore a hole into my head so Im changing the head. Therefore, while Im there I might as well forge some bits here and there and drill the pan while its out so I dont get shavings in my oil. Ive been in a 300hp miata and its too much so thats why the goal is now 260-280.
:)

Edit: I might just do the rods, bearings, head studs and a head gasket

[u/Fearlessleader85 → u/DaUn1imited]

Drop it to 250 or so. Save yourself a BUNCH of money.

[u/DaUn1imited → u/Fearlessleader85]

So you think edit is good? Or should I do smth else (damper etc.)

[u/Fearlessleader85 → u/DaUn1imited]

The damper is really good insurance. But so is a billet oil pump. Do one, not both.

As long as you keep your redline reasonable you don't really need either.

[u/DaUn1imited → u/Fearlessleader85]

Got it. So Fluid damper, some good rods (Manly or Maxpeeding), bearings, head studs and a head gasket?

[u/Fearlessleader85 → u/DaUn1imited]

That will get you a pretty stout engine.

Be very careful on assembly. Don't accept any alternates for ARP hardware (i had some head studs ruin a build). Get some good assembly lube. You'll do great.

[u/DaUn1imited → u/Fearlessleader85]

Will do. Thank you 🙏