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Machina

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  • Toyota Model
    RA40 Coupé

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  1. Machina

    18-rc Help

    also posted in toyota performance, sorry. ok, i am in australia [if that matters], and i have a 78 RA40 coupé. it runs a "stock'' 18-rc sohc. i dont want to run a non-crossflow head, as it hampers my performance, and restricts boosting options, due to space contrictions... [temporary blow-through setup, tb03 turbo, 38dgms weber ect]. this car is earmarked for a 1g-gte conversion, so dont just say swap the engine. what i want to know is, are there any sohc/dohc crossflow alternate heads for said engine? and on what vehicle are they most commonly found. thank you for your assistance. M.
  2. ok, i am in australia [if that matters], and i have a 78 RA40 coupé. it runs a "stock'' 18-rc sohc. i dont want to run a non-crossflow head, as it hampers my performance, and restricts boosting options, due to space contrictions... [temporary blow-through setup, tb03 turbo, 38dgms weber ect]. this car is earmarked for a 1g-gte conversion, so dont just say swap the engine. what i want to know is, are there any sohc/dohc crossflow alternate heads for said engine? and on what vehicle are they most commonly found. thank you for your assistance. M.
  3. ohhhhkaaayy, for a custom 4a-gte i say one of these: garrett gt25---good response, ball bearing and can safely boost past 25psi garrett gt 30 as above but bigger, 30+psi garrett gt45 for total overkill drag-racing motors, pick a psi or if you want useless wa|\|k factor, as this will not spool, a trust T-88-34D. or not...lol but go the garretts. M.
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