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This is the head that TK did for mine but with a better valve shape than what they were when TK flowed it. i never really liked the valves i got from VAC that i supplied to Tony so i changed them out...
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TK (Tony Knight) Knight Engines is in South Australia so even for me like 1,000km. Rama (RHD) has a digitised port that is very good (need to ship a good checked core) and Grooty also does porting and...
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I found some old images
Rob 2.8 348 whp
A 2.8 with 306whp (tk head)
Rama 2.9L 294whp
Rama 2.7L 731...Last edited by digger; 04-12-2024, 07:24 PM.
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I would do +2mm 44mm Inlet stock 36 exhaust. There is no need for +1 exhaust valve
do you have a build thread.? Most ported heads are no better than stock. I bought one from a well known...
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I’m going by dyno dynamics (most common around these parts) 250rwhp vs 300bhp which is 17%
haven’t directly seen a 300bhp dyno but I will dig out records and by extension its very doable....Last edited by digger; 04-11-2024, 04:30 AM.
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Yeah it’s pointless using bigger valves without machining the throat to suit and also blending to the bowl and reprofiling the short side etc
you don’t need a roller rocker setup as the...Last edited by digger; 04-10-2024, 02:19 PM.
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It adds unknowns when comparing against roller dyno that provide whp readings and roller dyno that measure whp and do a coastdown correction to bhp like done in most of Europe. You would think that they...
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Hub dynos just add another unkown variable and are a waste of time on a NA m20 as there are no traction issues on the roller therefore the extra labour cost is a mostly a waste IMO
Theory...
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300bhp is probably 350rwhp depending on dyno in question.
Are you referring to a streetable m20 engine or m20 in general? For radical valve train I’m referring to cam duration. The roller...
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300bhp is easily doable it’s just the head work is expensive but can be done streetable. Can be done with not so radical valve train to.
300whp which is the unit of measure most rely on...
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Yes, one at a time following the sequence. Back it off so that you break the static friction then tighten in a continuous motion under dynamic friction...
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You have to periodically retorque arps with composite gasket. To do this properly you need to back it off some not just turn until it clicks statically...
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IMO easiest way is the push down the end of rocker, you just need a bit of mechanical advantage to push and a bar bolted to the valve cover rail using the studs to react against. it works easily have...
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i setup a lever to push down on the end part of the rocker and see how much it moves before the valve hits the piston. if needed you can bolt something on the pivot on using the valve cover studs
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there is a difference between factory squish clearance vs optimum. it probably matters more for a NA engine as you need all the help you can get
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120hz is what i use based on what people measured/tested on the old e30tech forumsLast edited by digger; 03-28-2024, 06:27 PM.
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Bear in mind the additional stroke means the rings will run over additional part of the cylinder wall
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May need a spare head gasket but they could use some shims to account for thickness if needed but otherwise that’s it. They will mock it up measure the squish and deduct the delta.
The...
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