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You're producing 13ft lb less than the op and only producing the same HP but at 1000rpm higher rpm
the argument towards against the RS2 is that 438's suit standard inlet manifolds as the long runner lengths work nicely with the high lift short duration of 438 timing but are nearing the upper...
fair enough. shorter intake runners will reduce mid range torque and that doesn't bode well with the 438 cams on standard timing marks, re-time them to 421 cam timing for a better match with something like a RS2.
personally id be going itb's and well ported head
You'll put in quicker times by spending money on a gripper and 5.1 CWP.
all you do by increasing power is move it up the rev range and spend the whole run in second gear (loosing time)
These are about £125 when the 20% off is on,
they're in a different league with regards to quality
These are the same spanners you buy off the snap on van with Blue Point written on them...
Are you over revving it jim?
If so close up the clearances to 0.25mm with thicker shims,
or just tack weld them to the bucket if you want to go full pikey.
These are awesome for anyone else looking I Have 5 ( work issue )
https://www.ebay.co.uk/itm/Durite-Rechargeable-Inspection-Lamp-Ultra-Bright-COB-LED-Magnetic-Swivel-Base/293318177506?epid=2277647095&hash=item444b2032e2%3Ag%3ADDUAAOSwfopdxAay&LH_BIN=1
I have these, absolutely love them
https://www.ebay.co.uk/itm/RED-Socket-Holder-Magnetic-1-4-Drive-Capacity-26-Sockets/362060997444?epid=28011029789&hash=item544c846344:g:lHIAAOSwI0RZhHZq
Snap On still have the best extension bars too with their wobble plus system