How much can i Showel the head, 18R?

[sleepin22]

lol, thats not the plan(see my ra25 overhaul thread).

[thechuckster]

oh... then rebuild engine with suitable valves and seats while you're refreshing the car.

[timbosaurus]

meh ... use PULP and when the engine wears out, put a 18RGUE in it ;-)

That's NOT the answer he was looking for!!!!

edit: Damn... he beat me to it

FWIW - I ran lead replacement lube and premium unleaded fuel in my 18R for the first six months after it was back on the road after a rebuild. That was when I thought i'd never do a conversion and have to look after the engine. After having to adjust the valves countlessly as they were pulling through the seats slightly (despite the lube) and burning out a valve (think it was the dodgy tuning of the weber combined with exhuast mani leak) I just gave up and started running the cheapest fuel I can get and no LR lube. The car has been running nearly 2 years with no adverse affects whatsoever. I have no idea where my timing is set... If i hear it pinging i back it off a degree until next time I tune it

[MarkIIRx12]

Hi again

Thanks for all ur answers, i guess i will just have a looksee and see if its worth the effort, kinda sounds like its a waste of time.

Turboing the 18R, hmm that sounds intresting, what needs to be done, and can it be done in a fairly cheap way? not intrested in throwing a lot of money at this engine, but a cheap turbo upgrade could be somethin.

What kinda turbo, manifoilds etc would i need to use?

[thechuckster]

Turboing the 18R, hmm that sounds intresting, what needs to be done, and can it be done in a fairly cheap way? not intrested in throwing a lot of money at this engine, but a cheap turbo upgrade could be somethin.

What kinda turbo, manifoilds etc would i need to use?

it's all custom (intake & zorst) ... personally, i woldn't bother if i had the chance again. Has proven to be very costly and time consuming (for me anyway),

Seeing as you're US based - i'd suggest a 22RE and find a turbo manifold (or make one). They're popular over you're way so parts and experience should be easy. You'd still have the issue of an ECU to run the whole show.

[sleepin22]

That's NOT the answer he was looking for!!!!

edit: Damn... he beat me to it

FWIW - I ran lead replacement lube and premium unleaded fuel in my 18R for the first six months after it was back on the road after a rebuild. That was when I thought i'd never do a conversion and have to look after the engine. After having to adjust the valves countlessly as they were pulling through the seats slightly (despite the lube) and burning out a valve (think it was the dodgy tuning of the weber combined with exhuast mani leak) I just gave up and started running the cheapest fuel I can get and no LR lube. The car has been running nearly 2 years with no adverse affects whatsoever. I have no idea where my timing is set... If i hear it pinging i back it off a degree until next time I tune it

ahhh, the good ol days of super. Are they trying to tell us something? indeed they are! they trying to encourage engine conversions in old cars

[barned01]

if it helps this is from the green book:
fig 4-17
if warpage exceeds the limit, correct it by machinging or replace the head.
Head Surface Warpage Limit 0.05mm (0.0019in)
Maximum Reface Limit 0.2mm (0.0079in)