Thread: Engine swap 300tdi to Isuzu 4bd1

Originally Posted by uninformed

theres alot more to worry about than just core thickness in rebuilding a 300tdi even in stock form

This is a stroker kit not an overbore so it wont be any different to rebuilding a standard motor in terms of liners etc. Its based on the brazilian motor just for a standard 300tdi.

Originally Posted by nzlandies

This is a stroker kit not an overbore so it wont be any different to rebuilding a standard motor in terms of liners etc. Its based on the brazilian motor just for a standard 300tdi.

If they are using the 2.8 crank, to get 2.8 litres you must use the 2.8 pistons = overbore

The amount you have to bore (and I've looked at in the past, just can't recall ATM) I wasn't comfortable with.

{edit}

HS2.8 = 93mm nominal bore (stroke = 102.5mm)
300Tdi = 90.47mm, maximum oversize IIRC = 0.5mm

Originally Posted by nzlandies

This is a stroker kit not an overbore so it wont be any different to rebuilding a standard motor in terms of liners etc. Its based on the brazilian motor just for a standard 300tdi.

and REGARDLESS of that (even if it were NOT an overbore) there are still design issues with the 300tdi that dont make it reliable in a WORK vehicle when uping the power and not addressing them

JMO

Serg

Originally Posted by rick130

If they are using the 2.8 crank, to get 2.8 litres you must use the 2.8 pistons = overbore

The amount you have to bore (and I've looked at in the past, just can't recall ATM) I wasn't comfortable with.

{edit}

HS2.8 = 93mm nominal bore (stroke = 102.5mm)
300Tdi = 90.47mm, maximum oversize IIRC = 0.5mm

bugger!

I hadnt looked into it but I was sure it was just a stroker kit. I figured the re-bore was for the crank bearings. Yeah I would like to get some long term feed back on this conversion. The MD power upgrades seem to be more thorough than other guys in that they insist on head mods for cooling etc when upping the power, most others just turn on the fuel. They also dont seem to promise as big a gains either so it is possible that they have done their due diligence on this. I hope so as its a better way to get more power than just pumping more fuel into it. Im guessing that as more 300tdis fall victim to age and get rebuilt that we see a few of these out there.

Personally it would be my ultimate motor if it's any good.
Basically everything would be as per standard but with usable extra power.

If I still have my Tdi when it dies I'm going to whatever pistons fit after the bores are cleaned up and then a ported head,better turbo and intercooler and exhaust,with a good tune up it'll give me all the performance I need.At the end of the day what you want it for and how much you want to spent will determine which way you should go. Pat

Just to put it out there. What would the engine capacity be if you only used the stroker crank and kept everything else stock????

Originally Posted by luke68

Just to put it out there. What would the engine capacity be if you only used the stroker crank and kept everything else stock????

If it was possible to do it you might need different connecting rods as well I suspect. By my calcs using the figures posted above the 2.8 is 2785cc and the 300 Tdi pistons would provide 2635cc (2665cc if max oversize).