quote:

---

Originally posted by tybrown
[br]Thats right!!!! cosworth engines are the business! i was running 36psi on pump fuel with a t4 turbo..!!!

remember its not a SR20 [:x)]

Phil. so with the "bigger" turbo you have less lag??

i reckon the gt30 is probably the best pick of the latest turbos for an engine thats been modded the old school way or is standard.

260kws at the wheels awesome! hopefully with a rebuild you will make the 300kw!

i hope my gt30r makes 450bhp to the wheels!! if im lucky!

---

quote:

---

Originally posted by tybrown
[br]Phil. i just fitted a gt30r to my rs500 integrale wastegate. i made 400bhp to the wheels on 29psi that was spiked then boost tapered off to 24psi. next run i will be hitting 36psi!!! on pump fuel

THAT was just replacing the standard t4 and fitting the turbo.
im waiting for my dyno tuner to get a program to re tune my webber pectal board ecu. i will let you know the result.

Good choice in turbo for a standard engine!!!! you will still have lag.. probably the same sort of lag a standard t03 engine gives!! which isnt bad considering the final power output!

Good luck with it! hopefully you can get the power desired easily!

---

quote:

---

Originally posted by Phil
[br]It looks like the limitations of this tired old engine have been reached[:p] We made a consistent 260rwkw with alot more grunt through the mid range.The reason for the improved feel on the road was also discovered...boost is in 700rpm earlier,27psi at 4600rpm We fed the old girl 30psi with no gain in peak power...just bringing the power in around 1000-1500rpm earlier.This is a clue as to what needs to happen next in regards to developement

---