3Tc Turbo Problems

[pablo escobar again]

manual 3tc t3/t4 hybrid weber setup turbos lagging won't hit boost till 4500rmp running 3inch piping blow thru 32/36 weber big fmic running 10psi its very smooth but lacks power off boost and only revs 7000rpm so not as much fun as could be. already posted as pablo escobar but locked my self out

[altezzaclub]

Ok, it was here-

 

http://www.rollaclub.com/board/topic/64240-my-3tc-with-a-turbo-weber-problems/page__pid__643010#entry643010

 

What is the compression ratio? I would expect lowered compression so off-boost it will be pretty sad.

What sort of cam specs?

 

Any ideas on the mixture when off boost? Got a dyno printout?

[kickn5k]

What is the rear housing size on the turbo??

Also is it the bush bearing Garrett t3/t4 your talking about?

[pablo escobar again]

don't know that much going to tafe to learn more this is all i know Garret to3/to4 hybrid turbo 3tc 1.8l 4 cylinder celica 1981 engine Msd coil craining booster 300mmx600mmx100mm FMIC 3inch piping 32/36 weber carby blow thru set up smiga 4.3 ratio

[altezzaclub]

Did you build it or buy it like it is??

[pablo escobar again]

I bought it as is got a bit of work to do material wise silver strips around wind shield and strip on front of bonnet and interior and definitely down grave turbo to reduce lagg will try and up load photos haveing trouble though

[altezzaclub]

Was it like this when you bought it.. maybe the reason the builder sold it!

 

Sounds like you need to start from the bottom and check eveything, ignition, compression, mixture ratios... and see if he got the basics right to start with.

[pablo escobar again]

Thx will do need to learn heaps knowledge very limited on cars

[oh what a nissan feeling!]

sounds about right. The general sizing of a t3/t4 is approximately gt35/40.

 

So either up the boost significanty to make the lag worthwhile, or down grade to factory s15 turbo for cheap, or gtrs with .63 rear for more $$$.