Just a quick question. Is there much difference between the short engines in a tt and an n/a? Or is it down to manifolds and ancileries?

nope its the bottom end that's different ( short block )

 

Block

 

Oil Channels/outlets blocked off

Different Pistons and Compression ratio

Oil Pump not really a problem

 

 

the Main thing that's different is the pistons .. changes the Comp ratio but all so they are not quite as strong

 

Rods/crank/Bearings are the same

so really u can buy a NA short block .. swap pistons and Uncap the oil ways and turn it in to TT block quit easy

if you know how

 

 

Heads

 

Year 89>91 had softer valves and porting slightly smaller Heads same from 91>99 p48 same on all the engines

 

 

NA Cams have different Timing Profile .. very close to the Auto TT cams Pre 94

 

Other cam differents besides auto/Manual

TT 89>94 Shorter old once piece sprockets ( Inlet )

TT 94>99 Longer by 8mm use 2 piece sprockets ( Inlet )

 

and im sure there are some of the TT Engines around 98>99

thats fitted with No VVT

Edited May 28, 201312 yr by MarkDerby

Thanks mate, good to know the difference as I was told they are the same but I was thinking that big ends at least where different.

the Main thing that's different is the pistons .. changes the Comp ratio but all so they are not quite as strong

 

Rods/crank/Bearings are the same

so really u can buy a NA short block .. swap pistons and Uncap the oil ways and turn it in to TT block quit easy

if you know how :)

edited post 2