Okay so the Mk 1 T25 was 350 / 350 on a standard Sti short block with 'normal associated mods' (ecutek, caik, exhaust) . Please correct me if wrong.

Then the Mk 2 T25 (with t.m.intercooler still) was 415 / 430 on a forged Cosworth bottom end and what made the extra power ?

Did they run headers or on ported / standard manifolds ?

What sort of hybrid turbo was used and how early did it spool / make boost ?


Big thanks in advance to T25 supremos (anoraks)

A

 

MKI was a 2.5 bottom end with forged pistons.

MKII was foregd and balanced Cosworth Tall Motor including heads etc.

More power came from a bigger turbo in reality, but able to run reliably on a better engine spec.

Both turbo's were Garrett cores hybridised by Turbo Dynamics.

Both cars saw 1bar below 3k rpm if I remember correctly.

These details I have given are very very high level.

Look at www.type25.com for details

 

Headers and manifolds were untouched JDM spec on both versions. Don't change what is already good.

 

Mk1 come with 2 different engines 04 with just pistons and 05 with pistons and rods.Some earlier cars on the 2004 had nothing changed some were standard engines with nothing changed.

Mine made 1 barr bye 3200 full boost bye 4200 and was in standard form.

Like shaun said the headers were tested against the best of headers and held the own like the standard drop links very good.Mine made 348bhp/381ft trq standard form.

 

Think it came from more boost being able to be run as it was a fully forged cosworth setup. The mk1 as far as I remember had no internal upgrades and the 2.5 is not known for being the strongest block in the world.

 

Not all 05 cars had rods fud, when I had mine and inwas talking with Ian about future mods he said that the engine would need to come out and rods needed to be done and at the same time I think he mentioned bearings to, as you say not all mk1 had the pistons either.

 

So you have conflicting information by three separate people!!

You would be better off speaking to Litchfield Imports to find out the actual details.

 

So you have conflicting information by three separate people!!

You would be better off speaking to Litchfield Imports to find out the actual details.

 

Speak to powerstation also as they informed me about the earlier cars not having the rods and not ian.Ian sent the engines to david at api so who knows whats in them.As ian told me all the cars had the pistons done but that was not right when i stripped mine i informed him about the pistons being standard and he was as shocked as me at the time.

Like shaun said its a hard one if i was buying another one i would not run a mk 1 04-05 at more than 330bhp-350ft trq you would be fine then .Or buy one and put the nice bits in that it does need in my mind.

Mk 2 is the best best but you will pay a higher premium.

 

Why did he tell you the rods needed doing if he advised me that they had the rods done in the later cars 05> very strange hey ste .

 

Cheers guys. I am aware these T25's were in 'continual development' as some might say.

Jdm headers is the bit thats surprised me ... never heard of them. Guess they must be tubular ? and not cast ?

A

 

yes tubular, my hawk has ceramic coated inc the front pipe. std on the mk 2"s

 

nothing wrong with std jdm headers. I dont understand why a mk1 t25 is about same power as a t20 and from whats stated engine probably not as strong as the std jdm 2.0 that was removed. Think a t20 with one of the new litchfield turbos could potentially b a better car. Unless the torque of 2.5 makes it worth the extra expense. You do get more exclusivity with the t25 though

 

Just what he told me fud, the cars started to pop and were sent up to David. Quite sure they were not originaly built there the early
03/04 cars I mean, David would need to clear that up. One of the reasons I got rid of the mk1 t25 was the fact that I had to look into upgrading the internals to take it further as the 2.5 block had not been fully forged where IMO a 35k+ plus car new should of been. Was advised not to run it over 400 as the rods were not up to it and would need to be replaced.

For me the type 20/25 are more about the suspension/handling setup as that was spot on, most well regarded mappers will be able to get the same performance figures and spool times.