Different day ,different car .................same shit !!!!

I'm off down to Thor to put it on their hub dyno soon .Then we should see .
Engine wise mine is std Z7U ,std turbo ( albeit 0.48 turbine housing ) but it's the std comp trim etc .
Last time out it was 220 so if we reckon on 10bhp/lb then I should be getting towards 250 .That will then prove that all you need to do is fit bigger injectors and management .
Now most of the bugs are out the way the Adapt route should be about £1500 in bits ???? I don't know how much Gt spent

Tony, you can buy new ones from www.summitracing.com for very reasonable numbers.

http://tinyurl.com/bstycr

I'm off down to Thor to put it on their hub dyno soon .Then we should see .
Engine wise mine is std Z7U ,std turbo ( albeit 0.48 turbine housing ) but it's the std comp trim etc .
Last time out it was 220 so if we reckon on 10bhp/lb then I should be getting towards 250 .That will then prove that all you need to do is fit bigger injectors and management .
Now most of the bugs are out the way the Adapt route should be about £1500 in bits ???? I don't know how much Gt spent

If i remember Lee, Noble got it upto 260ish bhp (think the graphs on here somwhere) and that was its lot even with more boost, hence them suggesting the restrictive heads, he had the big turbo fitted.
Hope you get some good results at Thor.

The most I ever got out of the 2.5 was 258 bhp and that was running 1.1 bar - charge cooler, hybrid turbo of unknown spec - definitely had bigger comp wheel than standard, uprated fuel pressure. Hub dyno will mean you have to guestimate the bhp loss through the wheels themselves. My Skyline was 315 at the hubs but only 290 at the wheels on a regular rolling road - transmission loss total about 85 bhp. So I reckon you lose about another 25 bhp or so just turning the wheels. Although Lee has got skinny little baby wheels still so he would lose less. It'll be interesting to compare the shape of the graphs

Found it think they had probs with the charge temps at the time.

That can't be the right graph Steve ???

226bhp ??

It is now

That can't be the right graph Steve ???


2.6 bar ????

Looking at the old posts Lee it was 1.2 bar with the BIG turbo, 1.1 bar looking at the graph

I could pop up there and get a graph but I wasn't overly impressed with the last graph and their general attitude .They were professional enough but not very enthusiastic ..
Mine also made peak power above the rev limit

I'm off down to Thor to put it on their hub dyno soon .Then we should see .
Engine wise mine is std Z7U ,std turbo ( albeit 0.48 turbine housing ) but it's the std comp trim etc .
Last time out it was 220 so if we reckon on 10bhp/lb then I should be getting towards 250 .That will then prove that all you need to do is fit bigger injectors and management .
Now most of the bugs are out the way the Adapt route should be about £1500 in bits ???? I don't know how much Gt spent

That sound like a much more realistic figure power that is I'm refering to.

be interested to see as when I go 24 valve I am going to have to go stand alone as I cant see there being any 610 ECU's going cheap can you?

Price sounds ok thats £30 per BHP I take it though you need to add set up, rolling road etc?

si21

Yes ,setup extra .RR is only used to get a figure .Road tune is far more productive

I notice there's a lot of talk about the limitation of the standard heads being unable to flow enough air to get over 260ish, has anyone had the heads ported/flowed? I know there's some concern in enlarging the standard head due to the water galleries location within the head! Is there any interchangability between the different PRV blocks ie a 3ltr head fit the 2.5 block, 24v fit a 2.5 etc etc?

[stephendell]

Mr Law junior is porting a pair of 2.5 12V heads as we speak so one of the Laws should be able to advise re: proximity to water galleries etc.

From what I saw there wasn't too much scope for opening things up (probably good as this is now considered to potentially be a bad thing these due to reduced port velocity) but there were a lot of lumps and bumps in the casting that could be 'softened' or removed.

The often talked about restriction (285bhp) is that of the manifolds rather than the heads, but we'll have to wait and see how Tony S gets on when he turns the boost up.

Tony L also has penny on a stick valves and higher lift cams in his new engine build but he's binned the original manifolds so there won't be a direct comparison.

AFAIK it's all pretty interchangeable but others can advise better.

On the topic of PRV power found this thread on a PUG 505 forum
http://www.505turbo.com/forum/index.php ... ic=35&st=0