Hi guys, I thought I'd post this discussion I had with Jim at JWT and SGP last night, about what my next options are after my AVC-R install...

 

(yep - it's cut for an email to Viking)

 

Feel free to comment, correct me, hang me, shoot me as required.....

 

> Yep, 1400 is the quote I got from SGP - only asking!!!!!

>

> So what fuel are you running when you get 18psi... 95 euro or 98 euro super?

 

> I had a really long chat with JWT and SGP last night about what boost I can

> safely run and what my next options are... it's pretty much like I

> expected.... upto 13.5 psi on stock turbos/injectors/fuel and pop. Apart

> from maxing out the injectors which I think I could go a little further than

> 13.5 psi... (only guessing!), the only real area of concern is the

> detonation. yeah, yeah. That old thing we all love. Henri was saying you

> can't hear it at higher rpm, I have before, but like he says, maybe not always

> though - does worry me. Anyhow apart from giving the engine extra cooling

> like the aquamist - which I didn't discuss with JWT, the main thing seams to

> be getting the heat away from the cylinder to stop detonation, which is

> basically, doing anything to relieve the back pressure between the turbo and

> cylinder which in turn stops the heat returning. So mods like the cat

> replacement, dual pop and intercoolers all reduces the backpressure because

> they easy the flow and stop the turbo from doing so much work....

> sounds okay... wonder how much difference each mod

> makes... and of course those t25/28s have a nice big turbine which virtually

> eradicates the problem anyhow.... mmmm, options, options....

>

> JWT were also saying I could run up to 16psi which is only 30+ bhp - I would

> have thought more than that (over 13.5/14 psi I'm running now) if I got dual

> pop, injectors and perhaps the intercoolers..... now, I was thinking those

> intercoolers are almost as much as the 25/28 turbos. but the cost of labour

> would be the thing there..... mmmm, all food for thought..... of course JWT

> didn't recommend the T25/T28s at $1400, they wanted me to buy the JWT 500 or

> 600s at $2395 or $2995.... A bit of dosh huh.

>

> I've been looking round at the MDM prices too, $390 seams quite a lot for

> what you get... I need o find a $300 price somewhere....

>

> See ya,

>

> Jez.

 

 

Jez.

 

I think it is safe to say that your next big HP mod cost a fair bit of $$$ to do properly.

 

IMHO Bigger Compressor wheels are a must, so are IC's and Injectors at the same time if you plan on running >14PSI. At least that is the plan that im planning to follow, the only problem being im not 100% sure that the stock internals will be happy with the higher pressure. I am therefor looking to get a second engine, drop that in as Stock and get my old one built up a bit( heads, valve job, overbore, forged piston + coatings). This may not be neccesary but it is always better to have a strong base to work from, altho the guy's in the states run like 22psi on stock motors and setups (hmmm)

I have heard of guys welding pistons on much less that that in this country.

 

Did you ask Jim why he didn't recommend the T25/T28's from Gyro ? As they are basically if not exactly the same turbo as the sport 550.

 

Another thing to consider are Will your clutch handle the new power(probably if you already have a sport clutch)and how fast do you need to stop with the new power (V big breaks).

 

Z ya

 

Nico91TT

 

 

 

 

 

Basically, Jim only likes to sell JWT branded goods... (mmmm) ... at JWT prices.... they are good, but a tad overpriced compared with the T25/T28s. But perhaps the build or quality is different. Perhaps the box it comes in is gold plated?

 

22PSI on stock, I think they must be looking at the volume on the stereo instead on the boost gauge!!!