Power graph

 

Harvey. "My Kingdom for a shrubbery !"


What supporting mods aid early spool ? (I have YOUR up-pipe, how about the Perrin intake silicon)


Or what supporting mods will increase aid torque ?


A

 

Apostle: you should check out the Scoobyclinic Billet turbo thread. Some 2.5 conversions on there with the SC46. IIRC one made 450bhp and similar torque at 1.4bar, developed by 3k rpm!

There are soooo many variables though!

The SC46 seems to be the best performing turbo of the moment for a 2.5 aiming to achieve 450/450. BUT the MD series now has a billet version of their highly regarded turbos available.

Ns04

 

This is the result of the MD321V on my car



Just posted full details here:-

https://www.scoobynet.com/projects-4...ransplant.html

 

Fred, you must be loooooving it, right?

 

I have to say it makes me smile big time

 

[QUOTE=FredW;9828581]This is the result of the MD321V on my car



always wanted to know what a v would do on a 2.3, nice figures

 

Im having a V fitted to my new engine at the moment, would be nice to get over 500

 

thats easy

 

Apostle: Many things affect spool but I doubt a Perrin intake tract will have any effect whatsoever.
Exhaust, headers and uppipe and turbo, possibly wastegate actuator and mapping are the critical items off the top of my head. Big enough air filter and efficient induction system to a much lesser extent for spool.
Everything has to be joined up and complimentary.
Three good bits and one bad and you may go backwards.
Not only that, what is good for one set up is not necessarily the best choice for another so I look at each installation separately. For instance that is why I have a total of 8# uppipe covering two separate designs. Start another thread with your spec and questions if you like and send me a link and I will have a look.

 

You learn fairly quickly in this game, that there are no dead certs, lol.

 

martyn, perhaps i should of said it was easy to get 500+ on my car with a "v" with 2 different mappers and 2 different dynos, anybody want to buy a v?

 

Much better, lol.
We too have achieved over 500bhp on a V and I rate the turbo quite highly. Like yours it took more than straight VPower to make it past the 500 mark but James will probably run meth too, so no problem there.

 

Martyn, in your experience, which c.380-400+ turbo, on a 2.0L, do you like best on the road? SC40 XT-R, MD321H. or other?

 

i have a MD321S on my 2.5 with v3 sti heads and at 1.5 bar made.....





mapped by simon ( JGM )

 

I have only ever mapped one H and that car didn't do too well. A smidge over 360bhp on VPower.
Based on everyone elses findings of the turbo I put that down to the poor choices of supporting modifications by the owner. Retaining the unmodified and poor condition STi3 topmount for instance, the oe airbox probably didn't help either.
I suspect the new Billet 321H will be fantastic but a little expensive.

Now, as for the SC40, the response is excellent and it hardly loses anything low down compared to the stock VF35. For that next step up from a mapped 350/350 STi 7/8, it slots in their just perfect.
When on top of that you take into account that the SC40 is just £950+, it starts to make very good sense.

 

Thanks a lot - great info.

Unbelievable that the 20g-based SC40 is nearly as fast-spooling as a VF35 - that's plainly mental!

If I can't coax another 30+ odd bhp from my existing TD05H 20g, then I might just have to invest in a SC40 then...

 

so, with the right fuel, mods and a good mapper its easy then

 

Lol, fingers crossed.

 

Hey there,

Did you do anything to improve the 6000+ drop off, suspected inlet hose colapse? Is it a Samco hybrid you're running? I get similar drop off from about 6 but mapper thought it was the turbo running out of puff.

 

Just to add it made over 500bhp on V-power, but at 1.9 bar

 

Yea I rotated the turbo and has custom intake and a modified up pipe downpipe made, pulled like a train. Unfortunately 200 miles after fitting a new set of spark plugs the tip came off one and did a fair bit of scoring to the bore and then got stuck under my exhaust valve burning out the valve and head. Luckly the turbo escaped damage!!!!!

I have had a 2.35 built and am in the final stages of fitting it now

Graeme

 

Thanks for update Graeme. What spark plugs did you use out of interest with what bhp level? Does sound expensive.

Is anyone running upto 500 bhp with hybrid samco inlet and no issues with boost drop from 6000?

 

the plugs I had in we NGK PFR7B's I was running approx 450bhp. my previous set of 7B's were in for about 1 or 2K at 450 bhp but 25K at 370bhp

I guess I was just unlucky, dont even want to think how much I have spent so far on this last round of mods

Graeme

 

Def unlucky bloke but it's one of those things, hard learning curve sometimes. I'll steer clear of NGKs then and I'm now looking at replacing the flexi 90 deg elbow on the hybrid samco with a metal tube...should do the job.

 

my 2.5 fitted with md321s last week mapped by simon made healthy 456bhp still plenty to go.thinking of going rotated soon.

 

MD321X from lateral for Charlie at Surrey Rolling Road



Mapped on Syvecs by JGM, on V-power

 

Now, that must have been mine Martyn. Everything - all supporting mods were discussed with you and Alan beforehand and you were both in agreement that it would(should) achieve over 400bhp! So please, don't suggest it was my poor choice of supporting mods as you and Alan gave them the ok.

To Clarify, it had a modified STI8 topmount intercooler (which had been producing over 400bhp on a previous car), 550 injectors, 255 fuel pump, MD321H, APEXI ecu and later headers, induction system, exhaust etc.

I do find it poor that when you first mapped the car it made 330bhp(ish), when I came to collect the car, I was told that the power is down, but it was making good torque. When I drove the car I agreed it was not producing the goods. Also it was a rather poor condition to hand the car back to the customer in - even the headers were blowing!

After leaving it to you to decide what to do, you changed the induction system, headers and the downpipe (from memory) and it still only made 368bhp??? At the time you said you'd have liked to fit a front mount, however I specifically wanted to retain the top mount. Everyone thought that it should be a higher figure than what it made. I've had offers from other people to take a look - something for the future I think.

Graham

 

^^ That's rough fella ... there's a million & one reasons for it not to make the power IMHO.

TX.

 

^^ uhh ohh, I suspect a slanging match brewing