Hi,

Martyn at engine tuner has done loads, we have only done one so far.

To be fair, and I am sure Martyn will agree with me on this, the dyno fogures are OK but not mega, yet on the road they are stunning, spool is around 3000 RPM, plant your foot in any gear at this point and all hell lets loose.

I still have to get some graphs up and will attempt to do it today.

cheers
Kev

 

Kev, due to the new SC42 billet having a roller bearing, would you say it'd spool similar/same/better than the sleeve bearing SC40 Billet (and obviously have more top end to boot)?

 

Hi,

with the SC42 bb billet we expect to see spool as good as an SC38 Billet, but until we run one next week we wont know for sure.

Thanks for your interest and input in this thread.

cheers
Kev

 

Cripes - really?!!! Gumph!

I swear to God, that should that end up being the case, I'm certain I'll have one off yer!!!

Is the SC42 BB still £1025.00 +VAT?

 

cheers kev !!!!

 

Oh yes, most certainly will. Sent one customer away with one with a Syvecs and a 5 position boost switch set to it's lowest level and didn't tell him what level it was on. He drove it home and the next day sent me a pm saying he couldn't believe how much faster it was than when he dropped it off as a stock Prodrive car. I pm'd him back telling him to go and turn the switch 4 positions to the right and try it again.
Shortly after I received a text with more expletive deletives than I have ever seen,

Martyn
P.S Update for the 35R Billet coming later tonight

 

Thats great martyn!!! Id have loved to have seen his face after the run on high boost

 

As promised earlier a quick update for our Billet 35R equipped 2.1 stroker.
Earlier this week we mapped the car for straight VPower @ 1.9 bar boost and made just over 600bhp. I mentioned at the time that a Q16 race fuel map was coming and that is what I have been playing with today. Funny stuff, smells like bubble gum but works a treat.
After a bit of low end tuning and a few low boost runs to settle her in, up a smidge with the boost to a nice and comfortable 2 bar and this was the result.



Fairly happy with the 582lbft from a 2.1.
Based on the earlier higher boost result on VPower, we are fairly confident there is at least another 30bhp in the spec at higher boost. But as the engine is still fairly fresh and the owner hasn't even driven it yet, we have decided to leave it where it is for a moment.

Martyn

 

all I can say is WOW.

 

Im even more confident of breaking 700bhp with my billet on Q16 now, just hope the ID1000s flow enough...

 

Just double up Banny, worked for us. We were seeing 68% injector duty on the ID1000's and 54% on the spec c injectors at 4 bar base pressure.

Martyn

 

Hi,

stunning.

Especially when you consider its just a 5% increase in cc. yet it works so well.

Great result, well done.

Cheers
Kev

 

any idea what the spool up is like for a sc50 on a 2.5l?

 

Hi,

in my opinion and I stress my opinion only, the SC50 is overkill for a 2.5 ltr engine, this SC46 is by far a better choice and easily capable of topping out what we feel is the max safe power to run on a 2.5, unless its been re linered of course.

But I stress "my" opinion, which is based on findings running track cars.

Plenty of graphs for the 46 Billet on 2.5 engines, some are on page 32 of this thread, spool is fantastic with a 46 being on full chat at 3000RPM on the road, the SC 50 will be a bit behind it.

cheers
Kev

 

its an open deck block at the moment kev

 

Would the same be said for twin-scroll 50?

 

624 on an open deck block?

 

Hi,

we only rate the 2.5 standard block with forged internals to 450 BHP maybe push it to 475 BHP, the fact that some people claim to run much more is fine but the question, is for how long.

As I stated earlier this is a scoobyclinic rating based on our findings from racing the 2.5 engine for many years, the track is a proper test and cannot be simulated on a dyno.

Back to the topic in hand.....

Billet turbo's.

cheers
Kev

 

Had a look on page 32 to refresh memory ;-),and the spool from a 2.5
On billet sc46 looks immense !!!
It would be interesting to compare to 2.3 and 2.1 too
But if nobodies fitted a sc46 to them it's difficult to know what's the correct mod to do
Next :-(

 

wow some impressive figures coming out now i have the 30r billet on my 2.1 built motor and was happy to reach 500ish but seeing these numbers i want more what power levels would you expect big port jdm avci heads to reach before they need fetling with??

 

Thanks Kev. Just reasuring myself that I choose the right turbo for what Im after. Promise not to go off topic again

 

Hi,

we have run over 600 BHP on standard big port heads, in fact we have seen "fettling" cause problems if not done correctly.

With a 30 Billet the heads will be fine.

cheers
Kev

 

Kev your not the first person who is in the business that I have heard that from but in your valued opinion going from that above that the 2.5 can do 450-475 if forged but going off one of your previous posts above regarding liners. If the 2.5 is fitted with liners

A) what power can this run?
B) which one of your Billet turbo's would you recomend? (Based on a fast road / occasional track day car)

C) based the turbo choice what would the power out out be?
D) at what rpm would you expect it to start making boost and then hit full boost?

Cheers, sorry for all the questions but looking for a new car soon and wondering what way to go as I have to top my old car which was bob rawles old sti 5 built by rcm and himself so its going to be hard but I think I can do it lol.

Thanks in advance for your help

 

The SC50 seems to be far from popular after reading this thread for months.
It's clear that the SC46 is a winner and everybody seems to like it but for some reason i hardly see any reviews on the 50.

Are they being sold ? If so why do i never see any reports/dyno's on them ?

 

What is the highest power bolt on turbo for a built 2.1 ??

 

SC50 Billet

04 STI Type UK (2.0 stock engine)
SC50 billet turbo
GT Spec Headers & Harvey up-pipe
3" turbo back exhaust
Hybrid FMIC
Tial 50mm Q BOV
Hard inlet pipe
Simtek ECU mapped by Simon www.jollygreenmonster.co.uk
ID1000 injectors
Lateral supplied high flow walbro pump (bigger than the 255)
Exedy twin plate clutch

 

Good work Harry. What fuel is used if you dont me asking?

 

I be interested in what fuel also and also is spool much or any earlier than the sc54?

 

Harry, thanks for posting !
All that power on the stock engine ? My goodness, never knew they could handle that power.
I assume the 509.7HP is at the cranck right ?

How is your driving experience as far as spoolup is concerned ?
Looking at the graph it seems that badboy doesn't seem to run out of breath at high rpms...

 

Spool would always be earlier than the SC54 which is a bigger turbo, at least the compressorwheel. This will take more time to spoolup but will make more power in the end.