Some of your the As to your Qs can be found in post # 2180.

Internals not mentioned though. Although I'm sure Kev will be than willing to divulge...

 

Different car Joz, Dunc ment the one up in flames and post #2180 shows spec for the drag car

 

Hi,

2.1 stroker with STI 9 rods running an SC46 Billet, clearly we have found the limit of the rods.

cheers
Kev

 

yes it would appear so but thats dam good for standard rods, now about this sc42 : >
any graphs for me mr gather on the old 2.0 engine

 

Hi,

so far we dont have any graphs worth putting up.

We did one which cured the problem of compressor surge but did no more power than the turbo it replaced due to engine maxing out, we sold two mail order, the other is on a car which needs further investigation, it has issues.

So the only result so far is we cured a car which suffered badly from compressor surge, oh and we have sold out awaiting a new batch.

As soon as we get one on a car that behaves I will update the thread, meanwhile its brother is doing well in the states as a thread on nasioc shows.

cheers
Kev

 

i htink ill wait for an english graph but worth puting up a link if you have it cheers

 

kev when they back in stock????

 

lol

At first I thought, "What are you on about?!" Then realised, that I did indeed mention "drag car" when I should have written "track car" - as it was the blown up track car that I wanted to know the spec to. Someone must have 'put me off' at the time.

I am indeed the idiot.

 

Hi,

new batch due next week.

They literally are spooling off the shelf.

cheers
Kev

 

Ha. Good one.

A bit like when you bend back, and let go of a deck of playing cards.

 

joz, i should fingers crossed be getting an sc42 when they are back in next week and will get the car mapped beginning of next month on the dyno, so i'll stick the figures up for ya.

 

Brill!

happydude303 will appreciate that too (as will many others ).

 

Hi,

Nasioc link as requested.

http://forums.nasioc.com/forums/show....php?t=2209051

Cheers
Kev

 

yeah like i say ill wait for a good old engilish graph lol cheers thou : >

 

im looking at the sc360 or the sc38 for my p1, would like to see over the 350bhp mark, with spool as close to the vf28 as poss, whats the spool like on the sc38 on a 2.0 say compared to an 18g

was rebuilt 10k ago with

new rings, arp head bolts, uprated oil pump, new sti9 nitrated crank, acl race bearings, new sti9 rods

so should be ok at the power level im after???

cheers mark

 

maps, which pistons is it running. 'Cause if decent aftermarket forged ones, then you've got a 450-500bhp potential motor there!

Even if they're STi nominally 'forged' items, then you're still good for around 400/400.

The 38 is indeed based on a 18g - but better, what with its 33% light billet comp wheel and other fine tuning.

But the 36, 38 and 40 have relatively 'old fashioned' sleeve bearings. The 42 is roller/b and is said to spool not dissimilar to the 38!

Based on your spec (assuming regular STi pistons?), then I'd plump for the 42. That way you'll benefit from really good spool, but with the scope for breaking through the 400bhp barrier...


But let's hear which pistons you're running, and a budget for further mods, first. Then we can offer even better advice.

(Obviously your g/box and drivetrain are another discussion, as we don't know what you've got.)

 

Hi,

if you are after spool then get the SC36 Billet.

You can hear them spooling in the box.

Not that the SC38 is a slouch, its not but it may be overkill if you dont have an FMIC, the SC36 with an uprated inlet pipe will max out the top mount inter-cooler regardless so the SC38 would be sacrificing spool for no top end gains.

Hope that helps make your decision.

cheers
Kev

 

Sorry, I should have made it clear that I was assuming [never assume] maps had a FMIC fitted, bigger injectors, etc. (An assumption made because of the decent rebuild on the motor).

But of course, he still could have the OEM TMIC - so humble apologies for that.

In which case, SC36 Billet all day long, as it will more than max out the TMIC.

Sorry Gaffer, I should have just let you reply in the damn 1st place.

 

hi i should of put up mods ect in my first post, i've fitted the larger newage topmount, didn't want to cut the bumper and splitter up, zorst wise it has an afterburner center pipe and ninja back box, and a better panel filter cant remember which type off hand, i also have a open neck 3" down pipe and another ecu with ecutek not fitted tho

other bits i was going to get were

740's
3 port solenoid
clutch to cope

pistons and gearbox are standard P1 items

cheers mark

 

Well assuming the P1 is fitted with STi 5/6 spec pistons (or are they actually WRX spec items - anyone?) then those are the weakest link in the engine. But the TY754 box is the ultimate weak link. The New Age TM should be good for up to 450bhp odd (certainly over 400). And the 740s should be good for some distance past 500bhp, so no worries there either.

It's up to you how far you're prepared to push it, at the end of the day. If you don't do launches, then 400/400 might be okay for a decent length of time (based on a lot of anecdotal evidence from people running a similar spec on here).

So really, take your choice from SC36, SC38 and SC40 Billets... And even the SC42 r/b Billet! (But I think the SC46 would be taking things a bit too far with respect to the car's spec though).

Obviously, if spool-up is the name of the game, than as above, SC36 (at the expense of ultimate peak bhp). But its prob the wisest choice given the OEM pistons/drivetrain.


A tangible: I run a STi 5 on a FMIC with the relative 'laggy' TD05H 20g, and it's making the upper end of the SC36's capabilities, at 362bhp (a decent 20G + supp. mods should normally make 380-400). Now even with this turbo, the car really flies and I'm not bothered by any perceived 'lag' (in fact, in practice, it's not that bad). So just think what yours would feel like running similar bhp.... but with the SC36's much quicker spool-up?!?! I reckon it'll be fantastic.

 

possibly a bit silly question, but

surley, lag can just be completly eliminated by just dropping a gear

i can induce lag in 6th, at 80mph im sitting around 3100rpm-floor it and you do get some lag, altho its v minimal

but if im driving where i need/want the power i wouldnt do that, id drop a gear

or is this lag people speak of, more the lag i still get in this scenario - altho it feels instantanious?

tbh ive never driven an n/a car with over 250bhp - so its propbably quite hard to comapare response, but id still imagne the "power band" is higher up the rev range anyway so youd still have the "lag" until revs rise.

to me its more about picking the turbo that wont overstrain yoursetup - and a by product is minimal lag.

any engine can be made to be laggy or not - is that totally wrong?

and how do you measure lag?

is there an engineering formula/standard?

 

spend the little bit extra and get the SC40,a friend of mine had one on his p1 and it made 393bhp and 370ftlbs at 1.5bar with better spool than my ported harvey smith 18g,great turbo and well recomended.

 

Yes, cog swapping can get round lag. But that in itself, adds at least a second to your 'planned move', if taking the whole scenario into account. But it is a small price to pay to at least enjoy the feeling of pretty much instant decent boost when you're 'in the mood'.

But, personally speaking, in my older age, I don't particularly enjoy changing down to get around engine response 'issues', on the road. I find it 'tiring', as I really have to be in the mood. Which isn't often these days, due to the relentless 'victimisation' of the motorist, what with Gatsos, red light cams, etc, etc.

So someone like me, would enjoy a much quicker spooling, smaller turbo (at the expense of outright peak bhp gains).

 

i can ubnderstand dropping a gear takes time itself - but if your racing, doing 1/4 mile or any sprints. then you start with the engine at required revs to make the power.

the only time i can see your scenario applying is on the road, where you make a quick decision to accelerate (for whatever reason) and your not in the right gear for doing so anyway

if you think about automatic gearboxes (i dont know about now) but ones i knew as you floored it, the first thing it does was drop a gear?

yeah im being over anaylising here

just seems to me if your wanting to drive fast/ be accelerating then your really going to have your engine ready in the state where its going to produce power.

otherwise then buy nature of how turbos work , your going to have lag

 

Precisely - see last two comments at bottom...


But for the 'lazy' driver, kickdown is less of ballache to 'go through', compared to cogswapping. That's invariably the reason why they buy automatics in the first place (unless they don't have a manual licence). Modern day semi-autos with flappy paddles mode are a great compromise re. 'involvement' vs. laziness.


Yeah, 90% of the time it's simply not a problem, as you're in the mood and already on it (otherwise we'd have all bought a cooking Fiesta, etc).

But sometimes, you're just in 'lazy' mode, and would love the response of, say, a TD04L!

 

You sound just like me..

 

Hi,

I wouldn't bother with squirter's that big, 550.s are far more controllable at tick over and are good for 420 BHP.

Gearbox is the weakest link, with that in mind the SC36 Billet would be a good choice, we have one on a P1 featured in Total Impreza magazine running 360 BHP, spool is brilliant and its such a quick road car just under the limits of the standard gearbox.

Top mount fitted is an STI 8 unit.

cheers
Kev

 

I think Jef runs an SC46 we fitted and his car certainly is not laggy.
Some people confuse lag with the spool point. Obviously there is less lag the higher up the rev range you go to the point that ther is no lag beyond a certain RPM.
My test for spool is 1700 rpm, level road and then apply full throttle in 4th gear and clock 1 bar in terms of RPM. Repeat this in the opposite direction and repeat the exercise 3-5 times each way until the spool point actually stabilises.
In my experience, the right headers, uppipe and mapping will substantially eliminate lag and while a 20G turbo is laggier than an 18G for instance it is not a lag monster, certainly not the ones we produce, carry out engine modifications and mapping.

Entirely correct Jef.

 

Harvey, what do you mean by "spool point", precisely? The definition of it.

Is it the point at which the turbo makes 'meaningful' (not peak) boost e.g. typically 1bar on modded cars? I.e. the point at which you start to subjectively 'feel the shove', if you will?

 

Think it's also called "boost threshold"?