Hows it goin fellas, im just after some info from people with 18g’s on classics preferably UK cars running standard internals and gearbox.

At the minute ive a VF35, STI 8 top mount, fuel pump, FPR, 440’s and an apexi PFC running 1.3 bar max and the car has been fine for about 8 months….

Im thinking now of going TD05 18g, 550’s and a remap with NF octane booster this time(as we don’t have V power in N.Ireland), just wanted to know what boost u fellas are running, roughly what power output and how has the gearbox and engine stood up to it.

I realise driving style has a lot to do with it and im not hard on the car at all never launched dragged or tracked the car is a MY99 turbo 2000

Cheers mates!

 

I'd like to know this too (sorry to jump in!), as im looking at upgrading from my 16g.
Can you get more power running an 18g at 1.3bar than a 16g running 1.3bar?

Mit

 

i have an afp 18g for sale i think the car it came off made 386bhp & 360lbft @ 1.7bar boost on a 99uk turbo with hybrid fmic, 550s, gt headers, decat & vortex
sadly the bottom end did fail on the car after approx 6k miles but 386bhp on uk standard internals

 

I'm running one of AndyF's 18g's, 550's, SYMS equal length headers, HKS fmic, Apexi ECU, etc...never been on a dyno but at 1.6bar it out drags my friends 355 F1 up to 135\140

Still on a standard MY00 bottom end but I am running a P1 box. Details here if you are interested; https://www.scoobynet.com/projects-4...on-fettle.html

Ian

 

Ns04 is ever the pragmatist:

Can you afford a 6 speed/PPGreplacement if your current box lets go after the upgrade?

If yes, go for it, if no, don't!

HTH

Ns04

 

edited for accuracy

 

i dunno if i would wanna run it at 1.7 bar i was thinkin more 1.5 max on octane booster, how much is a P1 box or STI V5/6 these days just so i know to start saving lol

 

lol well at the min i cudnt afford a new box def not a PPG!...im thinkin this would be my last stage of tuning as above this is gonna be proper ***** out forged engine, ppg box and all that goes with it, in other words 1000's in cost!

i know it is a lottery but i take some comfort from the fact that quite a few on here seem to be doin this upgrade and the engine/box has survived, for a while anyway.....the VF35 just isnt givin me the hit i need and i expected more form it when i done all the bits, but it def isnt 330-340bhp as alot of others seem to be gettin with VF35 upgrades, maybe poorer quality fuesl over here and 1.2 bar isnt getting the moist from the VF

 

I was ripped off a couple of years back and brought an alleged immaculate P1 box and diff for £800...then spent another £500 repairing it Not sure what they go for these days.

 

if 18g mapped say 1.4ish bar to around 330-350 and similar torque that should be ok for a uk ,its more the torque remember that eats gears also i thought the p1 had the same 5 speed box as a uk anyway 3.9 ratio final not the 4.1 like wrx sti ect and not the ra 4.4

 

P1 box is exactly the ame as the sti5, which is why I had to change my diff

 

so a 4.1 ratio cool that i did not know

 

i reckon frig it then just get it done and see how the box goes, if it breaks it breaks, its not my daily driver anyway so wouldnt be a huge inconvenience....wud be **** if it went first time i floored it though lol.

 

some boxes are stronger than others; the later classics were supposed to have had the strongest (other than sti variants of course), but I broke two with the standard TD04

there are lots of thread on here which will be able to give the the code to look out for, sadly I'm too much of a simpleton to remember any more than; TYN.......????

 

can i ask why your only running 1.2 bar boost on your vf35? that's why your not getting a kick out of it,lots of peeps on hear are running 1.35 to 1.5 bar which then makes it a nice quick car

 

it was mapped for 1.3 max, think that was as far as andy wanted to map it to, i think mapping it on 97 ron fuel might have had something to do with it at the time...

but lately on 1.3 it had been spiking to approx 1.4bar on cold nights and hitting boost cut, i dont know if boost cut was set at 1.4 bar but im assuming it was and in 2nd or 3rd coming off a roundabout build the boost up and floor it, it just cut the power and let a few big cracks out the exhaust???
i think its actually goin nicer at 1.2, but it just isnt quick enough!lol

 

Mine is mapped to peak at 1.35bar and run on Vpower. It produces 343ft lbs which isn't far shy of what some folks have reported with the Td05-18G.
One thing I didn't notice was that the FMIC made a big difference to the kick the turbo gave! It came in much more aggressively, presumably due to the ignition advance possible with the FMIC over the TMIC. If yours is mapped for V power and a TMIC then presumably you'll be running even less ignition advance in the map.....maybe that's partly why you're not getting the kick you want?

However, two factors that will definately contribute and can be resolved with less effort/expense.

1) You'll also not be running in gear boost compensation on your ECU, so you'll get lower rates of boost climb and peak boost in the lower gears.

2) I also found that the ECU drive by mode really blighted my car with my driving style and would frequently cut the boost too.

I got around the above two issues by installing an AVCR set up when the car was remapped.

It certainly shifts now!!!

Perhaps the best move for you is optimising what you've got before you move on? My concern is that even if you go to the 18G, you won't get as much out of it as you'd like as you're still dealing with the limitations of the boost control on the ECU and the pesky drive by mode and, of course, many get their cars mapped for higher octane petrol.

You could go for a Simtek ECU get two maps: one for 97+Octane and one for just 97. That would overcome the boost limitations of the std ECU and allow you to run mafless. Sorted without the need to change the turbo and bust your box!


Ns04

 

I am no expert but i had the problem when coming off roundabouts in 2nd or 3rd, mine was jumping to 1.5 when it is only mapped to 1.45. I worked out that it only happened when my fuel was below 1/4 of a tank. I now always keep it above half a tank and touch wood havn't had the problem since.

 

ya know matt its weird u shud say that man, any time its happened ive been low on fuel, like sometimes on the petrol light!?maybe she wasnt gettin the fuel through so the car has cut the power?

a few other things i should add, as yet i havent fitted a proper undertray and am still on the original bonnet scoop.

no matter what way i look at it i will have to make the most of it, ie im paying for a remap again so i may aswell go a bigger turbo than get a few extra psi from the Vf35, the 440's seem to run anywhere up to 90% at WOT so 550's would not be a bad idea i think...if i could get a genuine 350bhp from the VF35 id be happy i think but at the min i doubt its even over 300bhp

 

Go to Simtek, rather than Ecutek remap would be my advice, will help get the most out of the bigger blower.

Ns04

 

Great advice, that's my next move, with individual boost control for each gear you get to keep silly 1st, 2nd and 3rd without compromising safe boost levels for top Dual map means you can run a Meth, race fuel or whatever mix too Knock correction for each individual cylinder too iirc

 

I have just recently had my 18g fitted and map tweaked, it made 365/340 and bloody hell does it shift. Boost is set at 1.4 peak tailing off a little. I have had the td04, vf28, vf35, td0516g and the 18g in my opinion is far the best of the bunch that's been on my car. Spools quicker than the 16g but just doesn't let up. Still on standard internals and box.

 

Would you notice a difference,straight swop for the 16g,same mods with re-map?

 

I know of a fella with a 16g and supporting mods (ECU, fmic, etc etc), he made 356bhp, with 350lbft of torque at a rolling road recently, and the car does a 1/4 mile in 12.3 seconds at 111mph ....not bad eh

 

would this be a certain RB5 Kev?lol
R ya still on the 16g mate?

 

mate i think that post has just made my mind up for me!

 

Thats me matey ....trying to get a big build underway at the min....funds permitting though lol

 

thats a really good figure on a 16g...did i remember u sayin u had an 18g and 550's to go on a while ago?

 

Bit slow for the power, IMO.

Andy F showed me a graph a while back when I was chatting to him about 18g's.

18g + 20g overlaid. Wasn't really that much difference between them in spool up etc.

 

earlier in the year i paid £550 for a late sti gearbox from grade a subaru and they chucked the diff in with it