[Mk2] [Turbo] Just had dyno run. New Gizzmo fitted and torque drifts

[Phill P]

Went to Surrey rolling road today with 9 Skylines,wasn't going to run the car only watch, however a few people dropped out and they needed a min of 10.

Anyway the car is a rev2 turbo and is bone stock with 95000 miles.
Max power came out 205.7 with .5 bar boost and was told it should be .7 bar (doesn't sound much difference )

Was told that the actuator was most probably the cause.
Could barly hear mine over the bloody big fan,max skyline db reading was 123 db.

However I'm happy that it made 200 after 16 years.

Max power for the day was a metallic orange 33 gtst 603 bhp,one car couldn't get on the rollers due to a very low body kit and my friends one has either blown the turbo oil seal or maybe the valves are fubar,still made 384 bhp though.









Comments welcome or free actuators welcome .

Paul :thumleft

[Munnsy]

id be well happy with that result mate
Your looking around 10bhp per psi of boost increase if i remember correctly , which means in theory you are running pretty much stock power.

Thats obviously a very healthy engine You should be pleased.
Do you have any further plans??

dave

[Phill P]

Cheers

Nothing drastic just maybe a mongoose exhaust with a decat,not sure about air filters yet depends on how good an exhaust sounds,oh and a new actuator

Wasn't going to raise the boost as I've read the the exhaust mods alone can up it a bit and I do want to keep it reliable.

Very happy with the car as a whole,not had so much fun with 4 wheels since I had a MK3 3 litre Capri

Paul

[Munnsy]

come from the ford scene ah,
Yeah basic breathing mods and a nice intercooler upgrade would be a great start.
A good decat will make spool a little more resposive, good intercooler will keep temps more reliably low etc.
But then its easy to get carried away.
As for an actuator, you could go all out and run an ebc (electroinic boost controler) which future proofs other mods if you ever decide to go that route, i only say this as by the time you have replaced the actuator plus the labour, and weigh up the difference im sure for an extra 100 pounds, you can bypass the problem and have a little trick unit in the car ready for when and if you take the next step.

Either way though, good healthy figures to work from, get your breathing mods sorted then take it back up to charlie and see what gains you have really made

[Phill P]

Never thought about the intercooler ,any idea what that lot could approx give on a rev 2.

Finding out will be lots of fun

Paul

[Steve-O 2007]

As for an actuator, you could go all out and run an ebc (electroinic boost controler) which future proofs other mods if you ever decide to go that route, i only say this as by the time you have replaced the actuator plus the labour, and weigh up the difference im sure for an extra 100 pounds, you can bypass the problem and have a little trick unit in the car ready for when and if you take the next step.

But you would still need a working Actuator, just putting an EBC on wont sort it as it will just do the same as it is now (an Ebc still connects to the actuator, it doesnt bypass it)


Before gettign a new actuator, have a look at the pipe comming off the right hand nipple of the actuator (the one aiming the back of the car), is this runnign anywhere or is it blocked off? Just 0.5bar sounds like your runnign on actuator pressure and if the car has had a boost controller fitted in the past this pipe will be disconnected and blocked off causing you to run at 0.5bar if it doesnt have a boost controller fitted now.

[Munnsy]

depends really what you want out of it.
The intercooler is really more a saftey thing, cooler intake temps etc will obviously be a good thing.
If i was you personally, i would get the intercooler,
keep your boost at the factory 7/8 psi and run your breathing mods.

If you wanted to go a little way further, you will need a fuel cut defender, then you can run i think (dont quote me on this) a safe 10 psi if you have the intercooler which in theory again should give you approx 20/30bhp increase but please check this first.
The main hold up on the rev2 is mainly the paper headgasket, and your air flow meter.
If you sorted the hg, and replaced with a steel one (be it rev3 toyota one or overpriced hks one) then your ready to run around the 1.2 bar, but im not sure on the limits of your afm, fueling etc.

Do your research on here, theres a wealth of knowledge between the guys here, but as i said start off with basic breathing mods, filter, downpipe, exhaust and a nice intercooler then run that for a while at stock wastgate pressure, then go from there mate.

But be prepared, it turns into a spiral of ££££££££££££££££££££ notes

Keep me posted, will be interesting to see the gains on just the above before increasing boost

HTH
dave

[Razor04]

I thought an MBC or EBC will blind the actuator so it only sees what boost pressure you have set on the boost controller. Obviously the actuator still needs to work but what your doing is using the MBC / EBC to keep the jam the door shut so you can reach & hold say 1bar etc

[Munnsy]

Think you r right actually

[Phill P]

Cheers for the replys chaps,lots to think about and possbly a big can of worms having done a bit more of a search.

Steve-O 2007,I've checked the pipes and all seems as toyota saw fit,its even got JDM dust on it.

Only mods are 16 inch wheels,Tein HR's, a HKS turbo timer and a Momo wheel.

Must have liked the twisty stuff cos it feels like a go kart


Paul

[Steve-O 2007]

I thought an MBC or EBC will blind the actuator so it only sees what boost pressure you have set on the boost controller. Obviously the actuator still needs to work but what your doing is using the MBC / EBC to keep the jam the door shut so you can reach & hold say 1bar etc

from what I have learnt from fiddling with my EBC and MBC you set the MBC / EBC to say 1bar and once the turbo hits 1 bar the EBC solenoid or MBC's ball and spring will then allow the pressure to run to the actuator which then opens the wastegate and stops the boost rising any further. It will then close the pressure off again closing the wastegate (as the MBC / EBC would have lost a little bit of pressure) It might not close fully but just so it builds back to 1bar (almost instantly) it will send pressuer back down the actuator again opening it. dont ask me how many timse a second as I dont know lol.

It must open and close quiet fast too keep the boost at a constant 1bar as if it stays open too long you will just loose boost but if it stays closed too long you will overboost

Please correct me if Im wrong as this is just what I think happens from looking at the 2 controllers and reading about them

Quite clever how it works realy

[Mbland]

Not a bad result mate my stock rev 2 (well apart from a filter and exhaust) made 222bhp @ fly and 186@ wheels on stock boost which on mine was 0.6bar

[Lee @ 3S Service Centre]

if its making a constand 0.5 bar then the actuator is fine and the vsv is not enabled, get it checked out

[Phill P]

Had a look for the vsv,not sure what to look for but tried to follow the pipe from the actuator to under the inlet but the engines a bit and and even the black bodywork is burning my hands

Have done a search and lots of threads on it,VSV Tvis tvsv bbc.....no thats wrong

Any links to pics of the vsv would be handy.

Cheers Paul

[Phill P]

Managed to get under the car to have a look at the vsv...I think and all seems as if Toyota intended.

However if I have read correctly if I was to get an mbc or ebc I could bypass the problem and run stock boost at .7 bar/10.15 psi.

And if I disable the tvsv or was it the tvis (have read to many posts on it),anyway if I did then I could get .7 bar in 1st and 2nd as well.

Does that sound about right

Paul

[RumbleStrips]

I think it's amazing that a 17 year old car is still putting out what more or less what it was when it was new. A testament to Toyota engineering!

[Phill P]

Wish the paint had lasted as well


Paul

[Phill P]

Just fitted a GTS Chris MBC

Blocked the actuator side but didn't unplug blue connector,set it to .85 bar and am getting it in all gears

However its almost at the end of the thread on the mbc,,about to do a search on the subject (hate search engines)

If anybody knows if its ok to trim thhe mbc spring let me know.

It was good fun 2 up,will find out soon what its like with 12 stone less in the car.


Paul

[toyokid]

All sounds good,
particularly the quiet car!

I am pleased that you are enjoying it.

Stephen

[Shmed]

Mine boosts to 0.9 bar without any form of boost control. My VSV is connected so I only get around 0.5 bar in 1st and 2nd. Haven't had it RR'd though so have no power figures.

Sorry, don't know about MBC's.

Have you fitted the exhaust yet?