wagon dec

hi lads .i have a big problem with a version 5 type r in 2009 at the ring the engine let go so got the car home and decided to build it properly it was standard at the time with only light mods as in apexi power fc hks exhaust decat downpipe and walbro pump,so removed the engine and sent it to a reputable builder to have it rebuilt and uprated spec was decided as follows

ej20 closed deck block
nitrided crank
steel rods
wossener pistons
new rcm oil pump
new oil cooler
cosworth head gaskets
heads were found to be from a wrx and one of the cam bearing caps was damaged so sourced a set of second hand type r heads and cams everything was checked and assembled i collected it and refitted it to the car ran it in for 1000 miles and sent it for a remap the figure was 266bhp at the fly wheel ,found an issue with the intercooler seam split so fitted a japspeed front mount kit and a set of afp 550cc injectors remap again and got 318bhp but on the way home was getting knock so went back to get it tweeked wound up with 278bhp taught it was an issue with the turbo so bought a new td0520g and japspeed uppipe fuel pressure reg kit new fuel filter ,simtec ecu with als ,and launch control back for a map today and got 343bhp on the dyno but when out on the road was picking up knock so had to tweek it back a bit so now with the above spec i have 298bhp and very little patients left for this car has anyone any idea where im goin wrong

murray555

iTrader: (9)

Have you checked compression? Where did the turbo come from?

wagon dec

yes checked the compression and it perfect on all four cylinders,turbo is a new tomika td0520g bought from couture auto a dealer in ireland

KAS35RSTI

iTrader: (73)

Put the boost & AFR graphs up

jason_2013

Did you get the heads skimmed and what thickness head gaskets did you use?

sssssteeeee

det, not good stick some NF in the mix. or u could go avcr. i have the alcatek ecu and as i understand it , fuel trimming per cylinder and knock warning on dash engine check light. if your getting detonation with v power clearly it may be cam related timming is unstable underload or of load???? just an idea, ht lead intermitent or coil pack leaking.i overlooked the obviouse once and paid dearly for it 500 quid later one very pricey spark plug, the one nobody likes to change!.

wagon dec

dont know what gaskets were used and i presume the heads were skimmed as they were off a different engine ,i didnt build it just fitted it back in the car after build .i am goin at it tommorrow to do a cylinder leakage test and check the valve clearence also goin to check for blockage or any issue with either manifold

prodriverules

iTrader: (52)

What compression ratio was the engine built with mate?

wagon dec

No idea man would it make much difference I taught mapping would get around compression ratio being a little different than standard if it was different

prodriverules

iTrader: (52)

Having the right CR can be the difference between an engine taking good ignition and not when mapping which is just as important as the amount of boost to make decent power,it can also make an engine appear very lazy in its characteristics.

wagon dec

Oh I wasn't aware of that .this engine is very lazy and also very hard to achieve any good torque from its making 50-60 ft,lbs less than typical for a Scooby engine. Is it better to have a High or lower cr .also any way measure it will engine in place

jason_2013

If the heads and or block where skimmed then your static compression will be raised. I believe cosworth headgaskets are only available in standard thickness for the EJ20 engine. It might not be your problem though, just a thought?

You want lower compression for more boost and timing at the expense of responsives off boost. I built mine for 8:1 static.

wagon dec

i think it may be a compression ratio issue .any way of checking it without stripping the engine

jason_2013

You will get a better idea if you speak to the engine builder. Ideally it will all have been measured properly and the the correct thickness headgasket used for the final adjustment. A second hand head could of been previously skimmed and now skimmed again along with the block, who knows?

But saying all this it shouldn't be so high that you can't break 300 bhp without det?

wagon dec

bit of an update on this lads took the engine out and did a compression ratio check the engine has a ratio of 10.05/1 rang the builder and he has accepted responsiblity and is goin to put things right happy days

jason_2013

I was expecting high but that's higher than I was expecting to see! At least you know the problem for sure now. It's gonna take some thick gaskets to sort that mess out !

wagon dec

engine was with the builder today and he did some work to the pistons and thick head gasket and now it measures 8.3/1 compression ratio so very happy with that RESULT

jason_2013

Cool, time to get boosting soon then!

wagon dec

what power output should i expect on 95 octane fuel i have 550cc injectors front mount and tomika racing tdo5 20g

stedee

iTrader: (4)

I would have thought 350 to 360 something like that

JDMtmx

i have a sti v5 with RA gearbox and front diff no DCCD and some other mods im running an md302 (modded VF22) my car was setup by scoobyclinic in 2011 gets 361bhp im happy with it! my engine was built by Interpro of Bristol in September 2011 all forged internals with the EJ25 bottom end mod I didnt do any of this I purchased my car like this

im running an Apexi Power FC if it helps but am considering visiting bob rawle and getting a proper map done one that i know!

jason_2013

As said around 350-370. But with your mods and the engine set right now it'll feel like a new car and you'll actually enjoy it at last!

Also +1 For the legend that is Bob Rawle.

JDMtmx

95 fuel is dangerous in an STi Engine isnt it causes detonation/knock i always use V Power/Tesco 99 i dont know what fuel super unleaded wise you can get in ireland but im sure you can get VPower?

i dont think you can run it on 95 so all the user manuals say anyway

wagon dec

Can't get any super in Ireland only e5 and I don't trust it because it chemically mixed to be 99 with ethanol ,at least the 95 is straight petrol albeit at the loss of 15-20 bhp over what ye achieve on v power also e5 is hard to find

jason_2013

Using 95 is only dangerous if the cars been mapped for 99 or running a standard ecu. If mapping on 95 then it will be safe, but as op says with a slight drop in power.

wagon dec

Well lads I can finally close the book on this episode .on the dyno yesterday for mapping and got 359bhp and 330 ft/lb torque on 95 octane so very happy with that now for a trip to the ring :-)

brendy76

iTrader: (6)

Well done matey. Not a bad figure at all.

murray555

iTrader: (9)

wagon dec what cured the problem?

jason_2013

Reference back to post #15 and #17

Well done for sorting it out . Now Enjoy!