[Mk2] [Turbo] Over fuelling on dyno!!

[Graeme Shaw]

Hi all
My car has just come back from a dyno run.
Although I wasnt there I sent my dad along with mine as I had a funny feeling something wasnt quite right.
My last power run saw 296bhp. Since then i have stuck an apexi turbo on.

Dissapointed to find it has REDUCED my power to 267bhp.
We believe its massivley overfuelling.

Have been recommended to get an safc to sort the fuelling.
So was gonna get looking for one this week.
However ive been warned by some pretty knowledgeable people to avoid them.
I dont really want to spent the money on a power fc. Is there any other options to help stop it overfuelling? Fuel regulator?

Best
Graeme

[greeny]

Have you got the graph to show where its overfuelling and how much?

[Graeme Shaw]

Ill see if i can get the graphs up.

Some say 267bhp is pretty good for the mods, but im not convinced!

Spent a hell of alot on this car, 5k plus on mods alone and only have 22bhp to show for it!!

Would get better results from a corsa...............

[Nick86]

you stuck an aftermarket turbo and gained less power? i assume you mean filter? maybe heatsoak on dyno?

were both runs on the same dyno? and were they done on hot or cold days?

why get safc and fuel regulator when you can just get power fc and remap for a bit more?
safc to reduce fuelling will not gain you any power though..

[Graeme Shaw]

No, had a regular ct20b and put on apexi roller bearing turbo (its like a hybrid ct20)

Was on different dynos but there were other cars present at both, and they all have similar results.
I did advance the timing when i had my old turbo on and havent checked it since the new one went on, wonder if I should re set it?
G

[RobCrezz]

You put on an aftermarket turbo on, using the standard ECU and expected it to be ok?

How have you spend 5k on mods but not got a standalone ECU?

What apexi turbo is it?

[Dale_V]

looking at your garage, it seems you have maxed out the basic bolt on mods, which i'd agree would give you a fair bit more than 267bhp, I think you should be on about 300ish The only thing you can do is bite the bullet and go for an aftermarket ECU and mapping session, that way you will get the best power out of the basic mods and that turbo of yours, plus reliability, drivability and you will save a few mpg!

[Nick86]

how many degrees is your timing advanced by?

got a graph of your dyno sheet?

[bobhatton]

No, had a regular ct20b and put on apexi roller bearing turbo (its like a hybrid ct20)

Was on different dynos but there were other cars present at both, and they all have similar results.
I did advance the timing when i had my old turbo on and havent checked it since the new one went on, wonder if I should re set it?
G

You should never advance timing on a turbo without lowering the CR.
It sounds like your knock sensor was kicking in and pulling out timing on the dyno droping power. Reset your timing to around 7.5 deg and it should work alot better.

Bob

[jimGTS]

im going back to stock ecu and injectors till i can get hold on another powerFC

id like to ask where you got the turbo? got any pics of it?? id like to know if its similar to mine?? as mine certainly is not like a ct20b hybrid! doesnt share a single part of the oem housing.....

different dynos are likely to give different results....
what style of dyno is it?

[2barGee]

5k on mods !!!! Jesus mate!!! Where wa you buying your parts from!!!

Get a standalone fella, even on a standard rev3 turbo + injectors with a standalone you could get 320fly......if youve done your headgasket.

[Graeme Shaw]

Ive had the car about 9 years and been on here for about the same.
Been told by many I have been unlucky....

I have never spent so much on a car, i wont go into details, but 3 gearboxes 2 head gaskets, new engine(rev 3) 3 turbos. Plus alot of coolant leaks.
Dont think there is a problem out there I have NOT encountered!

Anyway cost of mods. Just on engine!(approx)

Apexi air filter £150
Mongoose exhaust £250
intercooler £600
avcr £400
fcd £20
hybrid ct26 £550
Apexi turbo £650
downpipe £200
fidanza flywheel £200

On top of that:
2x clutches £500
rev 3 engine £1600
suspension £600

Plus wheels and body bits and pieces, dont want to go on cos It depresses me!!

Would sell up but dont think ill get my 20k back!!

[2barGee]

lol I know what you mean mate cars are a black hole for money but when the mr2 is running good its sweet as!!!!

So your running a rev3 engine now (same as me) have a look in my garage ive been running 350bhp for well over a year now with no major problems.....touch wood.

Basically i did bigger injectors, power fc, cc and td06 to get 350 fly.

But i guess if you dont want to spend £££ just get a remap on your set up and that should see around 320bhp max on the standard injectors

[Nick86]

gee man, do you have a dyno graph. would be good to compare bhp and torque at different rpms with my dyno graph just to see the difference. although it is a different dyno on a different day but still, will give rough indication..

[Ren0W]

btw..

I've never seen such a border frontbumper.

[2barGee]

gee man, do you have a dyno graph. would be good to compare bhp and torque at different rpms with my dyno graph just to see the difference. although it is a different dyno on a different day but still, will give rough indication..

hi mate I've got one somewhere I will have a look. It was when my boost controller wa all over the place but you'll get the idea.

[Nick86]

what spoiler is this btw geeman;

http://i191.photobucket.com/albums/z211 ... 2day-2.jpg

where'd you get it from and how much?

[2barGee]

what spoiler is this btw geeman;

http://i191.photobucket.com/albums/z211 ... 2day-2.jpg

where'd you get it from and how much?

hi mate, that's a pic from last yr I actually sold the carbon boot & spoiler 2a mate on here. It's actually 4 sale at the moment in the bodywork section (just the spoiler is left actually)
cheers dan

[gtech]

Just for clarification on Graeme's car......

The setup is Dymo Dynamics, other cars that went on get similar results to what they had on a previous different roller, where Graeme ran as well.

The main difference this time was that this operator monitored AFR's and noted tha half way through the 2nd run the equipment was showing the AFR's flat lining, which indicated to him that it had dropped below 9, so he stopped the run for safety sake, I dare say if he had ignored the readout he would of pushed the car and got more out of it.

The guy running it is very knowledgeable and not out to rip people off, it was he who told us that Graeme's car as massively over fuelling, and yes he was aware that the Toyota ECU does this but in his opinion this was a great deal more than this.

HTH

[JJ]

Its possible unlike the others that run water injection, yours was getting hot on the rollers or saturated before hitting the rollers ( manifold temp probe ) and intakes causing the enrichment.. which will kill off some of the power...

I saw this enrichment once when a rev 3 was rolled with a chargecooler and the water wasn't circulating... noticable black smoke ( richness ) being emitted.