B18C7 turbo.....dont use AVO.....read on....

[TODA AU]

What ECU? (Is it the Link that the kit comes with?)
What other mods? (Cams? Bottom end stock? Or modified?)

[EGB18CT]

i believe is hondata s300 and stock motor??

[pornstar]

hey guys.............

some issues i encountered while boosting my dc2r using avo stage 2 turbo kit...............

once it was all installed and ready for tune, i drove it to the workshop, had the injectors installed and ecu and onto the dyno she went..............

3 hours of tuning went buy and we had sorted out the low cam, with boost (8psi) the car made a healthy 145kw at 5000rpm..........

so next was for VTEC and boost...............

we found that once the car was on vtec and at around 6500rpm onwards it was making a wierd ticking noise from the head.....................so we stopped tuning, we couldnt figure out what it was and why, after another 2 hours of playing with the fuel and timing map......(we pulled timing out and gave it more fuel same sh#t)................the car eventually made 180kw at 7000rpm.............(we thought it was a spark issue)

so i was cruzing the car around for a week or so (to work and back, keeping it under 4000rpm) and decided to change a few things...............new dizzy cap, rotor button, spark plugs, new leads..........new vtec solenoid filter and fresh oil and filter............

so back for tuning and hopefully make some power..............

back on the dyno and a more precise map of tuning and away we went........same sh#t.................so i left the car there for them to figure it out.................

next day, the tuner and mechanics had a look at the car and discovered that:
it seemed as though on 8psi once the car got into the vtec range with only 20degrees timing and the correct fuel map, the car detonates its head off.................
the guys at the shop decided to trial and error........
so...............
by disconnecting the internal wastgate sirclip (that holds the flap closed unless the gate is opened by boost pressure) they gave it a run with the flap being held open fully...............the car managed to make a max of 2psi but no detonation at all............
then they gave the car 28degrees timing or so re-did the fuel map, and it again managed 2psi and made a healthy 170kw or so @ 7000rpm with everything going right...........

so the conclusion we have come to............
it seems as though the turbo's rear housing (garrett t28 roller with 0.86 rear exhaust housing) is too small, and is creating too much back pressure as it has a tiny rear exhaust wheel (not enough flow), which causes the exhaust fumes back into the head, which causes the detonation

now please dont get me wrong..........
im NOT slagging on AVO, as the guys there are great and helpfull........just giving you guys some info and a heads up if you own a b18c7..........and want to use AVO's turbo kit

from here, we are now presently about to strip the turbo and get a new bigger rear exhaust wheel put into it (high flow exhaust housing) and put it back together and see what happenes...............

i'll keep you posted.........

if anyone has any questions about the kit or anything related i will do my best to answer to the best of my knowledge/experience, otherwise i will not answer at all.

cheers
Tom

Tom

Ive bolded the important part of what i just read. Can you confirm what you wrote cos it seems to be some sort of error. 170ish Kws at the wheels on 2psi at 7k rpms? is that what your saying????

[STOCK]

Thats wierd, do you have any other mods that would be causing this tuning issue?

I had a DC2 with a AVO stage 2 and no problems like that, my mate had a DC2R with a stage 2 and no problems like that, my workmate had a DC2 with that kit and had no problems like that. It would be a shame if your bagging out AVO turbo world mistakenly.

[STOCK]

Oh and Toda AU aka Adrian tuned mine and my mates dc2 and Bel garage did the DC2R. Possibly contact them directly if your still stuck with this issue.

[Limo]

get ATP to build you a custom turbo.

the dyno is a hub dyno, so its approx 20% more than a roller dyno

[destrukshn]

Thats wierd, do you have any other mods that would be causing this tuning issue?

I had a DC2 with a AVO stage 2 and no problems like that, my mate had a DC2R with a stage 2 and no problems like that, my workmate had a DC2 with that kit and had no problems like that. It would be a shame if your bagging out AVO turbo world mistakenly.

i believe i have one your mates dc2 turbo.
lol.

[IEVAQ8]

I see

How long till your up and running?

Should be some fun once roll'n

not sure when i will have it finished..........

odd, i know a person with a b18c7 with a avo stage 2 kit.
and had no problems whatsoever.
his one ran perfectly fine on 8psi.

like i quoted (the guys at avo and there kit is great), maybe its just my luck that its gone wrong

Tom, look into getting an ATP.com gt28rs with .82 rear housing and t3 flanged (this is the turbo im looking at getting for my build soon to run off a ramhorn and 44mm tial gate, hopefully i can squeeze in a full sized radiator some how and have 330-350hp atw)

These atp versions of the gt28rs is t3 based, .82 so it will flow considerably more than the normal variations of the gt28rs turbos i think there about 1100ish in the states (USD) i reckon you could pick up for 13-1400 shipped if you work around customs duties...

What turbo has James recommended you to step up to?

good luck and keep us posted!

the only prob with changing turbo's to bigger housing means, i gotta change the manifold and modify the cooler pipes and so on................
james recommends the one and only full race manifold with a gt30 series turbo...........still not sure exactly which way i will go

Are you using the OLD type Avo kit?

The new kits like I had on my delsol where a GT28R T3 internal WG.

im not sure deanno, i only got it from them around 5months ago or so...........whats the difference between old and new kit????????????

i've seen a few of the kits, the dump pipe is really close and sharp but never heard anyone having the same issue as you did

yeh......its a shame so far

[IEVAQ8]

What ECU? (Is it the Link that the kit comes with?)
What other mods? (Cams? Bottom end stock? Or modified?)

hey ADRIAN, ecu is hondata s300 and the engine is dead stock................B18C7

i believe is hondata s300 and stock motor??

thats right

Tom

Ive bolded the important part of what i just read. Can you confirm what you wrote cos it seems to be some sort of error. 170ish Kws at the wheels on 2psi at 7k rpms? is that what your saying????

ur correct, although it is on a hub dyno.......the figures i quoted are 100% correct.
im not bragging that my car has made good power on low boost with high timing, its just to compare and allow others to understand my problem

Thats wierd, do you have any other mods that would be causing this tuning issue?

I had a DC2 with a AVO stage 2 and no problems like that, my mate had a DC2R with a stage 2 and no problems like that, my workmate had a DC2 with that kit and had no problems like that. It would be a shame if your bagging out AVO turbo world mistakenly.

like i mentioned in my first thread, i am not slaggin AVO, they are great guys and supply great product, it may just be that i have bad luck with this kit, or like deanno mentioned, the older stage 2 kit......

Oh and Toda AU aka Adrian tuned mine and my mates dc2 and Bel garage did the DC2R. Possibly contact them directly if your still stuck with this issue.

thanks, i may give them a buzz............but i mean, james does know what he is doing in regards to tuning boosted hondas

get ATP to build you a custom turbo.

the dyno is a hub dyno, so its approx 20% more than a roller dyno

yeh......the turbo that i have will prob go to atp for machine work and rebuild/highflow...........again still not sure what im gonna do, and yeh, uir right, a hub dyno does usually show higher power figures

thanks for everyones help and opinions

[STOCK]

i believe i have one your mates dc2 turbo.
lol.

I beleive you do to, i heard your re-doing the bottom end?

[STOCK]

Anyhow hope you get it sorted soon, keep us posted on what you do to fix this problem.

[IEVAQ8]

Anyhow hope you get it sorted soon, keep us posted on what you do to fix this problem.

no worries man............thanks for your advise and recognition, that others have used this same turbo kit on dc2r

cheers