Where to do Engine Modification

[Turbonetics]

wow,134bhp is pretty good result.

anyway after installing the cams,how much redline can your car take now?

i supposed you also change the valve springs and retainers?

[Zerstorer]

Is the 134 on wheel HP? If so, going from 99whp to 134whp is a pretty impressive NA boost.

[Xiaogary]

My power cut is at 6.6k rpm. Unichip cannot disable the power cut. My tuner claimed it can go higher with more free flow exhaust and removed power cut with stand alone ecu. Now from 5.5K onwards, The exos sounds choky although power climbs continue with great pulling force. The graph looks very linear and should be able to go up more with bigger exos and removed power cut.

 

 

Edited August 3, 2008 by Xiaogary

[Turbonetics]

according to the graph,your car should be able to go up to 7-7.2k rpm in my opinion.

so changing gear at 7k rpm should be optimum.

Edited August 3, 2008 by Turbonetics

[Xiaogary]

But need to find a tuner who can fit a stand alone ECU so as to remove the power cut at 6.6k. Got a turbo charged aveo in other country fitted a Microtech LT-6 or LT-10 I think.

[Qr25vet]

if u run microtech....i'd rather run a carb....more reliable...cos after all microtech also only one mapping...which is no different as having a carburettor...somemore u on load...will have problems...cold start...lagi worse...emanage ultimate would be a better option...

[Qr25vet]

i dont get it...y is there a dip @ 2000RPMs??? that shouldnt happen...

[Turbonetics]

i feel the same

[Turbonetics]

if you can't rectify the rev cut issue,then i think the cams are not performing at its optimum level.

[Qr25vet]

even so...can the components take the high revs? unless hes changed the rods like what he mentioned in the prev. posts and also balance the crank(with flywheel and crank pulley) cos @ high revs vibrtations are always a cause of premature engine failure..not forgetting valve float...

[Turbonetics]

i believe slightly higher(500-600rpm more) than stock redline is still acceptable.

as for valve float,just change those necessary stuffs like valve springs,retainers..etc which is not going to cost alot of money as compare to strengthening the engine internals.

[Vtim]

But need to find a tuner who can fit a stand alone ECU so as to remove the power cut at 6.6k. Got a turbo charged aveo in other country fitted a Microtech LT-6 or LT-10 I think.

what about megasquirt?

[Imuya]

Have been following this thread! Congrats Gary! Glad to see you got it done...

 

A standalone ECU and adjustable cam-gears (or you like to call them vernier cam gears, lol) are what you need.

 

Your more aggressive cams mated on to the stock cam gear's should have quite a bit of overlap, as evident in your lumpy idling. Which also means that the full potential of the cams are not exploited, partly due to your rev-limit as of now.

 

For the standalone, is there a available harness on the market? If not, wiring =

 

Good luck to your on-going project and do keep us updated!

[Imuya]

if u run microtech....i'd rather run a carb....more reliable...cos after all microtech also only one mapping...which is no different as having a carburettor...somemore u on load...will have problems...cold start...lagi worse...emanage ultimate would be a better option...

 

 

Why would you want to run carb if you have EFI?

 

Most ECUs are running on 1 map, what would that be a problem?

[Qr25vet]

yea but they got compensations...wheras microtech dosent have any....esp if u switch on loads and that can pose a problem...also u cant really fine tune them much compared to haltech,megasquirt,MOTEC,emanage ultimate,adaptronic etc.

Edited August 5, 2008 by Qr25vet

[Qr25vet]

i think haltech @ least i know that can tune in SG...megasquirt like unheard of in SG....mostly in USA...

[Vtim]

megasquirt is much cheaper than Haltech and I heard it can control variable valve timing activation, not too sure about Haltech

[Qr25vet]

even so u need a tuner who knows how 2 tune it properly...which i doubt SG has...haltech heard of but not megasquirt...but aveo got variable valve timing? i dunno so please correct me on this...but if he installs adjustable cam pulleys it totally negates the purpose of the variavle valve timing...