is CT26A too big for a 1.8L?

**CHB** · 04-02-2008, 03:12 PM

but we have a lot of ppl running his type of setup here.. never see any one pop an engine before.. i was seriously doubt about his setup but he has proven to me..

**o_man_ra23** · 04-02-2008, 03:27 PM

He hasnt proven it to me... the computer he is running cannot compensate for boost properly, and therefore will turn his motor into a grenade. Of course if he has a piggyback, thats a different story, but just an NA ECU on its own will not work properly. Sorry if I sound arrogant, but as an electrical engineer specialising in automatic control software programming... it just doesnt work like that.

**CHB** · 04-02-2008, 04:27 PM

yeah i am having the same opinion as yours. anyway, we forget about his setup. now back to my engine.. :-)
by the way, i've found out that my spark plug gap is more narrow than the stock(0.044inch=1.1mm) gap. what will happen if gap is too narrow? could that be the cause of my missfiring at higher RPM?

**o_man_ra23** · 04-02-2008, 04:44 PM

Depends how good your spark is. Often people shorten their gaps to fix a weak spark, which is the wrong way to do it, but it works. What coil are you using, and are you using the points setup??

**oldcorollas** · 04-02-2008, 04:59 PM

0.8mm should be starting point for spark plug gap. then increase until you get misfire?

**Joshstix** · 04-02-2008, 06:05 PM

In answer to the original question CT26A's have been used very sucessfully as upgrades on 3T-GTE's before.

I'd suggest that getting a decent tune would be the best place for you to start on sorting this thing out. Yes a good tune will involve not running a fixed timing advance, that is just crazy talk.

**CHB** · 04-02-2008, 06:14 PM

i'm using NGK BPR7ES and all of them are brand new. on the coil wise, i'm using standard toyota coil and it is electronic VR system, not point. right now i just tap the RPM signal from the negative side of the coil and fed it to MS2.

**chris davey** · 04-02-2008, 06:41 PM

You could use the best igniter possible but if your timing is at 20deg all the time it will not work well at all with a turbo engine.

**o_man_ra23** · 04-02-2008, 06:42 PM

take the whole signal to the MS and let the ECU take care of the spark control. You wont need an ignition module if you have the V3.0 megasquirt 2 board. The standard Toyota coil wont be much chop either... look at something with a bit more zap to keep away misfires, then you can go for larger spark gaps and give yourself a better burn. Also, iridium plugs would be another good upgrade.