gt4_vinnie

All fine mate, we're all here to learn =), I don't mind ya jumping on my thread. I'm pretty sure, though could be wrong, its mainly just the recharge time of the coil thats the difference, COP has fewer recharges as each plug is controlled from a seperate coil, where as a wasted spark is constantly charging the coils for 2 to 4 plugs. I'm not 100% sure if theres any performance gain in either, because both of them will be doing the same job, both will be clean sparks and right timing due to ECU programming, but I'm pretty sure its mainly preference for whether you want 4 leads running around your engine, or just want Coils sitting ontop of each plug. Was thinking about hotted up cams, and adjustable cam gears, but looks like I'm pretty limited for choice over here with what options. Also would like to know the best lift angle etc and what the factory cam specs are, so I can get an application that suits. I want a high revving engine, so gonna be lightend flywheel, electric fan, removed A/C and P/S and possible forged lightweight pistons eventually, so cams and cam gears were probably a must. Cheers Vinnie

So probably forged pistons with about 8.5 - 9 :1 compression, as just looked at a crowd over here which does two sets, 11.5:1 CR for N/A applications, or 8.5:1 CR for turbo/supercharged. Both a similar price, just running it N/A the higher compression ones would be ideal, but then would need to change em for the super charger, if I was to do it. Probably not, the whole idea came from me and my Brother building two good cars for the legal street racing over here, down a mountain pass. He was gonna do an mx5 1600, and me the ae86 1600, and we were gonna try keep em even. So how hard is it to filter the ram tubes, cause too fine would be restictive, and too course would be useless. Is there a crowd that make filters for the silvertop rams? So COP and Coilpack, the difference between em, is there a noticeable benefit of one or really just personal preference. Also what other upgrades, apart from a turbo or supercharger, would be good to do, wanna try build the 4age, to close to 200HP, don't really wanna go over that, as more or less want an underpowered lightweight machine, but a little power is nice haha. Cheers for the help, made me solidify or remove those internet speculations from my theory of work. Thanks Vinnie

Ahh well that would explain the 'bits and pieces of info' lol. Doesn't TRD also make spacer plates for the head, to lower compression, basically a thick gasket, or was that for the red tops only? And I may just go N/A for now, can always add. So running an aftermarket ECU, little new to the programable ECU, still running stock on my Celica, but may change that too. With running that, what would be the best way to go for intake and ignition, would I still need the cam angle sensor from the dizzy, and then run coil over plugs or would the wasted spark system be better, Just not too sure on whats easiest accessible over here in NZ. And what would be the best for the intake, quad throttle bodies, with map sensor and Ram tubes? say 40mm? All of my guesses are just that, i've not had the luxuary of having that much to do in terms of power upgrades on the 4age, Ive spent the last year building the 3sgte, and bypassed alli its restrictions on stock ECU lol, looking back, setting up though would of been so much easier with removing the need for the AFM, and then running everything through proper programable software. Cheers for that, any tips on the best way to do this would be helpful, wanna have it reliable, powerfull, but also cost effective, as only on a low wage, so not to much can be spent at once. Cheers Vinnie

Cheers for the quick reply. So theres no way to modify the signal wire of the hall effect sensor, to run it into two coil packs, for a wasted spark setup? As I thought that I read somewhere that you just ned to split the signal and it will run it, but could be wrong. I was thinking the SC 12 or 14, and if I was to Supercharge it, was probably gonna go w55, still deciding on that though, may just leave N/A. And if I was gonna do that, probably gonna do new pistons 4AGZE ones, was gonna go a full rebuilt/upgrade, but good to know the old rods and crankshaft are worthy as is. As for the intake, would running a blacktop ecu have any ill effects with running a silvertop engine? and if not, would the best way to run that be just the quad TB's or Ram tubes and a MAP sensor? Also is the blacktop ecu able to run Coil over plug or wasted spark without much modification, or would Aftermarket still be the way to go? Thanks Vinnie

Hey guys, new to the forum, but certainly not to Toyota's. Unfortunately, I don't have an AE86 yet, but planning on getting one soon, after I finish my ST165 gt4 Celica, but got offered an engine, and now have some ideas in which I would love some help in deciding what and how to do. Right, so i recently just picked up a 4A-GE 20v Silvertop engine and box out of an AE101 Levin, for a steal. 170,000kms on the clock, complete engine, afm, ecu, cut loom, 5 speed manual gearbox and a few other accessories. My plan is to flick all the sh*t I don't need off, including the box, P/S pump and A/C system, and build the 20v to RWD. So far I know some of what I need to do, RWD Spigot bearing, clutch, flywheel, T50, RWD Alternator bracket, engine mounts etc. Gonna get one of the water kits from SQ engineering, to sort that out. All I really need now is to figure out how to run the air intake, and work my coils / ignition out. Whats the best suggestions for the intake, while running factory ecu, as not looking at aftermarket ECU yet, so I know I'll have to use the AFM. Using a set of duel wasted spark coils from a 4A-GZE setup, how hard would it be, to remove dizzy cap, cover CAS, and run the CAS into the duel coil packs instead of one? Or is there an easier, more cost effective way to do this. So that's the conversion of the engine pretty well sorted, until I find a vehicle and have to mate it all up, but I'll get to that when I can. My next question is regarding fitting a supercharger to the RWD 20 4A-GE. Will the internals of the 20v handle the capabilities of a supercharger, just gonna be for street application, so not sever boost, just a little more go when I need it. Also what would be the best way to mount/use the supercharger, and what would be involved with fitting one up. I'm thinking the SC-12 or SC-14, but you guys can offer me a better idea if you got one, I'm open to feedback. I don't really wanna run a turbo, as my 3S-GTE is gonna be the turbo'ed powerhouse, so definitely wanting to keep the 4A-GE N/A or Supercharged. What would you guys have in mind, and are there any other complications I'm going to run into along the way? Thanks in advanced. Vinnie