18RG rebuilds and power outputs?

[o_man_ra23]

And remember that 18RG dissies have centrifugal advance as well as vacuum advance... so theres some more places for things to quiver.

Cheers, Owen

[Damo82]

Rebuilt, bored, stockish compression, balanced, minor port and polish on an 88230 head, 40mm solexes, electronic ignition, extractors, leaking oil and coolant badly I got 83.7rwkw

The engine had only done about 1500km's when she was put on the dyno for tuning.

[Norbie]

Maybe try points in the meantime Norbs, they are a PITA, but they work, and are simple.

I'm using the hall effect sensor as a trigger for the Haltech (mechanical and vacuum advance disabled), so points aren't going to help me there. The old reluctor setup worked just fine in the original config, ie directly triggering the coil, but when it's used as a CAS it doesn't play nice with the Haltech circuitry. Apparently this is a known issue with the E6X so it's not just me.

[o_man_ra23]

Uhuh, so what you are saying is that points will work?? Directly fire the coil again, till you sort out the CAS.

Cheers, Owen

[Norbie]

Uhuh, so what you are saying is that points will work?? Directly fire the coil again, till you sort out the CAS.

I'd probably do something like this (actually I'd return to the old reluctor setup) if I needed to drive the Celica. Luckily I have a Century to pimp around in while I sort out the CAS setup.

[The Witzl]

Norbie,

i'm dropping into SAS tomorrow arvo to look at getting the crank trigger done on mine. Once i have an idea on price im pretty sure i can get multiple done at once (i have at least 2 spare crank pulleys).

It'll just be a custom bracket bolted to the timing cover, with a VR sensor positioned over precise notches cut out of one of the grooves on the crank pulley.

[Mr DOHC]

107rwhp. 8.7:1 unbalanced ported head 282/282 cams, 16.5 1/4 mile

got the bottom end done, it went way quicker but never ran it

[Norbie]

It'll just be a custom bracket bolted to the timing cover, with a VR sensor positioned over precise notches cut out of one of the grooves on the crank pulley.

Let me know how it works out, if it's compatible with the Haltech I'd certainly be interested in a similar setup! According to the E6X manual I'm limited to a 60-2 or 36-1 tooth wheel.

[Gunna]

Rebuilt, bored, stockish compression, balanced, minor port and polish on an 88230 head, 40mm solexes, electronic ignition, extractors, leaking oil and coolant badly I got 83.7rwkw

The engine had only done about 1500km's when she was put on the dyno for tuning.

Gee thats pretty good. Your getting about the same as these guy that are running efi and your still using the 40mm solexes. How bored out is it? 2.2?

[o_man_ra23]

Gunna, the twin solexes actually made more power than the EFI, due to the shorter runners and more throttle cross sectional area. They just werent as smooth or efficient.

Cheers, Owen

[Gunna]

Oh ok cool i just assumed the efi would have put out more power. Thanks for that... I saw before in the thread that your old engine that norbie has you got the head shaved on. Do you recommend doing it? Iv heard that not much can be taken off...

[chris_rg]

Seconded.
My Megasquirt-II is giving me similar griefs, unsure of the full reason yet, but the above solution is the best option.

[snip]

FWIW, I run a VR sensor with no problem at all on my MSI-extra. VR is converted from 21R dizzy. all advance mechanisms locked solid. The timing light shows small variations in ignition timing, but it would be less than 1 degree.

I use the circuit with the LM1815 conditioner.

This setup will rev with no misses as high as I am game to go (7300ish)

Cheers
Chris

[o_man_ra23]

Gunna... There are advantages and disadvantages to heavily shaving the head. You need to take it into account when setting up your timing chain tensioner. 40 thou is about a mil, and I had no problems with having enough meat, and noticed the increased compression. Im looking at shaving a whole lot more off an 18RC head soon (something to do really, see what kind of torque I can get), so yeah, I would do it again... and have seen a 4K powered corolla shaved down to the markers running methanol (kept blowing head gaskets from too much compression) and it was quite quick.

Cheers, Owen

[The Witzl]

Chris,
from what i've been reading, it's potentially a problem with noise from the injector flyback circuit... im running low impedance injectors at 1ms openning time with 18% current limit. We will see though once i have the VR signal directed into the v3.0 pcb and the VB921 ignition coil driver installed.

Norbie,
it would be 2-pulse per crank RPM for me (4-pulse per cam rev)t o suit the current MS-II setup i have. Sounds like the Haltech isnt too flexible in that department

[Gunna]

Ok thanks mate...

Is there anything else you RG guys would recommend doing to my motor before i put it together? Im going to be using it on the street and hopefully take it out on the track for a bit of fun eventually so i dont want it to be a pig to drive in town but i want to get the most out of this engine with out going turbo or efi...

So far iv got brand new pistons ( 9.5 comp i think.. Did toyota make 9.5 comp pistons for the RG? ), im getting the bottom end balanced, extractors, 45mm webers, 88250 head at the moment but i think the valves are stuffed , electric ignition, re-grind cams... I think thats all at the moment

Any thoughts would be great guys. Thanks...