Josh's Rev 3 Turbo

[JAAASH]

Can we have a start up video by any chance ?

I'm sure that something can be arranged

[JAAASH]

Great to see the pics dude, im looking forward to seeing the parts being painted when they are finished as ive still no idea what to do with mines

When is it going to be finished?

I'll post better pics after I've done a bit of cleaning up. Think I'm gonna stick with the matte black stealthy look for now. Maybe get black hoses too.

It was finished today I took the train up to Pete's this morning. 4 hours on a train! Not fun

[JAAASH]

Picking the car up on Saturday Can't wait!

So was it worth the wait Josh ?

Hell yes! I've just got home. It feels so strong and the spool up on the turbo is wicked.

I wasn't able to take it past 13psi or do any hard launches though as it would appear that I have some sort of ignition problem. Pete thinks it's the coil so I'll swap that out for a new one during the week and see if it sorts it.

Thanks again

[JAAASH]

Decided that the rev2 block was a good choice as it has thicker walls than a Rev3 so eliminates the risk of cracking.


Really?

Yep. Im sure if you do a couple of searches or ask any of the specialists/gurus they will confirm it for you

[Martin F]

Picking the car up on Saturday Can't wait!

So was it worth the wait Josh ?

Hell yes! I've just got home. It feels so strong and the spool up on the turbo is wicked.

I wasn't able to take it past 13psi or do any hard launches though as it would appear that I have some sort of ignition problem. Pete thinks it's the coil so I'll swap that out for a new one during the week and see if it sorts it.

Thanks again

I had a similar problem a few years ago, when getting mapped i started getting problems at 1.3 bar, turned out to be the ignition leads, hope you get a quick fix and glad you like what you have so far

[JAAASH]

So was it worth the wait Josh ?

Hell yes! I've just got home. It feels so strong and the spool up on the turbo is wicked.

I wasn't able to take it past 13psi or do any hard launches though as it would appear that I have some sort of ignition problem. Pete thinks it's the coil so I'll swap that out for a new one during the week and see if it sorts it.

Thanks again

I had a similar problem a few years ago, when getting mapped i started getting problems at 1.3 bar, turned out to be the ignition leads, hope you get a quick fix and glad you like what you have so far

Leads and plugs are reasonably new so it shouldn't be them. I'll report back when I know the issue.

[MR2 Rich]

Decided that the rev2 block was a good choice as it has thicker walls than a Rev3 so eliminates the risk of cracking.


Really?

Yep. Im sure if you do a couple of searches or ask any of the specialists/gurus they will confirm it for you

If you do a search I think you will find that there are cases of blocks cracking on each Rev. It is luck of the draw mate.

[JAAASH]

Decided that the rev2 block was a good choice as it has thicker walls than a Rev3 so eliminates the risk of cracking.


Really?

Yep. Im sure if you do a couple of searches or ask any of the specialists/gurus they will confirm it for you

If you do a search I think you will find that there are cases of blocks cracking on each Rev. It is luck of the draw mate.

That there may be. But the rev 3+ walls are thinner, therefore making the risk higher, mate.

[MR2 Rich]

Yep. Im sure if you do a couple of searches or ask any of the specialists/gurus they will confirm it for you

If you do a search I think you will find that there are cases of blocks cracking on each Rev. It is luck of the draw mate.

That there may be. But the rev 3+ walls are thinner, therefore making the risk higher, mate.

There were casting issues with the Rev 3's but not all, just luck of the draw. Only way to tell is getting a Rev3 block ultra sounded.

Glad the build is going well mate.

[ashley]

Rev 3/4/5 have had issues with inconsistent cylinder wall thickness (although there are supposed to be some "later" rev5 blocks that have thicker cylinder walls apparently). You tend to see cracks in the cylinder walls, or they go on the deck between the cylinders where the water jacket is pretty close to the surface.

Rev 1 & 2 blocks tend to let go around the water pump when they go, though this may be due to people not replacing one of the bolts that holds the a/c compressor when they remove the a/c.

No guarantees no matter which block you chose from what I can work out...although not heard of many 5S blocks letting go...

[JAAASH]

Learn something new everyday! I have only read/been told that rev2's are thicker.



Ok, so back to the misfiring. It's still there. Need to feather the throttle so as not to go above 13-14psi. Idles perfectly and drives perfectly until I hit full throttle and try to build boost over the above values

I swapped the coil and igniter today, as well as a brand new rotor arm.
Dizzy cap, plugs and leads are all reasonably new. No more than 2k miles.
Plugs are NGK Iridium grade 7 and leads are oem Toyota.

Any ideas? What else can I check?

Could it be injectors?

Any advice appreciated.

[MR2 Rich]

Injectors are very reliable on these engines mate, so although it is a possibility it is unlikely.

Have you got a boost controller?

Have you checked for fault codes?

[JAAASH]

Boost controller is set to off at the moment until the misfire is sorted.

Yep, no codes.

[Ryan S]

Boost controller is set to off at the moment until the misfire is sorted.

Yep, no codes.

you measured the fuel pressure?? (sorry, not read the whole thread)

[C35Rob]

Leads and plugs are reasonably new so it shouldn't be them. I'll report back when I know the issue.

shouldn't be.. but it'd make sense to eliminate the possibility of it being them..

minor teething problems anyway, looking forward to more pics, and maybe even a few dyno graphs.

[JAAASH]

Boost controller is set to off at the moment until the misfire is sorted.

Yep, no codes.

you measured the fuel pressure?? (sorry, not read the whole thread)

No, assuming I'd need a wideband for that? I'm running standard ecu so no data logging that I can do.

[JAAASH]

Leads and plugs are reasonably new so it shouldn't be them. I'll report back when I know the issue.

shouldn't be.. but it'd make sense to eliminate the possibility of it being them..

minor teething problems anyway, looking forward to more pics, and maybe even a few dyno graphs.

I've checked the plugs, they are all fine.
How would I check the leads?

Pics are probably gonna be the weekend before Japfest now after it's had a good ol' detailing session.
And i'm planning on doing some power runs at Japfest so I'll post the results after that, providing that I've sorted the misfire.

[C35Rob]

you can check the leads resistance with a multimeter, but really.. its probably worth swapping them (borrow a known good set?)

the ignition system is far from complicated, it can only be a few things

what are the plugs gapped to? if it's only missing under boost it may be the gap is too big.. I don't like iridium plugs to be honest

wideband measures air/fuel ratio not fuel pressure.. but I guarantee the misfire will be plugs/leads/dizzy/rotor arm or coil

[JAAASH]

Ok, I'll check the leads in a bit. I do have an older set of splitfire leads that i know work so I'll try them as well. I swapped back to standard toyota ones as the splitfires let water down into the plug wells every time it rained.

Plugs are pregapped so i havent messed with them. I've read that you shouldn't try to gap iridium plugs as the tips are brittle.

[JAAASH]

Would a boost leak cause a misfire like this?

Or a dodgy dump valve?