Rev 4 caldina swap q?

[tiff_lee]

Just heard back, 10:1 afr on a gen 4 is perfect

Heard back from who?

Do you monitor the AFR yourself while driving (have you got a wideband fitted)? The AEM Uego doesn't read any lower/richer then 10:1!

[Odin_S]

I think u are misunderstanding what I mean full boost is around 4200rpm to 6500rpm but the turbo start building up or spooling up around 2700rpm that's what the dyno chart shows... I know its impossible for a big turbo to run full boost from 2700 to 6500rpm.

Ah i see, mine is building from say 3500rpm. But wants to go on passed the 7200rpm limit

7200rpm it must be a beast... mid to top end power 500bhp? Hehe.

Hows your idle rough

It's always hard to get a good balance for a street car but good on track.

My idle is basically OEM, it took a long time and different mappers to get there.

[sinjen]

Just heard back, 10:1 afr on a gen 4 is perfect

Heard back from who?

Do you monitor the AFR yourself while driving (have you got a wideband fitted)? The AEM Uego doesn't read any lower/richer then 10:1!

Justin from Prime in the U.S. They're the guys who have done hundreds of gen 4 conversions over there, so they know their stuff. I run a wideband. Not sure about it being too rich, as I believe JimGTS runs into the 10's at wot on his gen 3 and he's running a stock ecu on what is widely regarded as a well setup car.
My understanding is that mid 11's to 12's at wot is only used on engines that have been precisely mapped for power, not necessarily for longevity.

UEGO reads 8.0:1 up to 20:1

Think I'll do a proper boost leak test though

[tiff_lee]

Just heard back, 10:1 afr on a gen 4 is perfect

Heard back from who?

Do you monitor the AFR yourself while driving (have you got a wideband fitted)? The AEM Uego doesn't read any lower/richer then 10:1!

Justin from Prime in the U.S. They're the guys who have done hundreds of gen 4 conversions over there, so they know their stuff. I run a wideband. Not sure about it being too rich, as I believe JimGTS runs into the 10's at wot on his gen 3 and he's running a stock ecu on what is widely regarded as a well setup car.
My understanding is that mid 11's to 12's at wot is only used on engines that have been precisely mapped for power, not necessarily for longevity.

UEGO reads 8.0:1 up to 20:1

Think I'll do a proper boost leak test though

Ah I was referring to the regular Uego not the x-series one.

Now you say Prime in the U.S that's got me thinking as i'm sure i've read about something similar before. Are they recommending 10:1 because the fuel in the US is actually lower octane than in the UK? I've not got time to find any decent links right now but if you look at a like for like comparison the equivalent to 95 unleaded is 90/91 in the US. (Edit: I realise no one is running a turbo on 95 or I at least hope not, that was just for comparisons sake).

http://www.mocgb.net/forums/showthread. ... ne-grading

http://rennlist.com/forums/993-forum/27 ... ained.html

[sinjen]

Heard back from who?

Do you monitor the AFR yourself while driving (have you got a wideband fitted)? The AEM Uego doesn't read any lower/richer then 10:1!

Justin from Prime in the U.S. They're the guys who have done hundreds of gen 4 conversions over there, so they know their stuff. I run a wideband. Not sure about it being too rich, as I believe JimGTS runs into the 10's at wot on his gen 3 and he's running a stock ecu on what is widely regarded as a well setup car.
My understanding is that mid 11's to 12's at wot is only used on engines that have been precisely mapped for power, not necessarily for longevity.

UEGO reads 8.0:1 up to 20:1

Think I'll do a proper boost leak test though

Ah I was referring to the regular Uego not the x-series one.

Now you say Prime in the U.S that's got me thinking as i'm sure i've read about something similar before. Are they recommending 10:1 because the fuel in the US is actually lower octane than in the UK? I've not got time to find any decent links right now but if you look at a like for like comparison the equivalent to 95 unleaded is 90/91 in the US. (Edit: I realise no one is running a turbo on 95 or I at least hope not, that was just for comparisons sake).

http://www.mocgb.net/forums/showthread. ... ne-grading

http://rennlist.com/forums/993-forum/27 ... ained.html

No he's saying that on a Gen 4 you should see 10:1 at WOT at full boost, no mention on fuel used. I use 99ron everytime. The ecu hasn't been "cracked" either so the ecu maps are all the same.

[tiff_lee]

Justin from Prime in the U.S. They're the guys who have done hundreds of gen 4 conversions over there, so they know their stuff. I run a wideband. Not sure about it being too rich, as I believe JimGTS runs into the 10's at wot on his gen 3 and he's running a stock ecu on what is widely regarded as a well setup car.
My understanding is that mid 11's to 12's at wot is only used on engines that have been precisely mapped for power, not necessarily for longevity.

UEGO reads 8.0:1 up to 20:1

Think I'll do a proper boost leak test though

Ah I was referring to the regular Uego not the x-series one.

Now you say Prime in the U.S that's got me thinking as i'm sure i've read about something similar before. Are they recommending 10:1 because the fuel in the US is actually lower octane than in the UK? I've not got time to find any decent links right now but if you look at a like for like comparison the equivalent to 95 unleaded is 90/91 in the US. (Edit: I realise no one is running a turbo on 95 or I at least hope not, that was just for comparisons sake).

http://www.mocgb.net/forums/showthread. ... ne-grading

http://rennlist.com/forums/993-forum/27 ... ained.html

No he's saying that on a Gen 4 you should see 10:1 at WOT at full boost, no mention on fuel used. I use 99ron everytime. The ecu hasn't been "cracked" either so the ecu maps are all the same.

Yeah I know he is saying that? the point was are they taking into account that US fuel is lower octane then UK fuel nothing to do with ecu maps. Meh i'm not paying to fill it up.

[sinjen]

Well I imagine they're aware of the fuel used in Japan and the fuel these engines are mapped for, why would they run around on the equivalent of our 95, as you said earlier (or for the purpose of helping your reading comprehension, "as you say"!)?! I run 99 (just like as you say most turbo owners) so why wouldn't they. Of all the hundreds of conversions they've done they are seeing the same AFR's as me, and I imagine they have all the Toyota literature perhaps too.

[tiff_lee]

I never said they run around on 95, in fact I explicitly stated that was an example. You clearly lack reading comprehension and don't want to entertain anything other than what Prime has told you so i'm out.

[sinjen]

I never said they run around on 95, in fact I explicitly stated that was an example. You clearly lack reading comprehension and don't want to entertain anything other than what Prime has told you so i'm out.

Glad you finally took the hint

[MR2Kyle]

I have another question... Since I bought the engine from an auto car...and I'm using the auto ecu how would I go about getting rid of the limiter that stops the engine from going over around 6200rpm? Other than that all is pretty much done an I should be back in the car on Saturday so a big shout out goes to luke at pacific works for all the messing about he has had to endure with this conversion!! I'd say he's sick of the car now!

[Driftlimits Performance]

Indeed all done! What a lovely car! A cosmos rev5 with a st215.

Big thanks to Paul Woods for making the wiring loom whilst I was on holiday! Of course it started on the first attempt.

We do though have a Rev limit at 6k rpm. It limits spark then trys to cut fuel. Unfortunately due to time constraints/ flights etc we didn't get to the bottom of it. I don't think it's related to the auto gearbox ecu. We thought it was related to the 2 speeds on the fuel pump control as they do switch but I think it's too high in the rev range. I'd like to try coil packs but then we're getting into process of elimination and spending money.

When it hits the limit we do get a code for fuel pump circuit or ecu. However I believe this to be consequence not cause of the issue.

[pbmr2]

how are you reading the rpm? the stock rev counter doesn't work without a resistor being added.

[sinjen]

Indeed all done! What a lovely car! A cosmos rev5 with a st215.

Big thanks to Paul Woods for making the wiring loom whilst I was on holiday! Of course it started on the first attempt.

We do though have a Rev limit at 6k rpm. It limits spark then trys to cut fuel. Unfortunately due to time constraints/ flights etc we didn't get to the bottom of it. I don't think it's related to the auto gearbox ecu. We thought it was related to the 2 speeds on the fuel pump control as they do switch but I think it's too high in the rev range. I'd like to try coil packs but then we're getting into process of elimination and spending money.

When it hits the limit we do get a code for fuel pump circuit or ecu. However I believe this to be consequence not cause of the issue.

Ecu shouldn't be the problem if it's all wired up correctly, could be a dodgy ground somewhere.
How are you reading the codes, have you wired in the Obd2 readout? Would tell you a lot more if you have. Does it restrict the revs at different boost levels ie wastegate only? AFR's? Presumably you upgraded the fuel pump (sorry if that sounds too obvious)?
I doubt it's the coils as they're pretty sturdy even as they start to break down.

[Driftlimits Performance]

See I'd heard they're not the best coil packs. Yes we have an obd and yes turbo fuel pump. Tach modded for ecu signal.

[sinjen]

Double post