Golden95SC

iTrader: (21)

How's it going guys. Going to build my sc300 very soon but I cannot decide which route to go. Na-t or gte swap

1jz swap would be the easiest thing to do as it's a drop in and I have done it before with my pasts cars, but there's something about it I never liked.

Na-t is my other option and I would go standalone w/ custom turbo kit. il have to do something with the trans as well as I plan to keep the car auto. But this is also a cheaper option to a swap and less work.

2jzgte vvti swap is the other thing on my mind as it's a great platform and I would prefer over the 1j.

Now here's my main question. What kind of limits can the 2jzgte vvti ecu reach w/ a piggyback?

il have to do more research , but have people ran stock ECU's with injectors running e85 with a piggyback?

gerrb

iTrader: (34)

I wouldn't recommend a stock ECU and a piggyback with E85 just because you are dealing with a different AFR . Your stock ECU with the narrow band is programmed for the 14.7 base AFRs and E85 has 9.7 base AFRs. When you start using E85 , you need good control of fuel and timing to take advantage of it !

TXMAG

iTrader: (1)

Just curious what you're using for a transmission.

Golden95SC

iTrader: (21)

Il be using the stock aristo auto trans.
​​​and eventually Il have the valve body modified and trans shimmed. As well as a large transcooler.

​​​​​​

Ali SC3

iTrader: (10)

Actually since o2 sensors work off of lambda, you do not have to change anything 02 sensor wise (narrow or wideband) when running E85.
You will of course need to add in alot more fuel as in larger injectors, lines, pumps, etc... the normal stuff for E85

Its one of those common misconception things. The o2 sensor just sees stoich or 1 lambda...
The wideband gauge (or software) converts that to 14.7 with gas and 9.7 with E85, but in reality the o2 sensor is outputting the same thing when its stoich despite the fuel being used.
If you were to change to lambda values, you would see that it will read the same with either fuel when both fuels are tuned for stoich.

There is a guy on the map ecu forum running 1000cc injectors and E85 on a 2jzgte ecu, says it runs well too but I dunno how well without having tried it.
You wont get the advantage of running extra timing, but the ecu will not have to pull any so it will run at full timing.. and you can bump up base timing some via dizzy if you are na-t.
You would be able to benefit from the higher octane and not having any timing pulled which might make it worth it, even without a full tune on a standalone. Still I would go standalone juts to make the extra power safely.

I want to say the evo/subaru crowd does the same basic thing also.

Golden95SC

iTrader: (21)

Thanks for info, at this point I'm now leaning towards a 1jz. An aristo swap seems like to much work for me at the moment. I rather just throw in the 1jz with a good piggyback as it's a straightforward swap and have already done it.

My realistic goal was a 11 sec daily. I think a Borg Warner on the 1jz can accomplish that w/ supporting mods and won't be difficult at all to put together at all.

And I guess I could always go 1.5 in the future.

gerrb

iTrader: (34)

^^^ there should not be a lot of difference in doing a 2JZGTE swap and 1JZGTE swap if we are talking about the amount of work . Price wise yes ... 2JZGTE swap is pricier.

Ali - true that the o2 sensor works off the lambda but the 2JZ ecu was mapped or programmed based on 93 octane (that is why we see those little Premium Only sticker on the gas lid). Wouldn't it have a big effect on the performance (map) when you start using fuel with 105 octane (e85) for which it wasn't mapped for ? I doubt an ordinary piggyback will be of good use not unless your piggyback have full controll of fuel and timing ? Many when they say piggyback , they use those that just fools the MAF or MAP like AFC Neo or SAFC.