LexAnt

iTrader: (2)

I was wondering if changing the cams would require any ecu changes to timing?

The stock specs on a 1UZFE obd1 are:
224 intake 0.301" lift
229 exhaust 0.305" lift

if i go to cams specc'ed:
264 intake 0.330" lift
272 exhaust 0.335" lift

so would the timing get messed up? or would the ecu be able to compensate the timing on it's own without additional electronics?

thanks

*edit: also any idea on how emissions or idle would change?

LexAnt

iTrader: (2)

bump anyone?

soarer479

iTrader: (2)

you will be fine the car will run a little rough but stock ecu should work out alright

LexAnt

iTrader: (2)

okay so the stock ecu should be able to handle the timing adjustments. i plan on gettin a unichip as well to further help out the timing issues. is it possible to still pass emissions? i kno as is, the car runs extremely clean, so if i kept the cats, would tuning allow a clean burn, keeping it emissions legal?

soarer479

iTrader: (2)

unfortunatly i cant tell you anything about emissions i live in florida but i can tell you that unichip is crap and not worth it in any way shape or form. i would suggest some other form of tuning

LexAnt

iTrader: (2)

what would you recommend for tuning? the unichip was the only thing i found that was available for the SC4 with fuel and timing adjustments. that and the write up on planetsoarer seemed to be positive.

jgscott

iTrader: (1)

What's crap about the Unichip ?

LexAnt

iTrader: (2)

^ i'd like to know as well

SC400TT

iTrader: (4)

Based upon my research, The Unichip is no piece of crap...in fact, far from it. I works like an SAFC, only far, far better because it has such an extreme ability to tune AFR, timing, etc. It has something like 40,000 tuning points if I recollect properly...(it has been a long time since I looked at it). If you want to know alot more, jump on Planet Soarer and see what the Aussies are doing with it.

Ryan

LexAnt

iTrader: (2)

yea, i read up on the articles/reviews of the unichip installed on the v8 soarers with positive results which is why i wondered why i wanted to kno why someone would call them crap. anyways from what i gathered, the unichip is better than the safc in that there's over 50,000 (53, 248 to be exact) points. Their site also state that it can control:
- variable cam timing switch over points
- electronic boost control
- water injection
- override speed limiter
- drive additional injectors
- raise the rev limiter
and more....

sounds like something i would be able to use over for turbo as well.... sc400tt, any input on using the unichip for those turbo functions?

for now, all i need are afr and timing adjustments.

jgscott

iTrader: (1)

Actually, it can be tuned in 100 RPM increments also. Most of these guys don't know but, it can tune a Turbo car better than most ECU's out there and can controll everything for Turbo's. On our car's it one of the best ECU's out there.

SC400TT

iTrader: (4)

Correct...remember, it is a piggy back unit, not a replacement for the stock ECU.

Ryan

SC400TT

iTrader: (4)

LexAnt, why not contact the source? Should be your best bet in learning exactly how much this can do, and if it wil best suit your application. Here is the web addy for the US offices: http://www.unichip.us/...(Mods, I hope I have not broken the rules in supplying this address, if so, please remove)

Thanks,

Ryan

LexAnt

iTrader: (2)

yea, i've already found a custom unichip dealer in my area and talked it over with him. there's no plug n play harness so it has to be hard wired. i was already pretty set on the unichip seeing as the abilities i need for now with just afr and timing, my only concern was whether the cams specc'ed in my first post would pass emissions, would tuning on the unichip help lower emissions in the lower rpms?

fyi: cali emissions
tests are done at 15mph and 25mph.
rpm at 15mph = 1555 rpm at 25mph = 1602
CO2% = 14.6% at both 15/25mph
O2% = 0.0 at both 15/25mph
15mph
------------------------HC (PPM)-----------------CO%----------------NO (PPM)
max--------------------81-------------------------0.47-------------------685
average---------------21-------------------------0.06------------------150
measured------------7---------------------------0.01-------------------24

25mph
max--------------------47--------------------------0.44-------------------696
average---------------13-------------------------0.05-------------------136
measured------------3---------------------------0.01--------------------35

soarer479

iTrader: (2)

when you own a shop you tend to learn alot more about tuning devices as well as the company that makes them. they are crap because of all the faulty equipment ive dealt with and the company itself is worthless as far as anyone there being able to help any customer. why do you think turbonetics dropped them and stopped including them in all their newer turbokits, they didnt last long. i would suggest mega squirt, microtech, haltech or even hks f con v pro or greddy emanage ultimate. overall uni chip is PITA to tune compared to any others listed. i speak only from experiance. for those of you who dont plan on tuning yourself good luck finding a tuner who likes to or even will tune on unichip. ive tuned alot of tundras on the unichip and it really is worthless check the tundra forums and see for yourself how many ppl there like it.