Outer Limits 4x4 Board

hey im jus wonderin if any1 has put a gti head on a 1.6 block, or 1.6 in there gti conversion? was there much difference in power and was it worth it?

Search man. There are several around here and the topic has been well covered.
I've had a g16b in my last zook and now have a g16/gti in my current one, and I would steer anyone away from the hybrid if they would listen...

oh why is that? is it a shit thing, i have a gti motor in mine and i want a bit better power.

chester_390 wrote:oh why is that? is it a shit thing, i have a gti motor in mine and i want a bit better power.

then put a whole 16 valve 1.6 in. gti is a dinosour head.

the twin cam head has ha higher clearance volume in the combustion chamber than the SOHC 16v head, so when you bolt it to a 1600 16V bottom head it can be a little dowey from alow compression ratio

o ok, so if i change the whole motor and head to a 1.6 ill have to do the computer and wiring again wont i?

chester_390 wrote:o ok, so if i change the whole motor and head to a 1.6 ill have to do the computer and wiring again wont i?

You would have had to do this anyway.....

I have seen a few 1600 bottom ends with GTI heads parked on them whilst only running the GTI ECU, and they never last.

A Hybrid motor will almost always require an aftermarket engine managment solution.

Pete

not from self experiance i would expect it would be cheaper aswell to swap the whole motor over the a 1.6 16 valve rather then the gti head since alot of custom work would have to be done to get worth while performance and reliability

I know rod (one stop suzi shop) had one in his ute

ofr57 wrote:not from self experiance i would expect it would be cheaper aswell to swap the whole motor over the a 1.6 16 valve rather then the gti head since alot of custom work would have to be done to get worth while performance and reliability

I know rod (one stop suzi shop) had one in his ute

And in his old red shorty too (balistic). I know the new owner, and it runs the 1600/ GTI hybrid on standard GTI ecu and its melted once already. The owner can't understand why it is happening despite some intense coaching on EFI systems and why you can't just turn a screw on the carby to " richen it up"

You blokes have pretty much summed it up.
My hybrid started off with the stock ECU. It ran, but the AFR's leaned out over 3500rpm and were bad enough over 5000rpm that you could hear and feel the engine trying to suicide.

Tried the bodge fix, FPR with higher rail pressure to no avail.
Then went whole hog with aftermarket ecu, big fuel pump, higher flowing injectors, 60mm tb, bored inlet manifold etc. Even an sc14 briefly as an experiment.

Yes the engine makes more power than a g16b... At a completely useless offroad rpm and with the same amount of lowdown power as a pink shirt wearing Hmm...
In the rev range a typical sierra with reduction gears gets used offroad (2000-5000rpm) the power is pissweak.
130hp atw is useless when it occurs at 8300rpm...

It's no use having an engine that makes great power at 8000rpm if it's a gutless pig at 3500 where you spend all your time. Driving around on the beach with the engine screaming at 6000rpm in 1h is not my idea of a practical 4wd. It's these same reasons people usually dislike the standard g13b conversion.


G16b nuff said. You're trying to go places in a 4wd, not boost around like a dickhead.

yea ok that makes sense, anyone no where i can buy a vitara halfcut?

But what if you like the sound of a g13 screaming 8000rpm

mrRocky wrote:But what if you like the sound of a g13 screaming 8000rpm

then buy a GTi

Gutless wrote:

chester_390 wrote:o ok, so if i change the whole motor and head to a 1.6 ill have to do the computer and wiring again wont i?

You would have had to do this anyway.....

I have seen a few 1600 bottom ends with GTI heads parked on them whilst only running the GTI ECU, and they never last.

A Hybrid motor will almost always require an aftermarket engine managment solution.

Pete

Big X2 on that one

ofr57 wrote:not from self experiance i would expect it would be cheaper aswell to swap the whole motor over the a 1.6 16 valve rather then the gti head since alot of custom work would have to be done to get worth while performance and reliability

I know rod (one stop suzi shop) had one in his ute

Yeah and ask rod how much money he's sunk into that engine

if i buy a auto half cut wat computer do i need to run it with my sierra gearbox?

chester_390 wrote:if i buy a auto half cut wat computer do i need to run it with my sierra gearbox?

The computer it comes with.

u chop out and discard the auto box ecu.

o ok sweet as cheers for that info!!

what sort of driving do you plan on doing.

as i have just found that autos are #1 for the slow tech driving

jus bit of bush and mud, and i want it to be good on the road to

oozuk wrote:the twin cam head has ha higher clearance volume in the combustion chamber than the SOHC 16v head, so when you bolt it to a 1600 16V bottom head it can be a little dowey from alow compression ratio

If I used a 1600 block with a gti head, would it be suitable for runnning boost?

It would be no more suitable than a standard G16b.
Running the GTI head will help by lowering the static compression, but the conrods will always be a weak link that usually prove not to be up to the task.

Plenty of people have had success running forced induction on the g series bottom end, but it has also resulted in plenty of failures.

mnemonix wrote:It would be no more suitable than a standard G16b.
Running the GTI head will help by lowering the static compression, but the conrods will always be a weak link that usually prove not to be up to the task.

Plenty of people have had success running forced induction on the g series bottom end, but it has also resulted in plenty of failures.

Fair enough, I won't bother with that then. 100hp should be enough to keep me entertained anyway

peter johns fucked up because the fuel was a year old n thay advanced the shit out of the timing which caused it 2 ping like fuck n in the end he broke the ring gland not from leaning out. they run good they rev 2 about 7 grand on standerd computer n have mor torque then the 1.3 bottom end. i drove mine from crestmead to rocklea n back which is about 60 k,s every day at 7 grand every gear with standard computern used a tank a week (5 days) for 6 months n still runs good just stopped cause working at dalby now n had 1 with a microtec on it n it ran no wear as good

Hey matt,

John started it again the other day and I have seen less white smoke come from a zook being revved to the redline whilst parked on its roof!

His motor is fucked again and its not from the fuel this time.

You may have had a better motor than his but sooner or later it will go bang. OEM ECU designers spend countless millions of dollars tuning the engines for every individual change and variance. If it were as simple as just smashing on an ECU from the donor head, then why go to all the effort of tuning the ecu to suit OEM engine package??

I still believe there are far better conversions for a sierra than this one.

A 20v 4AGE would give similar power, torque and power range with factory reliability.

JMO
Pete