fitting a 68mm throttle body

vocky

as above, not for the 65mm 2.4 tb 🙂

only for those mad enough to fit the 68mm 2.0 sc tb

southpaw

Re:

vocky said:

2198cc said:
Is extending the tb loom a straight forward job?
Any tips vocky?

here's my latest solution for the 68mm TB wiring 🙂

Does anyone know where I can get the plug and socket to attempt this?

vocky

with the vx220 sc conversion the tb plug doesn't need extending, just remove the pins two at a time from the plug and swap them around :thumbup:

SpaceWalker

What is the story if you combine the 2.0 LSJ TB and 2.4 LN4 Manifold?
I tried this and got issue with error code P1514. (Throttle Body Position - Not Present).
And only when i put more load on the engine.
Can this in some way might be sorted out?

vocky

you need to improve the flow through the engine, ported head, cams, 4-1 manifold and a 2.5" system to get the 68mm tb to work correctly

SpaceWalker

I have them:

Comp Cams Stage 1
2.4 Inlet Manifold
4 in 1 Piper Exhaust Manifold
Ported and polished head
2.5" full exhaust system
Pre cat and car removed
3" air tube from the TB to the air box
K&N filter
EGR removed
Balance shaft removed
NGK Platinum sparks

Am i ready for it 🙂

Blue_2_2

No, dont do it!
my engine lost 23bhp!
(and i lost the will to live)

Ive got the graphs to prove it

SpaceWalker

Ok, in that case is it the better option to do port and polish TB which NickB is offering, shall this be the better solution?
To be honest i've tested the 2.0LSJ and got lots of P1514 even after 100 miles steady drive with all of the mods listed:

-K&N panel filter with modified air box
-Veccy C Intake pipe / deristricted box
-NGK Iridium sparks
-New coil module
-Pre Cat and Cat removed and replaced with custom stainless steel exhaust system with 2.5" pipes - Extreme Tuning
-Cobalt LE4 2.4 Mainfold
-Comp Cams Stage 1
-1mm larger valves
-port and polished cylinder head
-balance shaft removed
-EGR cheater
-Piper exhaust manifold 4 in 1
-3" intake tube pipes
-Oil catch tank
-40mm thick water radiator
-Yacco VX1000 5W40 Full Synthetic Engine Oil

Please i do need an adivse for the TB, because i need to map the car ... finally drool.gif

Blue_2_2

The std throttle body was used on a 241bhp engine!

Fit a ported 58mm tb, then go and get it remapped

SpaceWalker

To be honest with the 2.0 SC TB i felt the car more responsive and with more power, but were not able to solve the P1514 error.
I drove it for 50-60km from 2000-4000rpm with no rush, but still after that error.
How should i drive it properly to adjust the ECU to the new TB?

I used it with the 2.4 Inlet Manifold, would this make any difference for the error than using the 2.2 Inlet Manifold??

Blue_2_2

Yeah, the 2.4 manifold & 68mm tb should be put in the same place...........

In the bin!

cicastol

SpaceWalker said:
To be honest with the 2.0 SC TB i felt the car more responsive and with more power, but were not able to solve the P1514 error.
I drove it for 50-60km from 2000-4000rpm with no rush, but still after that error.
How should i drive it properly to adjust the ECU to the new TB?

Same problem here,i'm running with 267° cams,dbilas intake ported to accept 68mm TB and full exhaust decat.
If i push the car hard no problem,mine car was used mainly on track and never had an error code,now i'm using it on street and ECU is putting out this code with engine stall that force me to switch the key on -off to revive the motor!! this happen only with light engine load.
Probably i will put back the 58mm TB to try if it fix the problem.

SpaceWalker

Same for me, not able to find a solution here - P1514 all the time. On higher load no problem, but on lower values .... every time.

chribo

Hey are there any news? I have the 2.0LSJ Trottle with my Superchager. I have the problem that it will run until 4200 r/min. If i put it higer the engine stall and i have to switch the key on/off. The code is also 1514.
Can anybody help me?

This appeard 300km after remap. Before there was everything fine!

Don_Hasi

What should be done with the brass pipe on the VX220? still blanking? If so, the chanel on the flange side should be sealed to, shouldn´t it?

vocky

I always connect it to the charcoal filter, cut off the original end (which connected to the z22se manifold) and extend the pipe between, if you cut the pipe at about 200mm from the fitting you have the perfect shape too, then use some 8mm rubber fuel hose).
Courtenay always block it off and vent the charcoal filter.

Don_Hasi

do you mean this pipe marked with the red arrow?

vocky

If the 68mm TB is used on a SC conversion then the brass pipe gets connected to the charcoal filter, if used with a 2.4 manifold then it needs blanking off (y)

Don_Hasi

I will use a different manifold like astrabertone.... I can manage with this a counterpart which could use the little hole on the backside of the LSJ tb. Do you think then, it will be possible to connect the tube shown in my picture with the brass pipe ?will there be enough vacuum ?

vocky

the original plastic connector fits perfectly onto the brass fitting on the 68mm TB (y)

the pipe is for the fuel tank vent valve, it only works at higher rpm and there will be plaenty of vacuum from the 68mm Tb - many SC conversions use it.

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