thanks for response.
already have stage 2 shift kit with corvette servo
yes i installed the restirctor. (that was such a bitch to get in without dropping it haha)
what would this memcal do? like how does it change the computer?
how do the insulaters help out? cos they were on the cards for next couple of mods.(which one would you recomend)
is what greenfoam and delco... said correct MACE? i thought that only the vs had problems with the computer.
“thanks for response.
already have stage 2 shift kit with corvette servo
yes i installed the restirctor. (that was such a bitch to get in without dropping it haha)”
Has the general line pressure been increased though? They can easily do this by adjusting the force motors in the valve body when the oil pan is off. In saying this though I much prefer this mod
4L60e Single Stage Shift Kit - $70.00 : Shiftkits Australia, Performance Shift Kits and Vehicle Electronics as you have the option of being able to switch it off or on.
“what would this memcal do? like how does it change the computer?”
Would change the line pressure and shift points
“how do the insulaters help out? cos they were on the cards for next couple of mods.(which one would you recomend)”
The plenum spacer does dull the response of the throttle body (as it requires more time to fill up the plenum) similar to what the factory humps in the throttle body do, dull the response throttle body. In saying this though it still does improve overall performance
“is what greenfoam and delco... said correct MACE?
What they are saying is accurate but, I’ve gone into that into greater detailed in the quoted text a few posts back (which can be found here
https://forums.justcommodores.com.au/threads/v6-peformance-parts.96810/)
Ok just to clear a few things up with larger throttle bodies.
Installing a larger throttle body on a VN-VR will not change the shifting characteristics on an auto.
This is because the characteristics of the standard vs aftermarket throttle bodies are the same compared. What I mean that per given throttle angle each one will give the same air flow characteristics, and will be in close proportion to each other. Yes the larger throttle body will definitely be able to flow more air overall then the factory item, however because the characteristics are similar the computer doesn’t have a problem.
However on the ecotec throttle bodies this isn’t the case as this characteristic is different when you compare the standard throttle body to an aftermarket one. The is because the factory item has “humps” inside to archive a desired throttle characteristic (dulling throttle response). Where as the after market item machine these humps right out which are a restriction, however this results in new flow characteristic that are not in proportion with each other especially under light load where the difference is greatest. As a result the computer may get caught out at times because of it depending on your driving style. If you have the line pressures in your auto increases then it won’t be a problem.
We’ve made improvements in this area through supplying things like the restrictor etc. In regards to the throttle bodies we sell, many people are happy with them small number though feel that there is room for improvement in this area. In which case we can now supply memcals to suit which sorts it out completely.
Hope this clears up a few things.
Cheers
Steve
i thought that only the vs had problems with the computer.”
The VS computers are more inclined to require a tune given the computing power they have (compared to a VT-on computer), making them less adaptable to larger throttle bodies etc.
On the note of the better fuel economy it would also be reflected by overall power increase (contrary to what some people may speculate) as reflected by a slightly higher air fuel ratio. Meaning more air is entering the engine even at wide open throttle.
Foamy did one for me. Good Value. I have the same gearbox mods and it's a sweet drive now.