Mivec Owners Group
http://mivec.co.nz/forums/

Helpful info
http://mivec.co.nz/forums/viewtopic.php?f=29&t=6167
Page 1 of 5

Author:  loch [ 15 Feb 2009 17:40 ]
Post subject:  Helpful info

here are some proven facts, things i have done or witnessed to.
jus thought i would put this up to help with the info.

note this applies to the 2nd gen, 1st gen observations may vary


1. the standard mivec rods are good to 20 psi of turbo pressure

i have 3 friends that have turbo charged on stock mivec rods

1 with a td04 and one with a huge t3/t4 turbo, 1 is street driven and 1 is street/track driven. the td04 ran 18 psi daily and the guy with the t3/t4 ran 22 psi on stock rods, never broke or bent a rod. tdo4 guy ran up to 8200 rpm, t3/t4 guy ran up to 8500 rpm full boost.


here is the guy with mivec rods and vr4 pistons on the dyno

http://www.youtube.com/watch?v=ZUhUAvao ... re=related

2. gsr pistons will drop your static compression to around 180 psi per cylinder

vr4 pistons are a straight drop in and drops compression to around 175 psi

3. the single cam 4g92 bottom can be built to mivec spec with a mivec head but note the sohc oil pump carries a pully setup for the sohc head, u have to use the mivec or 1800 dohc oil pump if using the mivec head

pistons , rods and bearings are the same size
only difference between a mivec block and sohc block are
1. no coolant warmer at the rear
2. no oil squirters in the block

bearings are the same size and factory crank in the sohc are the same as in the dohc mivec.

4. 2nd gen 1800 mivec requires a supra 7mgte timing belt
159 teeth.

5. gsr injectors are a direct drop in in terms of fitment and connector for injectors.

6. stock 2nd gen mivec pump can support up to 15 psi of boost

7. gsr manifold is a straight bolt on to a mivec head

8. for turbo, oil feed can be taken from the oil sender port

9. the 1600 oil pump will bolt back to a 1800 block and an 1800 pump can bolt back up to a 1600 block

10. 1800 and 1600 water pumps are identical

11. the sumps are interchangeable but on a 2nd gen, a mivec sump is slightly deeper than a gsr sump.

12. sohc head gaskets will work on dohc heads but sogc gasket arent metal and are thicker and may drop compression. also sohc gasket is 1 layer of some sort of fibre like material, also note that 4g91 gaskets are also dimensionally the same but also non metal, 1800 galant GDI engines carry a multilayer metal gasket

13. sohc cam, crank, front and rear camshaft seals will work on dohc setup just fine.

14. 3sgte ARP headbolts are a perfect fit for 1600 or 1800 setups

15. a stock suzuki vitara pressure plate can be used for upgraded clamping force

16. mivec coil packs and gsr coil packs are interchangeable
suzuki jimney and vitara coil packs are interchangeable
will add more as i remember

17. 4g92 and 4g93t carries the same crank and cam angle sensors

18. a stock mivec radiator can support up to 15 psi of boost and supply optimal cooling, there may be clearance issues with the stock radiator fan and any turbo u decide to use, u will melt the fan shroud with the turbo.

19. 4g92/4g93t fuel injection uses batch injection and not sequential as i thought. when cutting into my harness to add resistors it was found that 2 main injector wires go to the 4 injectors.

20. Clutch master cylinder on a mivec is exactly the same cylinder as the evo 4. down to the part number.

21. on boost its best to activate the mivec a little later since the high cam will overlap and reduce the efficiency of the turbo.

22. stock injectors or good for 4 psi of boost with an rpm limit of 7000 rpm on a tdo4 and gsr pistons any bigger turbo or any higher rpm and u will melt down (note tuning and engine management still required on stock injectors)

23. auto to manual conversion the starting motors are the same.

24. honda b16 turbo exhaust manifolds are almost the perfect fit for the mivec. slight modification required for alignment to the ports

Author:  trinifx68 [ 21 Feb 2009 23:50 ]
Post subject:  Re: Helpful info

Great info man, keep posting. [Trinidad]

Author:  JDMspec [ 26 Feb 2009 10:53 ]
Post subject:  Re: Helpful info

loch wrote:
16. mivec coil packs and gsr coil packs are interchangeable
suzuki jimney and vitara coil packs are interchangeable
will add more as i remember


You sure they are interchangeable, cause i thought due to the taller mivec head that the coil packs on mivec have a longer sleeve than the GSR coil pack. Also i checked in the Caps program an i got the part number MD325053 being specific to the 4G92mivec engine only. However i stand to be corrected .....

Author:  loch [ 27 Feb 2009 10:06 ]
Post subject:  Re: Helpful info

im speaking about the coil packs themselves not the boots

Author:  JDMspec [ 04 Mar 2009 11:24 ]
Post subject:  Re: Helpful info

loch wrote:
im speaking about the coil packs themselves not the boots



k safe

Author:  -Jarred- [ 05 Mar 2009 15:25 ]
Post subject:  Re: Helpful info

Might want to include that the VR-4 pistons used are 81mm bore 6A13TT ones. Not 85mm 4G63 ones or 78.4mm 6A12TT ones. Just to clear up possible confusion.

Author:  DeanColt [ 06 Mar 2009 11:58 ]
Post subject:  Re: Helpful info

very good post man fair play!

Author:  Kot [ 21 Mar 2009 11:37 ]
Post subject:  Re: Helpful info

4G92Mivec wrote:
loch wrote:
16. mivec coil packs and gsr coil packs are interchangeable
suzuki jimney and vitara coil packs are interchangeable
will add more as i remember


You sure they are interchangeable, cause i thought due to the taller mivec head that the coil packs on mivec have a longer sleeve than the GSR coil pack. Also i checked in the Caps program an i got the part number MD325053 being specific to the 4G92mivec engine only. However i stand to be corrected .....[/quote
i have the caps too and i have checked!!!!!The coil packs of mivec gen2 are differend from others mitsu coilpacks and are very expensives too!!!!!!!

Author:  loch [ 23 Mar 2009 13:16 ]
Post subject:  Re: Helpful info

ok let me clarify.
the coil packs them selves not the boots are interchangeable

you can actually pull the boots off the coil pack.

Author:  welshy [ 27 Mar 2009 23:32 ]
Post subject:  Re: Helpful info

I bought a set for a CE 1.8 which in oz im pretty sure is a 4g93 and they seem to be excactly the same with the same boot aswell. If that helps any

Author:  JDMspec [ 31 Mar 2009 16:58 ]
Post subject:  Re: Helpful info

cool thanks man

Author:  98colt rs [ 09 Apr 2009 04:51 ]
Post subject:  Re: Helpful info

good post cause i didnt kno some of those stuff buddy

Author:  loch [ 20 May 2009 07:36 ]
Post subject:  Re: Helpful info

i know now from first hand experience mivec rods for a fact can take 22 psi of boost from a big tdo5-16g at 8500 rpm, these stock rods are amazingly strong, who is it that claimed that you cant go over 8 psi and stock rods?

i've now tapped out the efficiency of my current turbo and now need to go bigger.

Author:  magn1t [ 20 May 2009 10:15 ]
Post subject:  Re: Helpful info

A lot of people get confused over the strength of parts. It's not the parts that usually fail, it's a bad tune that makes them fail. Even aftermarket parts will fail if the tune is bad enough.

Steve

Author:  morpheus23 [ 11 Jun 2009 18:11 ]
Post subject:  Re: Helpful info

Really Helpful info

Page 1 of 5 All times are UTC + 12 hours [ DST ]
Powered by phpBB® Forum Software © phpBB Group
https://www.phpbb.com/