Search:

I confirm mpampis's input, its 1.9mm.

I have fitted Schadek oil pump to my Q4, the one also used in Tipo 2000 16v. Direct fit without problems and works very well.

I always suspect that low oil pressure in the Lampredi engine tends to speed up the cam wear rate with respect to other similar DOHC engines. That is the reason I thought higher oil pressures might...

Some updates.

I have ordered forged Wossner pistons and PEC rods (on the way)
I had to resort to OEM spec Pitattore cams as the budget blew up. (these are also on the way)
Cometic MSL head...

You're right Steve. The expense is expanding to spacecraft development budget levels, and I'm so annoyed about this situation. I begin to think that if I will be spending bucks I'd be better building...

I also got some more bad news today completing the whole picture. Piston rings and liners are also gone causing piston skirts to wear out. It seems that the oil passed through the combustion chamber...

Bad news, about 2.5 liters of oil appears to be lost rapidly and the consequence seems to be bitter. My 4 month old OEM cams had significantly worn in just 10 days, requiring now a replacement. Aside...

I also had the balancer belt removed before, the engine is more responsive after 3500 rpm without any noticable vibrations.

I hope so, I will have a dyno test at the first opportunity. I am very curious about the results, particularly the torque figures.

Yes mpampis, the chip is by him.

Yes Steve, indeed it is. 2nd and 3rd gears become much more easy to use in slow city traffic and acceleration flexibility is considerably improved.

I finally had my Q4 chip tuned this weekend by MaxiBoost after completing some of the bits and pieces that might have affected the logs during tuning. This is not the first time that I see the end...

Thanks Jim, this is exactly the gasket I have ordered.

Thanks a lot Jim, this is a very valuable info for me. Anything special about the Cometic gasket installation and application?

mpampis_ you explained it very well and clearly. English is not my native language either, we do our best to express ourselves.

Anyway the Cometic gasket will go to its new home either for long...

I think I will go for the Cometic head gasket at this stage. I will be happy if you can share your experience about the multiple usage of metal layered gaskets. Are they replaced with the new one...

I concur with our ideas that boost is not single source of boost and I'm not final on the IC size and application. However there are very successful applications of the AS950 IC here. I think it will...

mpampis_ do you mean Gr.N or Gr.A Spesso gasket?

As for the intercoolers, I plan to adapt an all aluminum Chrysler AS950 truck intercooler in the next stage. This IC is very common and relatively...

If I happen to replace the head gasket for fear and reliability, would you recommend Cometic MLS Head Gaskets? As far as I remember the OEM head gasket thickness is 1.9mm, so I guess it will be best...

I was not aware that the IC is susceptible to failure at such modest boost levels. Did you experience an IC failure due to such reason?

Thanks mpampis_, now I'm clear to implement the 1.35bar limit rather than 1.2bars. I will have a dyno and share the results with you when chip tuning is done and hopefully goes well with one piece.

Thanks a lot mpampis_. I think I readied enough foundation for my Q4 for the "a bit more boost" thing, here they are,

HKS air filter (mushroom)
Walbro GSS342 fuel pump
Brand new stock cams...

Thanks for the feedback, I have the Maxidata system for monitoring and logging afr, egt, tps, map, coolant temperature and some other data. Thus, the chip will not be an over the shelf type and be...

Dear friends, I will be having a custom chip tuning (MaxiChip) by MaxiBoost Hakan Caliskan here to reach descent 240 hp levels. The head gasket is stock for the time being and I do not plan to...

Very curious to see replies