26 replies to this topic

[hungdynasty]

98 JDM SPI with MPI block, I would like to know which camshaft, SPI or MPI, is in my engine? Thanks very much.

[Bobbins]

Me too!

[mini13]

Is there a cam sensor?

[Steve220]

I'd have a look down the back of the engine block and see if there's a cam sensor

Edited by Steve220, 14 December 2018 - 10:33 AM.

[hungdynasty]

No, there is no cam sensor in my car because Spi doesnt need it I think. But my car uses coil , so no distributor gear either, that's why I wonder which camshaft is in my car.

Edited by hungdynasty, 14 December 2018 - 11:06 AM.

[mini13]

Well, id see if I can get a finger in the cam sensor hole (I assume it's just blamed off) and see if you can feel a round lobe or one with a lump for the mpi sensor.

[mini13]

The mpi one should be easy to feel as it has a grooved lobe.

Edited by mini13, 14 December 2018 - 11:32 AM.

[Retroman]

The only way you will know ultimately is the remove the cam and measure it, measuring can be done in car, but not as accurately

 

As you are running minus dizzy and cam sensor it could be anything...

 

Including a NA cam with a dizzy drive and no sensor lobes

 

Has the engine been rebuilt at some time?

[mini13]

Anyway, it seems the spi and mpi are the same profile anyway from this,

https://www.tapatalk...ures-t5261.html

[hungdynasty]

How about I ask for advice this way, could an A+ non-mpi camshaft be installed in my engine with my engine layout?

[mini13]

It could be, but I think it's unlikely that the factory would have had any.

[nicklouse]

How about I ask for advice this way, could an A+ non-mpi camshaft be installed in my engine with my engine layout?

any cam shaft could be fitted.

 

why are you asking?

[hungdynasty]

 

How about I ask for advice this way, could an A+ non-mpi camshaft be installed in my engine with my engine layout?

any cam shaft could be fitted.

 

why are you asking?

 

I want to do some upgrade on my engine and as I can see many aftermarket upgraded camshafts are specified not for mpi engine, I just want to make sure what to use because of my mpi block.

[mini13]

Ah!

There are 2 reasons they would not be suited,1) the camshaft sensor lobe, which if your not using, it won't matter, and 2) the emissions they will give due to the profile, but that really depends on where you are and what emissions the car will be tested to.

[ukcooper]

it got a petrol pump on the back of engige???? if not its a spi/mpi cam . id leave alone and not try up grade it as emisions for mot ive read up on it and if ya realy wanted upgrade the cam it be a sw5 spi/mpi, but for no major gains......