16 replies to this topic

[TFD]

I was looking around to check my sparkplug heat range. Now due my boosted upgrade (2.2 turbo) I want to change to a 1 step colder plug. I now run the OEM NGK LTR6B-10T plugs.

 

Here's the confusion:

 

The Z22SE engine comes with the NGK LTR6B-10T sparkplug,

It seems the USA guys run a LTR5 (or simular ac Delco) plug as OEM = 1 step warmer.

Then there are the people here who run SC stage 2 with OEM plugs....(as well as recomanded by DBilas with there 2.2 turbo setups).

 

.. so I'm a bit confused here what to get. Heat range 7 doesn't seem to hurt but I want some more info before spending 35 quid for nothing.

 

Cheers

[CHILL Gone DUTCH]

I would do a few miles on the car and then check the spark plugs condition
I did a bit of this last year



This will help but you need to no the fueling is ok first

[Rosssco]

The standard plugs seem to cope ok on SC engines (well, mine have), so do you NEED a change..?

[CHILL Gone DUTCH]

Currently using these



But Ito I ally the Saab uses the same type of plug as a turbo

[CHILL Gone DUTCH]

I did contemplate going a step cooler this year

[CHILL Gone DUTCH]

[tibby]

Spark Plug Bosch HLR8STEX Recommended until 300 z22se horsies

[CHILL Gone DUTCH]

Go one step cooler I remember reading per 100 hp

[CHILL Gone DUTCH]

i choose 7 last year from 6s (NGK) the year before, it was suggested to go for 8s but lowering the compression of the engine can change the temp range also ie need to go hotter with a lower compression 

[CHILL Gone DUTCH]

NGK also say to run a cooler plug rather than a hotter plug if your unsure because there is less chance of damage to engine because of the tip getting to hot

[TFD]

Thanx for the replies guys. Most of it I allready found on the web though lol... Its more the confusion if the oem plug is a 5 or 6 grade. If the US boosted guys go 1 step colder they go to grade 6... which we allready run. @Tibby: Thats a grade 8 plug. To cold in my opinion. We ran a 7 on the 400hp sr20's. I think I'll get a set of NGK LTR7IX-11's and gap them to 0.7. The turbo makes more torque than SC and I run more boost than the DBilas setup. Cheers

[CHILL Gone DUTCH]

do run a saab head ??

[TFD]

No, stock z22se engine.

[TFD]

I found out that people here also run the [color=rgb(90,90,90);font-family:Arial, sans-serif;font-size:13px;]NGK [/color]PTR5A[color=rgb(90,90,90);font-family:Arial, sans-serif;font-size:13px;]-10' as stocker plug.[/color]

 

[color=rgb(90,90,90);font-family:Arial, sans-serif;font-size:13px;]@Tibby: Sorry my bad, the Bosch uses a different heat range number (as in the chart from Chill).[/color]

[color=rgb(90,90,90);font-family:Arial, sans-serif;font-size:13px;]Bosch 8 range is a NGK 5 range. I think I'm allright with the NGK 6's grade plugs. See how it goes ;-)[/color]

[CHILL Gone DUTCH]

The standard ones which came with the Saab turbo engines were NGKR pfr6d-10g But are not z22se shaped

Edited by CHILL Gone DUTCH, 26 February 2016 - 09:06 PM.

[TFD]

From what I've found out, most stock turbocharged engines come with 6 grade plugs as standard and are able to hold on for a few more tuning "stages".

I'll keep the 6 grades and hopefully do some decent learningsessions this weekend. We'll find out if the new plugs are up to it.

[tibby]

Hey Daan The good thing of the Bosches is they have 3 points for giving a spark. ( i know, only one is being used, but in case of pollution there's more change giving a spark) You really do not need fancy panty irridium or something Sparks (where the tips can burn off)....Just keep it simple. grtzzzzzzzzzzzzzzz