which spark plugs are best to fire under high boost??

[avefenix]

I am new to this however building cars i am not too new too...I own a 96 eagle talon tsi, i have the capability to run 25 to 30 psi boost anyime and even higher...however i am having one problem...I have modded fuel system with a stronger pump and injectors and a much larger turbo, we have modified the block to handle mych higher boost applications as well and the intercooler with bov setup is complete with an ecm upgrade...my problem is this...

under high boost which is the absolute best spark plug to use that will fire properly under higher boost, and fuel flow???

there are several options but i wish to do this all one time the RIGHT way...

 

[Mitch41]

Stock plugs are: NGK BPR6ES.
Just the regular copper plugs.
General rule of thumb is:
- #6: stock or mildly modified engines running up to 15psi on stock turbo
- #7: stock or mildly modified engines running OVER 15psi on stock (or near stock) turbo
- #7: stock or mildly modified engines running up to 15psi on larger (but not huge) turbo
- #8: stock or mildly modified engines running OVER 15psi on larger (but not huge) turbo
- #8: modified engines running modest boost on big turbo
- #9: modified engines running big boost on big turbo

 

[Ravenous]

Most often we us BPR6ES but in high boost applications we usually us colder plugs to avoid detonation so a BPR7ES or BPR8ES would be suitable. However if you honestly believe that your spark is blowing out it might be in your best effort to try a non-projected plug like a BR7ES or BR8ES.

 

[MY1GDSM]

OP The search feature is there for a reason... .

http://www.dsmtuners.com/forums/bolt-tech/422682-what-plug-wires-you-running-30psi-range-stock-ignition.html this has both input from people about wires and Plugs... .

 

[avefenix]

thank you for the link and the input, ill look into the NGK BR8ES plugs, from the power other dsmers are putting out using these plugs it is worth a try

 

[this_tsi_8urV8]

7's most of the time are sufficient for most DSM's. Just start playing with the gap, make it smaller as boost increases. Of course, there is such a thing as going Too small.

 

[avefenix]

my dyno readout is currently just under 650 whp however i am about to upgrade the turbo capable of much more....at this time what would be the best gap for my vehicle...its the one thing i have been pondering for some time, along with the air to fuel ration..everything else is where i want it...

 

[DSM1G90]

Some use unprojected plugs (BR6ES, for example) so the extreme high compression doesn't blow out the spark as easy as does with using the projected (BPR6ES, for example) plugs.

 

[BigKnick]

I have tried both the BPR7ES and the BPR8ES, and while I only run a 16g @19 psi I have most definitely noticed that the 8's last considerably longer for me.

 

[ktgurl87]

This topic has been beaten to death and then beaten again. Go look through the tech articles. Do a search for spark plugs and gap. Guarantee you will find your answer. But you need to find it yourself. It's not going to help you if you don't do it on your own...you'll never learn anything that way.

 

[JusMX141]

http://www.dsmtuners.com/forums/bol...s-you-running-30psi-range-stock-ignition.html

^ Good plug suggestions within this thread.