Spark Blowout?
05-12-2008, 03:59 PM
#12
2nd Gear Member
Thread Starter
Join Date: Nov 2007
Location: CO
Posts: 439
RE: Spark Blowout?
ORIGINAL: Simon1
Tell me you don't have the factory plugs in? You need to invest some $$ in HTOs if you haven't already.
There is a special gapping tool you can buy for $20 or so and you will need a wire gap checker.
It's not if, but when, those stockers will turn in glow plugs and break off into the cylinder putting a nice window through your piston.
I beleive thecorrect gapping for 8-10 psi is.032-.034. That and a real tune will solve your issue.
Did you do the CMCV yet?
ORIGINAL: breathegood
Now I'm getting mixed answers. I've been progressively leaning out the tune using my Predator, and the problem doesn't seem to be going away, but it's possible I haven't leaned it out enough yet. If I weren't so fricken busy right now, I would just shorten the gap on the factory plugs as a test. If they are new and aren't ceised into the head, how long should a plug swap take? Intuitively to me, it seems that spark blowout would cause the AFR to show rich conditions.
Now I'm getting mixed answers. I've been progressively leaning out the tune using my Predator, and the problem doesn't seem to be going away, but it's possible I haven't leaned it out enough yet. If I weren't so fricken busy right now, I would just shorten the gap on the factory plugs as a test. If they are new and aren't ceised into the head, how long should a plug swap take? Intuitively to me, it seems that spark blowout would cause the AFR to show rich conditions.
There is a special gapping tool you can buy for $20 or so and you will need a wire gap checker.
It's not if, but when, those stockers will turn in glow plugs and break off into the cylinder putting a nice window through your piston.
I beleive thecorrect gapping for 8-10 psi is.032-.034. That and a real tune will solve your issue.
Did you do the CMCV yet?
No, I haven't done the CMCV yet either.
05-12-2008, 04:09 PM
#13
6th Gear Member
Join Date: Sep 2006
Location: Gainesville, FL
Posts: 11,278
RE: Spark Blowout?
ORIGINAL: breathegood
The car only has 5200 miles on it and only ~2100 of those are blown, so no, I haven't changed the factroy plugs yet. I went with cooler plugs on my S/C Tacoma to help alleviate some spark knock that I was having, and found that the truck runs better with the hotter plugs and more timing retard, so I'm not entirely convinced that swapping to cooler plugs is a universally good idea on all F/I applications....What I learned with tuning my truck for forced inductionsis that what works well for the massesat sea level, doen't necessarily apply at 6200'. If I go to the trouble of pulling the plugs, I would like to at least try the HTO's, but it seems like an expensive, and rather arduous proposition for something thatought tobe cheap, quick, and easy.
No, I haven't done the CMCV yet either.
The car only has 5200 miles on it and only ~2100 of those are blown, so no, I haven't changed the factroy plugs yet. I went with cooler plugs on my S/C Tacoma to help alleviate some spark knock that I was having, and found that the truck runs better with the hotter plugs and more timing retard, so I'm not entirely convinced that swapping to cooler plugs is a universally good idea on all F/I applications....What I learned with tuning my truck for forced inductionsis that what works well for the massesat sea level, doen't necessarily apply at 6200'. If I go to the trouble of pulling the plugs, I would like to at least try the HTO's, but it seems like an expensive, and rather arduous proposition for something thatought tobe cheap, quick, and easy.
No, I haven't done the CMCV yet either.
05-13-2008, 03:39 AM
#15
5th Gear Member
Join Date: Dec 2006
Location: Redding, CA
Posts: 4,552
RE: Spark Blowout?
ORIGINAL: zkiller
Don W has been running HT1 on his supercharged car forever never a problem, just needs to be gapped right. In fact he said his car did not run on HT0 plugs very well. You only need the colder pugs if you are getting spark blow-out. If you are not , then installing colder pugs could cause them to foul easily. Spark blow-out pops in the exhaust and causes hesitation too. I would see if gapping the HT1s fixes the problem. If not buy a set of HT0 and gap them to .028 to solve the issue.
Brenspeed can send you the plugs pre-gapped if you need them.
Don W has been running HT1 on his supercharged car forever never a problem, just needs to be gapped right. In fact he said his car did not run on HT0 plugs very well. You only need the colder pugs if you are getting spark blow-out. If you are not , then installing colder pugs could cause them to foul easily. Spark blow-out pops in the exhaust and causes hesitation too. I would see if gapping the HT1s fixes the problem. If not buy a set of HT0 and gap them to .028 to solve the issue.
Brenspeed can send you the plugs pre-gapped if you need them.
I'm surepeople can get away with running them for a while with their power adder,but why would you risk it knowing they aren't made to work in the application they are being used in? A $100 invested in some security just seems like the right thing to do.
Thread
Thread Starter
Forum
Replies
Last Post
stangin1996gt
4.6L (1996-2004 Modular) Mustang
0
09-21-2015 11:01 AM
