NGK 8 degree plugs in a dsm?

[TurboB18C1DC2]

this question is mostly to icefire. i have a buddy running a 6bolt .20 over 9:1 static pistons, hks 272, fp green, front mount etc, with dsm link and 660s. do you think he should run 7,8,or 9s. he is trying to run 20psi on pump. as it sits now a/f is in the low 11s, dont know the timing curve, but it does occasionally knock on 7s and less with 8s. if i remember right it pulls a total of about 2-3 degrees when it knocks. hes running gap at .028. any recommendations? i kind of think maybe hes just at the limits of pump, but what do you think?

[roo]

I run the 8's myself and leave the gap at .028. I ran in to issues trying to widen the gap so .028 seemed to work best when I was on the stock ignition.

What pump is he running? I'm running a Walbro 255 HP still. I was having some drop off in pressure up top but I believe that's been corrected now with the rewire. I've been told several times by the dsm community that I'm way over the limits on that pump but for being over the limits I don't seem to have much of an issue running rich as **** at WOT. After the pump rewire I saw AFR's in the 9's pushing 32 psi. I think it would support 600whp just from what I've seen. I really want to test it but I'm getting sick of buying tranny's :(

[TurboB18C1DC2]

I run the 8's myself and leave the gap at .028. I ran in to issues trying to widen the gap so .028 seemed to work best when I was on the stock ignition.

What pump is he running? I'm running a Walbro 255 HP still. I was having some drop off in pressure up top but I believe that's been corrected now with the rewire. I've been told several times by the dsm community that I'm way over the limits on that pump but for being over the limits I don't seem to have much of an issue running rich as **** at WOT. After the pump rewire I saw AFR's in the 9's pushing 32 psi. I think it would support 600whp just from what I've seen. I really want to test it but I'm getting sick of buying tranny's :(

he has the rewire mod. he also has a high pressure whinebro, i think model gss341. in the honda-world you can make 600 at the wheel but some say its pushing pretty close to its limit. will was running it but then switched to a external bosch. but its loud as ****.

turbo mag had some really good fuel pump dyno charts. i have the article but no scanner. ill see if its online

[roo]

Yeah I wanted to try to keep it in tank for simplicity and because those externals are loud as ****.

When I was researching fuel pump options I ended up finding an article where they did test of different fuel pumps at different voltages. It's amazing how much of a difference a few more volts can make. I think boosting a 255 pump to 17.5V was enough to support 900 flywheel if I remember correctly. That may have been N/A though. It's been awhile since I read it.

[TurboB18C1DC2]

Yeah I wanted to try to keep it in tank for simplicity and because those externals are loud as ****.

When I was researching fuel pump options I ended up finding an article where they did test of different fuel pumps at different voltages. It's amazing how much of a difference a few more volts can make. I think boosting a 255 pump to 17.5V was enough to support 900 flywheel if I remember correctly. That may have been N/A though. It's been awhile since I read it.


Yeah voltage is huge. but in the same sense it is harder on the pump. for example the aeromotive 1000 pump i heard is prone to failing on street cars if you dont get the voltage regulator. and new electric or digital fmus that race voltage with boost or load to the pump to increase flow instead of pressure like a regular fmu are interesting

[DSMMIKE]

whats the stock range i forget i believe im running 2 degrees colder

[TurboB18C1DC2]

whats the stock range i forget i believe im running 2 degrees colder

stocks should be 6ers

[Kelvin]

stock is 6, i ran 7s on the gold car. i will be running either the bosch 044 in tank, or the magna2000

[TurboB18C1DC2]

stock is 6, i ran 7s on the gold car. i will be running either the bosch 044 in tank, or the magna2000

the bosch pump is decent

[Kelvin]

there is a nice writeup on dsmtalk on how to set it up in tank...i mean ill post a write up on here claiming its my work.

[TurboB18C1DC2]

there is a nice writeup on dsmtalk on how to set it up in tank...i mean ill post a write up on here claiming its my work.

yeah we ran that pump external.

and yes ross you do that

[roo]

Yeah voltage is huge. but in the same sense it is harder on the pump. for example the aeromotive 1000 pump i heard is prone to failing on street cars if you dont get the voltage regulator. and new electric or digital fmus that race voltage with boost or load to the pump to increase flow instead of pressure like a regular fmu are interesting

Interesting. I heard the Aeromotive 1000 pumps had overheating problems in street use. Didn't know it was voltage related. Kind of a poor design in my opinion if it can't live without overheating under the normal 12-14 volts. I saw some pictures of people submerging the pumps in the fuel tank to combat the issue. Looked kind of odd seeing it mounted at the bottom of the tank but supposedly it'll operate submerged in fuel like that.

When I was researching I was looking at the KB boost a pump to regulate voltage higher only when I needed it to minimize pump wear. Aeromotive has a unit too but if I remember correctly it didn't have a port for boost reference like the KB unit.

I've seen some guys use dual in tank pumps as well but I've always had concerns about using dual pumps like that. If one would happen to fail at the wrong time your chances of a lean but still able to fire condition is much greater. I would rather have one pump fail and kill fuel pressure altogether.

I've had really good luck with the walbro unit so it's hard to justify buying something bigger when this one does everything I need. My only issue now is once I burn off the rest of my race gas I'm going over to E85 which is going to require more fuel yet so I may have to revisit the issue, although I still should be able to get at least 450hp out of it so I may be fine. I would rather detune my car a bit and have the tranny live then shoot for a higher number and keep blowing tranny's.

[TurboB18C1DC2]

Interesting. I heard the Aeromotive 1000 pumps had overheating problems in street use. Didn't know it was voltage related. Kind of a poor design in my opinion if it can't live without overheating under the normal 12-14 volts. I saw some pictures of people submerging the pumps in the fuel tank to combat the issue. Looked kind of odd seeing it mounted at the bottom of the tank but supposedly it'll operate submerged in fuel like that.

http://aeromotive.carshopinc.com/product_info.php/products_id/3296/16302

it is recommended in the honda world if you daily drive your pro-am car.

and some do submerge the pump in the tank some by fuel coolers. im not a huge fan of those fuel coolers though. it might be just cause i dont know much about them. i am assuming the guys that run the fuel coolers run them inline off the feed line from the tank before the pump.