SDX 5x.020

[Richie O]

Mike 8061, you should look into a HP piston pump with a pressure regulator if you want to stay mechanical. Should keep up with a 12 mm IP, and if it doesn't you could tee in a holley black with a check valve to the outlet of the piston pump. That way you'd always have a mechanical fuel supply. Richie, you must have more than 301 hp with the 62/71/14? Isn't that number with the gds h1c?

I have not changed the fuel settings for years. The best was 301 hp with the stock tires on. I switched to bigger tires and lost about 20 horses. I have not dynoed with the HTT yet, but don't suspect I will gain much power as I have not added any fuel. I am seeing the same boost as I was with the GDS, and a little cooler egt's. ( though, not much cooler ) If I got back to 300 horses with my bigger tires and no changes I would be surprised. I am a low torque fan, so I have left the timing stock. I am at 730 foot pounds even when I am under 300 horses.

[JQmile]

I run 6x16s and a 14mm....

Made 447 at the wheels with no intercooler...

I haze at idle, and most other times too, but if I keep the rpm up (manual valvebody) I can drive it with no smoke. More than anything else, I noticed the haze from putting on the 0.020 head gasket, and running 30psi to the injection pump all the time to keep the 14mm happy.

The 6x16 14mm combo makes way more fuel than I could ever burn at 450 to the wheels, and hit 599 with nitrous, so 5x18's or 5x20's would seem to be overkill, but other than the smoke I don't see too much of a disadvantage in the extra fuel.

[mike8061]

Should just wire in the seperate voltage regulator i have then i wouldnt be worried about the charging system. always have an alternator behind the seat anyway.

Well if 6x16 can do 700ish with nos then i suppose 5x18s will do anything i'm planning

[mike8061]

So saw the dyno run with the 5x .025's seemed like there was no extreme haze before he got on the fuel? cant really tell whats going on as i have no sound right now.

Was about to order 0.018's now im thinkiing .020's are possible again.

[dazedandconfused]

He is also extremely over fueled and made poor numbers fuel only because of it. If you want to spray the bejesus out of it then go for huge sticks. He still has allot of fuel left to clean up even with all the nitrous.

[oldestof11]

For the record, those fuel only numbers were with low boost too...

He said they are fine with about 1/4 throttle. Went up a mountain and there was no haze, with video for proof. Beyond 1/4 throttle, they were really smoky.

Something I haven't seen, what is the GOAL of the truck. Not just now but in the future.

[AHineman]

He is also extremely over fueled and made poor numbers fuel only because of it. If you want to spray the bejesus out of it then go for huge sticks. He still has allot of fuel left to clean up even with all the nitrous.

^^^^
True that.

For the record, those fuel only numbers were with low boost too...

He said they are fine with about 1/4 throttle. Went up a mountain and there was no haze, with video for proof. Beyond 1/4 throttle, they were really smoky.

Something I haven't seen, what is the GOAL of the truck. Not just now but in the future.

He made 447 fuel only with the gates set normal and 6x.016s...
Not exactly setting the world on fire all things considered. Trying to compare his truck to anything you are going to drive alot is not wise at all in my opinion. Its setup to get a big number on the dyno and not much else. KTA has said in past that for a fuel only setup, anything over 6x.016s with a single, or 6x.018s with twins will make less power. Something that smokes like a freight train at anything over 1/4 throttle is not a street setup.

[mike8061]

Truck is a toy, no longer the DD. hauling bikes and sleds down logging roads is 90% of its life now.

The goal is as much power on fuel as possible why still drivable. It will very likly never see a dyno. I'm looking for the biggest injector possible that will not haze horrible at idle or cruise. Smoke on the top end is good means I can keep moddifing for more air and already have the fuel for it. When i run out of smoke them I'll get the 14mm.

If rust bucket could make it to 1/4 throttle without haze and 5x.025 then i'm thinking I could manage that with 5x.20's as well. I'm thinking with those huge sticks and only a s300 hes likly already out of air buy then. which seems to match his fuel only numbers.

[dazedandconfused]

You will be lucky to drive the truck empty without it cooking with a single and 5x20s. You put any weight behind it or in the bed you will be constantly watching the egt gauge to keep from melting it to the ground.

[Remps]

Go with 6x18 if you need more than 5x18. It'll cost a little more though.

[mike8061]

do you say that because there a little smaller than the 5x20 or because of the smaller holes?

How do you find the 5x18's for haze?

[Remps]

They haze a little till its fully warm. The 4x13's were much nicer to drive around town.