SuperiorRam

Well I have a 89 rotary pump engine in the short box drag truck and it will stay rotary powered with most likely a 4k spring
I'm asking your help here to build the fuel system from lift pump to injectors
it'll have a he351 over s475 for air (maybe air to air between stages) and water to air on intake with seprate coolant
head work, studs, springs all well known needs
trans will be get this a Allison 545 for the reason of setting a record rotary/545 pass in the quarter (Which shouldn't be too hard cause who does that) and after that hopefully a 47rh but only after the 545 makes a record the
the truck it's self is a 83 regular cab shorty 2wd half ton the back of the head is about an inch from the back of the dash (looks like a 4bt with the hood open)
anyway this thread is for a high performance engine build I couldn't find anywhere else! You guys are the best and I'm looking to you for a fuel system build
thanks Eric

jimbo486

i'd say for the lift pump, go with the adjustable regulator airdog II. maybe the 150 gph. as for injectors. there are a lot to choose from. a lot of guys are really happy with DDP's competition injectors. the 70lpm injectors are big enough for really good power.

dzl_damon

To get above 400hp (easier that is), a 14mm H&R will be required.

SuperiorRam

Other than rockentech where does a feller get one?

fatt

Over 400 can be done on a 12mm, but I don't know if it's easier or harder than a 14mm. Most folks tend to shy away from the 14 because of reliability issues.
I'd get in contact with KTA over on 1stgen.org for anything to do with a 14mm head.

SuperiorRam

This truck is not gunna be street driven, the 14 is gunna be a must have, the highest possible horse power, being that the fire wall is moved so far back the truck must run in the pro street class with the NHRDA so some what competitive would be cool

dzl_damon

I've only heard of a few guys over 400hp (by much) with a 12mm head. Might even be ONE in the 500hp range, but all the higher power guys have 14mm pumps.

Ahineman

I'd give John Russin a call for the injectors, and other build advice. 1-440-968-3813. 6x16s or 6x18s. Id also think about running a bigger top turbo, maybe a 62/71/14 or so. If you don't have your s475 yet check out www.turbosupply.net for the cheapest price, part number 171702. For the lift pump setup, most of the guys running the 14mm head with any luck are using an Aeromotive A1000 with a boost referenced regulator and -8AN lines.

jimbo486

a 14mm H&R with a 4mm camplate is where you run into reliability issues. running the 14mm with a stock or 3.2mm camplate will make for a more reliable pump.

jimbo486

also, i know of a 12mm pump that should soon be making enough fuel for around the high 400hp range.

SuperiorRam

Yeah yer totally right on the he351
have the 475 already
keep it comming guys

SOOT4BRAINS

Whats the over all horse power goals for this rig? I ran a high performance 14mm pump with an airdog 150 and it supplied plenty of fuel. It kept up with demand. As far as running a boost referenced regulator, its not totally necessary in my opinion. As long as you are getting the proper volume of fuel, pressure is not so critical. Most guys do this to try to keep case pressure up when doing hard pulls. This is kind of a bandaid for a week vane pump. On my big pump I had the case pressure set up higher to help this but left the input pressure to the pump the same. Raising case pressure allows more fuel to be pumped into the case and less of it going through the regulator and just getting circulated around. This kept the case pressure up high enough at full load to keep the timing fully advanced. But jacking up the case pressure up also screws with timing. I ended up with a pump that is not too street friendly but performance wise was great. Also it has more dynamic timing as well. Gave a bit too much timing down low and I was going to shim the spring to make it a bit stiffer (it already had the stiffest spring available) but didnt get the chance before a governor issue forced me to put my stock pump back on. But this pump would really throw you back in the seat for sure. Way too much fuel for the s300 I'm running. Probably run great with the twins you are going to run. All this pump work was done by Giles at Performance Diesel Injection. Lots of other work went into this pump. I am currently having him build me a 12mm with all his tuning mods but having him leave the case pressure stock as I dont think a 12mm head will suck it down as much as the 14mm. I need something streetable and reliable. The 14mm sadly will sit on the bench until I get some more air and another truck for work. As far as injectors go I really like DDP. I have never run any of the EDM'd injectors so I can't compare but the guys at DDP are great and the injectors run pretty clean and make good power. So Airdog or aeromotive fuel supply, call Giles about your pump needs and he'll walk you through what you need and some big DDP's is what I would recommend for some good power. This is all under the assumption you have a money tree in your back yard. Let me know if you want info on the pump mods.

dieselJon

NITROUS!!!!

It will help.

JAyers

On injectors...big is not always the answer. And DDP injectors are 155* spray pattern...if your going to run 25*+ timing I would recommend staying with 145* spray pattern, the 89's have the industrial bowl so that will also help with keeping the flame under control. I recommend SDX injectors personally. Ive ran 6x.016's for a few years and around 15k miles. Ive had both Scheid and JL injectors. Both sets have performed horribly as far as longevity and cleanliness is concerned. Im switching to a 5 hole 140* set.

Ive had great luck with my benched 14mm, rocken-tech head. With over 60 dyno runs and 6 to 7k miles, I honestly would not be afraid to drive it to the west coast and back.

Other then that...good luck and have fun!

92smokin blacky

I'm positive you can get over 400hp with just a 12mm h&r. But might as well go with the 14mm if you wanna go all out. I've heard its like an automatic 100 horse gain???