1955 Chevy Roots Blower LSX
Ever think of putting the injectors down in the intake and eliminating them from hanging off the Hilborn 4 port? I have! LOL. Use the Hilborn for meth injection to keep the lobes cool and maybe lower the IATs some.
TECH Resident
Joined: Sep 2013
Posts: 994
Likes: 120
From: Mechanicsburg, PA
Now that's thinking outside the box! I like that idea. That Hilborn deal is cool as well.
With the right motor you can squeeze over 1000hp out of a 671. An 871 is a huge honking paperweight ruining your weight distribution and blocking your view of the road. Tell me I'm wrong. If the guy wants nostalgic looks, that is fine, but my comments have been directed at drivability.
With the right motor you can squeeze over 1000hp out of a 671. An 871 is a huge honking paperweight ruining your weight distribution and blocking your view of the road. Tell me I'm wrong. If the guy wants nostalgic looks, that is fine, but my comments have been directed at drivability.
Yes they (Both) are heavy and yes they make a lot of heat unless you run Ethanol/Methanol but they also make huge torque down low and look cool hell sticking out of the hood of a classic muscle car. ( Or any car in my opinion) What's wrong with the drivability other than they stick out of the hood?
There is virtually no size difference between a 6-71 and 8-71, Most people can't tell unless they measure them.
Yes they (Both) are heavy and yes they make a lot of heat unless you run Ethanol/Methanol but they also make huge torque down low and look cool hell sticking out of the hood of a classic muscle car. ( Or any car in my opinion) What's wrong with the drivability other than they stick out of the hood?
Yes they (Both) are heavy and yes they make a lot of heat unless you run Ethanol/Methanol but they also make huge torque down low and look cool hell sticking out of the hood of a classic muscle car. ( Or any car in my opinion) What's wrong with the drivability other than they stick out of the hood?
The blower weighs about 75-80lbs with snout and I'd have to guess that a single turbo with extra pipe/flanges/waste gate and all the associated plumbing is going to be very close that that if not more.
I'm arguing with you merely as a matter of boredom, but the difference is in installed height. turbos tend to sit lower than roots blowers, so the center of gravity is much lower. This affects handling in a big way. This is why pushrod motors are still a thing. The center of gravity is so much lower than with OHC motors that it more or less outweighs the HP benefits on a lot of road courses.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo well, the last thing I am going to be worried about this project is the WEIGHT!!! All steel 55 chevy with a ladder bar/coil over rear suspension....it is going to body roll like no other! Heck, the only thing I am going to worry about is pulling the front wheels off the ground!
So, I am in contact with DIY autotune now and will be ordering a MS3Pro Ultimate. I will run 8 new injectors on a custom plate under the Hilborn 4 port and also utilize the exiting injector holes by running water/meth controlled via the MS3Pro. Should make for a VERY versatile and fun ride!!!
On a side note, it is a 8-71 blower...I found this out by measuring the case length from rotor to rotor. So, I have a 16" case which means 8-71. The 6-71 rotor is only 1 inch shorter...and as mentioned, basically not visible unless you lay a tape measure across the case.
I will start getting sensors together (IAT, TPS, MAP, Ethanol Content, ECT,....), make a 36 tooth wheel for the crank and other engine management things. It will get traction control too...just need to add a few other speed sensors and reluctor wheels. Going to hide some LS2 coil packs under the headers and sneak the plug wires up for a clean look. I think the GOAL is to make this a car that NO ONE would drive on the street AND runs 9's....there is no reason why this car/combo could not be a 9 sec all steel cruiser with the right technology.
The build will begin soon once I get a nice mound of parts and plan together. Should be able to get this done before spring time. It is mainly bolt on stuff and wiring....fingers crossed!
So, I am in contact with DIY autotune now and will be ordering a MS3Pro Ultimate. I will run 8 new injectors on a custom plate under the Hilborn 4 port and also utilize the exiting injector holes by running water/meth controlled via the MS3Pro. Should make for a VERY versatile and fun ride!!!
On a side note, it is a 8-71 blower...I found this out by measuring the case length from rotor to rotor. So, I have a 16" case which means 8-71. The 6-71 rotor is only 1 inch shorter...and as mentioned, basically not visible unless you lay a tape measure across the case.
I will start getting sensors together (IAT, TPS, MAP, Ethanol Content, ECT,....), make a 36 tooth wheel for the crank and other engine management things. It will get traction control too...just need to add a few other speed sensors and reluctor wheels. Going to hide some LS2 coil packs under the headers and sneak the plug wires up for a clean look. I think the GOAL is to make this a car that NO ONE would drive on the street AND runs 9's....there is no reason why this car/combo could not be a 9 sec all steel cruiser with the right technology.
The build will begin soon once I get a nice mound of parts and plan together. Should be able to get this done before spring time. It is mainly bolt on stuff and wiring....fingers crossed!
Would you consider making a 1” or 1 1/4” plate to go under the blower and run the injectors between intake in the blower? People wouldn’t even see the injectors until they looked close! Either way it’s gonna be cool.
I might make the plate "wide" and burry 75% of the injector into the plate. So, if I use short body injectors, you will see very little injector. Not to mention with the hood closed, the plate and injectors will be below the hood. So it will still look freaking awesome!
Well, I need to put the injectors above the blower so what I will do is design and build a 1" thick aluminum plate to hold the injectors. I called 2 blower places and they both told me I need to put fuel ONTO the blower. So no matter what, I need to somehow get fuel onto the blower. So, having a plate under the blower would be great and was hoping to do that but I was advised against it.
I might make the plate "wide" and burry 75% of the injector into the plate. So, if I use short body injectors, you will see very little injector. Not to mention with the hood closed, the plate and injectors will be below the hood. So it will still look freaking awesome!
I might make the plate "wide" and burry 75% of the injector into the plate. So, if I use short body injectors, you will see very little injector. Not to mention with the hood closed, the plate and injectors will be below the hood. So it will still look freaking awesome!
Well, I need to put the injectors above the blower so what I will do is design and build a 1" thick aluminum plate to hold the injectors. I called 2 blower places and they both told me I need to put fuel ONTO the blower. So no matter what, I need to somehow get fuel onto the blower. So, having a plate under the blower would be great and was hoping to do that but I was advised against it.
I might make the plate "wide" and burry 75% of the injector into the plate. So, if I use short body injectors, you will see very little injector. Not to mention with the hood closed, the plate and injectors will be below the hood. So it will still look freaking awesome!
I might make the plate "wide" and burry 75% of the injector into the plate. So, if I use short body injectors, you will see very little injector. Not to mention with the hood closed, the plate and injectors will be below the hood. So it will still look freaking awesome!
He needs fuel through the blower to cool the lobes. I suppose it could be done without if the clearances were opened up, but the efficiency of the blower would probably go way down. Fuel’s been runnin through blowers for ever and almost all have backfire valves on em.
One thing to consider. If the injectors go over the blower, it is just like a carb in one respect. You have an 8-71 size fuel air bomb under your hood. A stuck valve will equal a really big boom. Injectors under the blower do not cause this potential issue. The likelihood of this happening is low, but still must be considered.
one injector above each throttle butterfly (aka tbi, hidden in the scoop) and individual injectors in the manifold under the blower...dual fuel - regular fuel below blower and e85 above = cool blower and awesome performance 
So, one of the not so good things with my setup is that the blower is so wide, it takes up all of the room between the valve covers. I love the idea of dual fuel and would be all about the 2 fuel systems but there is no way to add in more injectors under the blower. That was one of the best parts to the LS 6.0L build....the intake is WIDE and there are bosses that would be machined to add in 8 injectors and have true sequential control. But, as of now, that idea is squashed unless a free 6.0L and 4L80e appeared in my driveway this week.
i see what you're talking about...doh!
that lower manifold is interesting... i think some injectors could be fitted in there and would be all hidden under the blower...it would be alot of work though. maybe i'm not seeing something not having one in person to look at
that lower manifold is interesting... i think some injectors could be fitted in there and would be all hidden under the blower...it would be alot of work though. maybe i'm not seeing something not having one in person to look at
One thing to consider. If the injectors go over the blower, it is just like a carb in one respect. You have an 8-71 size fuel air bomb under your hood. A stuck valve will equal a really big boom. Injectors under the blower do not cause this potential issue. The likelihood of this happening is low, but still must be considered.