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finally got my long block assembled and mocked the blower system up to check the drive length. worked out great. it's 13:1 with 11 degree heads and a 240-255-110 cam from cam motion....on e85 of course. I am just going to put 6-8 psi into the engine. the blower is mainly to complete the rat fink look of the car. it's going in my 32 roadster and needed plenty of altitude to get the pulley up through the hood line. it's backed by a t56 with a rxt twin clutch and a quick change rear with 5:41 gears. just a driver. but at 2300 lbs it should wax a few crotch rockets when needed.
My belt will actually skip a tooth and make a snap noise on a cold start (sub 50*F). Your belt tension hot is critical to not hurting the blower drive or crank snout. It's amazing how much the engine and blower expand as they heat up. Can't wait to see it in the car!
it needs to be tall. the engine sits low in a 32 roadster and the body is tall. I wanted the top pulley partially through the hood line so people could see it spinning and know that it is blown. I obviously don't agree that a lower intake would look better. I am going for the full on rat fink look. the rear tires are 33x22x20 mickeys on 20x17 wheels and the car has massive side mount exhausts. everything about it is radical.
My belt will actually skip a tooth and make a snap noise on a cold start (sub 50*F). Your belt tension hot is critical to not hurting the blower drive or crank snout. It's amazing how much the engine and blower expand as they heat up. Can't wait to see it in the car!
belt tension changed alot on my old school sbc, I used to run about 1.5" of side to side play with the engine cold. it was snug when hot. I will adjust this one to snug when at full hot sitting in traffic idle.
Not everyone has the same tastes, Personally I think the use of tall intake and spacers and crap looks stupid but I also think ricers are a waste of space also lol Edit: I think anything used for the purpose of making a car look like something it's not or made to make it look extreme but serves no real purpose is stupid, Huge tires and not enough power to turn them, Fake Blowers, Fake stack injection and so on...I do applaud you for using the blower hat as a hat and not setting it on carbs with a spacer like some do. You'll definitely stand out if that's what you're going for.
Do you have one or more of the butterflies blocked or using a progressive setup?
I'm trying to get this setup as low as possible so it fits under the hood of a 35 ford 5 window coupe.
Last edited by LLLosingit; 04-14-2022 at 10:49 PM.
it needs to be tall. the engine sits low in a 32 roadster and the body is tall. I wanted the top pulley partially through the hood line so people could see it spinning and know that it is blown.
If they can't tell by the sound that you're running a blower then they wouldn't know what a blower is in the first place. People can hear a blower car coming before it's seen most of the time.
like it or not, street cars have always been about the look. and if you think it wont turn those big tires at will, you are sadly mistaken.
I am not building it hoping that it meets with other people's approval. I am building it to meet with my approval. I want people to see it rolling on the street and say "HOLY, MOTHER OF GOD! LOOK AT THAT!".
no progressive. the hat actually has the 2 outside butterflies blocked off and one of the jo blo filters behind the center one. it's not much of a real filter, but it beats nothing by a longshot.. all of the real filters that fit the enderle hats are ugly and take away from the whole look of the hat. I had a progressive 4-3/8 bau on my last sbc and it would not idle down enough. the air leakage around the two non progressive butterflies was just too much and the smallest bau just looks out of proportion to me.
this thing will be a show stopper....and will knock off a crotch rocket if called on. that is what I am after. what more could you want in a real street car?
The OP is going for a look, as said the Rat Fink look, and I think he is killing it. Some prob dont know what that is.
I ran a couple Prochargers on LS engines, my concern was so little crank snout sticking out, and the farther out you space things, the more "leverage" the belt has on things. Back in the day a few SB's snapped the crank off, they even had snout supports, or SB's with BB snouts. I haven't heard of LS's breaking the cranks, spring loaded idlers are prob easier on things, and as said, belt tightness.
like it or not, street cars have always been about the look. and if you think it wont turn those big tires at will, you are sadly mistaken.
I'm not knocking you for going after the look, If you like it then that's all that matters.
I'm not doubting yours will turn the tires the point I was making is that quite a few go for the my car is a pitbull look and have a heart of poodle under the hood.
I have one hole blocked and it took some work on the butterflies to get them to seal well enough to not leak, I tried the filter in the hat (Not the same as yours) and it choked the motor so bad it wouldn't run right at high rpm so it had to come out, Now I'm looking at a custom filter housing similar to what I used when I raced.
Originally Posted by forcd ind
I haven't heard of LS's breaking the cranks, spring loaded idlers are prob easier on things, and as said, belt tightness.
The motor in the picture I posted had that issue before I bought it from a forum member (possibly belt to tight), It didn't snap the crank but it did put so much force on the snout that It killed the crank and actually broke a main cap. The shop I use for my machine work does a lot of blown alcohol and nitro motors and his thought was that the crank flexed to much and basically wasn't controllable without a crank support. The motor now has pinned billet mains and a crank support. I've chatted with a few others who ran a roots, Some ran a support and others didn't. The only issue anyone mentioned was finding crank walk and oddly worn main bearings when they went to freshen the engine.
04-10-2022, 07:58 PM
my roots blown 6.2 finally mocked up. 
. that thing looks beastly! 
