Thread: 350 Chevy With Under-hood Blower

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Tango,wanted me to post this thread.
Help him build his 350 with an "under the hood blower".
This is for his Monte.
350 4- bolt block.
#624 heads.
Pick out his rotating assemble,his camshaft,and blower carb and anything else it would need.

demons have a good selection of blower tuned carbs, how much boost? gonna be raced alot? etc details ?

This engine is a 1979 350 4 bolt from a truck . Its a clean low mile 350 . The #624 heads are Chevys thinest 350 castings . I am not going to use the #624 smog heads . So just the short block will be used . What Heads camshaft carb do you think would work the best . I was thinking of running the Weiand 144 blower . The car is a 1983 Monte Carlo that is gutted out 3400lbs or less. 2800 stall and a 373 gear .

I have a 750 dbl pump that was on my 471 blown sb for sale-I had 882 heads on it ran ok for the street.

Originally Posted by bigdude

I have a 750 dbl pump that was on my 471 blown sb for sale-I had 882 heads on it ran ok for the street.

I have a set of 882 full ported heads that some one spent a lot of time on . Do you guys think I will need to run head studs with this small blower . I am not sure what lbs of boost this 144 blower puts out . I dont think it will do more then 14lbs .

Originally Posted by tango

I have a set of 882 full ported heads that some one spent a lot of time on . Do you guys think I will need to run head studs with this small blower . I am not sure what lbs of boost this 144 blower puts out . I dont think it will do more then 14lbs .

There are to schools of thought.
One is under boost the A/F will get there no matter what with 6-8 lbs. of boost.
I have seen on the dyno with a 383, hyd. blower roller cam,8.5 to 1, with well ported double hump heads and a 6-71 blower.
This combo. went 518 hp.
The second idea is a great flowing head will really help the blower work easier.
Then we bolt on a set of 195 cc CNC ported heads from AFR.
The new combo. went 634 hp.

What about cam, what is the rule of thumb there... 383
I believe I read that the 144 will work with 10.5 cr pump gas, high test for sure

383 with a 5.7 rod is what i am doing now for some one with a 871 with the brodix -10 and a custom erson soild roller cam hope i get 450HP i have done the smaller blower engines used the BM cam the crower grind #00981 @.050 236/236 .506/.506 LS 114

Thank you all for the info . This will be a 350 for now . How much boost will the small B/M Weiand put out ?

Originally Posted by tango

Thank you all for the info . This will be a 350 for now . How much boost will the small B/M Weiand put out ?

you will get to a point were you will just make more heat and power will go down if you make any boost you will feel it. so do not get to boost happy

Originally Posted by pat mccarthy

you will get to a point were you will just make more heat and power will go down if you make any boost you will feel it. so do not get to boost happy

Boost happy!.......................... good one

What camshaft is good for a street blower . Do you need more duration and lobe separation ? I do not want to run more then 510 lift . And I want it to be a hydraulic flat tappet . I think the B/M 144 only puts out 10to12lbs of boost .

Originally Posted by tango

What camshaft is good for a street blower . Do you need more duration and lobe separation ? I do not want to run more then 510 lift . And I want it to be a hydraulic flat tappet . I think the B/M 144 only puts out 10to12lbs of boost .

the one i posted is good?