sleepybu

whats the fastest you've gone with either of these blowers and what was your combo


thanks

Damon

My expereince with them is limited. That expereince tells me that a little 142/144 is "all done" at around 500 flywheel HP. The larger 177 is maxed out around 600.

My current combo is a 383 with AFR 190 heads at 8.7:1 compression, Comp XE 268 cam ground on a more blower-friendly 114* LSA with a stock HEI distributor fortified with vitamin MSD, 26* total timing and a home-tweaked 800 CFM Qjet carb. A conservative tune- fat and with very little total advance. I don't like to play on the bleeding edge.

From what I've run against on the street I'd say it runs about 12.5 @ 115 or so in my 3500 lb Malibu on street tires. Stock stall converter in the TH-350 trans and 2.92 rear gears. Not exactly drag-race stuff. I would estimate I make a LEGIT 450 at the crank, but with WAY more torque than any N/A small block at a similar HP level.

Smacking around near-stock LS-1s is easy, even giving them a full length out of the hole due to my bad traction. By 60 MPH I just RUN past them.

It's very streetable. Idles all day at 700 in gear, never overheats, even pulls down decent mileage. I built the car as a tribute to my Grandmother who gave the car to me when she passed away a few years ago. I always wanted it to be mild enough that she could have driven it to the grocery store, but with a little more punch than the stock 110HP 305 had.

Next summer it's getting the bottle. Nothing fancy- simple 125HP plate system sandwiched between the carb and blower.

sleepybu

Thats one tame tire fryn combo

CHP got 545hp @6500 & 535tq @4500 with a B&M 144 on a 8.8 to 1 355, afr 195 heads, isky hydro roller 235/245 @.050, 114LS,, 850dp, 6" rods, 1-3/4 headers...

Damon

I jsut dyno'ed my combo today. Go check out my post in this forum about it. I was pretty much dead-on with my estimates.

People say I'm conservative. I say I'm realistic. Unless you've got a motor that is already making over 450 N/A you ain't getting over 500 with a little 142/144 blower. It jsut can't flow the air.

Proof is in the pudding. Forget what magazines say. They are not real-world. That "550HP motor" ain't layin' down anywhere within 100 HP of that number to the rollers installed in a car.

sleepybu

so your saying i'll gain very little on this combo...

406
9.4 to 1
ported 23degree tfs heads
xe294h cam (i know it's not realy a blower cam)
6" rod
1-3/4 headers, full 3" mandral bent exhaust

I'm trying to pry a 142 out my friends hand...

So you figger i'd be better off with just under 11 to 1 and run a edelbrock street tunnel ram

to bad you couldn't a real pull on the dyno...but them #s look good for how tame it is

thanks for the input:rockon:

Damon

That's basically what I'm saying. With the big cubes and big cam you won't be able to make any meaningful boost, even with the highest pulley set available. The blower jsut can't move enough air to build meaningful boost. The larger 177 would be a much better choice for that combo in my opinion.

My combo is a 383 (less cubes) with a much smaller 268XE cam (224/230) that IS for a blower- it's got a wider 114* LSA. I am currently only one set of pulleys away from being "maxed out" and I'm only seeing 5 PSI. My current drive ratio is 2.28:1. The next set of pulleys up is 2.45:1 and that's all she wrote. Those pulleys should get me maybe 6.5 PSI.

You might check to see if the Holley 144 has any higher pulley sets available than the Weiand 142- it's a slightly newer design and might have more "headroom" left on the pulley sets than the 142.

sleepybu

are you useing the 6" or 7" sc crank pulley

Damon

The 7".

Randel '86

Just slap a 14-71 on, and be done with it