Boost Comparo in this month's HotRod Mag

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You guys seen it yet? It starts on page 28. They use the exact same 327 CID carb'd SBF engine for all the tests: normally aspirated (no boost), centrifugal SC, turbo and 174ci Holley blower. Guess which combo makes the most torque and horsepower all across the RPM band...? :D

Buy it at your local magazine rack...! :!:
 
Hah, hows that for a letdown? Leads us all the way up and then boom, dropped like a hot potato.
 
Oh, come on now...spoil the story?

Hint: look at my signature line... :wink:
 
-------------------------Baseline------Centrifugal------Turbo--------Roots
Peak HP------------------392@6000------617@6000---------600@6000-----535@6000
Peak TQ------------------386@5200------561@5200---------617@4200-----513@4600
Min Boost---------------------------------1.7@2500------5.7@2500---------4.8@2500
Max Boost--------------------------------9.5@6000------9.5@5100---------8.0@6000
Ave HP(2500-6000rpm)-----310-------------412------------460---------394
Ave TQ(2500-6000rpm)-----365-------------494------------564---------483
Ave HP(4000-6000rpm)-----352-------------518------------555---------472
Ave TQ(4000-6000rpm)-----371-------------542------------585---------497

TQ@2500----------------------------------360------------490---------440
TQ@3000------------------340-------------405------------500---------450
TQ@3500------------------355-------------450------------560---------475
TQ@4000------------------365-------------500------------610---------500
TQ@4500------------------380-------------525------------610---------505
TQ@5000------------------375-------------555------------600---------505
TQ@5500------------------355-------------555------------560---------485
TQ@6000------------------354-------------540------------530---------475

HP@2500----------------------------------170------------235---------210
HP@3000------------------190-------------235------------290---------250
HP@3500------------------240-------------300------------375---------325
HP@4000------------------275-------------375------------455---------375
HP@4500------------------325-------------450------------525---------445
HP@5000------------------360-------------525------------575---------485
HP@5500------------------380-------------575------------600---------510
HP@6000------------------395-------------617------------600---------535

heh.. the roots is down 1.5lbs..

BW
 
This is why drag racers banned turbos...they always beat everything. Although a couple of superchargers makes it equal!

eh, Saturn5?
 
Good golly, Miss Molly...! :shock: 600 lbs/ft of torque at less than 4000 RPMs. Whew! I wonder what the 460 in my truck would get with a little boost at 2500 RPMs? It gets 370 lbs/ft normally aspirated at 2000 RPM now, but clearly needs more power on the hills. Gee, I have an extra Buick 231 turbo. I wonder what the engine could do with that strapped on there? :twisted:
 
XECUTE":1m7tgzf8 said:
This is why drag racers banned turbos...they always beat everything. Although a couple of superchargers makes it equal!

eh, Saturn5?
Click to expand...

Not sure if they make it equal... but they sure sound intimidating.. :twisted:

BW
 
I think they should have intercooled both of them, then run all the setups at 8-9 lbs. The turbo would have probably done even better!

I wanted to do a turbo on the Firebird, but there really isn't a simple (cheap OR cost-effective, take your pick) solution. Maybe the big-inch engine will get a turbo, but for now the Procharger will have to do.

If I can ever get this thing together...
 
54Ford":1vujn15r said:
Good golly, Miss Molly...! :shock: 600 lbs/ft of torque at less than 4000 RPMs. Whew! I wonder what the 460 in my truck would get with a little boost at 2500 RPMs? It gets 370 lbs/ft normally aspirated at 2000 RPM now, but clearly needs more power on the hills. Gee, I have an extra Buick 231 turbo. I wonder what the engine could do with that strapped on there? :twisted:
Click to expand...

Consider that recently in MM&FF Tiny Avenger Motorsports built a 412RWHP 2.3L turbo motor.

Thats a 140cid motor making 2.9428hp per cubic inch. AND that was with a basically stock motor running the stock crap head, a T3/T4 hybrid turbo, 29lbs of boost, Spearco intercooler and 96lb/hr injectors running off a stand alone EFI computer similar to a SDS or Megasquirt. And yes at 29lbs boost it was running racing gas. .

Multiply that amount by 200cid and...588hp.

a 302 would be...888hp

a 460ci motor and...1350hp. Not bad at all.

I lay awake at night and dream of the possibilities of Jacks Xflow 200 with a hybrid turbo pushing 20 lbs boost, a Volvo intercooler and 42lb/hr injectors. That should be able to push out well over 400hp.
 
29 lbs of boost and the stock crap head stayed bolted on the block?! I don't get it... When they race prep a lot of the engines in a lot of the Import magazines they only put like 15 - 18 psi into it... What's up with that?
 
The 2.3 Lima turbo engine is a VERY strong block. Considering that it weighs nearly as much as a 5.0 it ought to be. Wonder what they could have pulled with the "D" heads?
 
the 2.3L head is a brick...literaly flat on all sides.weighs as much as the block. the crank has huge journals in it and huge rods. if it had been a thin cating design they would nowhere near be able to produce the power they do. I think a xflow head with a turbo and efi would make some nice power in my car....


nick
 
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