redvetracr
Well-known member
the only requirement is you have to run a factory type dual plane intake and it has to live in a road race car, anything else goes, is 750-775hp possible? I have an itch.
750hp from an all aluminum 427" BB
- Thread starter redvetracr
- Start date
69427
The Artist formerly known as Turbo84
With the exception of the intake manifold choice, that engine and horsepower range was used in Can-Am and possibly Greenwood's cars for a few years. Seems to me the biggest unknown is the flow ability (or limitation) of the "factory type" manifold.
Sounds interesting as hell. Please keep us updated if you pursue this.
Sounds interesting as hell. Please keep us updated if you pursue this.
big2bird
Charter Member, Founder Bird-Run, Cruise-In Bird-R
"Anything else goes." Can you blow it? If so, I bet you can get it.
Buy one of these, and add a paxton with a hat.http://www.gmpartsdirect.com/results.cfm?singlepart=1&partnumber=19166392
Last edited:
vette427sbc
Well-known member
Has to stay 427"?
Ive got a friend that ran an all aluminum 598" BBC... Made 1029HP N/A with a Lucas mech stack injection. Came out of his CanAm car. The extra cubes would help it live a little longer at that power level
Ive got a friend that ran an all aluminum 598" BBC... Made 1029HP N/A with a Lucas mech stack injection. Came out of his CanAm car. The extra cubes would help it live a little longer at that power level
Could the manifold be modified?
redvetracr
Well-known member
the rules here in the midwest are enforced subjectively by one person (who doesn`t much like me, imagine that!) but the legal limit of an all aluminum motor is 427" (plus an overbore). ask your friend if can we put a carb on it? and then put it in my vintage racer for a long weekend (I`ll pay for the intake, carb and distributor.....
redvetracr
Well-known member
yes it can
GT6Steve
Well-known member
RVR,
To reset the clock,
Are you saying that the RULES mandate a stock intake manifold as mentioned and you are working from beneath that RULE?
Once you have such a constraint the second guessing is done and the smart thinking comes to the fore. Hence your question?
To reset the clock,
Are you saying that the RULES mandate a stock intake manifold as mentioned and you are working from beneath that RULE?
Once you have such a constraint the second guessing is done and the smart thinking comes to the fore. Hence your question?
rtj
Well-known member
- Joined
- Nov 5, 2011
- Messages
- 3,182
http://www.sporttruck.com/techarticles/0410st_502_chevy_big_block_buildup_cylinder_heads/index.html
This article shows 700hp from a low compression 502. The CNC heads aren't cheap.
This article shows 700hp from a low compression 502. The CNC heads aren't cheap.
If you could modify the intake, you can pretty much do anything including making it basically a single plane, right? There must be some limitations.
Bullshark
Well-known member
Whew!! $26K is pretty steep for that ZL-1. Couldn't a clone be built alot cheaper?
I would be very interested in replacing the old school high compression iron block 427 with an all aluminum ZL-1 like clone if one was affordable. I would opt to keep the old Holley Commander FI intake and throttle body vs a carb though. My Holley Dominator ECU would be perfect for this application. I'm betting 750hp is not out of the question.
I would be very interested in replacing the old school high compression iron block 427 with an all aluminum ZL-1 like clone if one was affordable. I would opt to keep the old Holley Commander FI intake and throttle body vs a carb though. My Holley Dominator ECU would be perfect for this application. I'm betting 750hp is not out of the question.
turtlevette
The Turdle
Why not just put in an economical iron block 427 with aluminum heads and just go have fun?
redvetracr
Well-known member
69427
The Artist formerly known as Turbo84
Damn, what are they paying the guys to assemble those things? That thing seems about $10k overpriced to me.
Bullshark
Well-known member
Yeh that was originally my thought. Way back in the early 70's my brother and I took his 390hp 427 and put these high compression TRW forged pistons in it. Reworked the Iron heads for clearance and flow. Put a Crane Fireball cam in it with specs similar to the L-88 ( I can't remember the specifics) along with triple valve springs. Put a tarantula intake manifold along with the Holley 750 douple pumper. The one with the carb positioned at a 45 deg angle for equal flow. 4:11 rear end. I don't know how much hp that thing had but it would rap up to 6500 in a blink of an eye. He turned in the mid 10's with it before he cratered the rear end. That's the same engine in it now. Had to burn avgas or racing fuel and still do even with FI.
So, Thinking along the lines you just suggested, I thought about some aluminum heads cc's to lower the CR to ~10.1. Hydraulic roller FI cam along with ditching the 4:11 rear for the original 3:08 and go have fun.
All aluminum short block just sounds more bling:quote:
Howard, 40-$45k??? Whats that? and old L-88?
big2bird
Charter Member, Founder Bird-Run, Cruise-In Bird-R
Actually, with all the high rollers buying Guchi engines, I am surprised there are any available. "Only 427 to be made."
TimAT
Addict, Cruise-In Bird-Run 1 Veteran
The original ZL-1 was said to be in the 550-600 range when it was new and right out of the box. With the improvements in the level of technology today- roller cams and better heads, I'd have to think that 700 would not be a really big step.
Take a stock intake, cut the divider out of the center, stagger the jets to make up for the different runner lengths, and spin the wheel. I've got a tall open plenum intake for Ol' Red. Just can't decide if I want to go with that or the bling of the 2x4's.
Take a stock intake, cut the divider out of the center, stagger the jets to make up for the different runner lengths, and spin the wheel. I've got a tall open plenum intake for Ol' Red. Just can't decide if I want to go with that or the bling of the 2x4's.
69427
The Artist formerly known as Turbo84
Bling? We're talking functional aluminum, not chrome or carbon fiber overlays here.
Bullshark
Well-known member
True, but given the difference in the iron block vs aluminum and what I would use the car for, at this stage of my life, it would probably fall more in the "Bling" catagory. :waxer:
turtlevette
The Turdle
True, but given the difference in the iron block vs aluminum and what I would use the car for, at this stage of my life, it would probably fall more in the "Bling" catagory. :waxer:
A hundred pounds off the front end is going to make the car significantly more nimble......if you can afford it.
Not bling at all. I think everyone here is smart enought to know that. I was just suggesting that it's better to get out there and play if the iron block is all you can come up with. Going slower is better than sitting on the couch.
