which engine, procharged 454, 502, 0r 540 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

marc70chevy · 07-16-2009, 12:40 AM

Ok, this is what i want. The most RELIABLE and somewhat inexpensive (in that order) way to get about 700-750 crank horsepower and about the same amount of torque. I plan on using this engine mostly for racing, but will still get driven on the street quite often to cruises and meets. Here are 4 options i have came up with; low compression 454, forged internals and a procharger. low compression 502 with forged internals and a procharger. high compression high revving 502. and lastly high compression high revving 540.

with the procharged set-ups i am going with meth injection as well so i can get more boost and a higher compression ration without detonation.

so i would really appreciate any advice from all of yall with much more experience than me (most of the people on here)

mongoose · 07-16-2009, 02:06 AM

any big block with a prochager will net you 700... on pump gas..

Ont67shortbox · 07-16-2009, 08:50 AM

High compression means race gas,or timing pulled so far back,performance suffers.You can't beat cubic inches,how about a low compression 540 with a pro charger.

marc70chevy · 07-16-2009, 02:11 PM

well when i say high compression i'm talking about 11:1 so if i went with aluminum heads then it should be ok with 93 octane

marc70chevy · 07-16-2009, 02:13 PM

and a procharged 540 is out of my budget

Super73 · 07-16-2009, 03:12 PM

If you debating on the 454 or 502 both procharged, go with the 502 and gear it/stall it apropiatly.

Wild83C10 · 07-16-2009, 07:41 PM

Quote:

Originally Posted by Super73

If you debating on the 454 or 502 both procharged, go with the 502 and gear it/stall it apropiatly.

Agree, not much of a price difference between the two and another 48 ci.

A procharged motor if built and tuned properly can be more streetable since you don't have to run big everything to get the same horse power. Also consider a methenal injection system. You can run more boost on pump gas.

tomtuna1978 · 07-17-2009, 01:30 AM

why not just get a 572/720 hp crate motor? its got a warranty, its reliable, and its got your 700hp. and you are gonna spent that much with a pro charger anyway !

mongoose · 07-17-2009, 01:33 AM

Quote:

Originally Posted by Wild83C10

Agree, not much of a price difference between the two and another 48 ci.

A procharged motor if built and tuned properly can be more streetable since you don't have to run big everything to get the same horse power. Also consider a methenal injection system. You can run more boost on pump gas.

and say hello to 4 digit power numbers!!!!!!!

BossHogg69 · 07-17-2009, 09:51 AM

just a thought here, but a GM ZZ502 shortblock (all forged guts, w/ 7/16 rods) gets 8.75:1 with a 118cc head. Add to that a set of CNC'd AFR 315cc heads (flows nearly 400cfm, but moderate runner size for BIG torque) with a 121cc chamber (will net about 8.5:1 on the ZZ502 shortblock with a .041" head gasket) and whatever Procharger you've already decided on. You'll probably want a custom cam to go with the blower/boost you decide to run, but this seems like pretty easy way to get 800hp/800lb-ft and not break a sweat.

bigsnookmaster · 07-17-2009, 06:09 PM

Quote:

Originally Posted by tomtuna1978

why not just get a 572/720 hp crate motor? its got a warranty, its reliable, and its got your 700hp. and you are gonna spent that much with a pro charger anyway !

12.5 to 1 compression. Forget about pump gas! They recommend race gas for these engines.

ripdog28 · 07-17-2009, 11:36 PM

Some of the post look a bit off or i am misreading them. If you put a pro charger on anything, the block and heads eng should be under 9.0-1, preferably 8.5-1 compression. With the charger you will be pushing the 93 octane limits. If the engine alone is over 9.5-1/10.0-1 you will not run 93.

I personally like Bosshogg idea. have seen a shortblock 502 with AFR 305 stock(no cnc work) push 620hp with just a .550 lift cam. so add a pro charger and your talking 800+ easily.

tomtuna1978 · 07-17-2009, 11:52 PM

easy answer !!! ... e85 !

Wild83C10 · 07-18-2009, 07:48 AM

Quote:

Originally Posted by ripdog28

Some of the post look a bit off or i am misreading them. If you put a pro charger on anything, the block and heads eng should be under 9.0-1, preferably 8.5-1 compression. With the charger you will be pushing the 93 octane limits. If the engine alone is over 9.5-1/10.0-1 you will not run 93.

You can run a supercharger with 9.5:1 compression, just have to keep the boost lower. 5-6 psi? The compression ratio depends on what you want from the motor.

I believe there is more potential from a procharged BB. You can have a milder street motor and the procharger will provide all the power you want. Yes it will probably be a bit more expensive, but you will have more potential as well. You start with 700hp, then a year or two later you want more, add an intercooler run more boost, the potential goes on.

Alex1 · 07-18-2009, 09:08 AM

What procharger head unit? The Vortech YSI (much cheaper and more reliable) on a 496 or so with a decent solid roller with less than 10psi will get you 900+ which means no more stock driveshaft, tranny or diff plus chassis and suspension modifications.

If you ONLY want 750hp then build a naturally aspirated egine - a cheap 496ci with worked over factory heads and a solid roller can get you that.

07-16-2009, 12:40 AM	#1
marc70chevy Registered User Join Date: Jun 2009 Location: League City, Texas Posts: 82	which engine, procharged 454, 502, 0r 540 Ok, this is what i want. The most RELIABLE and somewhat inexpensive (in that order) way to get about 700-750 crank horsepower and about the same amount of torque. I plan on using this engine mostly for racing, but will still get driven on the street quite often to cruises and meets. Here are 4 options i have came up with; low compression 454, forged internals and a procharger. low compression 502 with forged internals and a procharger. high compression high revving 502. and lastly high compression high revving 540. with the procharged set-ups i am going with meth injection as well so i can get more boost and a higher compression ration without detonation. so i would really appreciate any advice from all of yall with much more experience than me (most of the people on here) __________________ http://www.cardomain.com/ride/3327115

07-16-2009, 02:06 AM	#2
mongoose Registered User Join Date: Feb 2009 Location: slurrey, bc. Posts: 1,134	Re: which engine, procharged 454, 502, 0r 540 any big block with a prochager will net you 700... on pump gas.. __________________ -'73 c/10 - Low with Go - will be complete... probably never. -'90 2wd Blazer - well... soon enough anyways. -'84 SWB - the daily gas guzzler.

07-16-2009, 08:50 AM	#3
Ont67shortbox Registered User Join Date: May 2003 Location: Ontario Posts: 279	Re: which engine, procharged 454, 502, 0r 540 High compression means race gas,or timing pulled so far back,performance suffers.You can't beat cubic inches,how about a low compression 540 with a pro charger. Last edited by Ont67shortbox; 07-16-2009 at 08:51 AM.

07-16-2009, 02:11 PM	#4
marc70chevy Registered User Join Date: Jun 2009 Location: League City, Texas Posts: 82	Re: which engine, procharged 454, 502, 0r 540 well when i say high compression i'm talking about 11:1 so if i went with aluminum heads then it should be ok with 93 octane __________________ http://www.cardomain.com/ride/3327115

07-16-2009, 02:13 PM	#5
marc70chevy Registered User Join Date: Jun 2009 Location: League City, Texas Posts: 82	Re: which engine, procharged 454, 502, 0r 540 and a procharged 540 is out of my budget __________________ http://www.cardomain.com/ride/3327115

07-16-2009, 03:12 PM	#6
Super73 Registered User Join Date: Nov 2007 Location: Bay Area, Ca Posts: 2,841	Re: which engine, procharged 454, 502, 0r 540 If you debating on the 454 or 502 both procharged, go with the 502 and gear it/stall it apropiatly. __________________ ------Motor---------------Bottle 60'---1.53---------------1.41 1/8---6.58 @ 105.92----5.87 @ 118.41 1/4---10.38 @ 126.97----9.24 @ 142.49

07-17-2009, 01:30 AM	#8
tomtuna1978 Registered User Join Date: Apr 2009 Location: Bend,Oregon Posts: 225	Re: which engine, procharged 454, 502, 0r 540 why not just get a 572/720 hp crate motor? its got a warranty, its reliable, and its got your 700hp. and you are gonna spent that much with a pro charger anyway !

07-17-2009, 09:51 AM	#10
BossHogg69 motor exploder Join Date: Mar 2009 Location: Pittsburgh, PA Posts: 2,346	Re: which engine, procharged 454, 502, 0r 540 just a thought here, but a GM ZZ502 shortblock (all forged guts, w/ 7/16 rods) gets 8.75:1 with a 118cc head. Add to that a set of CNC'd AFR 315cc heads (flows nearly 400cfm, but moderate runner size for BIG torque) with a 121cc chamber (will net about 8.5:1 on the ZZ502 shortblock with a .041" head gasket) and whatever Procharger you've already decided on. You'll probably want a custom cam to go with the blower/boost you decide to run, but this seems like pretty easy way to get 800hp/800lb-ft and not break a sweat. __________________ Adam 1969 Chevy CST/10 stepside, DART Big M/TREMEC Magnum Extreme/3.73's w/Detroit Truetrac 1965 Chevy Bel Air Wagon (daily driver), 327/TH350,10 bolt w/3.08's 1961 Chevy Bel Air Sport Coupe, ZZ454/M21/9" rear w/3.50's & Detroit Truetrac 2005 GMC 1500 ccsb 2wd, 6.0L/4L65e/3.73 G80 2006 GMC 2500HD ccsb 4x4, DMax LBZ/Allison 6spd/4.56's w/Detroit TrueTrac Use the SEARCH function on this forum - it is your friend!!

07-17-2009, 11:36 PM	#12
ripdog28 Registered User Join Date: Apr 2008 Location: Imperial Beach, CA Posts: 1,040	Re: which engine, procharged 454, 502, 0r 540 Some of the post look a bit off or i am misreading them. If you put a pro charger on anything, the block and heads eng should be under 9.0-1, preferably 8.5-1 compression. With the charger you will be pushing the 93 octane limits. If the engine alone is over 9.5-1/10.0-1 you will not run 93. I personally like Bosshogg idea. have seen a shortblock 502 with AFR 305 stock(no cnc work) push 620hp with just a .550 lift cam. so add a pro charger and your talking 800+ easily. __________________ 69 c-10 BBC 462ci, forged crank, H-beam rods, 10.5-1 KB forged pistons, Dart Iron Eagle 308cc, Straub Cam, Comp Cams chrome moly full rollers, Weiand Team G, Prosystems 950, TH400/3500 Dalenzie stall, Currie 9+ Detroit Locker w/31spline axles.3.5/6in drop. My Build.

07-17-2009, 11:52 PM	#13
tomtuna1978 Registered User Join Date: Apr 2009 Location: Bend,Oregon Posts: 225	Re: which engine, procharged 454, 502, 0r 540 easy answer !!! ... e85 !

07-18-2009, 09:08 AM	#15
Alex1 Registered User Join Date: Jul 2007 Location: Ottawa Ontario Canada Posts: 1,156	Re: which engine, procharged 454, 502, 0r 540 What procharger head unit? The Vortech YSI (much cheaper and more reliable) on a 496 or so with a decent solid roller with less than 10psi will get you 900+ which means no more stock driveshaft, tranny or diff plus chassis and suspension modifications. If you ONLY want 750hp then build a naturally aspirated egine - a cheap 496ci with worked over factory heads and a solid roller can get you that.



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