This is topic Stock block hp rating? in forum Tech Talk at Northern California Ford Owners  .


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Posted by RyanM... (Member # 7089) on :
 
Anyone know how much HP a stock 1990 302 block can handle?
 

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Posted by 92stangLX (Member # 3252) on :
 
450-500 depending on the tune
 

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Posted by fasthatch (Member # 7277) on :
 
650 to 700 or so at the fly wheel
500 to 575 at the rear wheel but it will be on barrowed time
 

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Posted by Mean 5.0 (Member # 9822) on :
 
Fasthatch knows his shit, thats about what i hear, around 550-575 to the tires is the limit and you are on borrowed time, keep it around 450-500 to the tire for a stock block i would think...
 

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Posted by BlowN67 (Member # 4229) on :
 
If your balance is spot on your borrowed time is extended.
 

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Posted by fasthatch (Member # 7277) on :
 

quote:

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Originally posted by BlowN67:
If your balance is spot on your borrowed time is extended.

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yes it is how the ltd going john
 

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Posted by wilit (Member # 3367) on :
 
Here's a video link to a pull on Chris Hallbrook's dyno with the 347 Jay Allen built and assembled. Engine did pretty darn well considering the parts Jay limited himself to using in order to prove a point. DO NOT try this at home with your Mexican block!!!

YouTube - Camshaft Innovations 347 Engine Dyno

Basic combo:
[LIST]
[*]Pro Systems Dominator Carburetor
[*]Wilson Manifolds / BG Modified Victor Jr
[*]TEA / [COLOR=green]Ci[/COLOR] Prepped TFS TW 190cc Fast As Cast Heads
[*]Competition Bowl Blend
[*]Milled to 58cc
[*]Comp Cams Ultra Gold 7/16 x 1.72 Roller Rockers
[*][COLOR=green]Ci[/COLOR] Solid Roller Camshaft on a Billet Core
[*]Comp Cams 838-16 Solid Roller Lifters
[*]Comp Cams 8138 100% Adjustable Timing Kit
[*]Probe TFS TW 1.090" F/T Pistons
[*]10.68:1 Compression @ zero deck & 58cc chamber
[*]Scat 5.400" x 2.123" H-Beam Rods
[*]3.400" Steel CHP/Eagle Crankshaft
[*]ATI Dampner
[*]RAM Aluminum Wheel
[*]Canton Pan
[*]Probe Steel Main Girdle
[*]ARP Main Studs
[*]ARP 7/16 Head Studs
[*]2.00" Accufab Headers with 4.00" collector
[*]5.00" oval NASCAR Exhaust
[*]5.00" oval Custom Mufflers
[*]Michigan 77 Bearings through out
[*]GZ vacuum Pump (after rings seat)
[*]Royal Purple Oil
[*]Mexican 302 Block

[ March 05, 2010, 07:37 PM: Message edited by: wilit ]
 

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Posted by RyanM... (Member # 7089) on :
 
good info keep it comin
 

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Posted by street_illegal_stang (Member # 1554) on :
 

quote:

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Originally posted by RyanM...:
Anyone know how much HP a stock 1990 302 block can handle?

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1.21 gigawatts

[ March 05, 2010, 08:49 PM: Message edited by: street_illegal_stang ]
 

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Posted by SmokinLX (Member # 1684) on :
 
450-600 rwhp depending on tune, luck, good harmonic balncer, adequate fuel delivery, good cooling system "aluminum raiator" and driving style. Also have to consider power adder used to accomplish rwhp number's, supercharging reqires more power to reach higher rwhp #'s because it uses power to spin the belt for the supercharger "I have heard 50 or more HP & more at full boogie " as compared to turbo's which utilize expened exhaust gases to spool up and nitrous which obviously does'nt require any additional power. For longest life expectancy stay around 500 rwhp get a good tune & balancer & intercool boost "to reduce detonation" and don't drive hard all the time oh and cross Your finger's cause it can blow up while getting the initial tune or hold up for year's!
 

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Posted by phildog (Member # 1214) on :
 
It's not like stock blocks have a horsepower sensor!

People have blown up bone stock motors. I have heard of more than one road race engine that gave up at around 300 flywheel horsepower. The thing is, it costs the same to machine a stock block as it does a good aftermarket block. The rotating assembly doesn't care what it is dropped into, and it takes the same amount of labor to build a ticking time bomb(stock block) as it does a real block (Dart, etc.)

As stated before, machine work, balancing, part quality, cooling, block quality(core shift), tuning and driving are all factors that contribute to the longevity of a block. As I see it, if you can really afford to build a 500hp plus car, then you can afford a 2k block.
 

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Posted by Camara90 (Member # 134) on :
 
I agree, I have seen it from every horsepower level. But they say at around 500rwhp the lifter galley is the weakest point, and like to split. Machining that Dart block is a lot more expensive though.

quote:

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Originally posted by phildog:
It's not like stock blocks have a horsepower sensor!

People have blown up bone stock motors. I have heard of more than one road race engine that gave up at around 300 flywheel horsepower. The thing is, it costs the same to machine a stock block as it does a good aftermarket block. The rotating assembly doesn't care what it is dropped into, and it takes the same amount of labor to build a ticking time bomb(stock block) as it does a real block (Dart, etc.)

As stated before, machine work, balancing, part quality, cooling, block quality(core shift), tuning and driving are all factors that contribute to the longevity of a block. As I see it, if you can really afford to build a 500hp plus car, then you can afford a 2k block.

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quote:

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Originally posted by phildog:
Why is a Dart block more expensive to machine???

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lol.. it cost me the same to machine my dart block, as it has to do a friends stock block..

the price is due to the kind of work you do to the motor..
 

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Posted by white1990stang (Member # 2307) on :
 
i was running around 550 on a stock block with no problems. had a very good balancer. car ran perfect with no problems. also was revving to 6500.
 

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Posted by phildog (Member # 1214) on :
 
That was what I thought, warhorse, same processes, better base material. Interested to know why camara claims it's more...
 

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Posted by Camara90 (Member # 134) on :
 
Ok I guess you cant really say a lot more for machine work. I am not an expert, because I have not built a Dart block myself. My understanding is that generally the lifter bores are very tight and require extra clearancing, as well as modification for roller lifters. I have heard machine shops quote anywhere from $500-$1100 for the work, and they are the best out of the box aftermarket block. So some big gaps there, depending how the block is prior to machine work. You still got balancing on top of that price. I have been in his shoes before and been worying about splitting a stock block, just do it right the first time and get a Dart I wouldnt even think twice about the Dart if the motor already needed a rebuild. But there are also other costs to consider as well like a new oil pan for the 4 bolt main. But hey gotta pay to play
 

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Posted by turbo50 (Member # 6700) on :
 
If you are worried about making enough hp to split the stock block then it makes way more sense to spend a few thousand more and upgrade. Well worth it IMO.
 

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Posted by RyanM... (Member # 7089) on :
 

quote:

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Originally posted by turbo50:
If you are worried about making enough hp to split the stock block then it makes way more sense to spend a few thousand more and upgrade. Well worth it IMO.

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quote:

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Originally posted by RyanM...:
ANY FEEDBACK ON THE DART SHP VS THE BOSS BLOCK?

I think they are around the same price.

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