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The "recipe" to 500 rwhp with heads and cam.

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Old 07-04-2007, 08:49 PM
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Originally Posted by Specialized
Patrick, I see you no longer have a stock rotating assembly. Can you shed some light/give some insight on whether this (high compression) can be done on a stock shortblock with success? Not everyone looking to make 500/looking for a high hp reliable combo can justify building a forged bottom end only to run a totally n/a setup.


My true question being: How likely is it that a shortblock with good compression (all cylinders within 1.5% of each other), and higher mileage (mine has 80k on it) make similar power to a forged rotating assembly (which presumably is actually a bit heavier, but you're adding significant strength to it)? Hell- would a stock assembly with notched pistons to account for the added lift cam/milled heads make **dare I say** more power?
Hey patrick, this is a good question, I have a stock rotating assembly and I'd like to do what you are doing in the semi-near future. I don't have as many miles as this guy (I have 21k on an 01 SS) but i'd like to do something along your lines. How much do you reccomend safely reving a stock bottom end to? I see that you were getting close to 7k but i know you don't have a stock bottom end. Any input from you would be greatly appreciated!
Old 07-04-2007, 09:35 PM
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so is there any way that i can get these kind of numbers with a a4????
Old 07-04-2007, 09:38 PM
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so is there any way that i can see these numbers with an a4 ???? with or with out a stall???
Old 07-05-2007, 02:08 PM
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They should make a Pat G crate engine.
Old 07-05-2007, 02:58 PM
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awesome thread...great great info, vote for sticky.

Chad
Old 07-06-2007, 04:43 AM
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Old 07-06-2007, 07:07 PM
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So how much compression (and power) could he have ran if he went with e85? It is pump gas after all
Old 07-06-2007, 07:54 PM
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Thanks for the write-up Patrick! I will be studying this for days!
Old 07-07-2007, 01:06 AM
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Originally Posted by Sharpe


They should make a Pat G crate engine.

As long as it isn't mated to a M6.

Just kidding. I got this thread bookmarked.
Old 07-07-2007, 04:47 PM
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Patrick, why do you like those headers over others? Why not 1 7/8"? you should fab up some of those "Y" pipes and sell them
Old 07-07-2007, 07:03 PM
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What do you think this combo would make on a mustang dyno?
Old 07-09-2007, 12:52 AM
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Originally Posted by Asmodeus
What do you think this combo would make on a mustang dyno?
around 440rwhp

Originally Posted by Mia
you should fab up some of those "Y" pipes and sell them
I will probably be building another one soon.
Old 07-09-2007, 02:51 PM
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Originally Posted by gooch06
so is there any way that i can see these numbers with an a4 ???? with or with out a stall???
No. An A4 will not break 500 with that combo if an M6 barely did.

Originally Posted by 98Aggie
around 440rwhp
you think he would lose 60hp moving to a mustang dyno from a dynojet? I know dynojet's are very "friendly" dyno's, but you think they really read 60hp high?
Old 07-09-2007, 04:33 PM
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Originally Posted by Asmodeus
No. An A4 will not break 500 with that combo if an M6 barely did.



you think he would lose 60hp moving to a mustang dyno from a dynojet? I know dynojet's are very "friendly" dyno's, but you think they really read 60hp high?
Mustang dynos vary more than dynojets because their software allows you to enter so much more vehicle data. As a result, some are stingy (like 98Aggie's dyno) and some read numbers close to dynojet numbers. On 98Aggie's Mustang dyno, we got 440 rwhp. On the dynojet is was worth 508. This 440 number was a nice jump from when we had 412 Mustang rwhp with the old heads/cam setup. That particular setup was worth 475 rwhp on a Dynojet.
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2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
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Old 07-09-2007, 07:08 PM
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Patrick,any idea how much power I should expect out of that 383 you cam'd for me?
The cam in question was 236/242 .615/.612 111+2 XFI.
Mod list below.
I have a bad clutch & couldn't do any WOT tuning..Just part throttle/driveability/idle stuff....But man does that motor run GOOD from what I can see.
Torque everywhere.
The last step will be a ported FAST
Old 07-09-2007, 10:02 PM
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Originally Posted by BYE RICE
Patrick,any idea how much power I should expect out of that 383 you cam'd for me?
The cam in question was 236/242 .615/.612 111+2 XFI.
Mod list below.
I have a bad clutch & couldn't do any WOT tuning..Just part throttle/driveability/idle stuff....But man does that motor run GOOD from what I can see.
Torque everywhere.
The last step will be a ported FAST
You have that 12 bolt that's going to reduce your rwhp some but I would be floored if you didn't make in the 480-490 range with 475-480 in rwtq. You could even exceed 500 rwhp if the heads are exceptional. Add an electric water pump, some Yella Terra rockers and bump your compression to 12.0:1 and you'd add even more power. Can't wait to see your results.
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2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
LS1,LS2,LS3,LS7,LT1 Custom Camshaft Specialist For custom camshaft help press here.
Custom LSX tuning in person or via email press here.
Old 07-09-2007, 10:42 PM
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Patrick....havent posted in a while and i LOVE this tread..*my vote for sticky* but do you have a heads/cam package for sale to get that magic 500 na number? and how much does a properly ported FAST 90 intake run? the guy who ports them...any idea what he charges? and or will you be listing a specific part by number Recipe for this build? thanks in advance...
Old 07-10-2007, 12:36 AM
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There is no 500rwhp H/C package.

It is the whole motor package, from bolt ons to internal.
Old 07-10-2007, 07:41 AM
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Originally Posted by PREDATOR-Z
There is no 500rwhp H/C package.

It is the whole motor package, from bolt ons to internal.
I can't agree more...

It takes a lot of attention to the details and peripherals to reach the 500RWHP barrier with a 346Ci...with a complete reliability of course!!!

Christian
Old 07-10-2007, 10:07 AM
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The key to 500 RWHP from a 5.7 is Tony Mamo porting your AFR 205's & FAST intake,& Patrick G setting up your cam numbers, finding as much "free HP" as possible,good exhaust design,& having a really well-built shortblock(not a 100k mile stocker)..& putting it through an M6 & a stock geared 10 bolt.
You're probably not going to get there just by bolting up off-the shelf cams & heads & have it be as streetable as Patricks car appears to be.
I found it fascinating how so much attention was paid to flame quench with the head set up & how this allowed such high SCR to still use pump gas..That was good stuff.

Last edited by BYE RICE; 07-10-2007 at 04:41 PM.


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