Sensible BHP / boost limit for 1988 roller cam block - Ford Mustang Forums : Corral.net Mustang Forum
 
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post #1 of 16 Old 08-24-2012, 07:07 PM Thread Starter
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Sensible BHP / boost limit for 1988 roller cam block

Hi guys, newbie from the UK with some questions if you don't mind ?

I have a 1988 Thunderbird roller cam 5.0 block

Scat 3.25" cast stroker crank

Scat 5.4" steel rods

Edelbrock performer RPM heads with 1.94" inlet valves

Edelbrock performer RPM 2 intake manifold.

I have already bought a set of Icon forged 10:1 pistons that will almost certainly have to be sold on if I go with a turbocharger.

Not bought a camshaft yet.

My question is what is the maximum reliable boost/horsepower limit of my block if I was to swap to 8.5:1 forged pistons and not rev over 6000 rpm ?

Also what make/size single turbo would you recommend to do the job ?

I don't have enough cash for a dart block...

Sorry if these are dumb questions

Thanks in advance

Mark

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post #2 of 16 Old 08-24-2012, 08:19 PM
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500 to the tires. I would be skeptical pushing it any higher than that or spinning it much past 5500 with a stock block. They're prone to cracking from the main journals to the valley with much more than that. Also with a stroker it will probably put up with a little less.


I'm not a magazine racer, my car is actually fast.
I also have a Honda civic but, mine has a bigger, uglier driver.

Last edited by nasty92lx; 08-24-2012 at 08:25 PM.
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post #3 of 16 Old 08-25-2012, 02:54 AM
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Note he said to the wheels, you do 500 bhp on a stock block I want video. Cuz it will fly, bust or fly and bust
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post #4 of 16 Old 08-25-2012, 03:12 AM Thread Starter
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Thanks for the info.

Looks like I'll be leaving it naturally aspirated unless I can scrape up the cash for a decent cylinder block
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post #5 of 16 Old 08-25-2012, 03:19 AM
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Could always step up to a 351w block.

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post #6 of 16 Old 08-25-2012, 07:33 AM
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6000rpm and 10-12 psi is fine!

Dynoed 507 to the wheels with my stock block...
Drove the car for 1 years, no problem!

Here is some vids...


DART 331, AFR185 COMP, S400SX3 80MM BILLET FMW
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post #7 of 16 Old 08-26-2012, 01:30 AM
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Swagger, rethink what you said. BHP is crank. If you make 500 at the wheels, you're making more at the crank.
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post #8 of 16 Old 08-26-2012, 02:41 AM
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500rwhp is safe all day. I went up to 461rwhp through an aod with my stock block. Lived for years before i got an aftermarket

TWIN TURBO!! Because bottles are for babies and superchargers blow
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post #9 of 16 Old 08-26-2012, 03:53 AM Thread Starter
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If it made around 450bhp at the crank and I did not rev it over 6000 would it stand a chance of staying in one piece with the 3.25 inch stroke?

I'm guessing that the engine would make an easy 300bhp at the crank without a turbo so 8lbs of boost would be about right ?

Any suggestions for a single turbo suitable ?

Are main cap girdles worth using ?

Car is a Ford Sierra (Merkur) 5 door hatchback weighing around 2800lbs

T56 from modular V8 Mustang

3.62:1 Diff ratio

Thanks for your patience
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post #10 of 16 Old 08-26-2012, 09:10 AM
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Any 62-70 mm turbo. According to some the girdles are snake oil, they don't work. Others say they are what keeps their combination together. Get a hold of Woody he will set you straight on the girdle question.


I'm not a magazine racer, my car is actually fast.
I also have a Honda civic but, mine has a bigger, uglier driver.
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post #11 of 16 Old 08-26-2012, 06:53 PM
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Quote:
Originally Posted by wytwolf View Post
Swagger, rethink what you said. BHP is crank. If you make 500 at the wheels, you're making more at the crank.
Yep, You are right my friend. I was just reading earlier that day how someone breaking stuff confusing the two, then threw it out there with out marinating what was posted
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post #12 of 16 Old 08-27-2012, 04:08 PM
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Just curious. The RWHP dyno numbers we're talking here, Are we talking corrected or uncorrected?

1989 5.0 T5 LX Hatch - Explorer Short Block with an FMS F-303 cam, TFS TW170 heads, Tmoss Ported Cobra Intake, an On3 Turbo Kit with a 67mm Ceramic Ball Bearing Turbo, and backed by a T56 Magnum 6spd with 3.55's
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post #13 of 16 Old 09-12-2012, 12:29 PM
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post #14 of 16 Old 09-12-2012, 12:48 PM
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Quote:
Originally Posted by bumblebee View Post
6000rpm and 10-12 psi is fine!

Dynoed 507 to the wheels with my stock block...
Drove the car for 1 years, no problem!

Here is some vids...

Jeez, that thing seems to pull really hard up top for 507 rwhp, what kinda torque does it make?
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post #15 of 16 Old 09-17-2012, 04:03 PM
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Quote:
Originally Posted by justinschmidt1 View Post
Jeez, that thing seems to pull really hard up top for 507 rwhp, what kinda torque does it make?
730 rwnm
or in your language
538.35 ft lbs

DART 331, AFR185 COMP, S400SX3 80MM BILLET FMW
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post #16 of 16 Old 09-17-2012, 06:25 PM
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I'll throw my hat in here... As far as how much power I'm making, not sure. I'm pretty sure im over the 500fwhp mark though. Mine has a DSS short block with the main support that everyone says does nothing, it's 306", 8.5:1 comp, has a comp XE266HR cam, 185 cnc ported trick flows and a tfs track heat intake. I run a procharger P1SC-2 at [email protected] 11.5:1 air fuel and 20deg timing up top and it gets beat on regularly, probably has 10,000KM on the combo now and hasn't missed a beat. I do have meth injection as well (shooting 600CCs of blue washer fluid) and it lives on a steady diet of ####ty canadian 91 octane.

89' coupe - Dart 427, twin 70s, glide and AC. Street car.

89' Hatch - DSS 306, Procharger, viper T-56.
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