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Old 04-29-2015, 08:52 PM   #1
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HP estimate???

I know these questions are so subjective but I will ask anyway. I am building the following car and want an idea of HP ballpark so I know what clutch , etc. to go with.

1997 GT
MMR 4.75 stroker longblock (750se)
Twisted wedge 185 heads
stage 3 MMR cams (turbo cams for future use)
stock pi intake
BBK 78mm throttle body/intake plenum
39 lb cobra injectors
BBK shorty headers
BBK offroad X pipe
flowmaster 44s
K&N CAI
will have SCT tuner and professional tune

I am just trying to figure if this is mid 300, high 300 or more?? I still need to pick a clutch and considering this is a daily driver don't want it crazy aggressive.

Thanks in advance
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Old 04-29-2015, 08:53 PM   #2
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ohh yeah....

also having the trans rebuilt by thet45source.com to handle all the potential new power
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Old 04-29-2015, 09:32 PM   #3
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You'll make more power than this with a stock motor and a supercharger. And spend less, and get better mileage...

But to answer your question I'd say in the mid 300 mark at best with the non-optimal cams and the shorties. The modular NEEDS a power adder, end of story. I know you plan on a blower later but I'd buy the blower first for the stock motor and enjoy 400hp while you build the "built" motor on the side. Or just swap in a Coyote.
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Old 04-29-2015, 09:40 PM   #4
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Instead of doing the MMR longblock..... I would personally go with a Boss Block and big bore stroker kit. That'll push you out to 5.3L. If anything happens to the engine even if it is clearly their fault you are essentially SOL. I would go somewhere else......

And for the price of all that i would just throw in a coyote, make more power and call it a day.
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Old 04-29-2015, 09:56 PM   #5
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For every MMR horror story there are like 20 happy customers... But the fact that there ARE so many horror stories... you never hear about pissed customers from Fordstrokers. Although Woody just does pushrods AFIAK.
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Old 04-29-2015, 10:03 PM   #6
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There are good MMR builds out there... Brett Madsen with the beastly Roush got his shortblock from them, and its been taking the abuse like a champ. What i want though is the 344ci coyote shortblock JPC is putting out. They give you compression ratio options all the way up to 16.0:1.... Imagine that. a 344ci coyote with 16.0:1 cpr. No doubt it could hit 650-700rwhp NA
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Old 04-29-2015, 10:06 PM   #7
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Lol, have fun running alcohol on the streets.
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Old 04-29-2015, 10:06 PM   #8
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^ yes that dam thing is $15,000 for a dam shortblock though.

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Old 04-29-2015, 10:18 PM   #9
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^ yes that dam thing is $15,000 for a dam shortblock though.

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Yea only reason I probably wouldn't get one lmao.


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Old 04-29-2015, 10:22 PM   #10
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old motor knock

Well the original motor had 180000+ and had a very loud knock. We had to start somewhere. The plan is to add a turbo down the road. I doubt you can find an engine builder that does any volume that doesn't have pissed off customers. I did a lot of looking around and seems that most of the MMR horror stories are older. Let's hope so.
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Old 04-30-2015, 03:12 PM   #11
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You'll make more power than this with a stock motor and a supercharger. And spend less, and get better mileage...

But to answer your question I'd say in the mid 300 mark at best with the non-optimal cams and the shorties. The modular NEEDS a power adder, end of story. I know you plan on a blower later but I'd buy the blower first for the stock motor and enjoy 400hp while you build the "built" motor on the side. Or just swap in a Coyote.
I didn't ask but I assume you believe mid 300 at the tires? Is it possible to nudge 400HP (rwhp) N/A and what am I missing?
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Old 04-30-2015, 03:28 PM   #12
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I didn't ask but I assume you believe mid 300 at the tires? Is it possible to nudge 400HP (rwhp) N/A and what am I missing?
No he is saying go forced induction and keep it at 400 while you build another motor
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Old 04-30-2015, 04:18 PM   #13
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For 400whp NA you either need a big inch 2v (5.3) or high compression (13.5:1+)


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Old 04-30-2015, 04:58 PM   #14
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For 400whp NA you either need a big inch 2v (5.3) or high compression (13.5:1+)


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Probably both!

You can't have it both ways gward...
A N/A engine wont be a particularly strong forced induction engine, and an FI engine wont be a very strong N/A engine.
If you plan on boost later, you will have to leave the stock compression ratio... Or lower it. Coupled with your cam choice, that is not a good recipe for hitting 400 hp on motor.
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Old 04-30-2015, 06:07 PM   #15
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325whp maybe if your lucky
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