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Discussion Starter #1
So im in the process of upgrading my cars components to be able to put on a vortech sc in the summer...so my question is what should i do to the rear end or should i just leave it alone? also how much rwhp can my transmission handle before i have to upgrade it?
 

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MM's V6 Hater
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need more info. what are your goals, budget, etc.

what all are you upgrading. you can sc a stock block and be good for around 415-425 what gers do you have. search button will answer a lot of your questions too.
 

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Discussion Starter #3
Car is a stock Bullitt and as far as goals go I'm looking at 400-500 rwhp. And ad far as budget goes I want to do it right the first time so ill take best recommendations and not go the cheap route
 

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Well for 500hp you need to build your engine with forged internals. I have a built rearend in my car but have a stock tr3650 with a spec stage 2+ clutch and just under 500rwhp. The trans can handle it for a while if you dont beat on the car alot and you dont track the car weekly.
 

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I'd read as much as you can on any Mustang website..then start asking specific questions for your particular build.
 

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Discussion Starter #6
So far I was thinking of getting 31 spline axles with the frpp differential and 3.73 gears. That should do it for the rear end right?
 

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US Air Force (retired)
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There is a world of difference between 400 rwhp and 500 rwhp. For 400 rwhp all you need is a complete supercharger kit. As long as you run street tires and the stock clutch your transmissiona and rear end should hold up fine.

500 rwhp requires forged internals. You will have absolute no traction with street tires so you will want to run DRs on the street and slicks at the track. Upgrade to a 31 spline axle and stronger clutch is recommended. After you upgrade the rearend the next weakest link is the input shaft of the transmission. To beef it up you will need a 26 spline input shaft and clutch disc.

It takes a lot of $$$ to run 500 rwhp.
 

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Which supercharger? Do you plan on running slicks or drag radials? If you plan on running a sticky tire then do the rearend upgrade. You can safely make 400rwhp or less with a basic intercooled supercharger kit. Pushing it past 10psi on a stock shortblock is not recommended. You might need to upgrade the clutch depending on the condition of your current one. I've been on the stock clutch and supercharged for 2.5 years with 61,000 miles on the car. I daily drive the car and it is on street tires 99.9% of the time so my clutch will last. At the track it took 5500rpm clutch dumps on drag radials without a problem.
 

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Discussion Starter #10
I was thinking about putting on a vortech and running some nitto 555r and keeping at 9 psi until I install forged pistons and rods
 

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US Air Force (retired)
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Well I have nothing but time so ill just take my time and do it right
To get to 500 rwhp it will take about $20,000. I'm half way there. I'm relunctant to spent the other $10,000. Perhaps you have a better cash flow than I have.
 

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Study up and come back. U will want to do fuel upgrades depending upon what power levels u want etc..
 

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I was thinking about putting on a vortech and running some nitto 555r and keeping at 9 psi until I install forged pistons and rods
Which trim? Will you stay non-intercooled or add an intercooler or meth? A non-intercooled V3 Si at 9psi will get you around 370rwhp.
 

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Intercooled either a v3 or v1 s-trim
Get an Si whether its a V1 or V3. If you are buying new get the V3 Si. Which intercooler are you going with? With the Bullitt intake and intercooeld you shouldn't have a problem getting into the 390-400rwhp range.
 

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Discussion Starter #16
I'm leaning more towards the v3 since im iffy about making a hole in my oil pan. I was thinking of going with a cxracing intercooler....or is there something better out there?
 

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I Poop Entirely Way Too Much
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Im running 475hp through a stock tranny and rear end. I put Nitto 555Rs on last spring and everything is holding together. I only have LCAs in the rear and the tires still spin once in a while when its hot, they spin all the time in the cold now. Its really come to how your drive it. If your dropping the clutch at every light your gonna break something at 300whp eventually.

As Eagle said 400 and 500hp are two different animals. IMO, If i didnt it again Id bolt on a blower for 380-420hp, then work on the rear suspension. Once thats done look at a built block. A 500whp car is only fast if you have traction.
 

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I Poop Entirely Way Too Much
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So just bolt on a blower and start upgrading from the rear to the front.
Pretty much. I wanted to break 400hp and ended up with 435whp on the stock block. Well the stock block now sits in the shed with a nice hole in it. And it became a mess after that. a straight bolt on blower will be plenty of power for the time being.
 
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