Originally Posted by moosestang

The b326 from brenspeed is not 5.0L, it's 5.34L, so pretty much the same displacement as mmr's block.

MMR has some great prices on short blocks, but I'd be hesitant to order a motor from them based on all the bad internet press.

Brenspeed is probably way more knowledgeable than anyone here, but those 39lb injectors are close to maxed out at 10psi.

Originally Posted by moosestang

The b326 from brenspeed is not 5.0L, it's 5.34L, so pretty much the same displacement as mmr's block.

MMR has some great prices on short blocks, but I'd be hesitant to order a motor from them based on all the bad internet press.

Brenspeed is probably way more knowledgeable than anyone here, but those 39lb injectors are close to maxed out at 10psi.

Originally Posted by moosestang

So what happened? 4-5 years is a long time to suddenly have a catastrophic failure. How many miles in that 4-5 years? Did it overboost? hellion has claimed a few engines around here.

Originally Posted by Diabolical!

I'm still running the 39s with 12-13 psi. Duty cycles do get over 90% at times, but I wouldn't run any more boost without a bigger injector.

Originally Posted by Lance9386

If this is in the wrong section I apologize.

I sent this to Brenspeed last night, while i wait for a reply, anyone here have some input?
Trying to get as many opinions as I can!
Thanks in advance!

Current situation: Hole in block! :-(

07 Mustang GT - Hellion 62mm turbo kit purchased and tuned by Brenspeed, ran it on 10 lbs of boost for 4 or 5 years..
Fuel pumps - GT500 fuel system w/ dual drivers.
Injectors - I think it is 39# injectors that came with the turbo kit
Brisk 3VR14S spark plugs

Everything else is stock.

Current options I am thinking of:

Goal - 800 rwhp or more (if I can get it out of these blocks, why not?!)
- HAS TO BE A DAILY DRIVER - RELIABLE - NEEDS TO KEEP AC - Max of 93 octane fuel
- Stock heads with a port and polish job
Q. Would this be sufficient for good flow compares to aftermarket heads?
A. 800 hp and reliable are not to be used in the same sentence. I don't think you will be able to make 800 rwhp on 93 pump gas.

Brenspeed B326 block (up to 1000hp)
Bolt on my current turbo kit w/ 62 mm turbo

Q. How much boost can I get out of that turbo?
A.You will maxing out that turbo at about 15#. It will make more but you will be way past the efficiency curve and will mostly make heat.

Q. If I need a bigger turbo, should I go 67mm or 76mm? Will these bolt up to the current kit?
A. 76mm but don't know about the flange.

Q. Wastegate, I think its a 38mm but can't remember for sure, maybe you know? Will I need a larger one? If so, what size?
A. At least a 50mm W/G.

Q. How much can my 39# injectors support before they need upgrading?
A. Not nearly enough
Q. If upgrading of the injectors is needed, what should I upgrade to?
A. You will need at least 80# injectors but 100's would be better for 800 hp.


Q. How much can I get out of the GT500 fuel pumps before they need upgrading?
A. The GT500 pumps max out around 550 hp with a turbo setup.

Q. If upgrading of the GT500 fuel pumps is needed, what should I upgrade to?
A. I would recommend a complete triple pump return style fuel system with those HP goals.

or

MMR 5.4 Street Mod 1000 (up to 1000hp) (Don't shoot me! haha)

I really like the idea of the extra displacement going with the 5.4 vs the 5.0. (Less boost more power in theory?)
I understand that I would have to use adapter plates to get the s197 intake manifold to bolt to the wider 5.4 block.
I have looked into the modifications necessary to fit this block and it seems fairly straight forward (Same wiring hardness, etc..)

I have always dealt with you guys and have been very satisfied.
Q. Can you tell me advantages and disadvantages of either option?
A. I wouldn't pour water on MMR if they were on fire.

Q. Would the power gain from a 5.4 block be enough to justify the extra work?
A. The B326 is 5.3L so you wouldn't gain much from a 5.4 swap.

Tuning -

I have always used the tune from you for my car.
I don't know of any shops nearby that I could trust more than you guys.

Q. If I went with the B326 block would a tune be included or would this be something that would cost extra?
A. Your kidding right?

Q. If I happen to use a 5.4 block, would you be able to provide a tune for this?
A.

Transmission -

I plan on getting a built TR-6060 6-speed.
Q. Any input on this whether it be negative or positive?
A. Go with the T56 Magnum XL instead of the TR-6060.

Boost Controller - AEM Tru-Boost
- Has overboost protection and adjustable boost levels on the fly.
I prefer the EBOOST2 myself.

Sorry so many questions, I want to do this right the first time, money is tight, but I do not want to sacrifice quality and regret it later.
So I am trying to build this car right for a reasonable price.

Thank you for your time and advice! It is greatly appreciated!

Originally Posted by retfr8flyr

Have you ever driven a car with this kind of HP on the street? It ceases to be fun with that kind of power. It's my experience that 500-600 is the best level for real fun on the street. With that HP level you can still get the car to somewhat hook, in the summer months, with a good set of DR's. I run my car at 600rwhp in the summer months and run M/T 305/45/18's on a 10 inch wide rim. The car will hook fairly well on a good surface but if I crank it up past that the tires just go up in smoke and I run an auto, which is much friendlier hooking on the street then a manual.


Earl