How much power would this engine build have?

crashGTR1 · Feb 2, 2004

Hey everyone. I'm forming my plan for somewhere in the future...to build up a 4V motor. I've been toying around with the idea of buying a new Mach 1 motor from KarKraft (as opposed to doing the P&P P.I. headswap) and now I'm thinking about how I would want to mod it. If I took a stock Mach 1 engine (260-280 rwhp/270-300 rwtq stock) and replaced the shortblock with a VT Engines 324 Stroker shortblock, replaced the stock heads with Ford Racing FR500 heads (with or without P&P), replaced the stock cams with ModMax Racing 370-25202 'DOHC N/A Hi-Perf. Street and Racing' cams, and had the stock intake manifold ported/polished, how much rwhp and rwtq would I be potentially looking at? If I go through with this, something this involved, I want downright amazing performance. I'm determined to stay NA and I think this is what I'd want for more power. How much do you think this setup would put out? Please help. Thanks.
--Adam

FallenPhoenix · Feb 2, 2004

you'll make ~150hp at the crank, build the engine and give it to me then you'll feel better about yourself.

GinoGT · Feb 2, 2004

crashGTR1 said:
Hey everyone. I'm forming my plan for somewhere in the future...to build up a 4V motor. I've been toying around with the idea of buying a new Mach 1 motor from KarKraft (as opposed to doing the P&P P.I. headswap) and now I'm thinking about how I would want to mod it. If I took a stock Mach 1 engine (260-280 rwhp/270-300 rwtq stock) and replaced the shortblock with a VT Engines 324 Stroker shortblock, replaced the stock heads with Ford Racing FR500 heads (with or without P&P), replaced the stock cams with ModMax Racing 370-25202 'DOHC N/A Hi-Perf. Street and Racing' cams, and had the stock intake manifold ported/polished, how much rwhp and rwtq would I be potentially looking at? If I go through with this, something this involved, I want downright amazing performance. I'm determined to stay NA and I think this is what I'd want for more power. How much do you think this setup would put out? Please help. Thanks.
--Adam

Why bother buying the engine from KarKraft at all? You would be replacing all the parts anyway.

The "core" they refer to for 4V engines only means the block. You can buy one through them, so you don't really need a 4V shortblock or anything to start out with.

So after that, all you would need is the intake manifold, accessories, harness, and the little stuff (injectors, plugs, etc.)

No idea on the power, but it would no doubt be impressive. Not to mention that thing would rev like a maniac. 8000rpms, maybe more. I would love to hear what an engine like that sounds like.

crashGTR1 · Feb 2, 2004

GinoGT said:
Why bother buying the engine from KarKraft at all? You would be replacing all the parts anyway.

The "core" they refer to for 4V engines only means the block. You can buy one through them, so you don't really need a 4V shortblock or anything to start out with.

So after that, all you would need is the intake manifold, accessories, harness, and the little stuff (injectors, plugs, etc.)

No idea on the power, but it would no doubt be impressive. Not to mention that thing would rev like a maniac. 8000rpms, maybe more. I would love to hear what an engine like that sounds like.

Actually, I just thought about that now. If I were actually thinking/awake when I started this thread, I would have just done it like this: bought the 324 Stroker shortblock from VT engines, bought the FR500 cylinder heads and valvetrain kit (without cams), decide whether or not I want the heads ported and polished, get the ModMax cams, intake manifold, and all of the accessories. It would be a hell of alot cheaper.

BTW, what would make it rev all the way up to 8,000? I know my stock GT will rev to 6,000, the Mach 1 to about 7,000. So what causes the higher redline? The stroker block? Thanks.
--Adam

GinoGT · Feb 2, 2004

crashGTR1 said:
Actually, I just thought about that now. If I were actually thinking/awake when I started this thread, I would have just done it like this: bought the 324 Stroker shortblock from VT engines, bought the FR500 cylinder heads and valvetrain kit (without cams), decide whether or not I want the heads ported and polished, get the ModMax cams, intake manifold, and all of the accessories. It would be a hell of alot cheaper.

BTW, what would make it rev all the way up to 8,000? I know my stock GT will rev to 6,000, the Mach 1 to about 7,000. So what causes the higher redline? The stroker block? Thanks.
--Adam

It's all in the computer. You could rev a stock GT to 8000 if you wanted to, but it would probably blow into a million pieces before it even got there. The trick is building the engine strong enough to handle the revs.

FallenPhoenix · Feb 2, 2004

there would also be no point in revving most large displacement engines to 8k. At that point they're making much less power than at peak. If you can keep it breathing then you can rev higher and make power that high too.

GinoGT · Feb 2, 2004

I'm guessing it would take some cams with lots of duration and lift. But that might take too big of a toll on your low end. Maybe with a Cobra intake manifold with the IMRC's, you could have one of the intake valves in each cylinder on a mild profile lobe, then have the other valve on a more extreme profile, which would only come into play when the IMRC's open. Kind of like a ghetto VTEC.

How much power would this engine build have?

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