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#21 · (Edited)
04GTAMPA said:
Just don't say anything else. You just can't come in here and say something can be done without knowing the results and consequences just because you googled it and found a couple of cases. The OP asked about options on a MACH1 block, not a full build, bored out cylinders, stoked out block - can you "BUILD" a high compression+F/I motor? Of course, but there is so much more involved in it and it does not work well on the 4.6 mod motor without pretty much changing to a bigger block, period.
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he already knew his internals would not hold it. He was looking at options for purchasing a rotating assembly.

Sombody said 8.5 comp pistons...i said bad idea

changing to a bigger block? no
stroking? no

alighn hone, deck, and overbore (as little as possible; .005 or.010 if possible)
stock cobra crank
billet oliver rods
je pistons

nothing crazy about it... easy 800 at the crank

Talk to any half decent mod motor builder and they will reccommend high compression. HPP performance, mihovetz, hyland, etc.
 
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#22 ·
Trick Tuners said:
majorownage said:
Its been proven that high compression and boost go together... you just need very nice parts.
/QUOTE]



Exactly. high compression and high boost make great numbers, but will require race gas for sure. For max power on pump gas you want low compression and high boost. You will loose off boost performance and mpg, but who cares!
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For max hp, sure race gas will make more. But so will a 8.5:1 compression engine would make more hp on race gas as well.

Loose mpg and performance out of boost? Are you crazy? A high compression engine is more efficient, leading to more performance and mpg...

import peeps have been turboing 10:1 engines for a while too....
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#23 ·
majorownage said:
Loose mpg and performance out of boost? Are you crazy? A high compression engine is more efficient, leading to more performance and mpg...
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I said that for LOW compression:p
 
Discussion starter · #24 ·
Uhh...What? High compression and high boost do NOT go together. My mom's car (2006 ion redline) has a compression ratio of 10:1 and is limited to 16PSI on that compression ratio...This reminds me of an old friend telling me his 95' civic had 16:1 (that's right, 16..) compression and he was pumping 15PSI in that bitch. I would think 9:1 or 8.5:1 is a good compression ratio. Now that I think about it, I might want to throw a whipple on it instead...I don't know yet.
 
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#26 ·
StangBanger302 said:
I might want to throw a whipple on it instead...I don't know yet.
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Now you're thinking :D
keep the Mach 1 aluminum WAP block. grab a forged cobra crank and some manley rods like the 03 cobra's have and some good forged pistons with right around 9:1 is how i would build a Mach 1 IF i had one.
 
#27 ·
LGHTNG02GT said:
Now you're thinking :D
keep the Mach 1 aluminum WAP block. grab a forged cobra crank and some manley rods like the 03 cobra's have and some good forged pistons with right around 9:1 is how i would build a Mach 1 IF i had one.
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mach 1's have iron NVH blocks...
 
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#30 ·
majorownage said:
Trick Tuners said:
For max hp, sure race gas will make more. But so will a 8.5:1 compression engine would make more hp on race gas as well.

Loose mpg and performance out of boost? Are you crazy? A high compression engine is more efficient, leading to more performance and mpg...

import peeps have been turboing 10:1 engines for a while too....
Click to expand...


Not really crazy loosing hp on boost.
You look at it this way the only time you really get good gas mileage on boost is when its a small or a small then big sequential turbo setup designed to aid the engine in getting air for the sole purpose of efficiency.
I know god damn well when my boost kicks in my mpg's drop quite a bit.
Now not to say they drop as much as a blown motor because it doesent.

And a lot of those import "peeps" are ****ing dipshits and blow their motor in a few months.
I don't know what your talking about saying people recommend hc motors for turbo applications.It creates far too much heat and the internals cannot withstand the heat and the intense pressure.


:welcome
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#31 ·
haha i couldnt agree more about the import guys. most of them are a bunch of tards. my one buddy is real stuck on honda's 1.6 SOHC VTEC's. he builds them with stock CR and then pushes like 24+ psi through it and they only last a year. he built 3 so far and he openly tells people it will be fast for a year then it will break.
 
Discussion starter · #32 ·
LGHTNG02GT said:
haha i couldnt agree more about the import guys. most of them are a bunch of tards. my one buddy is real stuck on honda's 1.6 SOHC VTEC's. he builds them with stock CR and then pushes like 24+ psi through it and they only last a year. he built 3 so far and he openly tells people it will be fast for a year then it will break.
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AND, on top of that, I bet they aren't all that fast :D
 
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#33 ·
i laugh at ricers talking about pushing 20+ lbs of boost and you look down and see the tubing is less then an inch in diameter
 
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#34 ·
There was a brand new production iron 5.4 block on ebay for 350$

You could have the Mach and whatever block you want on the side to build while you drive the mach. No down time
 
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#36 ·
manly rods, 03/04 cobra crank, .20 over cp flat tops (about 9.5;1 comp with my heads), blower cams, ported heads, and 15psi is my recipe for my 550hp to the rear wheels on pump gas.
 
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#37 ·
i had 8.5-1 compression pistons with .20 overbore, stock heads and on 15psi with a v2sc made 460 with bad tune. my tuner said he'd like to see at least 9.0-1 compression at least. flat top pistons do just fine with boost and a tuner that knows whats their doing.
 
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#38 ·
98Cobra_sleeper said:
i had 8.5-1 compression pistons with .20 overbore, stock heads and on 15psi with a v2sc made 460 with bad tune. my tuner said he'd like to see at least 9.0-1 compression at least. flat top pistons do just fine with boost and a tuner that knows whats their doing.
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THANK YOU

lol
 
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#39 ·
majorownage said:
THANK YOU

lol
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You're right that a lot of builders are going to a low 10 CR, but in order for it to be safe the tune has to be spot on. It's all in the tune. There's more room for error with a lower CR.

And the Mach has an aluminum block, not iron.
 
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#40 ·
Mach Boy said:
You're right that a lot of builders are going to a low 10 CR, but in order for it to be safe the tune has to be spot on. It's all in the tune. There's more room for error with a lower CR.

And the Mach has an aluminum block, not iron.
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I could have sworn they had iron blocks.

Thanks for correcting me.

When I get some time off I hopefully will make a thread about my HC cobra build.

I also have a turbo cleveland on the back burner as well...but thats a different story for another forum.
 
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