High vs. Low Compression

87StangLX · November 1st, 2007, 08:13 PM

Is it better to have high compression pistons with a twin screw supercharger or low compression? What about with a centri supercharger?
J/W

87StangLX · November 1st, 2007, 08:15 PM

never mind!!! found a diff thread dat talks bout dis!! sry i'm still a little bit of a newb

00vabchgt · November 1st, 2007, 08:17 PM

you want lower compression with forced induction. typically, lower for twin screw or roots type blowers than for centri blowers...

MATT02GT · November 5th, 2007, 01:10 PM

High compression = N/A.... Low compression= boost

BWAL09 · November 5th, 2007, 01:14 PM

each 1.0 compression drop (let's say from 9.0:1 to 8.0:1) you would be able to safely handle an extra 3 psi. of boost, as opposed to keeping your compression the same, if i remember correctly.

itschristorres8 · November 5th, 2007, 01:37 PM

are you sure its that much? 8.0:1 or 8.9:1
cuz 9.0 to 8.0 is a noticable difference

BWAL09 · November 5th, 2007, 01:40 PM

Originally Posted by itschristorres8

are you sure its that much? 8.0:1 or 8.9:1
cuz 9.0 to 8.0 is a noticable difference

i'm not 100% sure, but i'm thinking that's what i read somewhere

87StangLX · November 5th, 2007, 08:50 PM

k, so how much psi could a stock bottom end handle reliably? an not only that, but how much boost does a base model KB 2.2L s/c pump out?

BWAL09 · November 5th, 2007, 08:54 PM

Originally Posted by 87StangLX

k, so how much psi could a stock bottom end handle reliably? an not only that, but how much boost does a base model KB 2.2L s/c pump out?

it depends on what size pulley you opt for

87StangLX · November 7th, 2007, 04:02 PM

first let us jus say that i stick with the supplied pulley. how would it be then? and if it would handle it fine, then what is the max pulley size that you think i could go with an still make the car streetable/reliable?

BWAL09 · November 7th, 2007, 06:36 PM

Originally Posted by 87StangLX

first let us jus say that i stick with the supplied pulley. how would it be then? and if it would handle it fine, then what is the max pulley size that you think i could go with an still make the car streetable/reliable?

when you order a new KB, you have to tell them which sized pulley you want

87StangLX · November 8th, 2007, 08:09 PM

what size would you reccomend cuz i wanna make a good amount of power but no so much that i chance crackin the block or have some other kind of catastrophic failure? cuz i heard b4 that stock blocks on a 87 lx can handle 400 hp whereas another thread said that they could handle 500 hp.

Devine · November 17th, 2007, 10:26 AM

Originally Posted by 87StangLX

what size would you reccomend cuz i wanna make a good amount of power but no so much that i chance crackin the block or have some other kind of catastrophic failure? cuz i heard b4 that stock blocks on a 87 lx can handle 400 hp whereas another thread said that they could handle 500 hp.

I think above 400-450 it just depends on your environment. Some people have successfully run 550hp on these for a fair amount of time. I believe general rule of thumb is over 500hp = borrowed time.

87StangLX · November 17th, 2007, 10:39 PM

so since my car has 120 k miles on it i am leanin toward boring it to .30 over and gettin all new internals (not sure what specs yet.... plz help), and probly some trickflow 65cc heads and top it all off with a KB. sound like a good plan? suggestions on internals are mich appreciated.

87StangLX · November 17th, 2007, 10:42 PM

what cam would anyone reccommend for this set-up? i am not looking for something to lobey but still to wear it will give the car a distinct exhaust note and for it to work well with the trickflow heads and s/c. i've heard bout f 303, b 303, etc. but don't know what to get...

November 1st, 2007, 08:13 PM	#1
87StangLX Regular Join Date: Jul 2007 Posts: 200	High vs. Low Compression Is it better to have high compression pistons with a twin screw supercharger or low compression? What about with a centri supercharger? J/W

November 5th, 2007, 01:10 PM	#4
MATT02GT Hardcore Enthusiast Join Date: May 2007 Location: COLORADO Posts: 1,571	High compression = N/A.... Low compression= boost __________________ Its not how fast you drive, but how you drive fast. 2002 Mustang GT... Just The Usual Bolt-Ons

November 5th, 2007, 01:37 PM	#6
itschristorres8 I Post Entirely Way Too Much 2000 Mustang V6 unknown @390 Join Date: Aug 2006 Location: south florida Posts: 14,351	are you sure its that much? 8.0:1 or 8.9:1 cuz 9.0 to 8.0 is a noticable difference __________________

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November 1st, 2007, 08:15 PM	#2
87StangLX Regular Join Date: Jul 2007 Posts: 200	never mind!!! found a diff thread dat talks bout dis!! sry i'm still a little bit of a newb

November 5th, 2007, 08:50 PM	#8
87StangLX Regular Join Date: Jul 2007 Posts: 200	k, so how much psi could a stock bottom end handle reliably? an not only that, but how much boost does a base model KB 2.2L s/c pump out?

November 7th, 2007, 04:02 PM	#10
87StangLX Regular Join Date: Jul 2007 Posts: 200	first let us jus say that i stick with the supplied pulley. how would it be then? and if it would handle it fine, then what is the max pulley size that you think i could go with an still make the car streetable/reliable?

November 8th, 2007, 08:09 PM	#12
87StangLX Regular Join Date: Jul 2007 Posts: 200	what size would you reccomend cuz i wanna make a good amount of power but no so much that i chance crackin the block or have some other kind of catastrophic failure? cuz i heard b4 that stock blocks on a 87 lx can handle 400 hp whereas another thread said that they could handle 500 hp.

November 17th, 2007, 10:39 PM	#14
87StangLX Regular Join Date: Jul 2007 Posts: 200	so since my car has 120 k miles on it i am leanin toward boring it to .30 over and gettin all new internals (not sure what specs yet.... plz help), and probly some trickflow 65cc heads and top it all off with a KB. sound like a good plan? suggestions on internals are mich appreciated.

November 17th, 2007, 10:42 PM	#15
87StangLX Regular Join Date: Jul 2007 Posts: 200	what cam would anyone reccommend for this set-up? i am not looking for something to lobey but still to wear it will give the car a distinct exhaust note and for it to work well with the trickflow heads and s/c. i've heard bout f 303, b 303, etc. but don't know what to get...

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