compression limits/etc.
Thread Starter
CF Senior Moments Member
Joined: Jan 2004
Posts: 1,329
Likes: 1
From: Oklahoma City Oklahoma
compression limits/etc.
LS2 block bored to 4.005"
Diamond forged pistons -14cc
Crower forged I-beam rods 6.125"
Eagle forged 4" stroke crank
A&A S/C (not installed yet) - looking for heads / cam
Considering what to buy for heads - your help is appreciated.
I see ebay AFR 225 62CC advertised good price - but that would put my compression around 10.8 (?right?)
Is that too high ? what are the limits here?
I understand less compression is more F/I friendly - but if I stay around 6-8-10 #s - with a good tune - will that be an issue?
Would I need to get he alky/meth injection ..?
Thank you (still learning - first step into F/I)
Burk
Diamond forged pistons -14cc
Crower forged I-beam rods 6.125"
Eagle forged 4" stroke crank
A&A S/C (not installed yet) - looking for heads / cam
Considering what to buy for heads - your help is appreciated.
I see ebay AFR 225 62CC advertised good price - but that would put my compression around 10.8 (?right?)
Is that too high ? what are the limits here?
I understand less compression is more F/I friendly - but if I stay around 6-8-10 #s - with a good tune - will that be an issue?
Would I need to get he alky/meth injection ..?
Thank you (still learning - first step into F/I)
Burk
Pro
Joined: Feb 2005
Posts: 652
Likes: 16
From: Upton MA
Don't forget about the head gasket. Stock gasket will bring you down to about 10.4. I looked on Ebay. I would call Tony Mamo @ AFR and order a set of 72CC chambers and go with an aproximate 9.5 comp. Easy to do it now versus later.
Pro
Joined: Sep 2008
Posts: 692
Likes: 4
From: PA
Tech Contributor
Joined: Apr 2007
Posts: 10,924
Likes: 78
From: Forney Texas
LS2 block bored to 4.005"
Diamond forged pistons -14cc
Crower forged I-beam rods 6.125"
Eagle forged 4" stroke crank
A&A S/C (not installed yet) - looking for heads / cam
Considering what to buy for heads - your help is appreciated.
I see ebay AFR 225 62CC advertised good price - but that would put my compression around 10.8 (?right?)
Is that too high ? what are the limits here?
I understand less compression is more F/I friendly - but if I stay around 6-8-10 #s - with a good tune - will that be an issue?
Would I need to get he alky/meth injection ..?
Thank you (still learning - first step into F/I)
Burk
Diamond forged pistons -14cc
Crower forged I-beam rods 6.125"
Eagle forged 4" stroke crank
A&A S/C (not installed yet) - looking for heads / cam
Considering what to buy for heads - your help is appreciated.
I see ebay AFR 225 62CC advertised good price - but that would put my compression around 10.8 (?right?)
Is that too high ? what are the limits here?
I understand less compression is more F/I friendly - but if I stay around 6-8-10 #s - with a good tune - will that be an issue?
Would I need to get he alky/meth injection ..?
Thank you (still learning - first step into F/I)
Burk
Melting Slicks
Joined: Oct 2005
Posts: 2,877
Likes: 9
From: Ottawa Ontario
Without meth, my IAT's are 178 at 17psi boost on pump. With meth, 75°. Lower intake temps and added octane. I like meth. Once you get used to the power, are you one of those guys like me and everyone I know that will want to turn it up? If so, get the right heads and the meth. Don't forget a good blower cam! To me, that's more important than heads.
I saw 55 degree in cooler weather on full boost.
Thread Starter
CF Senior Moments Member
Joined: Jan 2004
Posts: 1,329
Likes: 1
From: Oklahoma City Oklahoma
Thank you for your input ..
I'm agonizing over making a couple of decisions - should I put the S/C on my stock engine now - along with a ne clutch - or wait until I have the 402 with heads and cam ready?
It may be a while before I can finish getting all the additonal parts....
I'm leaning towards putting the S/C on now!! Even with the stock engine ..
I'm agonizing over making a couple of decisions - should I put the S/C on my stock engine now - along with a ne clutch - or wait until I have the 402 with heads and cam ready?
It may be a while before I can finish getting all the additonal parts....
I'm leaning towards putting the S/C on now!! Even with the stock engine ..
