90mm bore and boost
08-26-2009, 07:50 PM
#1
Registered User
Thread Starter
90mm bore and boost
I REALLY would love to sleeve at 90 but obviously reliability goes south. Anyone having any luck on a 90mm block with boost? what engine builder did you use?
08-26-2009, 08:15 PM
#2
Registered User
Join Date: Nov 2005
Location: Nashville,Tn
Posts: 884
Likes: 0
Received 0 Likes
on
0 Posts
1. Past 89mm you can not o-ring the head and you will run into major issues with gaskets because of the big bore size. Sealing area becomes very small. This is not a big problem with N/A engines but being FI we have very little room to work. I am using a OEM gasket @ 89.5mm. The thickness is .030". Given your deck height after your new setup is install and how much comes off the head if you have it reworked ect ect ect may require you to modify the piston spec before installation do to having a limited amount of gaskets to use. I personally did not want to use cometic in any way esp @ that bore size. I see nothing wrong with a 88mm bore.
08-26-2009, 09:31 PM
#3
Registered User
Join Date: Oct 2006
Location: Westchester NY
Posts: 2,507
Likes: 0
Received 0 Likes
on
0 Posts
start with a small bore, that way if something gets f'ed up, you don't need new sleeves because you were already at the bore limit.
And it's not like the 1mm makes a big difference, if any at all, in power.
And it's not like the 1mm makes a big difference, if any at all, in power.
08-27-2009, 09:51 AM
#4
Originally Posted by m R g S r,Aug 27 2009, 01:31 AM
start with a small bore, that way if something gets f'ed up, you don't need new sleeves because you were already at the bore limit.
And it's not like the 1mm makes a big difference, if any at all, in power.
And it's not like the 1mm makes a big difference, if any at all, in power.
87mm FTW.
upp the boost for more power
Trending Topics
10-02-2009, 11:48 AM
#10
Join Date: Sep 2005
Location: Montreal, Qc
Posts: 452
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by juntuned,Aug 26 2009, 07:50 PM
I REALLY would love to sleeve at 90 but obviously reliability goes south. Anyone having any luck on a 90mm block with boost? what engine builder did you use?