my friends eg is currently an 85mm89 ls crank gsr block with Rs sleeves. Now with the all motor setup it ran 11.80s at 115 and hes wanting to go boost, can he just get some cp 9:1 and pauter or manley rods and get 600+whp or does he have to scratch that and get another block done in 84mm? The head has portjob jg manifold 74tb valve springs retainers any help appreciated.


Modified by 1Quikgsr at 11:44 PM 4/9/2007

 

tttttttttt

 

unless its a race car then I wouldnt do it. those sleeves are to thin to make 600whp on a 85mm bore. go with 84 mm if its a "street car" expect rebuilds like once a yr if not sooner on 85mm w/boost.
also check with the guy who ported the head and ask if the port work is for turbo applications aswell becuase if he really knows what hes doing he will know that its not the same and it changes between applications. yeah you can use it but if your trying to sqeeze every little bit out then theres things to consider.
I would just sell that motor and start from scratch. youll save time and money in the long run.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 90 integra &raquo;</TD></TR><TR><TD CLASS="quote">unless its a race car then I wouldnt do it. those sleeves are to thin to make 600whp on a 85mm bore. go with 84 mm if its a "street car" expect rebuilds like once a yr if not sooner on 85mm w/boost.
also check with the guy who ported the head and ask if the port work is for turbo applications aswell becuase if he really knows what hes doing he will know that its not the same and it changes between applications. yeah you can use it but if your trying to sqeeze every little bit out then theres things to consider.
I would just sell that motor and start from scratch. youll save time and money in the long run.</TD></TR></TABLE>


he wants to run the spfwd classes as well as drive it on the weekends..

 

my friend is running 85mm with 7xxwhp. arias on pauters..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by zeimbo &raquo;</TD></TR><TR><TD CLASS="quote">my friend is running 85mm with 7xxwhp. arias on pauters..</TD></TR></TABLE>

thats what i would like to hear

 

85 is fine don't even worry abt. the only downside is that if something messes up you have to resleeve but hell its already sleeved.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by bigbadboy &raquo;</TD></TR><TR><TD CLASS="quote">85 is fine don't even worry abt. the only downside is that if something messes up you have to resleeve but hell its already sleeved.</TD></TR></TABLE>Agreed

 

is there really even a difference between all motor porting and FI porting.

I know what it takes for a good FI porting, and i wouldnt think that the all motor porting wold be too far from that.The springs and retainers is definatly a plus for either.

 

im running an old b-17 with 85mm bore, 15psi put down 380hp, just over 1100 miles on it, so far so good

 

thanks for the info guys

 

ttttttttttttt

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 93supercoupe &raquo;</TD></TR><TR><TD CLASS="quote">is there really even a difference between all motor porting and FI porting.

I know what it takes for a good FI porting, and i wouldnt think that the all motor porting wold be too far from that.The springs and retainers is definatly a plus for either. </TD></TR></TABLE>

i would like to know also

 

I am doing 85mm as well aiming for close to 500 whp.

 

85mm will hold up fine. i wouldnt attempt 86mm and up though.

 

85mm is good just watch the coolant overflow and temp gauge to make sure you don't blow the HG....the area on the HG between cylinders is going to be very thin. . .