Small bore LS7 heads
Former Vendor
Joined: May 2005
Posts: 3,749
Likes: 4
From: Valencia Ca
I haven't released them yet. The first sets were excellent as far as overall bore diameter but I wanted to be able to get the chamber size down to 58 cc.
The next casting run was on 40 pair and though the camber size was addressed properly, the bore size was too large....I will be turning these into LS7 heads.
Next run will be correct with small bore/small chambers...
The next casting run was on 40 pair and though the camber size was addressed properly, the bore size was too large....I will be turning these into LS7 heads.
Next run will be correct with small bore/small chambers...
Race Director
Joined: Aug 2005
Posts: 13,592
Likes: 187
From: Hudson WI
NCM Sinkhole Donor
Trickflow was supposed release these a year go and still nothing....
Not being in the casting and machining business, why do people have problems with LS7 heads for LS2 and Ls3 engines?
Not being in the casting and machining business, why do people have problems with LS7 heads for LS2 and Ls3 engines?
Former Vendor
Joined: May 2005
Posts: 3,749
Likes: 4
From: Valencia Ca
My issue is making the "bore size" correct & tight for the smaller bores without unduly shrouding the valves. The present castings we have are good on the 4.070" bore but just not right for prime time on the 4.0" (LS2). Hopefully, that will be resolved in the next month or so.
Tech Contributor
Joined: Mar 2003
Posts: 12,094
Likes: 197
From: Colorado Springs, CO
St. Jude Donor '08-'09-'10-'11
My issue is making the "bore size" correct & tight for the smaller bores without unduly shrouding the valves. The present castings we have are good on the 4.070" bore but just not right for prime time on the 4.0" (LS2). Hopefully, that will be resolved in the next month or so.
The stock LS3 castings measure 4.067" which is pretty perfect for the 4.065" LS3.
Race Director
Joined: Aug 2005
Posts: 13,592
Likes: 187
From: Hudson WI
NCM Sinkhole Donor
Once a bore is optimized for a small bore (4"), is it then less optimum for a larger than 4" bore? Does a bore being just right make it specific to an application being the opposite of shrouded.
The stock LS3 castings measure 4.067" which is pretty perfect for the 4.065" LS3.
The stock LS3 castings measure 4.067" which is pretty perfect for the 4.065" LS3.
