56 CC 5.3 Lingenfelter Heads. What would you do?
01-15-2009, 07:20 PM
#1
56 CC 5.3 Lingenfelter Heads. What would you do? Well, Im still completely torn on my decision for my cam. My heads are what's causing my dilemma. Heads are,
862 casting, 5.3 liter, 2.02-1.6 valves, and milled to 56 CC.
Very small combustion chamber for sure. The motor is,
6.0 LQ4
Heads listed above
FAST 92mm
PTM 92mm
Kooks 1 7/8
Mufflex "style" exhaust - spin tech muffler
DTS 12 bolt with 3.73's.
Initially I was think T-V.2. No larger. No MS-series for sure. This is a street car almost 100%. Then When I find out the heads where actually milled PAST 59 CC I came to the realization that the V.2 would not clear without flycutting. Which is not an option.
Then I went to a 228-228. Jon and TSP said he wasn't even sure if that wont fit with PTV issues. Now I'm totally bummed out. Wasn't really looking for a 224 or alike size cam.
The car now has insane torque. Crazy threw 3rd gear. But is lacking some serious top end HP. The torque is fun as hell with MT ET's.
So, if this was your car... Would you keep the 56 CC Lingenfelter worked heads and hope the the compression gives you the torque you need for your track times/street needs. When I put my numbers in I get 10.9:1 CR with a .055 gasket. Does the 288 or even the V.2 sound too large to install with my set up?
Or,
Sell the 5.3 56 CC and buy some 243 worked casting and stick a larger camshaft in there?
862 casting, 5.3 liter, 2.02-1.6 valves, and milled to 56 CC.
Very small combustion chamber for sure. The motor is,
6.0 LQ4
Heads listed above
FAST 92mm
PTM 92mm
Kooks 1 7/8
Mufflex "style" exhaust - spin tech muffler
DTS 12 bolt with 3.73's.
Initially I was think T-V.2. No larger. No MS-series for sure. This is a street car almost 100%. Then When I find out the heads where actually milled PAST 59 CC I came to the realization that the V.2 would not clear without flycutting. Which is not an option.
Then I went to a 228-228. Jon and TSP said he wasn't even sure if that wont fit with PTV issues. Now I'm totally bummed out. Wasn't really looking for a 224 or alike size cam.
The car now has insane torque. Crazy threw 3rd gear. But is lacking some serious top end HP. The torque is fun as hell with MT ET's.
So, if this was your car... Would you keep the 56 CC Lingenfelter worked heads and hope the the compression gives you the torque you need for your track times/street needs. When I put my numbers in I get 10.9:1 CR with a .055 gasket. Does the 288 or even the V.2 sound too large to install with my set up?
Or,
Sell the 5.3 56 CC and buy some 243 worked casting and stick a larger camshaft in there?
01-15-2009, 07:44 PM
#2
On The Tree
iTrader: (13)
Join Date: Oct 2005
Location: WI
Posts: 126
Likes: 0
Received 0 Likes
on
0 Posts
Wayyyyy too large for those heads. You'll have to cut HOLES in your pistons in order to get the valves to clear with that cam. 
I have 57cc TFS 215 heads, and I'm not saying how deep I notched my stock pistons.... but lets just say that I'm probably close to holding the record. I'm just waiting for all 8 pistons to break in half when I start the bitch up for the first time (great way to justify getting a new 408
)
I have 57cc TFS 215 heads, and I'm not saying how deep I notched my stock pistons.... but lets just say that I'm probably close to holding the record. I'm just waiting for all 8 pistons to break in half when I start the bitch up for the first time (great way to justify getting a new 408
)
01-15-2009, 07:46 PM
#3
TECH Fanatic
iTrader: (9)
Join Date: Nov 2005
Location: Mass
Posts: 1,311
Likes: 0
Received 0 Likes
on
0 Posts
With 56cc I think your SCR will be more like 12.X:1. And then a small cam without much overlap will compound the problem and give you a DCR that is way too high. I think you need heads with bigger chambers.
Here's a great DCR calculator thread in case you haven't seen it:
https://ls1tech.com/forums/generatio...sier-than.html
Here's a great DCR calculator thread in case you haven't seen it:
https://ls1tech.com/forums/generatio...sier-than.html
01-15-2009, 07:49 PM
#4
Sooooo... what size cam did you run??? I know the V.2 will not clear even if the Lord himself installed it. I was really hoping the 228 would clear. If the 228 does not,
Would it be worth it to keep these (very nice) heads and stick a smaller cam in there (224 I suppose ): ---- ) And hope the increase in compression nets me some extra torque can hopefully get to the ground, Or sell them and get a 243 worked casting with larger cam?
I really do not want to flycut.
Would it be worth it to keep these (very nice) heads and stick a smaller cam in there (224 I suppose ): ---- ) And hope the increase in compression nets me some extra torque can hopefully get to the ground, Or sell them and get a 243 worked casting with larger cam?
I really do not want to flycut.
01-15-2009, 07:55 PM
#6
With 56cc I think your SCR will be more like 12.X:1. And then a small cam without much overlap will compound the problem and give you a DCR that is way too high. I think you need heads with bigger chambers.
Here's a great DCR calculator thread in case you haven't seen it:
https://ls1tech.com/forums/generatio...sier-than.html
Here's a great DCR calculator thread in case you haven't seen it:
https://ls1tech.com/forums/generatio...sier-than.html
I can not view those files because I did not purchase Mic Excel for my MAC yet. Im a cheap *** when it comes to computer stuff.
You really think I need a larger chamber head for a street car?
Whats everyones elses opinion on my setup and my possibility's?
01-15-2009, 07:58 PM
#7
Pretty much because of the extra money involved. Also, dont you have to have it balanced afterwards? It all comes down to money really. I have a full exhaust, intake, a rear end, and a set of heads that are slightly pissing me off. Just trying to get 430-40(ish) RWHP and stop spending money. Also, I do not want to pay anyone to flycut for me. I can see that costing me alot of cash.
Thats the only reason why I dont want to.
Thats the only reason why I dont want to.
Trending Topics
01-16-2009, 11:00 AM
#11
11 Second Club
iTrader: (2)
Join Date: Dec 2005
Location: Lititz,Pa.
Posts: 128
Likes: 0
Received 0 Likes
on
0 Posts
May as well add my opinion-your going to have to sell those heads or flycut.As was posted allready your compression is so high you need a large cam with alot of overlap or your gonna need to run race gas.I was quoted $300 to flycut.Can you sell your heads without losing money? It may be cheaper to flycut if you really would like to keep the heads you have.BTW I don't think a 228 cam is gonna fit.
