UltraZLS1

iTrader: (13)

Going to be doing a H/C build over the winter. When I previously set up my ls1 I had the DCR and SCR all configured. I have been out of the game for a bit and cant seem to compute it for the ls3. I have tried a few links and dont trust myself.
I want to make sure I get the right cam, head gasket and combustion chamber CC before I make purchases. I asked Jason from Texas speed about it and have had no luck.

Looking to go as high as I can on DCR and SCR and still run 93 octane pump gas. The car is going to stay NA.

Here are the Build details.

-Stock LS3 bottom end.

-PRC 250 CC aftermarket casting heads. They are available with 60-68CC Combustion chambers. Not going to mill them. Run a thinner head gasket instead.

-Texas Speed Tsunami 235/240 .648"/.609" Camshaft 111 LSA and I believe +4 advance is ground in on most of their off shelf cams.

- .040 Cometic Head gasket. 4.085 bore

- Dont think I will need valve reliefs even with the .040 cometic. This cam will barely clear with regular LS3 heads and these are supposed to have .040 more clearance according to TSP.

So...what would this build produce for DCR and SCR as is with 68CC combustion chambers? How high can you go with DCR and pump gas?....8.7?

Thanks a lot for the help.

litle88

iTrader: (20)

For DcR we'll need your Abdc of that intake valve for that cam. Get the specs from TSP.

But if you ask me, I believe that is the wrong cam for that motor. What are your goals?

UltraZLS1

iTrader: (13)

Thought about posting that.

Is it Advertised duration - duration at 0.050", /2, plus the IC at 0.050 ? I'll have to go find the specs.

Goals are pretty close to max effort street and strip car with pump gas. I dont mind a little rough idling/driving. I had a 228/230 in my ls1 and it was too small for my taste. Car will have a fast 102/102tb as well. Looking for about ~520rwhp.

djfury05

iTrader: (30)

Do you have E85 near you? Btw my home town is Manchester

UltraZLS1

iTrader: (13)

Cool. City of jackson...I live in the town of Hanover. We actually played you guys in sports etc in high school.

Yes I have E85 around...but I am not interested in the conversion really. Is it the new thing? I havent heard of many LS guys doing it. But then again I havent been looking for it either.

djfury05

iTrader: (30)

E85 just allows you to run even higher compression still on "pump" gas. You could probably run 13.1 easily on that. Just requires larger injectors and probably a feed line at some point if it becomes a restriction. I haven't looked into it much since we have no E85 near me in NC now.

I remember playing Hanover a lot in high school.. lotta wins for Manchester lol

UltraZLS1

iTrader: (13)

Ya I knew about the higher octane etc...just not interested I guess lol. Plan on spending enough money etc without having to worry about the conversion etc.

Yes in football we always lost to you. Our football team sucked. They are better now. Finally got a youth program going when I was in 8th grade.

Baseball....go either way.

Basketball...we went to state quarter finals my senior year.

The girls volleyball team usually kicks *** lol.

litle88

iTrader: (20)

Need this On the lower left.

UltraZLS1

iTrader: (13)

Thanks for the help litle...but I have decided to have Pat G spec me a cam after several people recommending him.